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5 Technická
166 28 Prague 6 – Dejvice
IČO: 60461337
VAT: CZ60461373

Data mail: sp4j9ch

Copyright UCT Prague 2014
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History

The Faculty of Chemical Engineering has its origins in the Prague School of Chemical-Technological Engineering founded in 1920 as part of the Czech Technical University. In 1960, the Faculty of Chemical Production, Automation and Economics was established in response to the need of the chemical industry to enhance its process and economic disciplines, as well as its chemical ones. In 1969 it was renamed the Faculty of Chemical Engineering.

Study

The Faculty of Chemical Engineering offers the following forms of study:

  • Three-year BSc study programmes leading to the Bc. title
  • Two-year consequential MSc study programmes leading to the Ing. title
  • Four-year PhD study programmes leading to the Ph.D. title
  • Various types of short-term courses provided within the programme of adult education.

Our Faculty offers full study programmes for foreign students and also programmes for exchange and visiting students.

Research

Research conducted by the departments of the faculty can be divided into six main streams:

  1. Chemical engineering; modelling and experimental verification of systems involving hydrodynamics, mass transfer and/or chemical reactions; dynamics of chemical and biological systems; chemical robotics
  2. Measurement, analysis, modelling and control of processes and systems of chemical technology, biotechnology and bioengineering; information engineering; signal and image processing; computer vision and control engineering
  3. Supply systems management of the food and chemical products: design, modelling and simulation; marketing, logistics and financial collaboration in supply chain management
  4. Molecular modelling and simulation; structural, spectroscopic and thermodynamic properties of environmentally or biologically important substances and their complexes
  5. Physical, physicochemical and chemical measurements and analyses; advanced separation techniques including chromatographic, electromigration and hyphenated techniques; physical and chemical sensors; molecular recognition
  6. Biospectroscopy; atomic spectroscopy together with speciation analysis; molecular spectroscopy, including chiroptical methods; high resolution spectroscopy
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Research activities at the Faculty of Chemical Engineering take place in seven departments that have their own educational and research programs in the field of basic and applied research. The research is concentrated in a number of research laboratories and research groups.

The faculty staff is involved in a number of grant projects funded by both internal and external national and European grant agencies. Students are involved in scientific research at all stages of their studies, in internal grant agency projects and under the guidance of their supervisors in other research projects.

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Dean

prof. Ing. Michal Přibyl, Ph.D.
e +420 220 444 445
b Michal.Pribyl@vscht.cz

prof. Ing. Michal Přibyl, Ph.D.

Vice-Dean for International Relationships

Ing. Pavel Hrnčiřík, Ph.D.
e +420 220 444 296
b Pavel.Hrncirik@vscht.cz

Ing. Pavel Hrnčiřík, Ph.D.

Faculty Secretary

Ing. Kamila Klaudisová, Ph.D.
e +420 22044 3281
b Kamila.Klaudisova@vscht.cz

Ing. Kamila Klaudisová, Ph.D.

Contact Persons for Foreign Students

Jana Nývltová
e +420 22044 3891
b Jana.Nyvltova@vscht.cz




Hana Svobodová
e +420 22044 3891
b Hana.Svobodova@vscht.cz

Jana Nývltová

Hana Svobodová

Webmaster of faculty

Ing. Iva Nachtigalová, Ph.D.
e +420 22044 4259
b Iva.Nachtigalova@vscht.cz

Ing. Iva Nachtigalová, Ph.D.
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Page not found. Please, let us know about this error on webmaster@vscht.cz.

You can also see this error because this page does not exists in selected language. Please continue on homepage.

Thank you! 

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List of available PhD theses

"Transparent ceramics for optical applications synthetized by pressure- or vacuum-assisted sintering methods

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemie (double degree)

Annotation

Transparent ceramics can compete with single crystalline materials not only in the stage of research and development but also in the final application. The thesis will be focused on the synthesis of oxide ceramics applicable in the laser or LED field, or utilizable at the detection of ionizing radiation. Spark plasma sintering (SPS) or vacuum sintering will be used for the processing of precursor powders whose optimal crystallinity and microstructure will be also the task of the thesis.

(DRAFT) Design and Implementation of an Animated Bioreactor Model//for Web-Based Presentation.

Department: Department of Computing and Control Engineering, Faculty of Chemical Engineering
Study programmes: Engineering Informatics, Chemistry

2D materials for photo-electrochemical decomposition of water

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

Annotation

This thesis is focused on the use of 2D nanomaterials based on layered chalcogenides and their composites for photo-electrochemical water splitting. Student will work on tailoring of their properties by doping, surface functionalization and composition optimization in order to reduce overpotential for photocatalytic hydrogen evolution and optimize the response of materials to different wavelengths of light in the visible and ultraviolet region.

2D nanomaterials for energy applications

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

Annotation

This thesis is focused on the investigation of applications of new layered materials based on transition metal chalcogenides for the construction of cathodes in Li and Na batteries. These materials will be studied in terms of the relation between their structure and composition; and their stability and capacity. The prepared materials will be studied in detail using advanced analytical techniques (HR-SEM and HR-TEM; AFM; XPS; Raman spectroscopy; electrochemical techniques).

2D nanomaterials for the detection of pollutants in the environment

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: doc. RNDr. Martin Pumera, Ph.D.

Annotation

Candidate will fabricate 2D materials for environmental remediation. He/she will develop efficient catalyst to remove nitroaromatic and pesticide pollutants in ground waters using electrochemical and photoelectrochemical methods. More on www.nanorobots.cz

3D printing for the preparation of 3D graphene electrodes for detecting the decontamination of pollutants in the environment

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: doc. RNDr. Martin Pumera, Ph.D.

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Candidate will fabricate 3D printed electrodes for environmental remediation. He/she will develop efficient catalyst to remove nitroaromatic and pesticide pollutants in ground waters. More onwww.nanorobots.cz

3D printing of bioceramics by SLA method

Department: Department of Glass and Ceramics, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials
Theses supervisor: Ing. Jan Macháček, Ph.D.

3D printing of ceramics and bioceramics by the SLA method

Department: Department of Glass and Ceramics, Faculty of Chemical Technology
Theses supervisor: Ing. Jan Macháček, Ph.D.

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This work deals with 3D printing of ceramics and bioceramics using the method of stereolithography (SLA). The focus of the work will be the preparation and characterization of suspensions of ceramic particles and photosensitive resin. For the preparation of ceramic particles it is planned to use the colloidal grinding method and the sol-gel method. The quality of 3D prints will be assessed in terms of microstructure, mechanical properties or bioactivity.

A new generation of materials and approaches for detecting and destroying of pharmaceutical contaminants in the aquatic environment

Department: Department of Solid State Engineering, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials
Theses supervisor: Mgr. Oleksiy Lyutakov, Ph.D.

Ab initio photodynamics in condensed phase: Method development and applications

Department: Department of Physical Chemistry, Faculty of Chemical Engineering

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Computational photodynamics is a fast evolving field. At present, we are able to simulate ultrafast porcesses in medium-sized molecules. This Thesis focuses on developement and applications of photodynamical methods describing light-induced processes in condensed phase. For more information, see http://photox.vscht.cz/

Acid whey and the possibility of its further processing

Department: Department of Dairy, Fat and Cosmetics, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Ing. Ladislav Čurda, CSc.

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Acid whey is difficult treatable by-product of quark and some types of yogurt due to high content of salts and lactic acid. Electrodialysis in combination with other membrane and chromatographic processes is potentially applicable technology for valorisation of acid whey. The aim of thesis is to propose and to verify suitable configuration and conditions of acid whey processing. Application of electrodialysis with bipolar membranes is assumed too. Attention will be also focused on utilization of waste streams, from which could be isolated lactic acid or phosphates.

Acidorezistant forms of prazols for more effective treatment of stomach ulcers

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Study programme: Drugs and Biomaterials

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Prazols are a group of pharmaceutical compounds, which block the production of hydrochloric acid in the stomach through proton pump inhibition. They are the drug of first choice for the treatment of peptic ulcers and other gastrointestinal diseases. However, the molecules are unstable at low pH (such as in stomach), so now, they must be coated in an acidorezistant protective layer that only dissolves at the higher pH of the intestine. The goal of this work will be to prepare novel multicomponent solid forms of prazols with pH-controlled solubility. Through the preparation of salts, cocrystals, coamorphs and solid dispersions, we aim to create solid forms that will have lower solubility in acidic conditions than in basic ones, therefore negating the need for the acidorezistant coating. Samples will be prepared by crystallization or grinding. The properties of the prepared materials will be evaluated regarding purity, stability, crystallinity (XRPD, SEM, DSC, NMR) and pH-dependant solubility.

Active packaging systems

Department: Department of Food Preservation, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Ing. Aleš Rajchl, Ph.D.

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One way how to extend food shelf life is application of active packaging systems based on the positive effects of substances that are part of the packaging material. The study will be focussed on development and preparation of new packaging materials with antimicrobial properties. New materials will be prepared especially by incorporation or immobilization of antimicrobial agents (nanoparticles, bacteriocins, enzymes and spice extracts) into packaging materials. The antimicrobial properties will be long-term tested on selected microorganisms and the test will be made also on food. Basic functional properties (water vapour and oxygen permeability, mechanical and optical parameters) of new packaging materials will be tested too.

Advanced Process Control Focused on Nonlinear and Multivariable Systems

Department: Department of Computing and Control Engineering, Faculty of Chemical Engineering
Theses supervisor: doc. Ing. Jan Mareš, Ph.D.

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Thesis is devoted to the design of new methodology of data processing and control algorithms development for multivariable and nonlinear systems. The work assumes (i) the study of advanced methods of signal analysis, identification, process control algorithms (ii) the proposal of specific control algorithms, (iii) implementation and verification on the real technological system.

Advanced high-entropy alloys with modifiable properties

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: Ing. Filip Průša, Ph.D.

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High entropy alloys belong to a relatively new group of materials which are characterized by the preferential formation of solid solutions instead of intermetallic compounds. These materials exhibit several excellent properties, foremostly high strengths while maintaining sufficient ductility, good corrosion resistance and others. By suitable processing of these alloys, it is possible to achieve further substantial improvement of these already very good properties. The work will be focused on the preparation of new advanced high-entropy alloys combining significantly higher strengths while maintaining sufficient plasticity.

Advanced materials for green hydrogen production

Department: Department of Solid State Engineering, Faculty of Chemical Technology

Advanced methods of monitoring, modeling and control of bioprocesses

Department: Department of Computing and Control Engineering, Faculty of Chemical Engineering
Theses supervisor: doc. Ing. Jan Mareš, Ph.D.

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The quality of process control of biotechnological production processes used in the pharmacy and food industry is often constrained by the limited possibilities of analysis of key process parameters (e.g. cell concentration, growth rate, production rate, etc.). Thesis is devoted to the design of new methodology of data processing and control algorithms development. The work assumes (i) the study of advanced methods of signal analysis, identification, process control algorithms, (ii) the proposal of specific control algorithms.

Advanced plasmonic biosensors: towards the next-generation biomolecular interaction analysis

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Tomáš Riedel, Ph.D.

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Life is associated with myriad of interactions that occur among a large variety of biomolecules. Hence, the understanding of biomolecular interactions and their roles in diseases represents a research goal of paramount importance. This project aims to develop a new plasmonic biosensor-based technology that will enable investigation of biomolecular interactions in complex real-world biological environments, which will advance the field of biomolecular interaction analysis beyond the current state of the art. This project focuses on the development of advanced coating technologies for plasmonic (nano)structure-based biosensors. This relies on precise covalent immobilization of biomolecules in combination with suppression of non-specific interactions from biological media, using state of the art controlled (surface) polymerization techniques and ligation reactions. The resulting biosensor technology will provide new insights into interaction of biomolecules involved in onco-hematological diseases, such as myelodysplastic syndrome and other frequently occurring hematological malignancies. The research will be conducted in collaboration with the Institute of Photonics and Electronics, and the Institute of Heamatology and Blood Transfusion in Prague.

Advanced structures and materials for surface enhanced Raman spectroscopy

Department: Department of Solid State Engineering, Faculty of Chemical Technology

Advances in taste research

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Dr. Ing. Marek Doležal

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The work will be realized mainly in the sensory laboratory, which is equipped according to the relevant international standard ISO 8589. Part of the work will be monitoring the sensitivity of the assessors to selected tastes. Attention will be paid especially to the fatty taste and the effect of fatty acids on the taste perception, the sensitivity of the assessors to the metallic taste of zinc salts and substances that mask individual tastes.

Ambinet air quality in highway tunnel

Department: Department of Gaseous and Solid Fuels and Air protection, Faculty of Environmental Technology

Analysis of batch-to-glass conversion process

Department: Laboratory of Inorganic Materials, Faculty of Chemical Technology
Theses supervisor: Ing. Richard Pokorný, Ph.D.

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The goal of this project targets the analysis of one of the critical batch-to-glass conversion processes – the evolution and collapse of the primary foam at the batch-melt interface. This porous foam layer, which behaves as a form of insulation layer, results from the products of various gas evolving reactions that are being trapped in the primary melt. This project will focus on understanding the foam morphology, the reactions that lead to primary foaming.

Analysis of drugs and counterfeit pharmaceuticals using vibrational and chiroptical spectroscopy

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

Analysis of expression of endogenous retroviruses in human and mouse thymus

Department: Department of Informatics and Chemistry, Faculty of Chemical Technology
Study programme: Bioinformatika
Theses supervisor: Mgr. Jan Pačes, Ph.D.

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Endogenous retroviruses comprise millions of discrete genetic loci integrated into the genomes of all vertebrates. These genetic loci represent past retroviral infections and their ability to integrate into the chromosomal DNA of germ-line cells has endowed retroviruses with the potential to be fixed in the genomes during evolution. Despite the fact that endogenous retroviruses lost this ability to infect other cells, presence of strong promotors in their sequences allows them to express some of their genes in host cells.

In this work, we study gene expression of human and mouse ERVs in the thymus in context of autoimmune diseases. We analyze RNAseq data and compare expression patterns of ERVs in thymus to those in other tissues. Single cell RNAseq data from mTECs is analyzed to obtain detailed expression patterns. Our aim is to assess to what extent are HERVs included in the presentation of self antigens during negative selection of T cells and discuss what are the implications in autoimmune disorders. Results from this diploma work will be integrated into the internationally acclaimed database of endogenous retroviruses HERVd.

Analysis of fuel additives and determination of their content in motor fuels

Department: Department of Petroleum Technology and Alternative Fuels, Faculty of Environmental Technology
Study programme: Energie a paliva

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Motor fuels often contain low concentrations of special fuel additives, which improve their properties. The additives can be commonly added to motor fuels during their production, but they can be also added to motor fuels after basic refinery fuel formulation, mostly in form of additive packages present in premium motor fuels. There are also retail additive packages designed for fuel treatment directly in the fuel tanks of vehicles. The scope of the work is development and optimization of analytical methods designed for fuel additives, for their identification and determination of their content in motor fuels.

Analysis of gene transcription at single cell level

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Dr. Mikael Kubista, Ph.D.

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Single-cell analysis has become an attractive and challenging field of modern molecular biology and medicine, the main goal of which is to study biological questions with single-cell resolution. Such an approach reflects cell heterogeneity and reveals the complex response of an organism to various physiological and pathophysiological stimuli. Reverse transcription PCR (RT-qPCR) and RNA-sequencing (RNA-seq) are the most commonly utilized technologies to analyze single cells. Although both technologies are already routine tools for gene expression analysis, their applications at the single level is still challenging. The aim of the thesis will be to establish and validate efficient workflow for single-cell RT-qPCR and RNA-Seq analysis, including both laboratory and data analysis part. The factors influencing the effectiveness of each step will be monitored and their impact on experimental outcome assessed. The analysis workflow will be applied in the field of neurobiology, with particular focus on the impact of different brain injuries and neurodegenerative diseases on the function of glial cells. The results of the thesis will improve the current understanding of glial cell biology and enhance the reproducibility and effectiveness of single cell RT-qPCR studies.

Analytical strategies for monitoring food additives in foods and food supplements

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Dr. Ing. Věra Schulzová

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Additives, whether of natural or synthetic origin, are deliberately added to foods for technological purposes such as enhancing or maintaining their shelf-life, appearance, consistency, taste or smell. It is a diverse group of substances, especially from the categories of organic and inorganic dyes, sweeteners, aroma intensifiers, preservatives, antioxidants, emulsifiers, etc., differing in chemical structure and properties and their use is controlled by legislation. The topic of the dissertation thesis will include the development and implementation of modern analytical strategies, providing new possibilities in the control of food safety and authenticity. Attention will be paid to the development of multidetection methods using ultra-high-performance liquid chromatography techniques in connection with high-resolution mass spectrometry to determine the widest possible spectrum of additives in various types of foods. Other analytical techniques will be used to identify or semi-quantify some groups of substances such as thickeners, gelling agents and stabilizers in food.

Anomalies of aqueous solutions of simple alcohols and their consequences for industrial applications

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

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Short-chain alcohols (C1-C3) are used as solvents, co-solvents or co-surfactants in many industrial, biotechnological and pharmaceutical applications and, at the same time, they are of great interest due to their atypical physico-chemical properties over a broad range of composition. They exhibit anomalous behaviour when mixed with water, which has been proven to be a result of the ordered formation of water and alcohol molecules. The result is a significant drop in surface tension, multiple increases in viscosity and a dramatic change in bubble surface mobility and bubble coalescence. In these systems, additional added surfactants do not behave in the common manner. At the moment there are only few studies of the overlap of the mentioned anomalies into real chemical or biological processes. The aim of this project is study the behaviour of ethanol-water and propanol-water mixtures in aerated systems. The basis will be the visualization of processes (high-speed camera) and measurement of surface tension, coalescence and interphase viscosity. In three-phase systems, bubble adhesion and droplet spreading will be studied.

Anomalies of aqueous solutions of simple alcohols and their consequences for industrial applications

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Annotation

Short-chain alcohols (C1-C3) are used as solvents, co-solvents or co-surfactants in many industrial, biotechnological and pharmaceutical applications and, at the same time, they are of great interest due to their atypical physico-chemical properties over a broad range of composition. They exhibit anomalous behaviour when mixed with water, which has been proven to be a result of the ordered formation of water and alcohol molecules. The result is a significant drop in surface tension, multiple increases in viscosity and a dramatic change in bubble surface mobility and bubble coalescence. In these systems, additional added surfactants do not behave in the common manner. At the moment there are only few studies of the overlap of the mentioned anomalies into real chemical or biological processes. The aim of this project is study the behaviour of ethanol-water and propanol-water mixtures in aerated systems. The basis will be the visualization of processes (high-speed camera) and measurement of surface tension, coalescence and interphase viscosity. In three-phase systems, bubble adhesion and droplet spreading will be studied.

Application of Advanced Molecular Methods to Reveal Bacterial Mechanisms of Virulence

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Peter Šebo, CSc.

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Over the past few decades, advances in sequencing technologies and bioinformatics have made possible development of new strategies to unravel mechanisms of bacterial virulence. The PhD. candidate will use genome-wide CRISPR/Cas9-mediated screen in human cells to reveal novel mechanisms of Bordetella pertussis and B. bronchiseptica virulence. About 19,050 human genes will be targeted by 123,411 unique gRNA for gene knock-out, and their role in B. pertussis and B. bronchiseptica cell cytotoxicity will be evaluated. Hits will further be clustered and validated.

Application of ICP-MS technique to determine micro- and nanoparticles of metals and metal compounds in food

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Dr. Ing. Richard Koplík

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As inorganic nanomaterials are increasingly applied in diverse human activities, they appear in the environment and could enter the food chain. Moreover, some powdered inorganic compounds (TiO2, SiO2) are still allowed as food additives. Health risks resulting from dietary intake of inorganic nanoparticles have not been unambiguously evaluated yet. To be able to get knowledge about the occurrence and behaviour of these particles in food, we need analytical methods that enable accurate analyses in various food matrices. Inductively coupled plasma mass spectrometry (ICP-MS), namely its special technique of single particle analysis (sp-ICP-MS) is promising and convenient technique for this purpose. The PhD project will be focused on the elaboration of analytical procedures for detection, quantification and particle size determination of inorganic nanoparticles and/or microparticles using sp-ICP-MS. The work will also include an investigation of matrix effects of various food samples on ICP-MS response and development of suitable sample preparation steps. The analytical measurements will be utilised to study the stability of inorganic nanoparticles in food matrices and their behaviour during simulated food digestion.

Application of advanced chemometric procedures for processing of data generated in metabolomic studies

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology

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High Performance Liquid Chromatography coupled with high resolution mass spectrometry (UHPLC-HRMS) finds a wide range of applications for non-target screening / profiling in metabolomic studies, mainly those concerned with biological samples. The doctoral thesis will focus on the implementation of a comprehensive strategy for processing of primary data files before the final statistical analysis and interpretation. The high throughput data processing procedure for routine use should include the detection and 'features' allocation, data modification and reduction, as well as an algorithm to correct time-dependent trends in the data. The developed strategy should be applicable to data file formats generated by instrumentation and software from different manufacturers. Within this interdisciplinary doctoral thesis, several case studies will be performed on sample sets involving various matrices.

Application of advanced nanostructured catalysts in environmental technologies

Department: Department of Environmental Chemistry, Faculty of Environmental Technology
Theses supervisor: doc. Dr. Ing. Martin Kubal

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The dissertation thesis is focused on the development of innovative catalytic procedures in the treatment of wastewaters, air streams or wastes. Within the new project 3deCAT of collaborative industrial research, a lot of series of advanced nanostructured catalysts of metal oxides will be prepared, and consequently, they will be examined at laboratory model conditions in the remove of recent hazardous pollutants from waste streams. These model process simulations will combine modern technologies with heterogeneous catalytic processes, as photochemical, electrochemical, microwave and other advanced processes. In next project phase, promissing catalytic procedures will be developed toward dedicated reactors for these technologies implementation in industrial field.

Application of hydrodynamic cavitation in brewing

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie

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Hydrodynamic cavitation (HC) is related to the phenomenon of formation, growth and collapse of bubbles occurring in an extremely small time interval causing intense release of energy at the point of bubble collapse. The collapse of microbubbles creates shock waves and a temporary increase in pressure and temperature at a large number of locations simultaneously. HK is a simple and energy efficient way to increase the intensity of interfacial phenomena. The aim of the thesis will be to identify technological steps (e.g. mashing, wort boiling, stabilization) in beer production, in which it will be possible to apply HK. Subsequently, the technological steps will be tested using HK and the impact of new processes on the analytical and sensory quality of beer will be quantified. These alternative processes will be compared with the traditional brewing process and the energy requirements for the individual process variants will be compared.

Application of milling and co-milling processes to formulation of poorly soluble drugs

Department: Department of Organic Technology, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials

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Poorly soluble drugs (II and IV classes of biopharmaceutical classification system) represent an important segment of marketed drugs. Improving solubility or at least the drug release kinetics is therefore a continuing challenge, which is approached by many ways on several levels. The milling, nano-milling, and/or co-milling processes of a drug with optional other excipients provide a way how to change the phase composition of the drug, increase the specific surface of drug particles, modify that surface, and also form composite particles. This study should be aimed at the options and possibilities of improving the drug release by all the above mechanisms, especially those related to particle technology. The study should involve both the preparation of particles and their formulation into suitable dosage forms and seek optimized approaches bringing the best performance while complying with the requirements of industrial manufacturability of the formulation.

Application of non-thermal plasma in modification of polysaccharide materials

Department: Department of Carbohydrates and Cereals, Faculty of Food and Biochemical Technology

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The doctoral study is focused on the development of ecologically friendly procedures usingnon-thermal plasmato modify properties of polysaccharide materials. Polysaccharides from selected plants or fungi will be isolated by microwave-assisted extraction after removing low molecular compounds, proteins and fats. Extracts with high content of polysaccharides will be used for development of novel functional polysaccharide films that can increase the added value of conventional wound dressing films. These films will be impregnated by extracts rich in health-promoting substances or skin care drug using non-thermal plasma. A broad spectrum of analytical methods and instruments will be applied to characterize the properties of obtained products. All steps will be monitored by FTIR spectroscopy. Structure of polysaccharides will be characterized by determination of carbohydrates composition, type of glycosidic bonds and molecular weights. The chromatographic method as HPLC and size exclusion chromatography with triple detection will be applied. The degree of modification of polysaccharide material will be monitored by spectroscopic methods. The mechanical properties of polysaccharide films will be tested.

Applications of the corona discharge microbicidal effects

Department: Department of Physics and Measurement, Faculty of Chemical Engineering

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Non-thermal plasma seems to be a possible alternative to the common disinfection and sterilization methods. Scope of this work are the corona discharges and their possible practical applications for the decontamination of surfaces and liquids and as a therapeutic method in medicine. Moreover, this work covers also the investigation of microbicidal effects of corona discharges to the bacteria, bacterial spores, yeast, fungi and other microorganisms.

Artificial sweeteners removal in wastewater treatment processes

Department: Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology

Assessing of minor plant raw materials quality

Department: Department of Food Preservation, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Ing. Aleš Rajchl, Ph.D.

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Minor plant raw materials are often neglected, due to low production volume, and sufficient attention is not paid to their quality. The aim of this work is to assess the quality of selected minor raw materials of plant origin. The work will be also focused on development of new analytical methods for evaluating the quality of studied materials.

Atomic modelling of silicate glass structure

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

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Glass structure can be described by means of various structural quantifiers (radial distribution function, time-space correlation functions, coordination numbers, Q-motifs, rings, etc.). The quantifiers are accessible by means of computer simulation, e.g. Molecular Dynamics. The work aims to theoretical description of glass structure, focusing to medium-range order and comparison between bulk and surface structures.

Authenticity testing of fruit and vegetable products

Department: Department of Food Preservation, Faculty of Food and Biochemical Technology

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Nowadays, there are many procedures and methods available for the detection of adulteration of fruit and vegetable products. However, the diversity of botanical species, varieties, cultivation and processing technologies, and geographical particularities increases the requirements for speed, complexity and reliability of procedures for their authenticity testing. The project aims to 1) summarize the available conventional and advanced instrumental methods suitable for targeted and non-targeted analysis for various types of adulteration, 2) critically evaluate the reliability of selected markers of authenticity / adulteration from the perspective of the natural variability of their content in the raw materials, the impact of formulations and processing conditions, 3) existing databases complementation. Experimental work will be carried out in cooperation with selected testing laboratories and canning factories and will implement recent methods of food analysis (chromatography and isotopic methods, mass spectrometry).

Automated study of photochemical mechanisms

Department: Department of Physical Chemistry, Faculty of Chemical Engineering

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The thesis will focus on mechanisms of organic reactions in both the ground and excited states. Ab initio techniques and methods of ab initio molecular dynamics will be used. It is anticipated that new computational techniques will be developed, in attempt to automatize the search for key aspects of reaction mechanisms.

Beneficial systemic effects of adipose tissue metabolism

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: MUDr. Jan Kopecký, DrSc.

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In all mammals including humans, two types of adipose tissue are recognized, white and brown adipose tissue (WAT and BAT, respectively), which are engaged in two major distinct and opposite functions: energy storage (in WAT) and energy dissipation (in BAT). Our recent studies are focused on “healthy adipocytes” in WAT, which are relatively small fat cells endowed with a high capacity for mitochondrial oxidative phosphorylation, triacylglycerol/fatty acid (TAG/FA) cycling and de novo lipogenesis. The “healthy adipocytes” could be induced in WAT by various factors that need to be better characterized. “Healthy adipocytes” provide beneficial local and systemic effects that could contribute to “metabolically healthy” obesity. The role of the metabolic features of “healthy adipocytes” in the systemic effects of WAT needs to be better characterized. The aim of this PhD project is to characterize adipose tissue metabolism in rodent models in stimulated and inactivated state (such as during cold exposure, in dietary-obese mice). In order to assess rate of the above mentioned metabolic processes, stable isotope labeling of newly synthetized lipids and metabolites will be used. Involvement of particular regulatory metabolic pathways will be evaluated using adeno-associated viruses-driven overexpression of certain proteins both in vivo and in cell culture model. The basic scholarship will be eventually supplemented by salary covered by grants of the department.

Bioaccesibility of antimony in urban traffic-loaded areas

Department: Department of Solid State Chemistry, Faculty of Chemical Technology

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Antimony (Sb) has not been well known and widely cited toxic elements yet, but it can posed a serious environmental risk in future. Sb compounds are used in industrial sphere as fire-resistant agents, hence the increased Sb concentration represents a challenge for geochemical and material research. The aim of this work is to study the stability of Sb compounds incoming to the environment and their subsequent behaviour in the soil-groundwater-surface water system. Geochemical properties of antimony and arsenic will be compared in term of their environmental stability and bioaccesibility. Next part of the work will be focused on the monitoring of selected heavily contaminated locality.

Bioactive coatings promoting spontaneous endothelialization of vascular vessel grafts

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology

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The surface of biomaterials that are in long-term contact with blood (e.g., vascular prostheses, stents) triggers inflammatory processes of the organism leading to activation of the coagulation cascade and formation of thrombi, and to a subsequent graft failure. The aim of this work is the development of coatings that would suppress activation of the coagulation cascade and immune response of the organism, while actively encouraging the formation of endothelium on the surface of vascular prostheses after their implantation. One approach will be based on coating the internal surface of a synthetic and decellularized vessel with a fibrin network that will be modified by bioactive molecules such as heparin, growth factors, oligosaccharides, and other bioreceptors specifically promoting the adhesion of progenitor endothelial cells. An alternative approach will be based on suppressing the unwanted body reactions by means of so-called polymer brushes and their subsequent functionalization by the above-mentioned biomolecules. We assume that, after implantation, heparin will suppresses the coagulation cascade, while the other bioactive molecules will promote endothelization of the graft by capturing progenitor endothelial cells from blood.

Biochar Production, Characterization and Utilization

Department: Department of Power Engineering, Faculty of Environmental Technology
Study programme: Energie a paliva

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Biochar is essentially charcoal, i.e., a carbon-rich porous material. The work will be focused on the production, characterization and utilization of biochar. The properties of biochars produced from different types of biomass will be characterized in cooperation with the institutes of the Academy of Sciences of the Czech Republic, primarily according to the European Standard EBC (European Biochar Certificate), international standardization IBI (International Biochar Initiative Biochar Standards), and the forthcoming European legislation. The additives will be further analysed using specific analytical methods (XRD, XRF, SEM-EDX, XPS, FTIR, Raman spectroscopy, NMR, porosimetry, thermal analysis methods etc.). The use of the biochar will be explored by laboratory tests and real applications in collaboration with CULS. The partners of the project are, besides the mentioned research institutions, also private farmers, the Botanical Garden in Prague, and the substrate producers.

Biodegradable polymer systems for medical applications

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: RNDr. Miroslav Šlouf, Ph.D.

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Biodegradable and biocompatible polymer systems show numerous applications in both human and veterinary medicine. We have recently developed and patented multiphase polymer systems based on thermoplasticized starch (TPS), polycaprolactone (PCL), titanium dioxide based nanoparticles (TiX) and antibiotics (ATB). Morphology and properties of these systems can be adjusted by their composition and targeted phase structure modification during the processing. TPS/PCL/ATB systems can be employed in treatment of strong local infections such as osteomyelitis. The project comprises preparation of the above systems (by melt mixing), optimization of their phase structure (targeted modification of processing conditions), characterization of their morphology (electron microscopy), properties (macro- and micromechanical properties), and participation in medical tests in collaboration with local hospital (FN Motol; treatment of local infects, biodegradability).

Biodegradable polyurethane foams from renewable raw-materials: synthesis and characterization

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Hynek Beneš, Ph.D.

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In recent years, considerable attention has been paid on polyurethanes (PU) containing structural biodegradable units of polyester-polyols. The polyols are thus often tailored with respect to a final application, while commercially available aliphatic polyisocyanates are often used as the second raw material for polyaddition. This approach enables to prepare biodegradable linear and thermoplastic PU (TPU), whereas the more-demanded crosslinked PU, biodegradable PU foams, cannot be produced due to low reactivity of aliphatic isocynates and/or ecotoxicity of their aromatic analogs. The PhD topic is focused on alternative synthetic routes of PU foams utilizing renewable (bio-based) raw-materials for synthesis of polyols and isocyanates and non-isocyanate preparation of PU foams (NIPU). The experimental work will include a synthesis of new types of monomers and PU foams and their structure-related characterization. Degradation behavior of the produced PU foams will be studied with respect to foams’ composition and structure. Biodegradation tests will be carried out in cooperation with Institute for Environmental Studies, Charles University in Prague. The PhD theme is suitable for graduates in Chemistry, especially macromolecular and organic chemistry.

Bioengineering and pharmaceutical application of liposomes and their composites

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Study programme: Drugs and Biomaterials

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Liposomes and related particles (exosomes, supported lipid bi-layers, magneto-liposomes, liposome aggregates) have many intetesting applications especially in drug encapsulation and drug delivery. The aim of this project is to explore liposome-based systems as miniature reactors for remotely controlled drug delivery and drug synthesis from pro-drugs. The encapuslation of multiple actives or their precursors, characterisation of release kinetics, stability, interaction with biological substrates in vitro and in vivo will be investigated. In particular, the incorporation of magnetic nanoparticles into liposome structures for sensing and remote control capability, and the embedding of mesoporous silica particles into liposomes in order to increase the drug loading capacity, will be explored along with processes for their fabrication. As a novel method of permeability control, the incoporation of ladderanes into liposomes will be investigated.

Biogenesis and degradation of yeast transport systems

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: RNDr. Hana Sychrová, DrSc.

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The aim of the PhD thesis is to find, with the use of molecular biology and biochemistry methods, proteins that participate in biogenesis, degradation and activity regulation of transporter systems in the yeast plasma membrane. Further, the mode and conditions of interaction between those proteins and transporters will be studied. Obtained knowledge will contribute to our understanding of mechanism of adaptation of yeast cells to changing environmental conditions.

Bioinformatic studies of G-quadruplex biochemical specificity

Department: Department of Informatics and Chemistry, Faculty of Chemical Technology
Study programmes: Bioinformatics, Bioinformatika
Theses supervisor: Edward A. Curtis, Ph.D.

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G-quadruplexes are noncanonical nucleic acid structures thought to play widespread biological roles. The algorithms currently used to identify G-quadruplexes in genomes use models in which structurally distinct classes of G-quadruplexes, such as those with different strand polarities, are grouped together. However, emerging evidence suggests that these models are too general because in some cases they cannot distinguish G-quadruplexes with biochemically distinct functions. To address this limitation, here we will perform a series of functional screens using G-quadruplex libraries in which parameters such as tetrad number, loop length, and loop sequence are systematically varied. The data from these screens will be used to generate sequence models for G-quadruplexes specific for particular functions. The genomic distribution of these classes of G-quadruplexes will then be analyzed with respect to annotated genomic features such as transcription start sites. We hypothesize that this analysis will reveal genomic associations that are currently undetectable due to noise from the more general G-quadruplex models currently used.

Biological active compounds and metabolism of entomopathogenic fungi of the genus Beauveria and Cordyceps

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: RNDr. Petr Šimek, CSc.

Annotation

Cordyceps and Beauveria fungi are among the pathogens of important insect pests, such as the spruce bark beetle, Ips typographus. At the same time, these fungi produce a number of very interesting biologically active substances, especially cyclic peptides, nucleosides, beta-glucans and others, which strengthen the immunity of the human organism, its revitalization and prevent processes of aging and development of neurodegenerative diseases. Cordyceps fungi are therefore used in the form of dietary supplements as medicinal fungi, especially in Asian medicine. However, there is still little knowledge about these unique natural substances and the metabolism of these species. The aim of the dissertation thesis is to map and compare the natural compounds, especially secondary metabolites in both known and newly isolated species of both fungal genera, to determine their structures and to obtain basic knowledge of their metabolism during entomopathogenic process in insect hosts. Financial support: project TP01010022 (2020-2022).

Biological active compounds for cancer theranostics

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Tomáš Ruml, CSc.

Annotation

The main topic of the thesis is the study of new fluorescent and photosensitive derivatives of antimitotic poisons for application in teranostic. In the first phase, colchicine, a secondary metabolite of plants occurring in the lily family, will be used. It is known primarily for its high toxicity and therapeutic use in the treatment of gout and familial Mediterranean fever. The biological effects of newly prepared derivatives of colchicine and other natural substances with antimitotic effect on tumor cell lines will be studied with a focus on rapidly proliferating types of tumor cells. The data will be compared with non-tumor cells and the selectivity of newly prepared derivatives for tumor cells will be studied. Cyto- and phototoxic properties of these compounds for possible use in imaging and photodynamic therapy of cancer will be determined. In addition, the mechanism of action of these agents, the intracellular localization, the potential for inducing cell cycle arrest and the type of cell death will be verified.

Biologically active compounds of plants and their changes during processing and storage

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Dr. Ing. Věra Schulzová

Annotation

Plant biologically active compounds may have both positive and negative biological effects. Biologically active compound levels are dependent on plant species or growing conditions, but they are also influenced by storage and processing conditions. Modern analytical methods, based mainly on the technique of ultra-performance liquid chromatography coupled with high resolution mass spectrometry detection, are applied for monitoring these compound levels and the assessment of their stability. For the assessment of the authenticity of vegetable raw materials, metabolomic fingerprinting technique with application of sophisticated statistical methods for the evaluation of obtained data is applied.

Biologically active substances in foods that reduce oxidative and carbonyl stress of organism

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Dr. Ing. Karel Cejpek

Annotation

The subjects are components of food and nutraceuticals that are able to reduce the redox potential and/or the amount of reactive carbonyl compounds produced during sugars’ transformation. The components are reducing agents and other antioxidants, and agents capable to scavenge reactive carbonyl species (RCS) both in food and in vivo. RCS are formed during non-enzymatic browning reactions in food (Maillard reaction) or in vivo (glycation) as well as lipid oxidation. The goal will be to find the foods and nutraceuticals that significantly suppress the stress promotors and to describe the substances that cause this effect.

Blood plasma individual variability and pathophysiology and their influence on the interactions with synthetic antifouling surfaces

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology

Annotation

Early biomarker detection improves treatment outcomes, survival and quality of life. In particular, optical biosensors are promising technology for early diagnostics: minimally invasive procedures (plasma, saliva), rapid and sensitive detection, low sample consumption. The main pitfall of optical biosensors is the inability to differentiate a specific signal from an interfering signal caused by adsorption of particularly proteins during the contact of artificial surfaces with biological media (fouling). Fouling can result in complement or coagulation initiation, etc. It has prevented the advance of biosensors into clinical applications. In principle, fouling is influenced by individual biological variability and pathophysiology – with a few exceptions, these factors and their influence are unknown although they play a key role in clinical applicability. The aim of the project is to identify factors caused by biological and pathophysiological variability of blood plasma that influence clinical applicability of blood contacting devices. To find relationship between individual samples, and to design pre-treatment protocols eliminating those factors.

Catalysts for alkaline energy conversion devices

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: Ing. Jaromír Hnát, Ph.D.

Annotation

Alkaline energy conversion technologies represent one of the promising ways to increase the utilization of the installed renewable sources of energy. The advantage of the alkaline technologies lies in the possibility to avoid the necessity of the utilization of the Pt-group metals as catalysts for electrode reactions. On the other hand, the intensity of these technologies is generally lower when compare to alternatives. This work focuses on the synthesis and optimization of the new catalysts, their testing using standard procedures and under the real conditions of the energy conversion devices.

Catalytic synthesis of biodegradable polymers based on carbon oxides

Department: Department of Polymers, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: doc. Ing. Jan Merna, Ph.D.

Annotation

The aim of the work is to synthesize catalytic systems for carbon monoxide conversion to biodegradable polymeric materials. In the first phase, the main attention will be focused on reaction of carbon oxides with epoxides leading to polyesters. Stereoregularity of the obtained polymers will be evaluated and their properties will be compared with highly stereoregular natural polymers. The work has interdisciplinary character with focus on organometallic and polymer synthesis followed by study of biological degradation of prepared materials.

Catalytic transformation of methane to higher value products

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Dr. Ing. Vlastimil Fíla

Annotation

The high attention on the processes of transformation of methane (C2, C3 hydrocarbons eventually) from natural gas or biogas to higher value products is paid at present time. The processes such as non-oxidative catalytic methane aromatization, selective oxidation to methanol or dimethyl ether are used. The suitable catalyst for chosen process will be developed. The effect of the reaction conditions, catalyst carrier and formation of active phase on catalyst on the methane conversion, catalyst stability and yield of products will be studied.

Cathepsin proteases in biomedicine

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: RNDr. Michael Mareš, CSc.

Annotation

The project is focused on proteolytic enzymes of the cathepsin type that are critically involved in pathologies and are therapeutic targets. Cathepsins of human origin and those from pathogens and parasites will be investigated. The aim of the project is to analyze the structure and function of cathepsins and develop novel inhibitory molecules for their regulation. The research in the field of biochemistry and molecular biology employs the following main approaches: functional proteomics and chemical genomics, recombinant protein expression, enzymology, protein crystallography, and molecular modeling.

Cell biology of heavy metals in macrofungi and fungal microbiomes and associated microflora in hyperaccumulating species

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Study programmes: Mikrobiologie, Microbiology
Theses supervisor: prof. Ing. Pavel Kotrba, Ph.D.

Annotation

Fungi play a fundamental role in the environmental element cycling and efforts are being made to understand the molecular mechanisms underlying the fungal ability to accumulate high concentrations of metals and metalloids. It is known that fungi are associated with [symbiotic] prokaryotic populations – however, the interactions in the fungus-metal-prokaryote system are being quite overlooked. The PhD thesis aims at ‘metallomic’ studies in selected fungi on the molecular level and investigation of associated prokaryote taxa. The fungi of interest are hyperaccumulating macrofungal species of Cystoderma, Amanita and Agaricus genera. Employing modern molecular biology, bioinformatics and microbiology approaches, the metal tolerance genes of fungi and prokaryote diversity and community composition in the sporocarps and mycospheres will be investigated to obtain complex and new information about the mechanisms involved in the handling of the excess heavy metals and about the interplay between hyperaccumulating fungi and associated microflora in natural environments. The research is funded by Czech Science Foundation (project 19-06759S) with a position available for PhD student.

Cellulose acetate base motion picture films

Department: Department of Chemical Technology of Monument Conservation, Faculty of Chemical Technology
Theses supervisor: Ing. Vítězslav Knotek, Ph.D.

Annotation

Cinematographic films based on a cellulose triacetate base form a considerable part of collections in film archives. Films made in the period from the 1950s to the 1980s include a soundtrack in the form of a magnetic strip. The cellulose triacetate base is prone to degradation manifesting shrinkage, twist, and embrittlement. These dimensional changes can lead to errors in playing a magnetic soundtrack and difficult digitization. This work will focus on the study of cellulose triacetate film degradation processes and their influence on the magnetic soundtrack. One of the goals will be to develop methods for temporarily suppressing the symptoms of the degradation of the base and to determine the effect on the soundtrack. Furthermore, the possible catalytic effect of the magnetic soundtrack on the degradation of the base will be investigated.

Cellulose and modified cellulose based materials for bioapplications

Department: Department of Solid State Engineering, Faculty of Chemical Technology
Theses supervisor: Ing. Ondřej Kvítek, Ph.D.

Annotation

Cellulose is the most abundant polymer on Earth and as a biopolymer it is a good candidate for application in tissue engineering. In plants and bacteria cellulose is produced at the interface of the environment and the cell membrane and it forms the extracellular matrix. The structure of cellulose can be therefore used for cell culturing in an environment that is similar to their natural state. The disadvantage of cellulose for tissue engineering is its non-degradability. Cellulose derivates or nanocellulose loaded with enzymes promoting its controlled hydrolysis expand application of cellulose inside the human body where the implanted tissue carrier dissolves after a new tissue is created. This work is aimed on preparation and characterisation of modified cellulose and nanocellulose materials for tissue engineering application.

Ceramics with controlled properties in CaO-Al2O3-SiO2 system

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

Annotation

Ceramic materials in the CaO-Al2O3-SiO2 system are used for many applications. Materials with controlled delay in the area of small length changes during firing are possible to prepare by suitable composition of raw materials and their subsequent heat treatment. The work will be focused on the prediction of mixtures behavior in the field of the area of small length changes and characterization of final products.

Changes of phytocannabinoids and other biologically active compounds during cannabis processing

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology

Annotation

During processing of cannabis-based products, the spectrum of phytocannabinoids and other biologically active compounds may largely vary due to various physico-chemical and biochemical factors The doctoral thesis will focus on the study of changes of both volatile and non-volatile metabolome components induced especially by elevated temperature, attention will be aslo paid to the influence of oxygen access or pH value. For the realization of experiments, advanced instrumental procedures employing tandem high resolution mass spectrometry (HRMS/MS) will be employed, generated data will be processed using multidimensional statistical methods. The spectral database of both targeted compounds and their transformation products will be established.

Characteristics of lactic acid bacteria for fermentation of plant matrices

Department: Department of Dairy, Fat and Cosmetics, Faculty of Food and Biochemical Technology

Annotation

At present, the market for alternative fermented products based on plant substrates is developing more and more significantly. Many consumers prefer vegetarian or vegan food. The question is whether plant matrices can be as good a carrier for probiotic bacteria as fermented dairy products. In this work, isolation and characterization of new strains of lactic acid bacteria (LAB) occurring on different plant matrices will be performed. Pure plant-based culture media for vegan products will be developed. The influence of different culture conditions and media and their components (eg. vitamin B12) on growth and functional properties of LAB (protective and probiotic properties) will be investigated. Analysis of antimicrobials will be performed with a focus on phenolic substances occurring in these types of foods and their effect on BMK will be investigated. The aim of this work will also be the development of a functional vegan product with probiotics, where their viability during long-term storage will be monitored.

Chemical and biochemical transformation of sucrose for production of other sugars and sugar alcohols

Department: Department of Carbohydrates and Cereals, Faculty of Food and Biochemical Technology

Annotation

Sucrose is a very good raw material for chemical and biochemical reactions. The sugar industry produces it in large quantities in a crystalline form of high purity, its production is stable and traditional, long-term storage and thus becomes a relatively cheap and well-defined reactant or substrate for further transformations. The work will be focused on the search for catalyzed chemical, enzymatic or biological transformations of sucrose to common (glucose, fructose) or rare saccharides (psicose, tagatose, allosa, altrose, etc.) and sugar alcohols (mannitol, xylitol, erythritol, etc.). Various inorganic catalysts, enzyme groups, and microorganism strains will be used for the transformation to achieve high yield and concentration in the reaction mixture. The product will be isolated by membrane and chromatographic techniques and by crystallization.

Chemical or enzymatic labeling of epigenetic nucleobases in DNA

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Michal Hocek, DSc.

Annotation

New biocompatible chemical or enzymatic reactions will be studied and developed for modification of epigenetic bases (e.g. 5hmC, 5hmU, 5fC etc.). These reactions will be then applied in labeling, imaging or sequencing of the epigenetic nucleobases in DNA. References: 1. Vaníková, Z.; Janoušková, M.; Kambová, M.; Krásný, L.; Hocek, M. "Switching transcription with bacterial RNA polymerase through photocaging, photorelease and phosphorylation reactions in the major groove of DNA" Chem. Sci. 2019, 10, 3937-3942.

Chemical synthesis of hypermodified oligonucleotides and DNA

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Michal Hocek, DSc.

Annotation

Chemical synthesis of hypermodified oligonucleotides and DNA stretches will be studied and developer using novel base-modified nucleoside phosphoramidites. The modifications will include e.g. hydrophobic substituents, heterocycles or sugars. In some cases, orthogonal protecting group strategy will have to be developed. Hybridization and folding of these oligomers will be also studied as well as their interactions with proteins and biological activity.

Chemiresistors based on nanostructured oxides: detection of gaseous analytes with various characteristic groups

Department: Department of Physics and Measurement, Faculty of Chemical Engineering
Theses supervisor: prof. Ing. Dr. Martin Vrňata

Annotation

Although the first functional chemiresistors with oxidic sensitive layers were constructed in 1960's and since 1990's they are commercially produced in large series, their research and development is far from being completed. While the chemical composition of the sensitive layers has been more or less optimized, the boom of nanotechnologies in recent years brings new challenges how to improve chemiresistors by tuning morphology of their sensitive layers. The highest impact has the fact that the geometric dimensions of the oxidic nanostructures are comparable with Debye length of given material. Such circumstance enables us to approach the concept of "molecular switch", when just one molecule of the analyte switches on/off the conducting channel in the sensitive layer. This thesis will be focused on synthesis of oxidic nanostructures (preferably by hydrothermal methods) and on measurement of their response to certain "model analytes" (oxidizing gas, reducing gas, Lewis acid or base, variable molecular dipole-moment). The analytes will be selected according to such criteria, so that the obtained results can be generalized.

Chemistry of inorganic analogues of graphene - nanostructures based on pnictogens

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

Annotation

The thesis is focused on the covalent and non-covalent interactions of layered pnictogens in order to improve their long-term stability. Mono- and multi-layer materials will be prepared by optimized mechanical exfoliation processes. For non-covalent interactions, substituted delocalized organic systems will be tested and their effect on material transport properties will be studied. The covalent functionalization will be performed using radical reactions. Finally, preparation of functional microelectronic devices based on FET transistors and photodetectors will be studied and optimized.

Chemistry of oxidised thiacalixarenes

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: prof. Ing. Pavel Lhoták, CSc.

Annotation

Design and synthesis of novel macrocyclic systems based on the oxidised thiacalixarenes, study of their chemical behaviour, basic chemical transformations, and conformational preferences, the application of quasi-thiacalixarene skeleton in the design of novel receptors for the recognition of ions and/or neutral molecules.

Chemo-Enzymatic and organic synthesis of C-galactofuranosides

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: Ing. Kamil Parkan, Ph.D.

Annotation

Glycoconjugates are critical molecules involved in many biological phenomena and more particularly in cellular communication and molecular recognition through their saccharidic part. Their natural occurrence and relevant biological role contributed to the strong emergence of glycosciences in the last 20 years. Most of the carbohydrates found in Nature present a six-membered ring. Their five-membered ring analogs, named furanoses, while less abundant, could also be seen, particularly in some microorganisms, often pathogenic, like Mycobacteria, Leishmania or Aspergillus. Since furanosides are not biosynthesized by mammals, they are particularly suitable targets to better understand their role but also as antiparasitic agents. Different families of galactofuranosyl derivatives have already been screened against strains of Mycobacteria or Leishmania. The team of Rennes have for example shown that an alkyl furanoside, the octyl β-d-galactofuranoside was able to inhibit the proliferation of both Mycobacteria and Leishmania at a concentration of 850 µmol.L-1 and 9 µmol.L-1 respectively. Nevertheless, the activity of this glycofuranolipids quickly dropped because of the chemical or enzymatic hydrolysis of the O-glycosidic bond. To overcome this problem, we wish to swap the O-glycosidic bond with more stable mimetics like the C-glycosidic one. The goal of this double degree Ph.D. project is development of two strategies in parallel to synthetize these C-glycosides: one based on a cross-coupling methodology developed in our laboratory at UCT Prague and the other one centered on a biocatalyzed C-glycosylation in aqueous media developed by Dr. Laurent Legentil at ENSC Rennes. The resulting C-glycosides will then be evaluated against their bacteriostatic properties on two microorganisms, Mycobacteria smegmatis and Leishmania torentulae, the non-pathogenic analogues of Mycobacteria tuberculosis and Leishmania donovani.

Chiral plasmonics and its applications

Department: Department of Solid State Engineering, Faculty of Chemical Technology
Theses supervisor: Mgr. Oleksiy Lyutakov, Ph.D.

Cluster-based biomaterials for photodynamic applications

Department: Department of Solid State Chemistry, Faculty of Chemical Technology
Theses supervisor: Kaplan Kirakci, Ph.Dr.

Annotation

The singlet oxygen is a reactive oxygen species with cytotoxic effects and is typically generated by energy transfer from the excited triplet states of a photosensitizer to molecular oxygen. Tumor cells or bacteria cannot develop resistance against singlet oxygen, therefore it is exploited in the photodynamic therapy of cancer or photoinactivation of bacteria. The luminescent octahedral molybdenum cluster complexes [Mo6I8L6]2- are efficient photosensitzers of singlet oxygen upon visible light or X-ray irradiation. The goal of the doctoral work will be to prepare these complexes and design nanoparticles or films for photodynamic therapy or antibacterial applications. An important aspect is to delineate relationship between morphological and photophysical properties of the prepared materials and their biological activity. The work includes: • solid-state synthesis of starting cluster compound Mo6I12 • preparation of Mo6 complexes • characterization of the prepared Mo6 complexes (NMR, ESI-MS, CHN analysis) • preparation of Mo6-based nanoparticles and surface functionalization • preparation of Mo6-based bactericidal films • morphological characterization of the prepared materials (SEM, TEM, XRD, DLS) • photophysical characterization

Combination of surface enhanced Raman spectroscopy and artificial neural networks for analysis of complex biological samples

Department: Department of Solid State Engineering, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials
Theses supervisor: Mgr. Oleksiy Lyutakov, Ph.D.

Comparison of biochemical markers in patients with different progression of Alzheimer's disease

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology

Annotation

The dissertation is focused on the development of a new biochemical methodology for the detection of progression degree of Alzheimer's disease. The methodology consists in detecting changes in the plasma peptide profile in several groups of patients with varying degrees of disease development and healthy individuals by mass spectrometry. For selected markers, their relative amounts will be determined and verified if they are characteristic for a particular stage of progression.

Competition of different Fusarium species on cereals under changing environmental conditions

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Study programme: Mikrobiologie

Annotation

Fusarium fungi are important phytopathogens. They cause losses in yield and quality of agricultural production. The species studied are mainly those that parasitize on cereals and their products. They produce harmful mycotoxins, the occurrence of which in food and feed is regulated and controlled. Different species differ in their preferences for living conditions, the production of different types of mycotoxins, which they use to colonize the host and compete with each other for living space. Under the current climate change conditions and the associated spread of new (often invasive) species, the aggressiveness of individual species needs to be evaluated to assess the possibility of crop protection and production. In the framework of the dissertation, it is necessary to investigate the basic processes that occur during simultaneous attack of the host. (1) existing knowledge about genome, virulence genes and biosynthetic pathways of phytopathogen mycotoxins from transcriptomic and genomic studies will be used, (2) effective procedures for monitoring phytopathogen development and competition of species based on qPCR, ddPCR or NGS will be proposed, (3) knowledge about competition between different molds determined and (4) proposed application of acquired knowledge for practical use suggested.

Complex upgrading of biogas including membrane separation and bioconversion of separated carbon dioxide with external hydrogen

Department: Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology

Annotation

The topic of this work is to increase energy utilization of biogas from organic waste processed by anaerobic fermentation technology. The conversion of biogas into biomethane, that is more energy-efficient, is based on the removal of CO2 by means of membrane separation. The biological conversion of separated waste CO2 into biomethane using external hydrogen also increases the overall energy yield from the waste. The conversion takes place in a bioreactor constructed as a trickle packed column with biofilm of hydrogenotrophic methanogens. The bioreactor is included in the full-scale technological line of biogas treatment and it is necessary to verify and optimize the technological parameters of the bioreactor and process efficiency. The main monitored parameters of operation are pressure, temperature, gas inflow into the system and volumetric loading of the bioreactor by gases. Also important is the economic and social evaluation of the benefits of biogas treatment to biomethane and bioconversion of CO2 to biomethane at the application site.

Composite materials/ coatings based on TiO2 for photocatalytic processes in gaseous phase

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: prof. Dr. Ing. Josef Krýsa

Annotation

Air polution represents a significant problem which can be conveniently solved by an application of photocatalytic processes. Therefore the aim of the present thesis is the preparation of new photocatalytically active composite materials based on TiO2 and the determination of their adsorption and photocatalytic properties. The goal is to get the material having at the same time good adsorption properties and at the same time a high ability to remove unwanted volatile substances in the air. Part of the work will use the standard ISO tests for monitoring the kinetics of oxidation reactions (NOx, VOCs) on the surface of the prepared photocatalysts. The important part is the characterization of materials/coatings (XRD, SEM, BET, Raman spectroscopy) and further development of methods allowing the testing of functional properties of the prepared materials/coatings in air treatment.

Comprehensive analysis of Monascus yellow and orange pigments for bioactivities

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie
Theses supervisor: prof. Dr. Ing. Petra Patáková

Annotation

The fungus Monascus belong to the ascomycetes, and the species Monascus purpureus is widely used in Asian countries as a microbial source of pigments. The polyketides produced by Monascus are therefore better known as food dyes and their biological activity has so far been studied extensively. The main goal of the work is to study in more detail various aspects of biological activity (e.g. antimicrobial, anticancerogenic, antidiabetic or antioxidant effects) of pure yellow and orange pigments or defined blends of Monascus metabolites and to focus on activities that have never been tested such as inhibitory effect on spore-forming bacteria. In addition, the synergistic effect of the pigments with standard antimicrobial drugs or antibiotics will also be tested. Thus, the proposed work may be useful in combating antibiotic resistance as a major obstacle in the treatment of infections. The work will also optimize the culture conditions for the overproduction of the desired, especially yellow pigments, in order to achieve their efficient production without simultaneous production of mycotoxin citrinin, which can be produced by certain strains of Monascus under certain conditions. Attention will also be paid to the development of a simple method of pigment isolation.

Comprehensive analytical methods and bioinformatics tools for metabolomics studies

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Ing. Tomáš Čajka, Ph.D.

Annotation

Untargeted metabolomics and lipidomics methods focus on the analysis of all the detectable metabolites in a sample, including chemical unknowns. Coupling liquid chromatography to mass spectrometry (LC-MS) is the preferred technique in metabolomics and lipidomics permitting effective compound separations and detection. One of the most challenging aspects of metabolomics research is the identification of unknown metabolites. Unknown metabolites represent up to 80% of all detected signals from untargeted mass spectrometry-based profiling. Such a big obstacle in biomedical and biology research hinders meaningful biochemical and pathway interpretations. The aim of the PhD project is (i) to increase the coverage of spectral libraries used for metabolite annotation, (ii) to apply and optimize in-silico software for prediction of ‘unknown’ metabolites, and (iii) to evaluate and apply new bioinformatics tools for visualization and interpretation of the data obtained within metabolomics and lipidomics studies. The work will be conducted at the Institute of Physiology CAS and financially supported by various grants (GACR, MSMT, AZV).

Computational electrochemistry: Developement of new methods and applications

Department: Department of Physical Chemistry, Faculty of Chemical Engineering

Annotation

The Thesis focuses on developement of new apprroaches for charge transfer modelling. The work includes both the charge transfer between molecules as well as the charge transfer between a molecule and electrode. Modern approaches based on ab initio molecular dynamics will be used. For more information, see http://photox.vscht.cz/

Computer modelling of non-thermal plasma and electrical discharges

Department: Department of Physics and Measurement, Faculty of Chemical Engineering

Annotation

Scope of this work is the computer modelling of non-thermal plasma in electrical discharges. It may help to clarify the plasma-chemical reactions in discharges and the spatial distribution of generated particles. Work deals with the issue of plasma physics, computer modelling, possible method for the modelling of selected problem and comparison with the experiment. It is also possible to combine this work with the investigation of bactericidal effects of plasma or the interaction with organic structures.

Computer simulations of critical phenomena

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

Annotation

This work addresses the problem of critical phenomena using computer simulations. The critical phenomena are ubiquitous in nature and are of great interest not only in natural sciences but also in everyday situations such as social networks. The characteristic features of the critical phenomena is a presence of strong fluctuations, long-ranged correlations and system self-similarity, which thus exhibits signs of deterministic chaos. All these features make any theoretical attempt for a description of such systems a daunting task. Computer simulations are thus a vital tool which can be used both for a description of critical systems or as a "referee" assessing predictive capability of approximative theories.

Control of membrane filtration process with backwash

Department: Department of Carbohydrates and Cereals, Faculty of Food and Biochemical Technology
Theses supervisor: Ing. Andrea Hinková, Ph.D.

Annotation

Tangential flow membrane filtration is used as a separation method in all kind of industries. This is a process in which the membrane forms a selective barrier and the inlet is continuously fed along the membrane. Unlike conventional filtration, there is no formation of filtration cake and filtration can take place for a long time; pressure is most often the driving force. The whole system is then composed of membrane modules, pressure gradient pumps and control valves to ensure the desired direction of the filtered medium. The work is focused on the filtration of food products with the aim to isolate, separate or thicken the selected component from the feed mixture, using the measured data to build a filtration model and use it in the design and implementation of a higher management system. The measurement will be carried out on the existing double-pump filtration unit TIA with ceramic membrane modules and backwash unit. The station is also equipped with pressure, temperature, flow and primary pressure control via flap valves via the Siemens S1200 programmable logic controller.

Controlling drug crystals properties during crystallization and their impact on consequent unit operations

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Annotation

Active Pharmaceutical Ingredients (APIs) are commonly small molecules, which are prepared by crystallization process. Properties of prepared crystals (i.e. physico-chemical but also formulation properties) are strongly dependent on the used drug solid form, their size and crystal morphology. Therefore, the focus of this project is to study impact of crystallization process parameters and post-processing step on the prepared drug crystals with respect to size, morphology and polymorphism. Temperature modulated batch crystallization will be combined with wet-milling process to control the shape as well as flow properties of prepared drug crystals. Crystallization step will be combined with following steps, i.e. filtration and drying, to evaluate the impact of the crystal size and shape on the efficiency of these unit operations. In parallel, we will also study impact of washing step on the amount of remaining solvent and the polymorphic stability of the final product. While pharmaceutical industry is typically using batch operation, as a part of this project we will investigate the possibility to prepare same drug crystals as studied in batch mode in a continuous process. Process analytical technology capable to measure crystal size, shape and morphology com will analysis of composition via Raman spectroscopy will be used to ensure constant product quality. On-line measurement will be supported by off-line measurement via SEM, IR spectroscopy, XRD and NMR. Student will be also involved in the scale up of developed process.

Conversion of carbon dioxide to high-value products by hydrogen plasma

Department: Department of Power Engineering, Faculty of Environmental Technology
Study programme: Energie a paliva

Annotation

Nowadays the technologies of CO2 conversion are getting increased attention also because a new Green Deal EU strategy. The technology of CO2 conversion in reaction with H2 at very high temperatures (5000 °C) in the generated thermal plasma with H2 being the stabilising plasma gas will be explored in the doctoral thesis. A 30 years old plasma torch will be reconstructed for the possibilities of injecting CO2 directly into the plasma jet after complex technical simulation to identify the best solution. This novel technology will be tested with the aim to transform the CO2 to alternative fuels within the concept power to gas.

Corrosion monitoring in real time as a tool for understanding atmospheric corrosion

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: Ing. Tomáš Prošek, Ph.D.

Annotation

Corrosion monitoring is used as a standard tool for corrosion engineers in various industries and it is a key tool for scientists working in the field of aqueous corrosion. Due to technical limitations, it has rarely been applied in atmospheric conditions. Thanks to technical developments of the last decade, a number of advanced corrosion monitoring tools applicable in atmosphere are available. Within this work, fundamental knowledge on processes involved in atmospheric corrosion will be gained based on collecting real time corrosion data using advanced monitoring tools developed by our group, including conditions of outdoor exposure, corrosion in thin electrolyte films, wetting and drying phenomena, formation of protective corrosion products and description of microclimatic conditions in confined areas.

Covalent catalysis with flavins

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemie, Chemistry
Theses supervisor: prof. Ing. Radek Cibulka, Ph.D.

Annotation

Flavins are natural compounds acting as cofactors in redox enzymes. The mechanism of transformations provided by flavoenzymes are known for several decades. Nevertheless, very recently, new principles of a substrate activation have been described. They are mainly based on covalent bonding of the substrate to the flavin moiety. Being inspired by these newly discovered enzymatic processes, new flavin artificial catalytic systems for application in organic synthesis will be designed.

Critical assessment of potential of various gas chromatography - mass spectrometry platforms in food analysis

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology

Annotation

The doctoral thesis will focus on a critical assessment of performance characteristics of analytical methods employing various set-ups of gas chromatographic (GC) separation systems and various types of mass spectrometric analyzers. For separation of complex mixtures, the use of two dimensional gas chromatography (GCxGC) will be tested, for detection, tandem time-of-flight (Q-TOF) high resolution and/or triple quadrupole (QqQ) mass analysers will be employed. The applications will be concerned with food quality, safety and authenticity evaluation. Special attention will be paid to approaches based on non-target screening (fingerprinting / profiling).

Crosslinking of biopolymer composites for 3D printing

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Hynek Beneš, Ph.D.

Annotation

FDM 3D printing is currently a rapidly expanding area whose limitations are limiting number of thermoplastic (especially composite) materials suitable for 3D printing, which would have the desired electrical, thermal conductivity and mechanical properties. The aim of the project is to use a functional biopolymer as the curing component of the composite, which enables the shape fixation of the material in the final preparation step (after printing). The project deals with research of i) reaction and process conditions of crosslinking of biopolymers (keratin, chitin and chitosan), ii) preparation of nanofillers (e.g. graphene) in the presence of biopolymers and iii) rheological behavior of biopolymers / nanofillers systems.

Deep learning for de novo molecular design

Department: Department of Informatics and Chemistry, Faculty of Chemical Technology
Study programme: Bioinformatika
Theses supervisor: doc. Mgr. Daniel Svozil, Ph.D.

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De novo molecular design aims to generate novel chemical compounds with desirable chemical and pharmacological properties from scratch using computer-based methods. Recently, deep generative neural networks have become a very active research frontier in de novo molecular discovery. Though these methods enable the unprecedented coverage of chemical space, many aspects of their application still remain to be studied in a thourough detail. The dissertation will focus on various aspects of deep molecular generators including molecular representation, the creation of compounds with desired properties or the benefits of new deep architectures.

Degradation of materials in gas environment at high temperature.

Department: Department of Gaseous and Solid Fuels and Air protection, Faculty of Environmental Technology
Study programme: Energie a paliva

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The nuclear generation IV reactors are considered to replace older energy producing devices in the future. Several types of generation IV reactors are proposed. In two types of them - High Temperature reactor (HTR) and Gas Cooled Fast Reactor (GFR) helium as a coolant is used. Pressure and temperature of helium in these types of reactors reached very high values - to 16 MPa and 1000°C, and higher temperatures are planned for the future to achieve higher effectivity for conversion of thermal to electrical energy. This environment may damage components of the system, therefore structural materials have to be as resistant as possible. Structural materials for HTR a GFR may be distinguished into two types: metallic and nonmetallic. Among metallic materials for HTR belong mainly high temperature resistant steels and metal alloys. On metallic materials the tests of high temperature creep (constant strain) and fatigue (dynamic strain) resistance, corrosion in impure helium, etc. should be performed. Nonmetallic materials used in HTR are mainly nuclear graphite and composite materials. These materials should be tested for oxidation in impure helium, creep, dimensional and structural changes at high temperatures under and without radiation, etc.

Degradation of organic compounds fixed in the cement matrix

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

Dependence of quaternary ammonium salts antimicrobial effect on their structure

Department: Department of Dairy, Fat and Cosmetics, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Jan Šmidrkal, CSc.

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Some of quaternary ammonium salts are used in the form of pure substance as disinfection substance in human and veterinary medicine (Ajatin, Septonex). Other quaternary ammonium salts in the form of technical mixture are used as surfactants with the antimicrobial and antistatic effect in the skin cleaning cosmetics. The antimicrobial effect can be enhanced by altering the structure of the molecule of substance. In the theoretical part, find the quaternary ammonium salt in the literature, which are used as antimicrobial substances in medicine and cosmetics. Evaluate the literature data and suggest the synthesis of new quaternary ammonium salts, which would have higher antimicrobial effect. In the experimental part of the work, synthesize several series of pure quaternary ammonium salts. Optimize their synthesis conditions. Determine their critical micellar concentration and antimicrobial effect and compare it with the effect of currently used quaternary salts.

Design and simulation of a separation process for removal of colour substances from sugar solutions

Department: Department of Carbohydrates and Cereals, Faculty of Food and Biochemical Technology

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The colour of sugar solution is one of the main parameters used in sugar technology. In a traditional sugar technology, a complex calco-carbonic purification process using lime and carbon dioxide is applied to reduce the amount of colorants in sugar juice. These methods have high energy requirements and place immense demands on the environment. That is why new techniques (e.g. chromatographic or membrane processes) are being investigated to replace the traditional technology. This work is focused on testing of new membrane and chromatographic techniques to reduce the concentration of colour substances in sugar solutions. The main target is to design an optimized producing scheme to reduce the colour of the final product, including processing of intermediate and waste products. A mathematical model of the whole process should be an integral part of the results. This model will serve for the design of the control system.

Design and synthesis of novel heterocyclic compounds and evaluation of their biological properties

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Zlatko Janeba, Ph.D.

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In medicinal chemistry, heterocyclic moieties represent important pharmacophores of various biologically active compounds. The goal of the current project will be synthesis of novel heterocyclic compounds, their structural modification, and evaluation of their biological as well as pharmacokinetic properties.

Design and synthesis of novel photoswitches derived from bisazobenzenes

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: Ing. Zlatko Janeba, Ph.D.

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We have recently reported the synthesis of suitable substituted 5-phenylazopyrimidines (see selected references for more information). Their physicochemical properties were studied using in situ irradiation NMR spectroscopy and optical spectroscopy. The goal of the current project will be the synthesis of novel molecular photoswitches based on a combination of bisazobenzenes and pyrimidines, namely bis(pyrimidinyldiazenyl)benzenes. Their synthesis will be developed and optimized and their physicochemical properties will be evaluated. References: Procházková E., Čechová L., Kind J., Janeba Z., Thiele C.M., Dračínský M.: Photoswitchable intramolecular hydrogen bonds in 5-phenylazopyrimidines revealed by in situ irradiation NMR spectroscopy. Chem. Eur. J. 24: 492–498, 2018. Čechová L., Kind J., Dračínský M., Filo J., Janeba Z., Thiele C. M., Cigáň M., Procházková E.: Photoswitching behaviour of 5-phenylazopyrimidines: in situ irradiation NMR and optical spectroscopy combined with theoretical methods. J. Org. Chem. 83: 5986–5998, 2018.

Design of high performance flexible supercapacitors based on cellulose nanofibrils and conductive materials

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Design of soluble surface-active soap-cyclodextrin formulations

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Theses supervisor: Ing. Daniel Ondo, Ph.D.

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Cyclodextrins (CDs) are native macrocyclic compounds composed of glucopyranoside units with orientation to hydrophobic cavity and hydrophilic surface and are able to form inclusion complexes with various guest molecules. Due to their low price, CDs are a compound of choice to increase the solubility of low-soluble compounds, i.e., active pharmaceutical ingredients or long alkyl-chain surfactants (soaps). The aim of the proposed PhD MEDOK project (between UCT Prague and University of Regensburg) is to design well-soluble soap-CD surface-active biocompatible aqueous formulations. Since soaps are poorly soluble in water, in the first round, using phase and chemical equilibrium techniques, the soap/CD interaction will be probed in bulk solution on alkyl sulfates and salts of (un)saturated fatty acids (Prague). For selected soap-CD combinations, the effect of CD complexation of soaps on the bulk behaviour and on the air-water surface activity will be studied using static and dynamic interfacial methods (Regensburg). Structural insights of the prepared formulations will be probed by light scattering, spectroscopic and microscopic methods (Regensburg). Using a set of complementary bulk equilibrium, interfacial and solution structural experimental techniques and analyzing the results with respect to soap’s and cyclodextrin’s structure, temperature, presence of water hardening ions, etc., should provide sufficient information for proper design of water-soluble surface active soap-cyclodextrins formulations.

Determination of the composition of natural gas using Raman spectroscopy

Department: Department of Gaseous and Solid Fuels and Air protection, Faculty of Environmental Technology
Study programme: Energie a paliva

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Natural gas contains hydrocarbon and inert components which can be commonly determined using gas chromatography. Utilization Ramana spectroscopy for analysis of substances contained in the natural gas has not been more widely studied and the use of spectral methods has great potential in the future compared with chromatographic methods. The aim of this work is the study of qualitative and quantitative analysis of the components of natural gas using Raman spectroscopy.

Determining the human race and other specific attributes using a chemical analysis of human scent

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

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Basic patterns in molecular compositions of human scent samples determining the ethnical origins and other attributes (age, illnesses etc.) of people will be investigated.

Development of 3D cell cultures for the evaluation of drug delivery systems

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Development of a statistical mechanics model for the description of large ions

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Theses supervisor: RNDr. Mgr. Jan Heyda, Ph.D.

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The theory of hydrophobicity has reached a point where an analytic Hamiltonian description for purely hydrophobic particles is possible. For the description of large ions, electrostatic effects have to be incorporated in the theory. In Prague, the candidate will work on the implementation of the analytical model in the group of Prof. Heyda. In Regensburg, the candidate will work on the benchmarking of the model. The group of Prof. Horinek has a strong background in ion solvation and ion adsorption at interfaces. Molecular Dynamics simulation results for solvation free energies and ion-ion and ion-surface potentials of mean force will serve as reference data for the evaluation.

Development of atmospheric corrosion monitoring system

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Milan Kouřil, Ph.D.

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Majority of metallic objects, like metallic structures, vehicles, construction elements, cultural heritage, etc., is exposed in atmosphere. It deals with extreme costs and safety risks originated in corrosion. Corrosion protection is applied to avoid or minimize the impacts. There are many corrosion monitoring techniques available which might be applied for verification of corrosion countermeasures efficiency. However, the techniques must be accommodated to specific conditions of the particular fields. The project is focused on development of new device for atmospheric corrosion monitoring. The principle of the technique based on the electrical resistance method will be inovated. New corrosion sensors, electronics, software and data transfer and treatment will developed as well.

Development of biosensors for monitoring breast cancer exosomes and transported nucleic acids

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: RNDr. Miroslav Ledvina, CSc.

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Exosomes are extracellular vesicles secreted by cells, i.e. including tumor cells, into the extracellular environment as a mediator of intercellular communication. Due to the exosome biogenesis and thus determined similarity to parental cells and their presence in most body fluids, they can serve as a non-invasive alternative to tissue biopsy. The aim of the project is a development of ultrasensitive electrochemical and surface acoustic wave biosensors for the detection of tumor exosomes and carried nucleic acids as a diagnostic tool for detection of cancers and real-time monitoring of a therapeutic intervention. The transducer, which transforms the binding event between the sensor molecule grafted on its surface and the target analyte into a measurable signal, it will be in the first case the boron doped nanocrystalline diamond layer, and in the second case the utrathin diamond layer. In addition to DNA aptamers, peptides and saccharides, targeting HER2 marker and surface lectin galectin 3, respectively, will be used as others sensor molecules. With aim to increase the stability of the recognition element, carba analogues of saccharides attached with C-glycosidic bond and PNA (peptide nucleic acid) analogues of DNA aptamers that are resistant to enzymatic degradation.

Development of chemical tools to study and manipulate biological processes in live cells

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: Ing. Milan Vrábel, Ph.D.

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: Chemical reactions compatible with biological systems offer unique possibility to manipulate and study biological processes under native conditions. Our group has a long term interest in these, so-called, bioorthogonal reactions. Within last years, we have developed a series of reactions that enable us to monitor small molecules or biomolecules in living cells based on fluorescent signal formed during the chemical reaction. We also use chemical and biological approaches to produce peptide or glycopeptide libraries that we screen for specific binding to various cellular targets. Within this project, we plan to develop new and employ existing chemical tools to study and answer various biologically relevant questions. The ideal candidate should have background in synthetic organic chemistry but also interest in chemical biology and biochemistry. This interdisciplinary project will enable you to broaden your knowledge in these and related fields and to experience the international environment of the group and the Institute. References: 1) Vazquez, A., Dzijak R., Dracinsky M., Rampmaier R., Siegl S. J., Vrabel, M. (2017). Mechanism-Based Fluorogenic trans-Cyclooctene-Tetrazine Cycloaddition. Angew. Chem. Int. Ed., 56, 1334-1337. 2) Siegl, S. J., Dzijak, R., Vazquez, A., Pohl, R., Vrabel, M.: (2017). The Discovery of Pyridinium 1,2,4-Triazines with Enhanced Performance in Bioconjugation Reactions. Chem. Sci. 8, 3593–3598.

Development of computer interpretation of nuclear magnetic resonance spectra for molecular structure elucidation

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering

Development of gluten-free sourdoughs and optimization of their physicochemical and nutritional parameters

Department: Department of Carbohydrates and Cereals, Faculty of Food and Biochemical Technology

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Recently, there has been an increase in the population's interest in gluten-free products of all kinds, especially bread and other bakery products. Gluten-free products are required not only by groups of people suffering from celiac disease or other forms of gluten intolerance, but also by many other takers who are not diagnosed with intolerance. At the same time, there is a growing interest in bakery products containing various types of vital sourdoughs. The aim of this work will be testing and optimization of technological procedures used in the preparation of sourdoughs from gluten-free cereals and pseudocereals (sorghum, rice and buckwheat). In particular, procedures for activation of fermentation processes from available commercial starter cultures and also spontaneously started based on natural flour microflora will be examined. Furthermore intrinsic fermentation conditions (temperature, time, consistence). The procedures will be optimized on the basis of selected physicochemical characteristics of the resulting sourdoughs (especially pH and titratable acidity, content and mutual ratios of organic acids, profiles of volatile compounds), selected nutritional characteristics and further on the sensory properties of the sourdoughs and experimental bakery products prepared using them. Stabilized starter cultures will be prepared from successful spontaneously activated sourdoughs.

Development of machine learning algorithms for the prediction of terpene synthase activity.

Department: Department of Informatics and Chemistry, Faculty of Chemical Technology
Study programmes: Bioinformatics, Bioinformatika
Theses supervisor: Ing. Tomáš Pluskal, Ph.D.

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Bioactive plant metabolites are an essential source of chemical scaffolds for the development of new medicines. Our group is interested in establishing new cutting-edge methods to harness the biosynthetic potential of plant specialized metabolism for the benefit of human health. One of the interesting problems is prediction of enzyme activity from its amino acid sequence using computational approaches. In this project, we will develop machine learning platforms (e.g., deep neural networks) for predicting the chemical structures produced by a specific class of plant metabolic enzymes, terpene synthases. These enzymes are collectively responsible for generating the largest and the most diverse family of plant specialized metabolites with numerous medical and industrial applications. As side projects, the student will contribute to the development of computational workflows for mass spectrometry, metabolomics, molecular networking, and de novo transcriptome sequencing. References: 1. Christianson, D. W. Structural and Chemical Biology of Terpenoid Cyclases. Chem. Rev. 117, 11570–11648 (2017) 2. Vattekkatte, A., Garms, S., Brandt, W. & Boland, W. Enhanced structural diversity in terpenoid biosynthesis: enzymes, substrates and cofactors. Org. Biomol. Chem. 16, 348–362 (2018)

Development of methods for examination of heavy metals in microplastics

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie
Theses supervisor: prof. Dr. RNDr. Pavel Matějka

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The subject of this thesis will be the study and development of the methodology for monitoring sorption processes between heavy metals and microplastics, which are increasingly present in water, even drinking and packaged. In general, plastics contain heavy metals from technological processes. Moreover, they are also able to bind these metals from the environment and serve as their vectors. Hence, the ability to describe adsorption and desorption appears to be crucial in studying the toxic potential of microplastics in the environment and human health. The following analytical methods will be used for the study of sorption processes: optical microscopy, infrared and Raman spectroscopy, tip-enhanced Raman spectroscopy, scanning electron microscopy, inductively coupled plasma mass spectrometry and secondary ion mass spectrometry to monitor both organic and toxic heavy metals ions.

Development of methods for stabilization of organic radicals

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Tomáš Slanina, Ph.D.

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Organic radicals and radical ions represent an interesting class of open-shell molecules that are relevant in the design of molecular electronics and systems for light energy conversion and storage. Since most organic molecules prefer closed shell configuration, persistent organic radicals are rare species that must be stabilized by external factors (steric hindrance, second-row elements, confined environment).[1] The candidate will develop various methods for stabilization of radicals and radical ions which will be generated by photoinduced electron transfer and other redox processes. He/she will utilize a combined synthetic and spectroscopic approach to investigate the formation, stability and properties of radical ions.[2] The developed methods will be further utilized for systems capable of reversible electron transfer and manipulation with charges and counterions. The highly motivated and skillful candidate will have the opportunity to extend his/her graduate training in physical and organic chemistry by learning electrochemical, photochemical and advanced spectroscopic methods. He/she will become a part of a dynamic junior research team investigating small organic molecules undergoing redox processes and reversible chemical reactions. References: [1] T. Fiala, L. Ludvíková, D. Heger, J. Švec, T. Slanina, L. Vetráková, M. Babiak, M. Nečas, P. Kulhánek, P. Klán, et al., J. Am. Chem. Soc. 2017, 139, 2597–2603. [2] T. Slanina, T. Oberschmid, ChemCatChem 2018, 10, 4182–4190.

Development of nanoparticles for sonotherapy

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

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Main focus of this project is to synthesize multifunctional vesicles loaded with hydrophilic and hydrophobic drugs and inorganic nanoparticles (iron and gold) as the novel nano carrier for photoacoustic imaging and ultrasound mediated delivery into cancer cells. Student will study the impact of vesicle composition (primary system will be surfactant and cholesterol forming niosomes) and method of preparation on the size and properties of the formed nano carriers as well as drug encapsulation efficiency. Furthermore, to tune drug release kinetics gold nanoparticles with various sizes and shapes will be synthesized and incorporated either in the core or in the shell of niosomes. Once drug will be loaded into niosomes its release will be measured as a function of ultrasound intensity and duration as well as upon exposure to the light irradiation. In vitro experiments are planned to be used to test uptake by the cells. Using theoretical and experimental approaches, interactions between the drugs and niosomes will be studied to understand the possible mechanisms for their incorporation allowing to optimize the long-term formulation stability. Quality of the prepared samples will be characterized by combination of analytical techniques including 3D modulated DLS, Depolarized dynamic light scattering, static light scattering, optical video microscopy combined with image analysis, XRD, UV/VIS and Raman spectroscopy and cryo-TEM.

Development of new composite materials for efficient adsorption and gas separation

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programmes: Chemistry, Chemie

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High greenhouse gas production has a negative impact on the environment. Therefore, the development of new separation technologies with enhanced efficiency and low capital cost is an emerging demand in the near future. Separation, adsorption and storage of greenhouse gases, in particular CO2 and the recovery of H2 or CH4 as energy sources are of paramount importance for the further development of society. The project is focused on the preparation, characterization and use of advanced materials for the capture and separation of gases, mainly CO2. One possibility is to use dendrimers, a class of synthetic macromolecules with a regular and highly branched structure, characterized by a large interior space and a large number of functional groups on the surface. These properties of dendrimer can lead to an increase in the adsorption capacity and selectivity of the new material. The work includes experimental determination of adsorption capacity and separation efficiency of newly prepared materials for selected gases.

Development of polyaromatics-based sensors of polar molecules

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Jan Storch, Ph.D.

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The aim of this Ph.D. thesis will be the synthesis and characterization of appropriate helicene/phenacene derivatives for preparation of electrochemical detectors for polar molecules sensing; Such systems can serve in humidity detection, for example, in automotive; geological research or in specialized medicinal applications.

Development of proteomic techniques for differentiation of animal origin of recent and historical bones

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology

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The dissertation thesis is focused on the development of a new proteomic methodology suitable for the differentiation of animal origin of bones based on their protein composition. Bone tissue is one of the hardest tissues found in organisms. 60% of dry bone weight is formed by inorganic components (especially hydroxyapatite) and 40% is formed by organic component in which collagen type I is the most abundant protein. The methodology will be tested on recent bones, which will be analysed fresh and after heat treatment, and on bones obtained from archaeological sites, which are expected to occur degradation products of the protein components, which will also be studied.

Development of robot for preparation of personalised medicine

Department: Department of Computing and Control Engineering, Faculty of Chemical Engineering
Theses supervisor: doc. Ing. Jan Mareš, Ph.D.

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Preparation of personalized medicine is an attractive field where modern methods of measurement, control and statistical analysis are fundamental. The goal of the dissertation is to develop specific technology for the preparation of personalized medicines using impregnation of porous placebo tablets with a solution of a drug. The aim of the work is to construct an automated impregnation robot capable of complete preparation of personalized medicines: a) impregnation, b) drying, c) quality control.

Development of scaling-up methods of industrial mechanically agitated reactors

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: doc. Dr. Ing. Tomáš Moucha

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Fermenters or, in general, mechanically agitated aerated vessels are frequently used in industry for the intensification of gas-liquid mass transfer, especially in the case of a low gas to liquid volume ratio. Industrial processes as aerobic fermentations, hydrogenations and chlorinations can serve as examples of their application. In many processes the gas-liquid interfacial mass transfer becomes the rate determining step, so the volumetric mass transfer coefficient becomes the key parameter in the design. Mass transfer laboratory pays many year effort to gas-liquid mass transfer measurement in mechanically agitated gas-liquid dispersions with the aim to formulate the scaling-up rules for industrial vessels design. In the frame of this research an extensive experimental work has been done using various batch types (coalescent, non-coalescent, viscous) and for various impeller types (from purely axially pumping to purely radially pumping ones) and their combinations. After collecting large data series in laboratory scale vessels, experimental work continues using pilot-plant vessel equipped with a modern computer controlled regulation and data acquisition system in the form used also in industry. The aim of the PhD work is to collect the transport characteristics (impeller power, gas hold-up and volumetric mass transfer coefficient, kLa) measured in the pilot-plant vessel using various types of impellers (e.g., Rushton Turbine, Lightnin, Techmix, Pitched Blade impellers). The experimental research will be now focused to the transport characteristics in viscous batch and in the presence of solid particles. Both high viscosity and solid particles presence are typical features of industrial fermentation broths. Based both on the laboratory data and on the pilot-plant data the scaling-up rules will be formulated, which will be employable for industrial gas-liquid contactors design. A PhD student will get acquainted with the design methods of other gas-liquid and vapour-liquid processes as well, because he/she will work in the team dealing also with the absorption columns, distillation columns and ejector bubble columns design. More info: Tomáš Moucha, UCT building B, ground floor, room No. T02a, phone: 220 443 299, e-mail: mouchat@vscht.cz

Development of systems for reversible electron transfer

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Tomáš Slanina, Ph.D.

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Electron transfer and charge separation are one of the most important phenomena in the Universe. It plays an important role in processes essential for life, such as photosynthesis, respiration, protein folding and biocatalysis. It is also highly relevant for solar cells, batteries, molecular electronics, and smart materials. The thesis will focus on the possibility of reversible charge transfer between two redox-active centres. The transfer of charge will be in both directions controlled by photoinduced electron transfer[1,2] and both states will be stabilized by external factors, such as macromolecular complexation, follow-up chemical reaction or interaction with stabilizing the molecule.[3] Systems capable of reversible electron transfer where both states will be macroscopically stable will exhibit novel and unprecedented properties: dipole reorientation, control of charges and counterions and regulation of electrostatics.[4] These unique properties will be further used in the design of novel materials and devices in molecular electronics. The candidate will perform synthesis and characterization of organic redox-active molecules and will study their properties both in solution and solid state to understand the phenomena of reversible electron transfer. He/she will become a part of a dynamic junior research team investigating small organic molecules undergoing redox processes and reversible chemical reactions. The highly motivated and skillful candidate will have the opportunity to extend his/her graduate training in physical and organic chemistry by learning electrochemical, photochemical and advanced spectroscopic methods. References: [1] T. Ghosh, T. Slanina, B. König, Chem Sci 2015, 6, 2027–2034. [2] A. U. Meyer, T. Slanina, C.-J. Yao, B. König, ACS Catal. 2016, 6, 369–375. [3] T. Fiala, L. Ludvíková, D. Heger, J. Švec, T. Slanina, L. Vetráková, M. Babiak, M. Nečas, P. Kulhánek, P. Klán, et al., J. Am. Chem. Soc. 2017, 139, 2597–2603. [4] L. S. McCarty, G. M. Whitesides, Angew. Chem. Int. Ed. 2008, 47, 2188–2207.

Diagnostics of two-phase flows in microchannels

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: Ing. Jaroslav Tihon, CSc.

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The aim of this project is an experimental investigation of the character of two-phase flow (gas/liquid) in microchannels. The mapping of different flow regimes will be carried out for various microchannel configurations (e.g. channel crossing, T-junction, sudden expansion) and different model liquids (Newtonian, viscoelastic, pseudoplastic). The electrodiffusion method, an original experimental technique developed in our department, will be used to determine the near-wall flow and to detect the characteristics of translating bubbles. The visualization experiments using a top-level high-speed camera (Redlake) and the velocity field measurements by mPIV technique (Dantec) will bring additional information on the flow structure in microchannels. The candidate should have a M.Sc. degree in chemical engineering or in a similar applied science field. He/she should possess experimental skill for a laboratory work and some basic knowledge of hydrodynamics. However, the enthusiasm for independent scientific work is the first principal requirement. The candidate will surely profit from our long-time experience in experimental (computer-controlled measurements with subsequent data processing in LabView) and theoretical (solving the complex hydrodynamic problems in MatLab or Mathematica) fluid mechanics.

Disinfection effects of non-thermal plasma for application in medicine

Department: Department of Physics and Measurement, Faculty of Chemical Engineering

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Plasma medicine is a new and progressive topic of scientific research. Non-thermal plasma seems to be a possible alternative to the common disinfection and sterilization methods. Scope of this work are the corona discharges and their perspectives for the wound healing, paliative therapy in oncology or the infection treatment in dermatology and podiatry. Moreover, this work covers also the investigation of microbicidal effects of corona discharges to the bacteria, bacterial spores, yeast, fungi and other microorganisms.

Dynamical pathways of peptide fibril formation in osmolyte solutions

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Theses supervisor: RNDr. Mgr. Jan Heyda, Ph.D.

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Various diseases like Alzheimer, Parkinson, or diabetes are linked to the formation of peptide fibrils. In this project we aim to analyze theoretically how the kinetics of fibril formation is modified by the presence of stabilizing and destabilizing cosolutes. The work will start with GNNQQNY, one of the most simple peptides that form fibrils. Extensive molecular dynamics simulations in the presence of urea and TMAO will be performed using advanced methods from replica exchange MD for sampling to methods like transition path sampling or forward flux sampling for the determination of transition rates. Markov state models will be developed for a classification of the kinetic pathways. Further systems to be studied can include more complicated peptides like Ab42 and complex biological cosolutes like ATP.

Dynamics of multi-phase systems: gas-liquid-solid

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

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Multiphase systems are all around us, in nature and in industry technologies and applications (sedimentation, fluidization, bubble columns, flotation apparatuses, etc.). Due to the complexity and applicability of these systems, it is seriously worth to study their hydrodynamic aspects. The present PhD research will focus on the experimental and theoretical description of processes controlling multiphase dispersions at microscale level (like bubble coalescence, bubble-particle collision) and their consequences on the flow regimes at the macroscale level (bubble columns, flotation apparatus, etc.). The obtained results will be valuable in many industrial applications (chemical and oil industry, food processing, metallurgy, pharmaceutical and environmental industry).

Ecodesign and design for environment

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

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The aim of the dissertation will be the development of tools to integrate environmental aspects into the processes of development and design of new products. The choice of materials, the functionality of the products and a number of parameters predetermined in the product design define the future environmental aspects of the product. The content of the work will be the integration of the life cycle assessment method into the way of work of the designer.

Ecodesign for sustainability and circular economy

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

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The aim of the dissertation will be the development of tools to integrate environmental aspects into the processes of development and design of new products. The choice of materials, the functionality of the products and a number of parameters predetermined in the product design define the future environmental aspects of the product. The content of the work will be the integration of the life cycle assessment method into the way of work of the designer.

Effect of interfacial properties on dynamics of bubbles and drops

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

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Multiphase systems consisting of a gas phase or a liquid phase dispersed in a liquid environment, such as foams, emulsions, are omnipresent in nature and in living systems, as well as in industrial products of high added value as in pharmaceutical and cosmetical applications. The presence of surfactants (SAS) alters the behavior of many multiphase processes, and for systems in motion, the characterization of the interface only by surface tension is not enough and less conventional measurements of surface rheology and SAS adsorption/desorption characteristics are crucial. The aim of this work is to experimentally determine the influence of SAS on the dynamics of processes with bubbles and drops (movement, dissolution, breakup, coalescence, etc.) and to characterize selected SASs by measuring relevant physico-chemical and transport properties. The typical work will include measurements of interfacial rheology, observations of bubble/drop dynamics by high-speed camera, but also building single-purpose experimental equipment and physical interpretation of results.

Effect of phosphates on the colloidal stability of the liquid dairy products

Department: Department of Dairy, Fat and Cosmetics, Faculty of Food and Biochemical Technology

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Milk is a polydisperse system of protein and fat whose good colloidal stability is an essential requirement for heat treatment and storage of liquid dairy products. The addition of various kinds of phosphates is one possibility to modify these properties. The aim of the work will be the characterisation of the influence of chosen phosphates on colloidal stability and rheological properties of liquid dairy products during their heat treatment and storage.

Effect of technology on characteristics of non-alcoholic beer

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology

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Beer consumers are accustomed to a product that offers a pleasant and well-defined taste. However, in alcohol-free and alcohol-reduced beers these characteristics are totally different from those in regular beer. Nevertheless, there are differences in alcohol-free beer characteristics, which are dependent on production technology. The target of this thesis will be a comparison of today used technologies for the production of beers, mainly from point of view beer volatile compounds and suggest possible strategies of production alcohol-free beers with optimal characteristics.

Effect of thermal processes on fiber composition and nutritional value of biscuits

Department: Department of Carbohydrates and Cereals, Faculty of Food and Biochemical Technology

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Fiber content is one of the important qualities of cereals. The presence of dietary fiber in the diet stimulates intestinal motor, reduces the absorption of cholesterol and slows the absorption of sugars.Technological food processing influences the content, bioavailability, nutritional quality and physicochemical properties of the dietary fiber and, on the contrary, the addition of dietary fiber influences the technology and consequently the sensory quality of the food product. The role of dietary fiber is to contribute to a general microstructure that appears to be crucial in determining the physico-chemical properties of dietary fiber-enriched foods. The thesis is focused on evaluation of influence of thermal processes used in the secondary processing of cereals on dietary fiber, its nutritionally significant components and the bioactive substances accompanying fiber in the outer layers.The theoretical part is devoted to the definition, methods of determining and the health effects of dietary fiber and a description of technological operations, mainly thermal processesused in the production of biscuits and breakfast cereal products (snack foods), which will be devoted to the experimental part of the work.Besides the traditional materials used in bakery technology also new specially milled flours and flours from unconventional sources as barley or buckwheat will be tested.

Effect of two-dimensional support on catalytic activity of supported catalysts

Department: Department of Organic Technology, Faculty of Chemical Technology
Theses supervisor: Ing. Martin Veselý, Ph.D.

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Two-dimensional (2D) materials exhibit increased catalytic activity in 2D material supported metallic nanoparticles in comparison with their bulk counterparts. The increase in activity attributes to specific 2D support-nanoparticle interactions. The project is focused on an investigation of the specific interactions for graphene, as reference support, and ‘materials beyond graphene’ based on phosphorus, arsenic, antimony, and bismuth. To suggest a mechanism of the specific interactions, we will investigate a spatial-temporally resolved catalytic activity of supported catalyst prepared by lithography and chemical routes. By tuning of a spatial distribution and size of the active sites, we will identify individual contributions, including an exclusive effect of the support, causing the increase in catalytic activity. The suggested mechanism, also verified by standard methods of catalytic testing, will bring a new insight into the understanding of nanoparticles-2D support interaction and open new possibilities for the rational design of 2D material supported metal catalysts.

Effectiveness of biochar application to contaminated soils under drought stress

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

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Biochar application represents one of the current topics of global importance. This application results in carbon sequestration and also has significant effect on soil properties and soil biota. Biochar application contribute by positive biomass growth, physiological and biochemical traits of plants, soil microbial activity and also reduction of negative impacts of toxicants in contaminated soils. In the same time, soil water saturation is another important aspect. The aim of the study will be to determine the effects of biochar (of various origin) on the soil organisms, mainly plants, under combined stress conditions, i.e. water deficit and contamination of the soil by heavy metals.

Elastic, dielectric and piezoelectric properties of ceramics and composites

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

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Elastic, dielectric and piezoelectric properties are of fundamental importance for many types of functional ceramics and composites. Figures of merit for these materials, e.g. ceramics for hydrophone applications, are usually determined by a complex interplay of these three types of properties. This PhD topic focuses on the study of the dependence of the effective elastic, dielectric and piezoelectric properties on the microstructure, mainly porosity, pore shape and grain size (in the case of composites also volume fraction). The student is required to have a background in materials science (not necessarily specialized on ceramics) and an interest in challenging theory (full tensor formalism for second-, third- and fourth-order tensors), computer modeling and experimental work with real-world materials.

Elastic, dielectric and piezoelectric properties of ceramics and composites

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

Annotation

Elastic, dielectric and piezoelectric properties are of fundamental importance for many types of functional ceramics and composites. Figures of merit for these materials, e.g. ceramics for hydrophone applications, are usually determined by a complex interplay of these three types of properties. This PhD topic focuses on the study of the dependence of the effective elastic, dielectric and piezoelectric properties on the microstructure, mainly porosity, pore shape and grain size (in the case of composites also volume fraction). The student is required to have a background in materials science (not necessarily specialized on ceramics) and an interest in challenging theory (full tensor formalism for second-, third- and fourth-order tensors), computer modeling and experimental work with real-world materials.

Electrochemical behaviour of the metallic biomaterials

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Jaroslav Fojt, Ph.D.

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The interaction between the metallic material and body environment plays a key role in the implant integration process. The surface properties of the material influence not only the primary interaction of the implant with the organism but also its long-term lifetime. The understanding of electrochemical processes on the phase boundary is essential for the development of new materials as well as for the modification of existing alloys. In the course of the thesis, the passive metal-simulated body-environment interaction will be studied in detail by means of electrochemical and spectroscopic techniques.

Electrochemical energy storage based on metal-air chemistry

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: prof. Dr. Ing. Juraj Kosek

Electrochemical methods for process water treatment

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Martin Paidar, Ph.D.

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Electrochemical methods are suitable for water treatment due its simplicity and high efficiency. Main disadvantage is usually high price. Therefore electrochemical methods are used in the case of water of high salinity or otherwise contaminated. This is not possible to be treated by biochemical methods. Application of individual method has to be evaluated with respect to the direct process water composition.

Electrochemical synthesis of hypervalent iodine compounds as highly selective organic oxidants

Department: Department of Inorganic Technology, Faculty of Chemical Technology

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A highly selective oxidations of organic compounds belongs, especially in the case of highly added value products, among highly attractive processes. At present, such conversions are usually achieved using oxidation agents based on often toxic transition metals such as Cr(VI), Mn(VII), Ru(VI) či Os(VIII). An interesting „green“ alternatives to these oxidants represent benign hypervalent iodine based organic oxidation agents. The work will be focused on investigation of electrochemical behaviour of these compounds and their presursors. A motivation of the work is to use electrochemical oxidation for the production of hypervalent iodine oxidants allowing their application as industrial scale.

Elucidating the origin of magnetoelectric coupling in Fe4M2O9 phases

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

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Multiferroic materials exhibiting at least two ferroic orders such as ferroelectricity and ferromagnetism are the focus of researchers attention. The magneto-electric coupling is very appealing for applications in devices, such as memories, where the magnetic information has to be controlled by an electric field. The thesis work will focus on the synthesis and the study of the structural/magnetic/dielectric/ ferroelectric properties of Fe4M2O9 mono- and poly-crystals. As these Fe2+ containing oxides exist only for M = Nb and Ta, the thermodynamic stability of these phases will be calculated in connection with their magneto-elastic coupling.

Enantioselective catalysis under the control of helical chirality

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Zdeněk Starý, Ph.D.

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The goal of the PhD project will be the development of new helically chiral ligands and metal complexes to be explored in enantioselective catalysis. The attention will be paid to asymmetric synthesis of helicene-derived N-heterocyclic carbenes, cyclic (alkyl)(amino)carbenes, 2,2'-bipyridines and cyclometallated helicenes. These chiral ligands/metal complexes will be applied to selected enantioselective reactions catalysed by transition metals such as alkyne cycloisomerisation, olefin metathesis or hydrogenation.

Environmentally Assisted Cracking of Low Alloy Steels

Department: Department of Power Engineering, Faculty of Environmental Technology
Study programme: Energie a paliva
Theses supervisor: doc. RNDr. Petr Sajdl, CSc.

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Environmentally assisted cracking on low alloy steels with stress on pipeline conditions, mainly on cases of corrosion attack under insulation, it mens from outer side of pipeline walls. Extensive literature overview of stress corrosion cracking , experimental methods and application results ways enable accurate design of tests. Experiments simulating pipeline conditions will bring results about crack propagation rates, about initiation and about relation of these data with material stresses. Comparison of results with real pipeline data and theirs application in methods for pipeline integrity evaluation lead to a considerable refinement of results which are key thing for safety of operated facilities.

Environmnetal aspects evaluation of carbon capture and utilisation technologies

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

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The dissertation thesis is focused on the evaluation of environmental aspects of the whole life cycle of CCU technologies. These are technologies for capture and use of carbon dioxide.

Enzymatic synthesis of metal nanoparticles with application potential

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie

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Due to its outstanding physical-chemical properties, metal nanoparticles are the most widely produced types of nanomaterials with a wide application potential. The thesis will focus on the use of metabolism of microorganisms (bacteria and fungi) and plant extracts for intracellular and extracellular biosynthesis of metal nanoparticles, which exhibit antimicrobial activity in particular. Depending on the change in external conditions, the growth phase of the applied microorganism, and the type of metal precursor, wide possibilities for biosynthesis of new nanoparticles, which may have different size, shape and surface modification, are opened up. The nanoparticles obtained will be characterized by available physical techniques. The antimicrobial activity of the synthesized nanoparticles will be tested against selected opportunistically pathogenic microorganisms growing in suspension and biofilm.

Enzyme-catalyzed reaction of vegetable oils in supercritical CO2

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: Ing. Marie Sajfrtová, Ph.D.

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Enzymatic reactions in supercritical carbon dioxide (scCO2), combining advantages of enzyme specificity, fast diffusion in supercritical fluids, and non-toxic scCO2, are a relatively new and promising field of research. In the present project, they are applied to enrich the products of vegetable oil reactions with w-3 a w-6 polyunsaturated (essential) fatty acids, necessary in nutrition. The reactions catalyzed by a regiospecific enzyme and methods for separation of the fraction enriched in essential fatty acids from reaction mixture will be studied. The aim is to propose a “green” way to prepare enriched vegetable oils, which will integrate the extraction of oil from seeds, its reaction, and fractionation of reaction mixture and will be based on the application of scCO2

Ethanol production from synthetic gas by autotrophic or mixotrophic bacteria

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie
Theses supervisor: prof. Dr. Ing. Petra Patáková

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Increasing emphasis on the use of waste within the so-called circular economy forces us to look for more environmentally friendly variants of conventional productions, which includes the effort to use carbon dioxide, one of the greenhouse gases as a suitable carbon source not only for plants and algae. The work deals with the production of ethanol by the so-called Wood-Ljungdahl metabolic pathway from synthesis gas, i.e. mixture containing CO, CO2 and H2 together with other minor components. Synthetic gas is obtained by gasification of biomass or other materials at high temperatures and its composition is variable depending on the starting material and the gasification method. The essence of the work will be the selection of a suitable strain capable of using this gaseous mixture as a carbon source. The use of selected species of Clostridium bacteria, such as Clostridium ljungdahlii or other genera, is assumed. In addition, the resistance of the selected strain to inhibitors resulting from gasification (tar, ammonia, cyanide, etc.) will be tested. Part of the thesis will also be the design of a suitable type of cultivation (batch with free or immobilized cells or continuous) and ideally also the transfer of the developed process from laboratory to pilot scale in cooperation with an industrial partner.

Experimental and modelling study of diffusion and relaxation processes in polymers

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: prof. Dr. Ing. Juraj Kosek

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Diffusion and sorption of species in polymeric materials is essential in many applications: membrane separation, food protection, controlled ripening, degassing of polymers, production of polymers in reactors, coating by polymer latexes. Better understanding of diffusion in polymer is limited by scarce systematic experimental studies. Moreover, many theoretical models of penetrant diffusion in polymers were introduced, but the quality and adequcy of these approaches are often not well assessed. This PhD project aims to contribute first to systematic experimental studies of diffusion, sorption and related processes. The working horses are going to be differential pressure decay, confocal Raman in pressure cell and TD-NMR apparatuses and the results will be accompanied by systematic sorption equilibria and swelling studies, SAXS, micro-CT, DSC, GPC and AFM. The purpose of these studies is to provide comprehensive characterization of polymer samples including their semi-crystalline morphology and relaxation dynamics of polymer chains. Theoretical concept describing diffusion are usually based on Fickian-like models, models employing the free-volume theory and model with driving force described consistenty with thermodynamics by the gradient of chemical potential. Moreover, semi-crystalline morphology is usually introduced just empirically into the models. Moreover, physical chemistry offers molecular dynamics simulations, which are somehow limited by the available computation power. All these models will be assessed with respect to the database of high-quality diffusion data. The main goal is to establish predictive models of diffusion in polyolefin materials. Such well validated models are currently not available. The situation is complicated also by the non-isotropic nature of diffusion in many materials with the history of their thermal processing affecting semi-crystalline morphology. Prospective PhD student shall be involved in activities contributing to his/her personal development including the construction of new apparatuses and participation on grants and industrial projects. Prospective PhD student is expected to spend a term in some European laboratory with similar research interests and to take some responsibility for the contractual industrial research. Info: phone +420 220 44 3296, office B-145, e-mail jkk@vscht.cz, web http://kosekgroup.cz

Exploration of the Fe-W-O system for magnetism and photo(electro) chemistry

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

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The aim of this study is to capitalize on the richness of the crystalline, magnetic and electronic structures and photocatalytic properties of W-based oxides by investigating the Fe-W-O system. It is proposed to focus on Fe2WO6 as it crystallizes in three different structures exhibiting different transport and magnetic properties. It is of interest to study the thermodynamic conditions in this area of the ternary diagram Fe-W-O to monitor and optimize precise composition and synthesis conditions. Structures and microstructures will be studied by suitable diffraction methods and microscopies. Compounds will be characterized by measuring their magnetic and electrical properties; those with suitable bandgap will also be tested for photocatalytic or photoelectrochemical properties relevant to catalytic degradation of organic pollutants, water splitting or photovoltaic cells.

Exploring the fundamental molecular interactions modulating glycocalyx bioactivity

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

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Glycocalyx or extracellular matrix is a charged thick layer of biomacromolecules, which is bound to the membrane at the cell surface. It is constituted fundamentally of polymeric-sugars, proteins, and the underlying membrane. Although the molecular structure of glycocalyx is directly responsible for many functions and pathologies, it is far from being understood. In this project, we have the ambitious goal of getting a more in-depth insight into the molecular interactions between fundamental components of the glycocalyx, e.i., sugar–sugar, sugar–protein, sugar–membrane. This project mainly focuses on computational methods(Molecular and Quantum mechanics). The students are also expected to do complementary experimental work, primarily spectroscopic methods (e.g., Raman, Fluorescence, and NMR) but also other physical chemistry technics (e.g., measurements of osmotic coefficients).

Fabrication of hierarchical structures and their interaction with a living cell

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Study programme: Chemical Engineering
Theses supervisor: Ing. Viola Tokárová, Ph.D.

Fish identification: molecular-biological and proteomic approaches

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology

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Food market is still broadened with new products from different producers and suppliers, which increases the diversity of consumers' menus on one hand, but therewithal it creates conditions for food fraud on the other hand. Food fraud may be associated also with health hazards for consumers. The consumers´ misleading can be done e.g. by replacing more expensive raw materials with cheaper ones, failing in complying the declared composition or by deliberately mislabelling the geographical origin or the production method. One category of often-falsified food are fish, fish products and seafood, which are also associated with the occurrence of significant allergens. The work aims to develop and experimentally verify methodologies for the identification of fish using DNA and protein analysis. Molecular-biological methods should allow such species determination within the class of Actinopterygii, and will comprise modern methods such as polymerase chain reaction (PCR, qPCR, and dPCR) and sequencing. The target gene to be analysed is the gene encoding the main fish allergen, parvalbumin. The proteins analysis will be aimed at comparing proteins profiles obtained by mass spectrometry MALDI-TOF (M)atrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry).

Flow-through milifluidic systems for investigation of electromembrane separation processes

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: doc. Ing. Zdeněk Slouka, Ph.D.

Fluid bed processing of nanosuspensions

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Fluidized Bed Incineration of Sewage Sludge

Department: Department of Power Engineering, Faculty of Environmental Technology
Study programme: Energie a paliva

Formation of Microstructured Materials through Self-Assembly

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: RNDr. Ivan Řehoř, Ph.D.

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Self-assembly is a spontaneous arrangement of individual units - building blocks - into an ordered structure. The ordered structure has the lowest energy from all accessible building block arrangements, which drives the assembly process. The arrangement of the ordered structure is defined by the properties of the building blocks, such as their shape, material anisotropy or magnetic interaction with external field. Tailoring these properties to achieve desired structure can be considered 'programming' and may represent viable alternative to other ways of constructing micro and nanostructured materials. The question of lengthscales is crucial in self-assembly. When building blocks are small enough (We recently demonstrated, that we can assemble anisotropic hydrogel microparticles on solid liquid interface to form ordered 2D structures. We introduced novel mechanisms to control orientation of the building blocks during the self-assembly process and, thus, to not freeze in the disorderedd state. Ordered microparticles can be subsequently covalently bound together. The resulting structure - sheet - has complex mechanical properties i.e. ability to buckle in a preprogrammed way determined by the shape, size and material composition of the building blocks. The goal of the project is to find new approaches to the self-assembly of hydrogel microparticles and combine them with directed asembly methods using mobile microrobots developed in our team (https://www.youtube.com/watch?v=PQOXS7f9rDg). Resulting structures will find application in the preparation of metamaterials, microrobotics or tissue engineering.

Formation of drug colloids in gastrointestinal tract and their characterization

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

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Many active pharmaceutical ingredients (APIs) have low solubility in water, which causes their low bioavailability. To improve this negative effect it is common to prepare metastable forms of APIs, which are characterized by enhanced solubility. However, this often results in their low stability during dissolution which is manifested by APIs precipitation. In this project we will investigate conditions leading to the formation of colloidal particles composed of API, which can be considered as APIs reservoirs. Impact of common excipients used as nucleation or growth inhibitors will be combined with naturally occurring surfactants in the GI fluids. Combination of several analytical techniques, i.e. DLS, SLS, optical video microscopy combined with image analysis, surface tension measurements, DSC, XRD, UV/VIS, Raman spectroscopy SEM/TEM combined with elemental analysis and NMR will be used to identify size, shape and composition of the formed colloids. Specific experiments mimicking mass transfer through the intestine membrane will be used to study the dynamic of drug colloids and their capability to maintain API super saturation. Experiments performed in our laboratory will be combined with measurement of mass transport in simulated GI tract setup provided by our academic collaborator.

Fuel cells without platinum

Department: Department of Solid State Engineering, Faculty of Chemical Technology

Fundamentals of organic mechanochemistry

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Martin Krupička, Ph.D.

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Synthetic organic mechanochemistry studies reactions induced by mechanical force, most importantnly in ball mills. The work concerns the study of fundamental mechanistic phenomena associated with solid state organic reactivity.

Galvanic electrocatalytic layers in water alkali electrolysis

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: Ing. Jaromír Hnát, Ph.D.

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The aim of this project is development of an efficient electrocatlyst for cathodic hydrogen evolution reaction (HER) in an alkaline environement based on galvanic modification of the Ni substrate. After identification of the optimal coatings properties and deposition method the techniques will be transferred to the 3D porous electrodes to enhance process efficiency and tested in a laboratory and pilot scale alkaline water electrolysis cell.

Gas transport study in graphene oxide and carbon nanotubes based membranes

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Study programmes: Chemie, Chemistry
Theses supervisor: doc. Ing. Karel Friess, Ph.D.

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Membrane separation processes (MSP) belong to the modern technologically significant separation methods. Furthermore, MSP are less economical demanding and more eco-friendly industrial processes compared to the conventional separation techniques used in chemical, petrochemical, pharmaceutical and food industries. The most significant industrial applications of MSP for gas separation are focused on separation of helium from natural gas, separation of hydrogen from hydrocarbons, carbon monoxide or nitrogen and also for removing carbon dioxide from biogas or organic vapors from air. Generally, graphene oxide (GO) based membrane materials belong to the modern and dynamically growing group of materials that have many interesting properties. Especially, this work will be targeted on GO based separation of hydrogen from carbon dioxide. Our laboratory is focused on the topic of membrane separation for more than 15 years. Currently, we participate in two grant projects of the GA CR aimed at increasing the efficiency of membrane separation processes. This doctoral thesis is thematically linked to these projects. The thesis will be focused on the study of theoretical and experimental aspects of the transport of gases and their mixtures in GO and polymer based membranes.

Glazes with controlled reflectance

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

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Ceramic materials are surface-treated by applying different types of coatings, the most common surface finishing of ceramic products are glazes- stable glassy coatings. By using suitable additives / pigments in glazes, the final properties of a ceramic product, such as roofing tilles, can be adjusted. The dissertation will focus on the preparation of glazing with controlled reflection of "cool roof" systems.

Glycoconjugates of triterpenes

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology

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Plant triterpenes are natural products often displaying different types of biological activity. Their disadvantage consists in their limited bioavailability and limited solubility in aqueous media. Nature itself solves the problem of their insufficient solubility in water by formation of different conjugates, which is the general strategy to increase solubility of natural products in nature. In turn, the structures of triterpenes and triterpenoid acids offer several positions in their skeletons for relatively easy chemical transformations that may result in a synthesis of derived compounds with modified physico-chemical characteristics, leading mainly to the improved bioavailability. This Thesis will focus on designing and investigating glycoconjugates of triterpenes. Glycoconjugates represent one of the possible types of modifiers of triterpene skeletons. The C(3) and C(17) carbon centers of triterpenes, and additional C(28) carbon center of the triterpenoid acid skeleton, will become the most frequently employed carbon centers for structural modifications of these plant products. Possible ways for bonding structural modifiers of triterpenoids acids include glycoside bond, ether bond, ester bond, amide bond, a bond formed through a 1,2,3-triazol ring, and several miscellaneous types of bond used under specific occasions. The target compounds are expected to display biological activity (cytotoxicity and/or antimicrobial or antiviral activity). Potential self-assembly of the target compounds will be studied by several analytical (UV, VT-DOSY-NMR) and microscopic (SEM or TEM studied under laboratory temperature or under the cryo conditions) methods in collaboration with the foreign collaborating institutions.

Graphene synthesis by exfoliation of carbon nanotubes

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

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Experimental work is focused on the exfoliation of carbon nanotubes by oxidation or intercalation with alkali metals. Carbon nanotubes and synthesized graphene strips will be studied mainly by Raman spectroscopy, FTIR, STM, AFM and other advanced probe methods.

Green economy and its impacts, costs, and risks/prevention for OSHA

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

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The doctoral thesis will focus on the assessment of costs, impacts, and risks in occupational health and safety, caused by the growing green economy in the CR, i.e., circular economy, solar energy, aquaponics, and waste management. The aim is to create and test risk prevention models for a selected area of the green economy.

Growing Single Crystals and Structure Analysis of Multiple Component Crystals

Department: Department of Solid State Chemistry, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials
Theses supervisor: Ing. Jan Čejka, Ph.D.

Annotation

API's multiple-component crystals are a valuable option in modfying pharmacokinetic profile, stability of API etc. The application properties of any particular active compound are often rendered by means of the component is built in the structure. This work aims to prepare single crystals of salts, solvates, co-crystals and polymorphs of selected compounds, study potentional temperature dependent phase transitions, their complex characterization using a bundle of analytical methods accenting X-ray structure analysis and consequent correlation of parameters and solvent occupied voids.

Healthy adipose tissue: role of FGF21 signaling

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: MUDr. Jan Kopecký, DrSc.

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In all mammals including humans, two types of adipose tissue are recognized, white and brown adipose tissue (WAT and BAT, respectively), which are engaged in two major distinct and opposite functions: energy storage (in WAT) and energy dissipation (in BAT). Our recent studies are focused on “healthy adipocytes” in WAT, which are relatively small fat cells endowed with a high capacity for mitochondrial oxidative phosphorylation, triacylglycerol/fatty acid (TAG/FA) cycling and de novo lipogenesis. The “healthy adipocytes” could be induced in WAT by various factors that need to be better characterized. “Healthy adipocytes” provide beneficial local and systemic effects that could contribute to “metabolically healthy” obesity.FGF21 (Fibroblast growth factor 21) is a hormone secreted mainly from liver in response to stimuli such as fasting and ketogenic diet. Although its main physiological role is still a contested topic, FGF21 has become a promising therapeutic target for obesity and Type 2 diabetes mellitus due to its powerful body weight-lowering and insulin-sensitizing effects. The main aim of the PhD project will be detailed characterization of FGF21 effects in WAT of model animals, namely changes in gene expression and rate of lipolysis, de novo lipogenesis and TAG/FA cycling. Since these metabolic processes are known to be linked to preservation of healthy status of the tissue, their potential regulation by FGF21 could thus represent an important part of the mechanism of overall beneficial action of FGF21. Basic PhD scholarship will be supplemented by salary covered by grants of the Department.

Heavy metals removal from flue gas produced during combustion of coal

Department: Department of Gaseous and Solid Fuels and Air protection, Faculty of Environmental Technology
Study programme: Energie a paliva
Theses supervisor: doc. Ing. Karel Ciahotný, CSc.

Annotation

The work is focused on testing of adsorbents suitable to the mercury removal from the flue gases produced by the brown coal combustion. The goal is to find the optimal adsorbents to allow effective removal of mercury from power plant flue gases produced by combustion of the Czech Brown, to estimate their adsorption capacities for mercury under the conditions of power plant flue gas adsorption (high temperature and high humidity) and the possibility of the eventual regeneration of saturated adsorbents. The work is part of the grant project TACR.

Heterogeneous catalysts based on polymeric networks

Department: Department of Organic Technology, Faculty of Chemical Technology

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Functionalized polymer-based networks are used as catalysts in many reactions. Functional groups are incorporated into the network either in the form of a functionalized monomer (which is polymerized) or by post-polymerization modification. Appropriate functional groups direct the catalytic activity of the final material. The aim of the work will be the testing of polymer material in the chosen catalyzed reaction. The part of the work will be the material preparation, post-polymerization modification of the materials prepared within the cooperation with Charles University and detail catalyst characterization. Structural properties of materials will be correlated with catalytic properties.

High resolution microwave spectroscopy of complex organic molecules

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

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Subject of this thesis is focused on measurements of the advanced high-resolution rotation spectra of complex organic molecules and subsequently on quantum mechanics interpretation of experimental data in terms of the Hamiltonian matrix elements.

High temperature water electrolysis

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Martin Paidar, Ph.D.

Annotation

High temperature water electrolysis represents a modern technology closely related to the optimization of operational conditions of the traditional as well as novel high capacity power sources used nowadays to the stabilization of the electricity distribution grid. Stabilization requirement is caused by the strongly increasing capacity of the unstable renewable energy sources connected to the distribution grid.

High-entropy alloys prepared by powder metallurgy techniques

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: Ing. Filip Průša, Ph.D.

Annotation

Since the year 2004, the materials research gained a new way of focusing on special alloys made initially of five elements with equiatomic compositions. The newly discovered group of materials has been since then known as high-entropy alloys (HEA) due to a high entropy of mixing which allows creating predominantly solid solutions instead of intermetallic phases. These materials are known to be exhibiting a variety of excellent properties that often combine high strengths while maintaining good ductility, good corrosion resistance and others.
The work will aim at the description of the microstructure-related properties of high-entropy alloys prepared by powder metallurgy techniques combining mechanical alloying and compaction via spark plasma sintering.

High-throughput sequencing data processing for taxonomic and (meta)genomic analyses in microbial ecology

Department: Department of Informatics and Chemistry, Faculty of Chemical Technology
Study programme: Bioinformatika
Theses supervisor: doc. Ing. Ondřej Uhlík, Ph.D.

Annotation

With the advent of molecular-biological methods and new technologies such as high-throughput DNA sequencing, microbial ecologist have been enabled to study in detail the composition of microbial communities without the need of complicated isolation of individual species. These analyses are referred to as metagenomics and rely on the analyses of all genomes contained within an environmental sample. Application of these methods allow for analyzing of habitats which have not been chracterized previously. In the framework of this thesis, the student will analyze high-throughput sequencing data for the sake of taxonomic and (meta)genomic analyses, including the application of currently used as well as development of novel bioinformatics tools and pipelines with the aim to characterize microbial communities in soils and extreme habitats.

High-throughput transcriptomics platform

Department: Department of Informatics and Chemistry, Faculty of Chemical Technology
Study programmes: Bioinformatics, Bioinformatika
Theses supervisor: RNDr. Petr Bartůněk, CSc.

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The aim of the project is to develop a robust ultra-high-throughput sequencing platform and a bioinformatics pipeline for the analysis of gene expression in chemical biology and drug discovery. Platforms that are currently used in academic research and pharmaceutical development are limited by their high cost and low throughput. Therefore, we will establish a cost-effective high-throughput transcriptome profiling strategy with simplified sample preparation and multiplexing in 384/1536-well format. The transcriptional profiles will be correlated with the Mechanism of Action (MoA) of the analyzed compounds, which will facilitate mechanistic studies of novel compounds and their biological activities. The scheme can be combined with the CRISPR gene-editing methods to enable the discovery of gene functions in cells and organisms.

Highly efficient electrochemical CO2 reduction - inexhaustable source of simple organic molecules

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: prof. Dr. Ing. Karel Bouzek

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An electrochemical reduction of CO2 in "zero-gap" arrangement can be operated as a highly efficient process which in combination with renewable energy sources of represents an inexhaustible source of simple organic molecules such as formic acid, formaldehyde or methanol. These compounds represent basis of number of established technologies. Within the work, CO2 reduction will be investigated as well as individual components (electrodes, catalyst, membrane) of the electrolyser optimisation and its operation.

How does the presence of water influence the properties of functionalized ionic liquids

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programmes: Chemie, Chemistry
Theses supervisor: Ing. Magdalena Bendová, Ph.D.

Annotation

Functionalization of ionic liquids has extensively been studied over the past two decades because of their application potential in various fields of chemistry. However, unequivocal knowledge of structure-property relationships for ionic liquids and a good understanding of their interactions with molecular solvents are still far from being established. In this work, mixtures of various functionalized ionic liquids with water will thus be studied in terms of their phase equilibria and intermolecular interactions. Phase equilibria will be studied both by synthetic and dynamic methods, whereas the molecular structure at ambient temperature will be investigated by a range of diffraction and spectroscopic methods.

Hydratation and adsorption properties of waste aluminosilicates in water management

Department: Department of Solid State Chemistry, Faculty of Chemical Technology

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Aluminosilicates, together with e.g. powdered building waste, biochar, lignin are able to adsorb and keep a large amount of water compare to soils and sediments. The mixing of these materials with selected soils in controlled dosages can support water retention in soils, which is significant due to more and more often "dry periods" and generally lower precipitation. A controlled dosage of the material with high water retention to soil ecosystems can improve markedly a water regime and hydrological cycle.

Hydrocracking of refined pyrolytic bio-oils blended with petroleum vacuum distillates

Department: Department of Petroleum Technology and Alternative Fuels, Faculty of Environmental Technology
Study programme: Energie a paliva
Theses supervisor: Ing. David Kubička, Ph.D., MBA

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The thesis will focus on investigating the possibility of potential application hydro-stabilized bio-oil from biomass pyrolysis in hydrocracking of vacuum distillates. The subject of the research will study the effect of feedstock composition and reaction conditions (reaction temperature, pressure, excess hydrogen, catalyst properties) on the quantity, composition and properties of the products of hydrocracking. Attention will be focused on the study of reactions, which compounds in bio-oil are subjected during hydrocracking conditions.

Hydrogel microparticles mimicking red blood cells

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: RNDr. Ivan Řehoř, Ph.D.

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Red blood cell has a discoidal shape around 10 μm in diameter and circulates effortlessly through the bloodstream, although the capillaries are as thin as 5 μm. This unique ability is given by their shape, mechanical properties and surface. The aim of this project is to synthesize hydrogel microparticles that mimic these red blood cells properties. Stop-flow lithografy will be used for synthesis of blood cell-shaped hydrogels from biodegradable polymers of such composition, that the mechanical propperties of the particles will be similar to the real red blood cells. In the followup of this project, the ability of hydrogels to circulate in the bloodstream will be investigated. The ultimate goal of the project is to incorporate chemical fluorescent sensor monitoring medically relevant parameter (e.g. pH) into the microparticle and read its signal remotely through the skin using a detector placed outside the patients body.

Hydrogels and their nanocomposites

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: Ing. Jaroslav Tihon, CSc.

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Hydrogels are cross-linked polymers containing a large amount of water. They can be used, for instance, in medicine (contact lens, wound dressing materials, tissue engineering), and in vaste water treatment (they exhibit high adsorption ability for organic dyes). When suitable nanoparticles (mostly anorganic) are incorporated into a hydrogel structure, hydrogel nanocomposites are formed. They often exhibit even better physicaly-chemical properties than original hydrogels – typically their rigidity increases, and water swelling, pollutants adsorption or drug releasing ability changes. In this project, the preparation of novel hydrogel nanocomposites, their physicaly-chemical properties and potential using in the field of medicine and environmental engineering will be studied. The candidate should have a M.Sc. degree in chemical engineering, physical chemistry, or in a similar applied science field. Some experimental skill is appreciated. However, the enthusiasm for scientific work is only the principal requirement.

Hydrogen generation from water using solar light

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: prof. Dr. Ing. Josef Krýsa

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Production of hydrogen as an alternative energy source/carrier is becoming recently very important and intesively studied process. One of the promising options is direct production of hydrogen from water via solar light. The topic of the present thesis is the preparation of semiconductor photoanodes and photocathodes for photo-electrochemical water splitting. Different methods of preparation (aerosol pyrolysis, spray pyrolysis, etc. ) will be used and the resulting films will be characterised (XRD, GDS, UV-VIS, BET, SEM) and their photo-electrochemical properties (open circuit potential, photocurrent, IPCE) evaluated. The attention will be given to the influence of composition, crystalline phase, layer thickness and porosity. The best photoanode and photocathode layers will be applied in the tandem solar photo-electrochemical cell and its efficiency for water decomposition to hydrogen and oxygen by sunlight will be determined.

Hydrogenation of aldol condensation products

Department: Department of Petroleum Technology and Alternative Fuels, Faculty of Environmental Technology
Study programme: Energie a paliva
Theses supervisor: Ing. David Kubička, Ph.D., MBA

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The thesis will deal with hydrogenation of products obtained by aldol condensation of e.g. furfural with acetone or cyclohexanone. These products are highly functionalized which makes their selective conversion into components of aviation biofuels or bio-monomers highly challenging. The key aspect is the development of a stable and selective bifunctional catalyst that will allow obtaining high yields of desired hydrocarbons or diols. Main attention will be focused on synthesis, characterization and testing of catalysts with the aim to describe the relationship between catalyst’s composition and properties, on the one hand, and its activity and selectivity, on the other hand, and facilitate thus rational design of an optimum catalytic system.

Hydrogenolysis of unsaturated esters using innovative chrome-free catalysts

Department: Department of Petroleum Technology and Alternative Fuels, Faculty of Environmental Technology
Study programme: Energie a paliva
Theses supervisor: Ing. David Kubička, Ph.D., MBA

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Hydrogenolysis of unsaturated esters is an important industrial petrochemical process that relies on the use of the classical ZnCr hydrogenolysis catalysts. These catalysts, particularly their production, are a significant environmental threat. The goal of the doctoral thesis is research of alternative heterogeneous catalysts that are chrome-free and at the same time have activity and selectivity comparable to the current commercial ZnCr catalysts. Main attention will be thus focused on the synthesis, characterization and testing of the catalysts to describe relationship between composition and properties of a catalyst, on the one hand, and its activity and selectivity, on the other hand, to facilitate the replacement of the ZnCr catalysts.

Hydroprocessing of pyrolysis oil from waste plastics and tires

Department: Department of Petroleum Technology and Alternative Fuels, Faculty of Environmental Technology
Study programme: Energie a paliva

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More than 400,000 tons of waste plastics is produced each year in the Czech Republic. Approximately 37 % is recycled and 18 % is used for energy recovery (production of heat and electricity). The rest, around 45 % of all plastic waste, is not used in any way. Pyrolysis is one of the suitable ways for utilization of waste plastics and tires. The liquid product obtained from pyrolysis, called pyrolysis oil or pyrolysate, has to be hydroprocessed prior to its processing by standard refinery technologies. The thesis will deal with mild and severe hydroprocessing of pyrolysates produced from waste plastics and tires. The experiments will be carried out in testing catalytical unit with fixed catalyst bed. Activity of various catalyst will be compared and influence of reaction conditions on composition of gas and liquid reaction products and their physicochemical properties will be examined.

Identification and quantification of various drug forms using THz spectroscopy

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

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Advanced Terahertz Spectroscopy which is able to measure special vibrational transitions reflecting the weak inter- and intra-molecular interactions, makes also possible to recognize various polymorphic forms of pharmaceuticals. By this technique, the different procedures of the drug fabrications (counterfeits), ageing etc. can be examined.

Identification of biomarkers of cancer and degenerative diseases via molecular spectroscopy of biofluids

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

Identification of sources of human exposure to new groups of food and environmental contaminants

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology

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The thesis will be focused on the development of analytical procedures for monitoring new groups of organic contaminants of food and environmental comparments. Analytical methods based on gas and/ or liquid chromatography coupled with mass spectrometry will be implemented. The developed procedures will subsequently be applied in studies to assess the level of contamination of food and environmental samples by these pollutants, the main sources of human exposure will be identified and potential health risks for consumers related to the pollutants monitored.

Immobilization of metal nanostructures on polymer carriers

Department: Department of Solid State Engineering, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials
Theses supervisor: doc. Ing. Jakub Siegel, Ph.D.

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Experimental work aimed at preparation of metal nanostructures and development of methods of their immobilization on polymer carriers for the next generation of antimicrobial surfaces. Both physical and chemical methods of nanostructures immobilization will be emploied, based on interaction of prepared nanostructures with laser light or chemical agents. Antibacterial effects and biocompatibility of developed surfaces will be evaluated in cooperation with the Department of biochemistry and microbiology UCT Prague.

Impact of protein properties on its aggregation behavior and stability during lyophilisation

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

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Protein stability and formation of aggregates is of paramount importance when considering intravenous delivery route. Therefore, this project will be covering al key steps in formation of injectable protein dosage. In collaboration with our university partner we will start from production of proteins with precisely defined modifications of amino acid sequence. In this way we will be able to prepare peptides or proteins with hydrophilic and hydrophobic moieties. Consequently we will study their colloidal behavior under various conditions by varying protein concentration, ionic strength, type or ions, presence of stabilizing agents etc. In the next step we will perform lyophilisation of prepared samples under various conditions with or without cryo protective agents and controlled freezing step followed by the analysis of reconstituted product. Analysis will be done by several techniques including dynamic and static light scattering, XRD, SAXS NMR, TEM, calorimetry and circular dichroism. Gained knowledge will be used in optimization of conditions for preparation of injectable protein products.

Impact of the magnetism on the thermoelectric properties of oxides and sulfides

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

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Thermopower can be very sensitive to spins and magnetism, and its enhancement has already been observed in oxides, as exemplified in NaxCoO2 or in misfit cobaltites. Recently, the impact of magnetism has been evidenced in ferromagnetic and metallic CoS2 with an extra contribution to thermopower measured in the. In the insulating thiospinel CuCrTiS4, the transport properties are actually very similar to magnetoresistant oxides, with variable range hopping transport associated to a large negative magnetoresistance and magnetothermopower. The aim of this project is to investigate the influence of magnetism on the thermoelectric properties of these sulfides presenting different ground states, to tune and optimize this enhancement of thermopower. A detailed investigation of the thermal properties will also be realized.

Impedance spectroscopy of organic nanostructured semiconductors

Department: Department of Computing and Control Engineering, Faculty of Chemical Engineering

Improving the nutritional value of deep-fried foods in terms of risky fats

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Dr. Ing. Marek Doležal

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Vegetable fats and oils differ in their thermal stability and resistance to undesirable oxidation, polymerization or hydrolytic reactions. Oils and fats with higher content of saturated fatty acids and lower content of polyunsaturated fatty acids show higher stability, which is important for deep-frying. But nutritional recommendations advise the opposite - to reduce the intake of saturated fatty acids in the diet and increase the consumption of unsaturated fatty acids. From this point of view, it is necessary to seek compromises, for frying and deep-frying to choose fats with a lower content of saturated fatty acids, but with sufficient thermal stability, which may also affect the content of antioxidants. Changes in oils are also reflected in the taste of fried foods. Part of the work will be the monitoring of the oxidative stability of vegetable fats and oils in order to find out what changes in the oils take place during repeated deep-frying and how this will affect the taste of fried foods. Attention will be paid to the effect of selected antioxidants and anti-foaming agents.

Inactivation of microorganisms and removal of persistent pollutants in waters by advanced oxidation processes

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: prof. Dr. Ing. Josef Krýsa

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Systems UV/hydrogen peroxide (either continuously added or generated in situ electrochemically) and UV/photocatalyst will be compared. Several gram positive (Escherichia coli, Pseudomonas aeruginosa) and gram negative (Enterococcus faecalis, Staphylococcus aureus) microorganisms will be studied either separately or in the mixtures. All are commonly found in the waters and furthermore model well microorganisms (Pseudomonas …..and Staphylococcus……..) which are i) present often in the swimming pool waters ii) are more resistant to disinfectants or iii) create easily biofilms. Conditions of both processes will be optimised to achieve the highest efficiency. Processes will be used also for the removal of the model water pollutants. As a next step optimised systems will be applied for real waters.

Individual and class identifications of persons based on digitally encoded human scent signatures

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

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Subject of this thesis is focussed on detailed analyses of human scent samples using GCxGC-TOF, on their digitizing and, above all, on the development of advanced olfactronic methods of individual as well as class identifications of persons.

Influence of Corrosion Products on Hydrogen Absorption to High Strength Steel

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: Ing. Tomáš Prošek, Ph.D.

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This project originates from industrial projects on hydrogen embrittlement (HE) of high strength steels, which are especially prone to hydrogen(H)-induced degradation. Since the development of these advanced steel grades with a huge potential of material and energy savings in many fields of human activity, the number of industry-funded studies on HE has been rising significantly. However, their practical focus does not allow for studying underlying mechanisms, although they are crucial for future development of products with improved application properties. This work aims at fundamental understanding of atmospheric corrosion as source for H insertion into iron, the principal element of all steel grades, as well as into selected steel grades. The role of corrosion products (CPs) in the H insertion during atmospheric corrosion will be clarified: How do composition and structure of CPs affect corrosion processes in view of H adsorption and absorption by e.g. reactions that involve a change of pH or a ratio between H reduction and other depolarization reactions? Which atmospheric conditions trigger these reactions? What is the mechanism of atomic H formation and entry?

Influence of hydrogen in natural gas on the gas infrastructure

Department: Department of Gaseous and Solid Fuels and Air protection, Faculty of Environmental Technology
Study programme: Energie a paliva

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The thesis is focused on the study of different hydrogen content in natural gas and its influence on the gas infrastructure. At present, hydrogen is intended to be added to natural gas either as a pure gas or for example as a part of the gas produced by the catalytic hydrogenation of carbon dioxide. The issue of adding hydrogen to natural gas involves, in particular, mixing of hydrogen with natural gas in the pipeline system, influence on the calorific value and combustion properties, influence on the measuring and analytical systems, sealing systems, influence on natural gas compression at compressor stations, reduction of transport capacity, reduction of methane number or limiting factors during the storage of hydrogen - natural gas mixtures.

Influence of radiolysis and bacterial extremophiles on lifetime of canister for radioactive waste repository

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Jan Stoulil, Ph.D.

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The work will be focused on the influence of bentonite pore solution radiolysis by gamma radiation on the oxidation ability, stability and semiconductive properties of passive layer on the 316L stainless steel. In addition will be studied the possibility of the formation of sulphate-reducing bacteria biofilm and the effect of metabolites on the susceptibility to pitting and stress corrosion cracking.

Inhibitors of viral methyltransferases

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: Mgr. Radim Nencka, Ph.D.

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Viral methyltransferses (MTases) play an essential role in the capping of the newly synthesized viral RNA during the replication process. In flaviviruses, the cap usually consists of 7-N-methylated guanosine 5’- triphosphate and 2’-O-methyladenosine and the MTases are responsible for methylation of both guanosine nucleobase and adenosine sugar moiety. The project will be focused on the synthesis of novel inhibitors targeting these enzymes, which are highly conserved among numerous flaviviruses that are responsible for important human diseases such as tick-borne encephalitis, Dengue, West Nile and Yellow fevers.

Injectable biomimetic hydrogels for regenerative medicine

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Vladimír Proks, Ph.D.

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The in situ formed biomimetic hydrogels represent very attractive class of biomaterial scaffolds for regenerative medicine. Up to date, no injectable biomaterials that would allow full tissue regeneration are available. Development of biomaterials imitating ECM regeneration in the body would be useful for various types of surgical and orthopaedic procedures. The aim of the project is to design injectable, in situ formed hydrogels that could be used as an artificial ECM environment for matrix-assisted cell therapy and tissue regeneration. The dissertation will focus on design, synthesis and study of physicochemical properties of polymeric precursors based on synthetic polypeptides and natural polysaccharides. Furthermore, a gelation protocol will be developed to establish a hydrogel network, which could ensure mechanical protection of cells from shear forces and promote cell retention and engraftment. Hydrogels will be modified with biomimetic structures, e.g., cell-adhesion peptides that would promote specific interactions with cells and growth factors. Knowledge and skills in macromolecular and organic chemistry is expected as well as willingness to improve knowledge in biochemistry and biology. Student will learn various techniques and methods using modern measuring instruments.

Innovation for the Environmental and Economic Sustainability of Mobility

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

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The dissertation thesis is focused on innovation decision-making for environmental and economic sustainability of mobility. Given the geopolitical specifics and uncertainty of the environment, a scenario approach with respect to a long period is necessary. The aim is to create a normative model for companies operating in this sector, which should help them in deciding on investment in innovation in this area.

Innovation of foods based on lactic acid fermented vegetables and fruits

Department: Department of Food Preservation, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Ing. Aleš Rajchl, Ph.D.

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Lactic acid fermented foods are known for centuries. Thanks to its long sustainability, increased nutritional value, required sensory properties and also unpretentious and cheap preparation have become very popular worldwide. This work is focused on the preparation of lactic acid fermented vegetable and fruit products and on the possibilities to enlarge the range of these products. Specifically, a fermentability of individual types of vegetables or fruits, including its mixtures, will be determined with respect to sensory properties of the final products. The effect of addition of probiotic and starter cultures will be estimated according to selected qualitative properties of the products. During fermentation processes characteristic changes will be monitored through the chemical, microbiological and sensory parameters.

Innovative Synthesis and Process Development of Selected Active Pharmaceutical Ingredients

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials
Theses supervisor: prof. Ing. Radek Cibulka, Ph.D.

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Pharmaceutical companies are constantly looking for innovative, cost-effective synthetic pathways for API preparation. The development of APIs generally requires a multidisciplinary approach combining state-of-the-art knowledge of organic chemistry, clarifying and preparing the structure of impurities, screening activities in solid form, and process development. The work will be focused on the development of new synthetic methods and will be carried out in cooperation with the pharmaceutical company Zentiva.

Innovative air purification procedures

Department: Department of Environmental Chemistry, Faculty of Environmental Technology
Theses supervisor: doc. Dr. Ing. Martin Kubal

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The main goal of the dissertation thesis will be the research of the removal of unwanted air components using innovative methods including especially photocatalysis and a combination of photocatalysis and cold plasma. In particular, organic substances produced as part of chemical production and biological waste treatment will be removed.

Innovative strategies for food fraud detection and authentication

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology

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The doctoral thesis realized within the international project will focus on the application of advanced instrumental techniques, mainly high resolution mass spectrometry, for analysis of food raw materials, products thereof and food supplements. To detect food fraud and authentication of examined samples, a novel strategy based on comparison of recorded ´fingerprints´ and selected biomarkers profiles with those saved in database established on well characterized, authentic samples will be applied. The assessment of health risks associated with food fraud will be a part of the project

Inorganic analogues of graphene - silicene, germanene and their derivatives

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

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This thesis is focused on the development of new methods for the synthesis of inorganic graphene analogues with subsequent study of their reactivity and possibility of their derivatisation. Synthetic methods will be focused on the development of new ways of chemical exfoliation of layered Zintl phases. The synthesized materials will be studied for their application in catalysis (photocatalysis, electrocatalysis) and microelectronics (luminescent structures).

Inorganic carriers of active pharmaceutical ingredients

Department: Department of Solid State Chemistry, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials

Annotation

The work is focused on development of new solid dosage forms. Release of active pharmaceutical ingredient can be considerably affected after its incorporation into a carrier; the stability of API against degradation can be improved as well. Methods suitable for incorporation of drugs poorly soluble and insoluble in water into layered inorganic and hybrid inorganic-organic carriers will be studied. The back release of incorporated active pharmaceutical ingredients in simulated body fluids will be also examined.

Inorganic fillers and sorbents

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Petra Ecorchard, Ph.D.

Annotation

Within the projects we studied various types of fillers for polymer matrix, based on graphene and its derivatives and on double layered hydroxides in combination with ionic liquids. During the dissertation, the focus would be given on the development of individual types of 2D materials with specific properties, e.g., conductivity, mechanical, catalytic, photocatalytic. Inorganic fillers will be modified with suitable ionic liquids, which may have multiple functions and will be chosen accordingly to the subsequent use. Modification will be possible with commercially available ionic liquids or newly prepared ionic liquids. These materials are often good sorbents, for this reason these properties will be also studied for sorption of heavy metals or organic contaminants.

Integration of Risk and Uncertainty into Investment Decisions in Selected Industrial Sectors in Relation to Environmental Protection

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

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The dissertation thesis is focused on the integration of risk and uncertainty into investment decisions in selected sectors of industry in relation to environmental protection. Given the long-term investment, attention must be paid to the long-term effects; the scenario approach is necessary while respecting the specificities of the sector (industry). The aim is to create a normative model that respects scenario approaches, uncertainty in the environment, multi-criteria decision-making processes and sector specificities.

Integration of phenotyping and functional genomic data

Department: Department of Informatics and Chemistry, Faculty of Chemical Technology
Study programmes: Bioinformatics, Bioinformatika
Theses supervisor: Vendula Novosadoivá

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The position of bioinformatician is becoming necessary for every scientific group. Generating large datasets of omic data makes it necessary to develop new computational algorithms using tools such as machine learning and artificial intelligence, which will also allow the processing of diverse unstructured data. Our group is part of the research infrastructure Czech Centre for Phenogenomics, involved in the systematic annotation of the mouse genome within the International Mouse Phenotyping Consortium (IMPC). We produce mouse lines with one gene deactivated. These lines are further characterized by a standard phenotyping pipeline. The data set from each animal tested has over 700 parameters from different fields. These parameters contain numeric, categorical and image data. We are also collecting metabolomic data for selected lines. The Ph.D. project aims to integrate every data generated both in our center and within the whole IMPC. Linking individual parameters and finding correlations and causality between them and their possible semantic analysis will help to better understand the phenotype. At the same time, knowledge of a given gene function will enable mathematical modeling of the phenotype of genes involved in similar or overlapping regulatory networks.

Intelligent materials and surfaces - switching between "ultra" states

Department: Department of Solid State Engineering, Faculty of Chemical Technology
Theses supervisor: Mgr. Oleksiy Lyutakov, Ph.D.

Interaction of nucleic acids with proteins of RNA viruses

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Tomáš Ruml, CSc.

Annotation

Specific genome recognition is a key step in the life cycle of all viruses. For most RNA viruses, the mechanism of this process is not yet elucidated. Moreover, in retroviruses, nucleic acids affect the intracellular transport of structural proteins by neutralizing their basic charge. The aim of this work is to identify and characterize motifs responsible for the interaction of nucleic acids and viral proteins in selected retroviruses and flaviviruses. The work includes a combination of methods of molecular biology and virology combined with structural, proteomic and bioinformatic analysis.

Interaction of selected tracers with cementitious materials

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

Interactions of flaviviral genomic RNA with viral proteins

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie
Theses supervisor: doc. Dr. Ing. Michaela Rumlová

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Flaviviruses are RNA viruses whose representatives, for example DENV, ZIKV, or TBEV, cause a variety of very serious illness. For successful replication within the infected cell, the flavivirus proteins must recognize and bind viral genomic RNA to assemble a nucleocapsid. The structural mechanisms leading to this step; however, remain unknown. The main objectives of this dissertation are (i) the characterization of the structural-functional motifs of flaviviral genomic RNA critical for the recognition, packaging and assembly of nucleocapsid, as well as (ii) the analysis of the flaviviral proteins involved in this process. For this purpose, a wide variety of modern experimental approaches will be used: molecular-genetic approaches such as cloning, PCR, mutagenesis to prepare DNA constructs, in vitro RNA transcription, expression of recombinant proteins in bacterial and mammalian cells, protein purification, immunoprecipitation associated with RNA sequencing (iCLIP), fluorescence anisotropy, optical tweezers technique, transmission electron microscopy and other.

Interfacial energy of crystals by molecular dynamics

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Theses supervisor: prof. RNDr. Jiří Kolafa, CSc.

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The aim is to elaborate the methodology of calculation of the interfacial energy in classical molecular dynamics simulations (by the "cleaving" method) and to determine the interfacial energy of models of ice and NaCl in solution. In addition, to se the results to determine the equilibrium crystal shape by the Wulff construction and optionally compare to a direct simulation.

Interpretation of Raman optical activity of nuclei acids

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Theses supervisor: prof. RNDr. Petr Bouř, CSc.

Annotation

Spectroscopy of vibrational Raman optical activity is a new and dynamically evolving analytical method providing important information, such as about biopolymer and enzyme structure. The applications are very dependent on spectral interpretations based on the molecular dynamics and quantum chemical computational methods. For nucleic acids, although experimentally very interesting systems can be approached, including viruses, the relation between the spectrum and the structure is not completely known. A big problem are computer demands required by these complex and big molecules. We will therefore focus on development of experimental and computational methodology for model system, suitable to describe specific nucleic acid properties, such as flexibility and polarity. Modern computational methods will be both used and developed, such as combination of classical and quantum mechanics or testing models of solvent and environment during molecular interactions.

Investigating customised functional molecules by the state-of-the-art cryogenic scanning probe microscopy.

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Zdeněk Starý, Ph.D.

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You will be given the chance to discover and map the character of custom-created organic molecules using a very special type of scanning probe microscope working at cryogenic temperatures with picometer precision. This project aims on exploring novel on-surface chemistry strategies to overcome traditional synthesis limitations and on finding novel functional molecules that will have a unique chemical, electronic and photonic response, which all can be measured using this type of experimental instrument.

Investigation of the relationship between amorphous solid dispersion physical stability and polymer functionality: experimental and theoretical predictions

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Study programmes: Chemie, Chemistry
Theses supervisor: prof. Ing. Michal Fulem, Ph.D.

Investigation of water electrolysis with proton exchange membrane

Department: Department of Inorganic Technology, Faculty of Chemical Technology

Annotation

Water electrolysis represents an important part of the hydrogen economy considered nowadays as a promising approach to the future securing of the human society with electrical energy. Industrial water electrolysis processes established today suffer from several disadvantages when considering its application in the field of energetics. It is mainly its low efficiency and flexibility. Therefore, this process is a subject of interest of numerous research laboratories around the globe. Electrode reaction kinetics, suitable polymer electrolytes and overall process design represent the main issues studied. Corrosion stability of the individual construction materials is also an issue.

Isolation of biologically active compounds from Sutherlandia and identification of their molecular structure

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programmes: Chemie, Chemistry

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Sutherlandia plants have been identified as being useful in the treatment of various diseases. The aim of this work is to isolate new biologically active substances, to identify their molecular structure using high-resolution NMR and MS, and to describe their biological activity in cooperation with screening centres.

Kinetics of catalytic decomposition of N2O on zeolite catalysts

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Dr. Ing. Vlastimil Fíla

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The topic of this work is the study of kinetics of N2O decomposition on zeolitic (MFI, FER) and titano-silicates catalysts involving Fe and other transition metals. The work will be focused on kinetic experiments in aiming to develop reliable kinetic model suitable for desing of industrial equipment.

Large deformations of ceramic powder compacts and fracture of porous and cellular ceramics

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

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Large deformations play a significant role in ceramic technology, because all pressing operations rely on the quasi-plastic behavior of powder systems during consolidation. On the other hand, also porous and cellular ceramics, including those produced via additive manufacturing, e.g. 3D printing, exhibit quasi-plastic behavior during compression. This PhD topic combines theory-based analytical modeling and computer-based numerical modeling of large deformations with real-world experiments performed on ceramic materials via different mechanical tests, mainly axial and diametral compression. The student is required to have a solid background knowledge in ceramic science and technology as well as the ability to combine computer modeling with experimental work on real materials from both fine and coarse ceramics.

Large deformations of ceramic powder compacts and fracture of porous and cellular ceramics

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

Annotation

Large deformations play a significant role in ceramic technology, because all pressing operations rely on the quasi-plastic behavior of powder systems during consolidation. On the other hand, also porous and cellular ceramics, including those produced via additive manufacturing, e.g. 3D printing, exhibit quasi-plastic behavior during compression. This PhD topic combines theory-based analytical modeling and computer-based numerical modeling of large deformations with real-world experiments performed on ceramic materials via different mechanical tests, mainly axial and diametral compression. The student is required to have a solid background knowledge in ceramic science and technology as well as the ability to combine computer modeling with experimental work on real materials from both fine and coarse ceramics.

Layered double hydroxides as sorbents for biologically active substances

Department: Department of Organic Technology, Faculty of Chemical Technology
Theses supervisor: Ing. Iva Paterová, Ph.D.

Annotation

Double layered hydroxides, also known as hydrotalcite or anionic clays, are an important group of materials with a wide range of applications. They can be applied as catalysts, catalyst precursors or ion exchangers, in sorption and decontamination processes. They can also be used for the intercalation of various substances including drugs. The aim of this work will be to prepare these materials, modify their surface with silanol based compounds and to characterize them by suitable methods. The prepared materials will be used as support materials for the immobilization of selected active substances.

Layered forms of silicon and germanium and their optical properties

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

Annotation

The fast-growing family of layered materials based on silicon and germanium possess unique optical properties which are strongly dependent on their surface functionalization. This work will be focused on chemical modifications of the surface of silicon and germanium layers and the influence of introduced functional groups on their luminescent properties. The optimized materials will be tested for electronic applications with a focus on hybrid LEDs and solar cells. Further, student will investigate a compatibility of synthesized 2D nanomaterials with organic semiconductors for a preparation of the hybrid optoelectronic heterostructures.

Leaks flanged connections for various gaseous media

Department: Department of Gaseous and Solid Fuels and Air protection, Faculty of Environmental Technology
Study programme: Energie a paliva

Annotation

The thesis is primarily focused on the study of gas leakages through flange connections for helium systems in the concept of the IV. generation nuclear reactors. Nevertheless, part of the work will focus also on testing leakages of other gaseous media, especially natural gas or hydrogen. Except gas leakage testing over different sealing materials, penetration tests of permanent gases into the piping system under increased pressure and elevated temperatures will be executed.

 Life Cycle Assessment of bio-energy and biochemicals production

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

Annotation

Bio-based products are promising materials and fuels whose production and use will grow in the coming years. Although I can reduce these environmental burdens from traditional fossil materials and fuels, bio-based products can represent other forms of environmental burdens. The aim of this thesis is to create a conceptual tool for environmental impact assessment of bio-based products taking into account their entire life cycle.

Life cycle assessment of logistics

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

Annotation

The environmental aspects of logistics should be one of the criteria taken into account by project planners. The LCA method makes it possible to compare the environmental impacts of different anthropogenic stressors with respect to the entire life cycle of the product, technology or service. Environmental impacts can be assessed globally or locally, but mainly either in general or with a focus on the site. This work will focus on the creation of a methodology for the identification and presentation of environmental aspects of logistics.

Machine Learning in Computational Spectroscopy

Department: Department of Physical Chemistry, Faculty of Chemical Engineering

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Artificial intelligence and machine learning approaches have recently witnessed a massive development in various fields of science and technology. In the suggested thesis, the candidate will apply these techniques into the field of computational spectrsocopy with a focus on electronic spectroscopies. For more information, see http://photox.vscht.cz

Mass spectrometry imaging of bioactive compounds

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie
Theses supervisor: doc. Dr. RNDr. David Sýkora

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The work will be directed to the development and optimization of MALDI mass spectrometry imaging (MSI) methods for visualization of drugs and lipids in tissue slices of laboratory mice and rats. Various methods of sample preparation procedures will be evaluated and compared. The optimized methods will be used to characterize changes in lipid composition in mouse models of neurodegeneration. The influence of potential novel neuroprotective drugs on the lipid content and composition versus controls will be also evaluated.

Matematické modelování mikrofluidních separátorů pro dělení racemických směsí

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Annotation

Microfluidic devices are characterized by a large ratio of interfacial area to internal volume. This can be used in chemical separations by extraction or membrane processes. Separation of optically active substances, often important pharmaceutical or food products, at membranes or sorbents with anchored chiral selectors represents a great challenge for chemical engineers. Mathematical modeling can lead to a better understanding of complex processes in such devices and consequently to the design of efficient microfluidic separators. The main objectives of the PhD project are: Based on preliminary and available experimental data, a mathematical-physical description of mass and momentum transport in microfluidic devices with anchored chiral selectors will be developed. Mathematical models of processes on different spatial scales will be created. They will include description of transport of the separated chemicals by diffusion, convection and electromigration. Models will be analyzed numerically. Parameter values that ensure high separation efficiency and high productivity of the microfluidic system will be searched in the parameter space. The lab is equipped with modern computers. The participation of the doctoral student in grant projects and active participation in international scientific conferences is expected.

Material Recycling of Waste Rubber

Department: Department of Polymers, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: Ing. Zdeněk Hrdlička, Ph.D.

Annotation

Among various ways of waste rubber disposal, the importance of so called material recycling is very perspective nowadays. Material recycling consists in rubber milling and the further application of the rubber crumb or powder, e.g. as a component of rubber compound based on fresh rubber or as an elastic component of thermoplastic elastomers. To achieve desirable physico-mechanical properties, a range of factors is important. The thesis will study, for instance, the influence of milling method, particle shape and size, chemical and physical treatment of the rubber powder before mixing and technological parameters of the mixing on the product properties.

Materials for quantum memories and computers

Department: Department of Solid State Engineering, Faculty of Chemical Technology

Mathematical Modelling of Electrochemical Cells

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: prof. Dr. Ing. Juraj Kosek

Annotation

The advancement of renewable energy sources (wind turbines and photovoltaics) as well as electric cars poses challenging requirements on the storage of electric energy either in stationary distributed storage systems or in batteries with high specific energy providing sufficient power. The development of technically, ecologically and economically acceptable solutions for the above mentioned applications is mostly empiric. The objective of this project is the development of models of electrochemical cells that will improve our understanding of practical limitations of various cells, enable the testing of various hypotheses and enable the systematic development of improved cells. This Ph.D. project is connected with the experimental research and development in our laboratories. By solutions of modeling equations we are going to obtain concentration and electric potential profiles as well as load and discharging characteristics of various batteries. We shall concentrate on following electrochemical systems: (i) redox-flow batteries, (ii) classical lead cells, and (iii) zinc-air secondary batteries and fuel cells. Mathematical modeling will employ also meso-scale spatially 3D models developed by former Ph.D. students. For example, we shall simulate oxygen transport and reduction in the porous air electrode of zinc-air battery or the dendritic deposition of zinc. The prospective Ph.D. student will become familiar not only with advanced 3D modeling techniques but also with thermodynamics of concentrated electrolytes, transport of ions, description of porous and pasted electrodes, effects of partial solubility of species in electrochemical cells, phase changes at electrode surfaces etc. The student will closely cooperate not only with colleagues from our laboratories but also with partners from companies and other universities.

Mathematical modeling of microfluidic devices for separation of racemic mixtures

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Annotation

Microfluidic devices are characterized by a large ratio of interfacial area to internal volume. This can be used in chemical separations by extraction or membrane processes. Separation of optically active substances, often important pharmaceutical or food products, at membranes or sorbents with anchored chiral selectors represents a great challenge for chemical engineers. Mathematical modeling can lead to a better understanding of complex processes in such devices and consequently to the design of efficient microfluidic separators. The main objectives of the PhD project are: Based on preliminary and available experimental data, a mathematical-physical description of mass and momentum transport in microfluidic devices with anchored chiral selectors will be developed. Mathematical models of processes on different spatial scales will be created. They will include description of transport of the separated chemicals by diffusion, convection and electromigration. Models will be analyzed numerically. Parameter values that ensure high separation efficiency and high productivity of the microfluidic system will be searched in the parameter space. The lab is equipped with modern computers. The participation of the doctoral student in grant projects and active participation in international scientific conferences is expected.

Mathematical modelling of chemical and membrane processes using universal simulation programs

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Dr. Ing. Vlastimil Fíla

Annotation

Universal simulation programs introduce a tool suitable for design of new and optimization of existing industrial technologies. In the frame of this work the static and dynamic models of selected advanced membrane and/or chemical technologies or their parts will be developed using universal simulation programs. By the help of them and computer experiment the behavior of these technologies will be studied. Verification of developed models by experimental data will be implemented. Aim of the work is the improvement of economic and ecological technological parameters. The universal simulation programs from Aspen Technology will be used preferentially.

Mathematical modelling of membrane separation processes

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Dr. Ing. Vlastimil Fíla

Annotation

Membrane separation processes represent the perspective and energy-saving alternative with respect to the present separation processes. Mathematical modeling introduces a tool helping not only understanding and evaluation of experimental data but also the tool suitable for the design of new and optimization of existing industrial technologies and transfer the laboratory results to industrial practice. In the frame of this work the own static and dynamic models of selected advanced membrane technologies or their parts or apparatuses will be developed using the common programming language. The potential future application of developed models in universal simulation programs is expected. By means of using these models in universal simulation programs and computer experiments, the behavior of these technologies will be studied. The verification of developed models by experimental data will be implemented. The aim of the work is the improvement of economic and ecological parameters of technology. The universal simulation programs from Aspen Technology will be used preferentially.

Mathematical modelling of the electrochemical systems

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: Ing. Roman Kodým, Ph.D.

Annotation

Mathematical modeling represents an extraordinary powerful tool for deeper understanding of the electrochemical units function and their subsequent optimization. Within the framework of this project the attention will focus on the mathematical description of the local potential and current density distribution. Subsequently the problem of the mass transfer in an electric field will be studied. The models formulated will be implemented to simulate systems with a practical impact.

Mathematical models of composite materials prepared by dispersing solid particles of a filler in a liquid polymer matrix

Department: Department of Organic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Pavel Čapek, CSc.

Annotation

The work is aimed at the mathematical modelling of composite materials, the preparation of which includes the creation of a suspension of solid particles in a liquid mixture of a solvent and a polymer precursor, volume contraction of the suspension caused by evaporating the solvent and by forming a solid polymer matrix. The initial suspension is modelled using the random sequential addition of particles of various shapes. Then, the motion of particles of the filler in the shrinking suspension is simulated. Each model microstructure and the corresponding microstructure of the real composite material sample are characterised using statistical measures and these measures are subsequently compared with each other for the quality of the model to be evaluated. The real microstructures are deduced from digital images of their polished sections that are observed using a scanning electron microscope.

Mechanical properties of biomedical titanium alloys processed by advanced powder metallurgy and additive methods

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Pavel Novák, Ph.D.

Annotation

Innovative methods of powder metallurgy, such as melt atomization and mechanical alloying for powder production and spark plasma sintering and hot isostatic pressing for its consolidation enable to obtain fine-grained materials with improved yield strength and hardness. On the other hand, the additive manufacturing (3D printing) technologies have the ambition to reach the net-shape products in a single processing step without the need of extensive machining, while maintaining the properties at least similar to common cast or wrought materials. Due to the large variety of possible process parameters, the systematic description of their influence on structural features and resulting properties was not done yet. Therefore this work aims to describe the relationship between the microstructure, mechanical properties (especially tensile strength, fatigue and wear behaviour) of titanium alloys for medical implants processed by spark plasma sintering of gas atomized powder and by 3D printing using the same powder using various conditions of the processes.

Mechanism of atmospheric low-temperature stress corrosion cracking of stainless steel

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: Ing. Tomáš Prošek, Ph.D.

Annotation

Stainless steel materials provide excellent service when selected and applied properly. Sufficient knowledge base is generally available for material selection for immersion conditions. This is not true for applications of stainless steels under atmospheric weathering conditions. Several cases of ceiling collapse and other component failures have shown that austenitic stainless steels are prone to stress corrosion cracking (SCC) under specific atmospheric conditions characterized by the spontaneous formation of concentrated chloride solutions under highly soluble chloride deposits even at room or only slightly elevated temperatures. This was observed in indoor swimming pools, for outdoor climbing anchors and under evaporative conditions in oil and gas production, storage, and processing. Currently, the Safety Commission of Union Internationale des Associations d'Alpinisme (UIAA) is preparing a new standard, which will classify climbing anchors into classes according to their resistance to SCC and/or corrosion. To support the standard preparation, deeper understanding into the degradation mechanism of stainless steels under relevant conditions is necessary. Factors influencing the SCC initiation and propagation such as the composition and concentration of deposits, tensile stress, role of crevices and aggressive ion accumulation, rock chemistry, periodic washing, stainless steel composition and microstructure and others will be systematically studied. In particular, in situ experiments will be carried out using X-ray micro tomography (μ-CT), which will allow for real time monitoring of crack initiation and propagation. In addition, outdoor exposures of numerous stainless steel grades and alternative materials organised around the world by UIAA will be followed and supported by failure analyses and specific measurements and tests.

Mechanism of photocatalytic degradation of selected biologically active water pollutants

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: Ing. Martin Kuchař, Ph.D.

Mechanism of the formation of intermetallics in mechanical alloying

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Pavel Novák, Ph.D.

Annotation

Mechanical alloying is a popular technology for the preparation of powders of alloys or intermediary compounds (e.g. intermetallics, carbides or borides) by high energy mechanical milling. The high popularity of the method is given by the fact that it usually leads to nanostructured materials and that even non-miscible elements can create solid solutions during mechanical alloying. Even though the result is known and there are many descriptions available, the mechanism of the formation of intermetallics in this process is not fully understood yet. The reasons are probably in a large variety of possible process parameters and by impossibility to measure the temperature inside the powder in the milling jar. This work proposes following concept: indirect determination of the dependence of the peak powder temperature on milling conditions (rpm, ball-to-powder ratio, ball size) by the use of thermally decomposing salts, comparison of phase composition of the mechanically alloyed powder with the reference powder mixture exposed in the furnace to the detected peak temperature and observation of the time development of the microstructure and phase composition by XRD and electron microscopy (SEM, TEM). The mechanism will be observed on several different systems containing brittle and ductile powders (e.g. Ti-Al, Ti-Si, Ti-Al-Si) and the general conclusion regarding the mechanical alloying mechanism will be formulated.

Mechanisms of Action of Bordetella Type III Secretion System Effector Protein BteA

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Study programmes: Mikrobiologie, Microbiology
Theses supervisor: RNDr. Jana Kamanová, Ph.D.

Annotation

Classical Bordetella species cause respiratory infections of mammals, such as the whooping cough disease of humans caused by Bordetella pertussis and B. parapertussis. These pathogenic bacteria employ a type III secretion system (T3SS) to inject cytotoxic BteA effector protein into cells of the mammalian hosts. It remains unknown how BteA effector protein functions and contributes to the diverging biology of classical Bordetella species. The PhD. candidate will use air-liquid interface model of respiratory epithelia and yeast cell model complemented by an array of biochemical and mass spectrometry approaches to elucidate the molecular mechanisms underlying the action of BteA effector protein and its functional divergence.

Mechanochemical indicators for optical spectroscopy

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemie, Chemistry
Theses supervisor: Ing. Martin Krupička, Ph.D.

Annotation

Mechanochemical indicators change its spectroscopic properties as a function of applied mechanical force. The goal of the thesis is to synthesize and study such indicators. Suitable molecules will be proposed, based on known chromophores and mechanophores and studied using quantum chemical methods. Selected molecules will be synthesized and studied with spectroscopic techniques with and without presence of mechanical force. Molecules allowing for measuring and quantification of mechanical force should be result of this work, together with theoretical model of its action.

Melting processes in vitrification technologies

Department: Laboratory of Inorganic Materials, Faculty of Chemical Technology

Annotation

The analysis of the processes during the vitrification process is performed using a mathematical model. Input data of the model will be obtained by a set of experimental methods including high temperature monitoring of melting processes, analysis of released gases, thermal analysis and determination of oxidative reduction equilibrium in melts.

Membrane separation of fermentation primary products

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: doc. Dr. Ing. Tomáš Moucha

Annotation

In biotechnologies, batch processes are often used, in which living cultures/biomass are used. Metabolites produced by culture are often poisonous and can damage the culture itself, as an example of which can serve ethanol fermentation. In periodic processes, the initial periods including sterilizing, nutrient dosing, etc., used to be time consuming, financially burdening. Therefore, it is desirable to dedicate an effort to develope continuous performance of such processes. One of the operations ensuring the process continualization can be membrane separation. This case brings the necessity of two membranes modules: i) microfiltration to separate solid particles-biomass and ii) pervaporation to separate primary product of fermentation, e.g., ethanol, as mentioned above. The goal of this work is to experimentally develop two step membarne separation technique, including microfiltration and pervaporation, to be prepared for an interconnection with a fermenter. THe development will be conducted from the viewpoint of chemical engineering. The reached separation parameters (selectivity, permeability) will be investigated in dependency on the process parameters (pressure, flowrate, temperature, feed composition). Chemical engineering quantities (membrain polarization module, mass transfer coefficient,...) will be used to describe these dependencies. At the workplace the new membrane modules are available, which were purchased for the purpose of this development. The PhD student will get familier both with industrial membrane module and with the custom made one. In addition to being familiar with modern technologies introduced in industry, the PhD student will also work in the team of students and academic staff who are experienced in industrial cooperation. PhD study will prepare the student to obtain either qualified working position in industry or to be able systematically conduct further research from the viewpoint of qualified chemical engineer. Further information Assoc. Prof. Tomáš Moucha, UCT Prague, building B, room T02, email: tomas.mooucha@vscht.cz

Metabolomics 2.0: Investigation of biological systems using mass spectrometry

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Ing. Tomáš Čajka, Ph.D.

Annotation

Over the last decade, mass spectrometry-based metabolomics and lipidomics have become established as the key platforms for comprehensive profiling of low-molecular-weight compounds (polar metabolites, complex lipids) in biological systems. Coupling liquid chromatography to mass spectrometry (LC-MS) is the preferred technique in metabolomics and lipidomics permitting effective compound separations and detection. However, there is still a lack of sufficient data on the metabolome and lipidome characterizing biofluids (i.e., plasma, serum, urine) and tissues which can be easily accessible and reused at any time for future studies. The aim of the PhD project is to focus on novel approaches in second generation of metabolomics workflow (Metabolomics 2.0) such as (i) merging targeted and untargeted methods, (ii) standardization metabolomics methods, and (iii) extending the breadth and scope of polar metabolites, complex lipids, and various exogenous compounds to ultimately deliver a comprehensive database of a wide range of metabolites in various biological matrices. The work will be conducted at the Institute of Physiology CAS and financially supported by various grants (GACR, MSMT, AZV).

Metabolomics as a tool illustrating the interactions between malting barley and Fusarium micromycetes after application of modern antifungal agents and methods

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology

Annotation

Effective control of Fusarium infection of barley is of high concern for malting industry due to the risk of mycotoxins production. To improve safety of the final products, malt and beer, introduction of approaches reducing molds growth during malting is highly desirable. Application of modern biofungicides or physical techniques as pulsed electric field technology is of high concern. The topic of the dissertation thesis will include the characterization of (bio)chemical changes taking place in the barley/pathogen system by metabolomics, as a complex analysis of endogenous and exogenous low molecular weight metabolites up to about 1500 Da, performed by using of modern ultra-high performance liquid chromatography coupled with high resolution mass spectrometry. Additionally, influence of Fusarium reducing technologies on quality parameters of malting/brewing intermediates will be evaluated in order to assess their potential to be used in routine practice.

Metal nanoparticles tunable nanostructuring in glasses nad glass ceramics: solid state chemistry, optical properties and nanostructure

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

Annotation

In this work we are going to focus on the tunable nanostructuring of the metal nanoparticles – especially Cu, Ag and Au – in various matrices of glass or glass ceramics. Together with university Orléans new technological approaches for NPs in glass or glass-ceramics fabrication will be applied. The mechanism, how presence of the nanoparticles with various size, shape, distribution or valence influences the resulting optical (especially absorption and luminescence) properties, will be systematically studied

Metallic materials prepared by advanced 3D printing technologies

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: prof. Dr. Ing. Dalibor Vojtěch

Annotation

3D printing methods like selective laser melting (SLM) or other are prospective for the fabrication of complex structural parts and medical implants because of their ability to produce very complex shapes. In the work, structures, mechanical, corrosion and biological properties of Ti based alloys, stainless or high-strength steels, biodegradable alloys or light-weight alloys prepared by various 3D printing processes will be investigated. In addition, the relationships between process parameters of 3D printing and characteristics of resulting products will be evaluated. Results of the study will propose process parameters the most suitable for obtaining desirable products.

Methods for Li recovery from lithium minerals

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: Ing. Nguyen Hong Vu, Ph.D.

Annotation

The thesis is focusing on lithium recovery from lepidolite, a lithium mica. Sintering, leaching and integrated methods will be tested in order to transform lithium into solutions, from which lthium compounds with battery grade will be prepared.

Methods of effective assurance of health safety, technological harmlessness and the quality of non-alcoholic beverages

Department: Department of Food Preservation, Faculty of Food and Biochemical Technology

Annotation

In the food industry, acetic acid bacteria belonging to the Acetobacteraceae family are both health and technologically undesirable bacteria that often contaminate non-alcoholic flavoured and unflavoured beverages on different bases. For contaminated drinks, the decrease in quality is due to the occurrence of serious sensory defects. As regards to human resources, the species Acetobacter cibinongensis, Asaia borogensis, Asaia lannensis, Gluconobacter frauterii have the status of opportunistic pathogens causing serious nosocomial infections in immunocompromised persons. The doctoral thesis is focused on the detection, characterization and identification of acetic acid bacteria isolated from non-alcoholic beverages and the production environment using classical and modern microbiological methods. The aim of the work is to contribute to refinement of laboratory control of non-alcoholic beverages during elimination of undesirable bacteria affecting its health safety, quality and durability.

Micro and nanorobots based on photocatalytic materials for biomedical applications

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: doc. RNDr. Martin Pumera, Ph.D.

Annotation

Candidate will construct microrobots powered by chemicals for drug delivery and cancer treatment using inorganic chemistry approach. Candidate will learn how to fabricate micro and nanorobots by electrochemical and physical vapor deposition approach, how to operate and remotely control micro and nanorobots and how to chemically program them. More on www.nanorobots.cz

Micro and nanorobots for decontamination of pollutants in the environment

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: doc. RNDr. Martin Pumera, Ph.D.

Micro and nanorobots for targeted drugs delivery to cancer cells

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: doc. RNDr. Martin Pumera, Ph.D.

Annotation

Candidate will construct microrobots powered by chemicals for drug delivery and cancer treatment using inorganic chemistry approach based on photoactive systems. Candidate will learn how to fabricate micro and nanorobots by electrochemical and physical vapor deposition approach, how to operate and remotely control micro and nanorobots and how to chemically program them. More onwww.nanorobots.cz

Microbial community patterns under soil land use changes.

Department: Department of Informatics and Chemistry, Faculty of Chemical Technology
Study programmes: Bioinformatics, Bioinformatika

Annotation

Soil is considered the most microbial diverse environment on Earth. Understanding the traits that control the biological entities in such rich environment is of interest to all fields of life sciences, from ecology and environmental microbiology to agriculture, biotechnology and health. Effects of human activities such as land use changes had led to temperature increase, nitrogen contamination, with a direct impact on microbial biomass and their functional profiles. The current methods for studying microbial communities produce data that allows us to identify latent variables which can control the changes in microbial communities, considering the power of sequencing the whole community and disentangling sample relationship from the environmental data. The limitation nowadays resides in gathering, processing and analyzing the sample data in a standardized way, on top of the specialist interpretation of the results. The proposed solution to such a problem would be to build a community fed database that could be used together with a pipeline for identifying those latent variables, which would be the species response to environmental changes.

Microbiome and metabolome based study of obesity, diabetes, and neurodegeneration and the therapeutic potential of prolactin-releasing peptide analogs by metabolomics

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie

Annotation

It was well established that the gut microbiome contributes substantially to human health/disease status. Unfortunately, there is limited information about the underlying molecular mechanisms of gut microbiome-host crosstalk. Recent studies have suggested that gut microbiota play a fundamental role in diseases such as obesity, diabetes, cardiovascular and neurodegenerative diseases like Alzheimer’s disease. They are the world's leading causes of morbidity and mortality and are responsible for 60% of all deaths. It appears that obesity, type 2 diabetes (T2DM), and neurodegeneration have a common etiopathogenesis involving subclinical inflammation and insulin resistance. The lumen of the gut is the biggest body surface facing the outer environment, and the mucosal immune system must be tightly regulated. The gut microbiota plays an important role in educating and modulating the host immune. Therefore, disturbance of the microbial ecosystem, called dysbiosis, substantially contributes to the establishment of the inflammatory state. We will use animal models of Alzheimer’s disease, where the modulation of the host immune system plays a crucial role. We assume that one of the mechanisms of how the gut microbiome associated with these conditions communicates with the immune system of the host is mediated by small molecular metabolites. The metabolites, which are usually identified as present in the gut and associated with pathologies, may be derived from the diet and/or are products of microbial metabolism. In the project, we will focus on interplay between disease development, microbiome and changes in metabolism to explore the development of the disease and efficacy of new lipidized analogs of the anorexigenic prolactin-releasing peptide as a complex therapy that simultaneously affects obesity, T2DM, and neurodegeneration in mouse and rat models.

Microfluidic systems for the synthesis and separation of optically active chemicals

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Annotation

Microfluidic reactors and separators are modern devices that represent an alternative to conventional batch and flow systems used in biotechnology. The small spatial scale ensures reproducible reaction conditions and intensive mass and heat transfer. Microfluidic devices generally lack moving parts and allow easy combination of many unit operations such as mixers, separators, reactors. The main objectives of the PhD project are: Study of kinetics of selected enzymatic reactions, which lead to production of optically active chemicals that are used in pharmacy, food industry or synthesis of chemical specialties. Design and fabrication of microfluidic separators with embedded membrane or sorbents with attached chiral selectors for separation of racemic mixtures. Testing of manufactured microfluidic devices for selective separation of selected optically active compounds. Evaluation of the possibility of accelerated transport of optically active substances through membranes by means of an imposed electric field. The lab is equipped with technologies for the production of microfluidic systems, modern measuring instruments and powerful computers. The participation of the doctoral student in grant projects and active participation in international scientific conferences is expected.

Microscopic description of interfacial phenomena

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

Annotation

The work is of a computational nature and its purpose is to study interfacial phenomena from the microscopic perspective, i.e. from the knowledge of inter-molecular interactions in the given system. The main task is to study conditions under which a thick liquid film nucleates at a surface of a solid substrate and how its width grows (and eventually diverges) depending on external parameters. In particular, one of the crucial targets to be addressed is the dependence of the film growth on the surface geometry and details of the microscopic interactions. These predictions are not only of high fundamental interest but are also relevant in modern technologies, such as micro- and nanofluidics.

Microstructural changes in reinforced concrete subjected to electromigration healing

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Milan Kouřil, Ph.D.

Annotation

The work aims to disclose small scale microstructural changes in concrete subjected to electromigration procedures. Experiments will simulate non-destructive methods based on direct electric current that are used to heal reinforced concrete structures. Electrochemical extraction of chlorides, emerging field of injection of corrosion inhibitors or healing of the damaged concrete by injection of nanoparticles are examples of such treatments. Explaining fundamental mechanisms on the microstructural level caused by the application of direct current and relating them to traditional continuum model parameters will be performed in relation with the presence of supplementary materials in concrete.

Microwave photochemistry and preparation of polyaromatics

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Dr. Ing. Vladimír Církva

Annotation

The project is coupling of two scientific branches: traditional photochemistry and neoteric microwave chemistry, when the effect of UV/Vis and microwave radiation on the chemical and physical properties of molecules is studied. UV radiation is generated quite extraordinary directly by microwave field using the electrodeless discharge lamps. The aim of the project is a basic research of effect of microwave radiation on the course of cis-trans photoisomerization and photocyclization of stilbenes and o-terphenyls leading to phenanthrene, triphenylene, phenacene, and helicene derivatives, or to their N- and S-hetero analogues, which can be applied in molecular electronics. The candidates should have a M.Sc. or equivalent degree (or thesis submitted) in organic chemistry or organic technology (or related field), a penchant for experimental work in organic synthesis.

Mikrofluidní systémy pro syntézu a separaci opticky aktivních látek

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Annotation

Microfluidic reactors and separators are modern devices that represent an alternative to conventional batch and flow systems used in biotechnology. The small spatial scale ensures reproducible reaction conditions and intensive mass and heat transfer. Microfluidic devices generally lack moving parts and allow easy combination of many unit operations such as mixers, separators, reactors. The main objectives of the PhD project are: Study of kinetics of selected enzymatic reactions, which lead to production of optically active chemicals that are used in pharmacy, food industry or synthesis of chemical specialties. Design and fabrication of microfluidic separators with embedded membrane or sorbents with attached chiral selectors for separation of racemic mixtures. Testing of manufactured microfluidic devices for selective separation of selected optically active compounds. Evaluation of the possibility of accelerated transport of optically active substances through membranes by means of an imposed electric field. The lab is equipped with technologies for the production of microfluidic systems, modern measuring instruments and powerful computers. The participation of the doctoral student in grant projects and active participation in international scientific conferences is expected.

Misfit cobaltites for high-temperature thermoelectric conversion – the role of phase composition and oxygen stoichiometry

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

Annotation

The aim of this work is the synthesis and characterization of cobalt mixed oxides, thermodynamic data measurement and assessments in the Bi-Ca-Co-O, Ca-Co-O and Bi-Sr-Co-O systems. Measurement of thermoelectric properties of the Bi1.8(Ca/Sr)2Co1.85Oz misfit phase including their dependence on variable oxygen stoichiometry as a function of temperature and oxygen activity will be also studied.

Mixed matrix mambranes for gas separation

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Dr. Ing. Vlastimil Fíla

Annotation

Gas membrane separation represents the perspective and energy-saving alternative with respect to the present separation processes (PSA, TSA, amine extraction, etc.). Most of the membranes industrially applied is based on the polymeric materials having low permeability and/or selectivity. In the frame of this work the mixed matrix membranes combining the perspective properties of both, microporous and polymeric membranes, will be prepared and characterized. The microporous material e.g. ZIF-8, silicalite-1, ETS, FAU, TS-1, AFX, MOF or their post-synthesis modified variants will be used as filler, and combined with polymeric matrix based on industrially available polymers or the ones synthesized in the laboratory. The aim of this study is the preparation and characterization of membranes for different industrial applications. The target application will be defined upon agreement based on the actual research carried out in laboratories (e.g. processing of exhaust gases from power plants and other industrial processes, separation of CO2 from biogas, separation of H2 from streams containing CO2 and/or hydrocarbons, separation of hydrocarbons, etc.). In the frame of this work, the problematics of polymer-filler interactions and the development of new materials aiming to increase thermal and chemical stability, selectivity and permeability of prepared membranes will be studied.

Modeling of carbohydrate-lectin interactions

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Dr. Ing. Ivan Raich

Annotation

Lectins, as a group of proteins, are responsible for the specific recognition of carbohydrates, either free of bound in glycoproteins or glycolipids. Most frequently, these processes take place at the cell surfaces and are a part of the cell recognition which plays an important role in bacterial infections, inflammatory and other processes. Using molecular modeling and computational chemistry the work will deal with the study of these interactions at the molecular level, their strength and specificity and, at the same time, will search for carbohydrate substrates for lectins with a potential therapeutic use.

Modeling of drug release from the solid dispersions by diffusion erosion models

Department: Department of Organic Technology, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials

Annotation

This work is aimed at the study of the drug release from the solid dosage forms comprsing solid dispersions. Such formulations exhibit a well-defined structure, and the drug dissolution can be studied not only by classical dissolution techniques, but also by the apparent intrinsic dissolution. Several fronts develop in dosage forms of this type, where thos fronts corresponds to the liquid penetration, drug leaching and erosion of the residual matrix. Such processes can be described by diffusion-erosion models, which allow determining their rate controlling steps and characteristic rates to be used for the design of controlled release drugs.

Modeling of fluid permeability through porous ceramics and rocks

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

Annotation

Fluid permeability is of major interest not only in ceramic science and technology, but also in many fields of geoscience. This PhD topic focuses on computer modeling of fluid permeability through porous ceramics and rocks, including powder beds and unsolidified sediments, with the aim to predict fluid permeability on the basis of theoretical estimates, analytical models and mainly numerical calculations on digital model microstructures and spatial images imported from X-ray micro-computed tomography. The modeling will range from simple pore channels to cavity-throat microstructures, partially sintered microstructures to hierarchical and fractal microstructures with cracks. The student should have a background in materials science or geosciences and should be interested in computer-based modeling work.

Modeling of fluid permeability through porous ceramics and rocks

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

Annotation

Fluid permeability is of major interest not only in ceramic science and technology, but also in many fields of geoscience. This PhD topic focuses on computer modeling of fluid permeability through porous ceramics and rocks, including powder beds and unsolidified sediments, with the aim to predict fluid permeability on the basis of theoretical estimates, analytical models and mainly numerical calculations on digital model microstructures and spatial images imported from X-ray micro-computed tomography. The modeling will range from simple pore channels to cavity-throat microstructures, partially sintered microstructures to hierarchical and fractal microstructures with cracks. The student should have a background in materials science or geosciences and should be interested in computer-based modeling work.

Modeling of thermal degradation of wood materials in fire

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: doc. Dr. Ing. Milan Jahoda

Modeling of ultrafast processes in radiation chemistry

Department: Department of Physical Chemistry, Faculty of Chemical Engineering

Annotation

The enormous experimental development allows for a direct study of electron photoemission from water and solutions. New, hithertho unknown phenomena have emerged. The Intermolecular Coulomb Decay represents one example. The new phenomena can give rise to novel spectroscopies or to application in radiooncology. The proposed Thesis will focus on the exploration of these phenomena, using the methods of quantum theory of molecules and molecular simulations. For more information, see http://photox.vscht.cz/

Modelling elastic properties of nucleic acids structures

Department: Department of Informatics and Chemistry, Faculty of Chemical Technology
Study programme: Bioinformatika
Theses supervisor: doc.Ing. Filip Lankaš, Ph.D.

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Elastic properties of molecules determine free energz changes upon their mechanical deformation. Elasticity (or deformability) of nucleic acids plays a key role in their recognition by proteins, affects spatial organization of the genome or, in the case of RNA, is of utmost importance in the functioning of the ribosome and other macromolecular complexes. The aim of the work is to develop models describing the elasticity of DNA and RNA structures and to parameterize the models from extensive molecular dynamics simulations. Systems important in biology and for nanotechnological applications will be chosen, such as DNA duplexes of various sequences, DNA containing a radiational damage, or various RNA structural motifs. The work will contribute to our understanding of DNA and RNA mechanical properties and their role in the context of biology, biophysics and nanotechnology.

Modelling of gas flow in apparatus of chemical technology

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: prof. Ing. Dalimil Šnita, CSc.

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Computational fluid dynamics (CFD) is a branch of fluid mechanics that uses numerical analysis and data structures to analyze and solve problems that involve fluid flows. Computers are used to perform the calculations required to simulate the flow of the fluid, and the interaction of the fluid with surfaces defined by boundary conditions. Initial validation of such software is typically performed using experimental apparatus or pilot and industrial data. The work will be focused on the comparison between more and less approximated mathematical models in the form of case studies. Work will be concerned with several chosen devices, e.g. laminar boxes or electric furnaces with forced or natural convection. The results of modelling will be validated with the available experimental data.

Modelling of new spaces for glass melting

Department: Laboratory of Inorganic Materials, Faculty of Chemical Technology
Theses supervisor: Ing. Marcela Jebavá, Ph.D.

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Proposals of advanced melting technologies and relevant glass melting spaces will be examined using by mathematical modelling. The aim is to optimized conditions leading to the decrease of energy consumption and to the substantial increase of the pull rate of glass furnaces. Potentially, miniaturized compact melting spaces offer an advantage of lower need of refractory materials. Present politics of reducing of fossil fuel combustion pressures producers to larger use of electric energy coming from classic or alternative sources. An impact of electric boosting, connected with controlled energy distribution in space, on character of the melt flow will be investigated. Experimental kinetic data of homogenization processes (bubble removal, sand particle dissolution) will be implemented in mathematical model where are used as criteria of quality. Noticeably more efficient character of the melt flow will be studied, and subsequently, controlling processes of the melting will be optimized.

Modelling of nuclear quantum effects in spectroscopy

Department: Department of Physical Chemistry, Faculty of Chemical Engineering

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The Thesis will focus on method development for simulations of spectral properties with a special attention paid to the nuclear quantum effects. The role of nuclear quantum effects on molecular structure and thermodynamics will be explored, too. For more information, see http://photox.vscht.cz.

Modelling of solvated electrons properties in polar solvents

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

Modification of metal surfaces by helicenes for molecular sensing

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Jan Storch, Ph.D.

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The aim of this Ph.D. thesis will be the synthesis, characterization and chiral resolution of appropriate helicene derivatives for use in hybrid plasmonic nanostructures with a strong chiral response. Such systems serve in detection of small chiral molecules for direct determination of their absolute configuration or ee% in enantiomerically enriched mixtures.

Modification of polymers by metal nanostructures

Department: Department of Solid State Engineering, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Jakub Siegel, Ph.D.

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The work consists in the preparation of composite materials based on polymers and metal nanostructures for use in biological applications, exploiting their antibacterial effect. Polymeric carriers will be deposited by metal layers which will be nanostructured by the action of a power excimer laser. Alternatively, the possibility of replicating metallic nanostructures from inorganic carriers (silica, silicon) into biocompatible polymers will be studied.

Modified nucleoside triphosphates with unnatural nucleobases for enzymatic synthesis of modified DNA

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Michal Hocek, DSc.

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The project will deal with the study and development of the chemical synthesis of diverse modified nucleoside triphosphates derived from d5SICS and dMMO2 nucleosides, which are used in the extension of the genetic alphabet. New derivatives bearing useful functional groups will be designed and synthesized aiming at the modification of DNA in the major groove. Substrate activity of these dNTPs with diverse DNA polymerases will be studied and they will be used for site-specific modification of DNA or in enzymatic synthesis of hypermodified DNA. References: Seo, Y. J.; Malyshev, D. A.; Lavergne, T.; Ordoukhanian, P.; Romesberg, F. E. Site-specific Labeling of DNA and RNA Using an Efficiently Replicated and Transcribed Class of Unnatural Base Pairs. J. Am. Chem. Soc. 2011, 133, 19878–19888.

Modular Hydrogel Microrobots

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: RNDr. Ivan Řehoř, Ph.D.

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Miniturization of robots to the sizes of tens of microns will allow their application in new, currently inacccesible areas, such as controlled drug delivery or microsurgery. In order to simplify the mechatronic design of such microrobots, novel approaches have been adopted for their operation and control, exploiting soft materials, actuating through deformation, such as responsive polymers. These advanced materials, together with development of their processing in microscales gave rise to soft microrobots capable of independent untethered motion or manipulation with other objects . In our group, we have recently developed hydrogel microrobots, crawling over surfaces, powered by light (https://www.youtube.com/watch?v=PQOXS7f9rDg). Many of the visionary real-life applications of microrobots foresee their ability to autonomously cooperate and connect into greater structures, that will perform tasks, inaccessible to the individual robots. Modular connectivity of macroscopic locomotive robots has been tackled experimentaly, demonstrating the extended application of such robot assemblies, compared to the individual robots. The connective mechanisms and the organization of the individual robots into the assembly however remains a complex and challenging task. This project aims to probe potential pathways for the connection of crawling hydrogel microrobots into actuating millimeter-sized structures, capable of performing mechanical work.

Modulation of retroviral particle stability: a promising target for HIV-1 inhibition

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie
Theses supervisor: doc. Dr. Ing. Michaela Rumlová

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The structure of immature and mature HIV-1 particles are formed by the hexameric network of the same capsid protein (CA), but the intra- and inter-hexameric contacts are different for both types of particles. Any change in the stability of both types of these protein networks suppresses the replication ability of the virus and thus the infectivity of the virus. The critical role of CA in these steps of the HIV-1 replication cycle makes it a highly attractive pharmacological target. In this work, we will study the effect of a number of different small molecules that by binding to CA substantially modulate the stability of both types of CA hexameric networks and thereby disrupt HIV-1 replication. In addition to specific synthetic molecules recently identified either in our laboratory or described in the literature, we will also study the role of small cellular cofactors whose mechanism of modulating the stability of the CA hexameric network in various retroviral species is unknown. Understanding the principle of positive and negative modulation of CA stability of hexameric networks of HIV-1 mature or immature particles may open a new therapeutic target for HIV-1 inhibition.

Molecular Machines in Supramolecular Systems

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Jiří Kaleta, Ph.D.

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Molekulární stroje, zvláště pak jejich 2-D a 3-D sestavy, jsou unikátní systémy s obrovským potenciálem např. v nanoelektronice. Rádi bychom prozkoumali nový přístup vedoucí k pravidelným 2-D polím molekulárních strojů, který je založen na tvorbě host-guest inkluzních komplexů mezi cucurbit[n]urily (CBs) a vhodně navrženými hostitelskými molekulami. Tyto tyčinkovité struktury pak budou na jednom konci obsahovat vlastní funkční jednotku, zatímco druhá strana ponese kotvící skupinu schopnou komplexace s CBs. Rozložení takovýchto supramolekulárních komplexů na rovných površích by pak mělo být diktováno interakcí samotného CB s daným substrátem. Cíle projektu zahrnují návrh nové skupiny ideálně světlem aktivovaných molekulárních strojů na bázi vypínačů a motorů, tvorbu příslušných supramolekulárních komplexů a jejich následné studium jak v roztoku, tak na různých površích. Není tedy překvapením, že tento projekt v sobě kombinuje několik oborů chemie, od organické, supramolekulární, analytické, až po fyzikální a materiálovou.

Molecular Simulations of Atmospheric Aerosols

Department: Department of Physical Chemistry, Faculty of Chemical Engineering

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Atmosphere of Earth is a unique chemical reactor. Light induced reactions play a prominent role in the intiation of many important chemical reactions. Many of the atmospheric processes also take place within heterogeneous processes, e.g. on the surface of aerosols or dust particles. The project focuses on theoretical modeling of chemical and photochemical processes in the stratosphere and in the troposhere. The whole toolbox of theoretical methods will be used within the project. For more information, see http://photox.vscht.cz/

Molecular composites of polyamides

Department: Department of Polymers, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: prof. Ing. Jiří Brožek, CSc.

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The work is focused on preparation posibilities of molecular composites polyamide 6/other polyamides and their characterization. Polyamide acts as a matrice in these materials and other polyamide is scattered in the matrice and can change properties of materials. These composites offer variability in materials properties and fullfil demands on special polymers.

Molecular modeling of PETase – a unique plastic-degrading enzyme

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

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PETase is an interesting enzyme with a unique plastic-degrading ability. It was discovered in 2016, but since then more than ten crystal structures have been published and its potential applications under different reaction conditions are extensively studied. PETase mainly degrades polyethylene terephthalate (PET), the efficiency of such process depends on the solvent which surrounds the enzyme and the plastic particles. In addition, it is possible to enhance the PETase activity by mutations. It has been also shown, that thanks to mutations, it can gain ability to degrade other plastics. By means of classical molecular dynamics simulations we will study the structure and flexibility of PETase and its selected mutants under different reaction conditions. The QM/MM methods will be used to describe the reaction mechanism in details. The project will be realized in collaboration with Center for Nanobiology and Structural Biology in Nové Hrady. The results of the study will provide deeper understanding of the PETase function and they could lead to the design of better reaction conditions or mutants with higher catalytic efficiency.

Molecular modeling of proteins in crowded environment

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

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Cellular environment contains large amounts of macromolecules, none of them is present in high concentration, but overall, we call the environment crowded, because macromolecules occupy about 40 % of the volume of the cells. Proteins are frequently studied only in aqueous solutions with presence of other macromolecules both in vitro and in in silico. However, including these crowding agents is required for realistic description, because they influence the overall stability of proteins, preference of more compact conformations, association constants and rates of diffusion. By means of classical molecular dynamics simulations we will study citrate synthase, which possesses open and closed conformation, in aqueous solutions of dextrane, polyethyleneglycole and other crowding agents. The project will be realized in collaboration with Center for Nanobiology and Structural Biology in Nové Hrady. The results of the study will provide deeper understanding of the effects of crowding agents on the structure and stability of this enzyme.

Molecular simulations of electrode-electrolyte interface

Department: Department of Physical Chemistry, Faculty of Chemical Engineering

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The thesis will focus on theoretical study of the interfaces between the electrode material and electrolytes. Extremely concentrated electrolytes will be studied as well, especially in the context of novel energy sources. The work will include techniques of quantum chemistry and statistical mechanics. For more information, see http://photox.vscht.cz/

Multicomponent silicate and borate structures to be used in thermal neutrons detection

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: Ing. Vít Jakeš, Ph.D.

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This work will be focused on multi-component silicate and borate structures with substitution of activator ions in order to increase the phase and chemical resistivity of the material and to improve the scintillation response in the detection of neutron radiation.

Multifunctional hybrid metal-organic frameworks for Li-ion batteries and fuel-cell applications: synthesis, structure and ionic dynamics.

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Jiří Brus, Ph.D.

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The development of hybrid and full electric vehicles raises the demand for electrical energy generation and storage devices. Metal-organic frameworks (MOFs) with its well-defined porous architecture that allow Li-ions to be reversibly inserted/extracted, predetermines MOFs to be explored as electrode as well as electrolyte materials for Li-batteries (LiBs). Many drawbacks however, still have to be overcome. The purpose of the proposed project is improvement of hybrid MOF materials. A possible way how to modify MOF toward the better performance in LiBs applications is utilization of metallacarborane compounds. Given their inherent robustness, electron-delocalized skeletal bonding, amphiphilic behavior and ability to accommodate metal atoms in the cage framework, metallacarboranes are perfect candidates. The project is thus focused on the synthesis of hybrid MOF systems modified by various Li salts (optionally combined with selected polymers) and subsequent optimization of their composition with respect to mechanical and physicochemical properties. Simultaneously the most promising candidates will be subjected to a range of physicochemical characterization techniques amongst them solid-state NMR spectroscopy will be particularly useful for probing structure and ionic dynamics.

Multivalent glycoconjugates for the therapy of galectin-related pathologies

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology

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Galectins are animal lectins with affinity to b-d-galactosides, which in vivo participate in, e.g., cancerogenesis [1], cardiopathologies [2], they are connected with the modulation of immune response and the course of allergic reaction [3]. The concentration of extracellular galectins in vivo may be used as diagnostic markers in pathologies, such as colorectal carcinoma. A targeted inhibition of extracellular galectins is a prospective therapeutic approach to the treatment of pathologies associated with galectin overproduction. A range of recent structure-function studies is devoted to defining structural requirements for high-affinity and selective carbohydrate ligands of individual galectins [4]. The avidity of specific carbohydrate inhibitors to selected galectins may be greatly increased by multivalent presentation [5]. The aim of this work is to synthesize multivalent glycoconjugates carrying modified carbohydrates with a high selectivity and affinity to target galectins. The inhibition and binding potential of these glycoconjugates to galectins will be assayed by in vitro methods of ELISA and surface plasmon resonance (SPR) with recombinant galectins [6] and, later on, with selected cultures of cancer cells. [1] F. T. Liu, G. A. Rabinovich: Galectins as modulators of tumour progression. Nat. Rev. Cancer. 2005, 5, 29-41. [2] N. Suthahar, W. C. Meijers, H. H.W. Silljé, J. E. Ho, F.-T. Liu, R. A. de Boer: Galectin-3 Activation and Inhibition in Heart Failure and Cardiovascular Disease: An Update. Theranostics 2018, 8, 593-609. [3] X. Chen, C.‐H. Song, Z.‐Q. Liu, B.‐S. Feng, P.‐Y. Zheng, P. Li, S. H. In, S.‐G. Tang, P.‐C. Yang: Intestinal epithelial cells express galectin‐9 in patients with food allergy that plays a critical role in sustaining allergic status in mouse intestine. Allergy 2011, 66, 1038–1046. [4] D. Laaf, P. Bojarová, L. Elling, V. Křen: Galectin-carbohydrate interactions in biomedicine and biotechnology. Trends Biotechnol.2019, 37, 402-415. [5] P. Bojarová, V. Křen: Sugared biomaterial binding lectins: achievements and perspectives. Biomat. Sci. 2016, 4, 1142-1160. [6] L. Bumba, D. Laaf, V. Spiwok, L. Elling, V. Křen, P. Bojarová: Poly-N-acetyllactosamine neo-glycoproteins as nanomolar ligands of human galectin-3: binding kinetics and modeling. Int. J. Mol. Sci. 2018, 19, 372.

NMR crystallography of active pharmaceutical ingredients

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Jiří Brus, Ph.D.

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In the NMR Department of the IMC there is an urgent need for lowering the computational cost and at the same time increasing the robustness of the crystal structure prediction-based NMR crystallography approach to structural elucidation of powders and other forms of molecular solids. The project aims at analyses of the crystal-symmetry elements together with other geometry parameters in order to find and implement structural constraints and/or restraints into our NMR crystallography protocol. In addition, extensive database searches of the investigated structural motifs will be used.

Nanoobjects as additives to ionic liquids

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: Ing. Vilém Bartůněk, Ph.D.

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Ionic fluids are characterized by many useful properties, which include very low vapor pressure. Therefore, the possibility of their alication is relatively high, from heat transfer to use as ecologically acceptable solvents. Their properties can be improved in various ways and one of the approaches can be the addition of the most diverse nanoobjects, especially based on metal oxides. The study of this approach is the content of this dissertation.

Nanoparticles for elimination of viruses spreading through air, water and bodily fluids

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Study programmes: Mikrobiologie, Microbiology
Theses supervisor: Mgr. Jan Weber, CSc.

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Proposed PhD project addresses the problem of the threat of viruses in the environment to the public. It is based on preliminary results in which specially designed nanoparticles have inhibited and eliminated viruses such as herpes simplex type 1 and 2, human papilloma virus, respiratory syncytial virus and dengue virus. These viruses exploit for the initial attachment and entry heparan sulfate proteoglycan that is naturally expressed on the cell surface. Here, we will test silver and gold nanoparticles that are capped with mercaptoundecane sulfonate groups, which mimics heparan sulfate. Nanoparticles will be prepared as solid substance as well as applied on various materials using sonochemical coating technique. In our group, we will examine their antiviral and virucidal effect on airborne infections (e.g. coxsackie virus, adenovirus, reovirus), water-borne infections (e.g. norovirus, rotavirus) and blood- and body fluid-borne infections (e.g. HIV, hepatitis B virus, zika virus). During postgradual study, student will learn how to work with cell cultures in biosafety level 3 settings among others how to determine replication and inhibition of various viruses, fluorescence immunochemistry techniques, qRT-PCR. References: 1. Cagno V, et al. Broad-spectrum non-toxic antiviral nanoparticles with a virucidal inhibition mechanism. 2018 Nat Mater. 17(2):195-203. doi: 10.1038/nmat5053. Epub 2017 Dec 18

Nanostructured ferrited doped with magnetic elements to enhance their magnetocaloric effect

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: Ing. Ladislav Nádherný, Ph.D.

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Magnetic refrigeration is a modern and ecologic cooling technology based on the magnetocaloric effect (MCE). This technique can be used to attain extremely low temperatures, as well as the ranges used in common refrigerators. The main aim of this thesis is to enhance the magnetocaloric effect in FeCo ferrites by nanosizing and doping with magnetic ions, which both can affect magnetic phase transition near room temperature. Studied materials will be prepared by wet-chemistry methods (e.g. sol-gel, co-precipitation) and MCE will be characterized in PPMS in which the heat capacity will be measured in a strong magnetic field.

Nanostructured semiconductors for chemical sensors

Department: Department of Physics and Measurement, Faculty of Chemical Engineering
Theses supervisor: Ing. Jan Vlček, Ph.D.

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Nanostructuring is a prospective approach in the research and design of active parts for chemical sensors during the last years. Nano-morphology offers enhanced properties of the resulting sensors, particularly selectivity and sensitivity, in contrast with unstructured materials. The aim of this work is a systematic research of relations between morphology of semiconducting materials and their detection abilities in chemical gas sensors. Nanostructured semiconductors will be synthetized mainly by CVD methods (Chemical Vapour Deposition). Electrotransport properties, chemical composition and other parameters will be also studied besides the morphology

Nanostructures based on layered carbides – Mxeny

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

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This thesis is focused on the preparation of layered MAX phases with general composition M1+yAXy, where M is transition metal, A is metal or semi-metal from the group of p-elements (Al, Si, Ge) and X is carbon or nitrogen. MAX phases have a unique layered structure which can be chemically exfoliated to monolayers of MXens with general composition M1+yXy. Their surface can be stabilized by various functional groups. Student will work on the development of new methods for synthesis of MAX phases (SPS methods, high-temperature ceramic synthesis) and the processes of chemical exfoliation and surface functionalization. The prepared materials will be tested for applications in energetic (hydrogen evolution, Li and Na batteries, and membranes for hydrogen separation or supercapacitors). The influence of composition and structure on their properties will be studied as well.

Nanotherapeutics based on antimicrobial peptides for multiresistance bacteria species treatment

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie

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The work will be focused on the study of biodegradable polymeric nanomaterials carrying antimicrobial peptides. The studied nanomaterials will have a linear, branched or star-like structure composed from hydrophilic or amphiphilic copolymers containing stimuli-sensitive linkers. The aim of this work will be to develop an effective nanotherapeutic for the treatment of infections caused by resistant bacteria. The biological activity of these polymeric nanomaterials will be studied in dependence on the detailed structure of the whole system. The student will extend his/her knowledge in the area of ??preparation of mentioned nanomaterials, in vitro biochemical and biological testing and in vivo biological characterization of nanomaterials. The applicant's knowledge and experience in organic and / or macromolecular chemistry is an advantage, along with the desire to learn new things in other fields, such as biochemistry. The work assumes close cooperation with cooperating biological teams in the Czech Republic and abroad.

Natural and syntethic zeolites used in fish-farming recircular systems

Department: Department of Solid State Chemistry, Faculty of Chemical Technology
Theses supervisor: Ing. David Koloušek, CSc.

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Intensive fish-farming belongs to promisingly developing fields not only in the Czech Republic but also in the whole Europian Union. The quality of batch water represents the most important parameter of production effectivity in recirculation systems. The use of both modified natural and synthetic zeolites in the removal of nitrogen and other toxic compounds can lead to a higher efficiency of the fish-farming in a lower water volumes.

New "natural alloys" produced from polymetallic ores

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Pavel Novák, Ph.D.

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Deep sea nodules, i.e. the polymetallic ores located on the sea bottom, contain a large series of metals, especially Mn, Fe, Ni, Cu and Co. The ecological and economical aspects still blocks their use, but their processing routes are already being developed for possible future mining. The considered routes deal with the extraction of individual metals from the ore. But what if the natural ratios between the metals make sense and can bring interesting and applicable properties? This idea motivates a completely new approach of this work to the processing of these ores – the reduction of the ore by aluminothermic method as it is (i.e. without extraction of individual metals). Results will be new materials, which will vary based on the applied reduction agent (e.g. aluminium or silicon) and the ratio between the reduced batch and the reduction agent. According tho the preliinary tests, the alloys could contain solid solutions, various intermetallics or even the quasicrystalline phases. In this work, the preparation of the alloys by metallothermic reduction, melting and casting of the resulting alloys will be carried out, as well as their chracterization. The alloys will be chracterized from the viewpoint of the microstructure, phase composition, mechanical, tribological, corrosion and selected physical properties.

New RNA modifications for regulation of translation

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Michal Hocek, DSc.

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New types of modified mRNA bearing diverse substituents at nucleobases will be prepared by polymerase incorporation of modified nucleoside triphosphates and the influence of these non-natural substituents on interactions with proteins as well as on translation will be studied. References: 1. Milisavljevič, N.; Perlíková, P.; Pohl, R.; Hocek, M.: "Enzymatic synthesis of base-modified RNA by T7 RNA polymerase. A systematic study and comparison of 5-substituted pyrimidine and 7-substituted 7-deazapurine nucleoside triphosphates as substrates" Org. Biomol. Chem. 2018, 16, 5800-5807.

New effective separation membranes for water and wastewater treatment based on hybrid carbon-based materials

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Theses supervisor: doc. Ing. Karel Friess, Ph.D.

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Current membrane separation processes allow efficient purification and physical disinfection of water from undesirable components on the basis of a size-sieving mechanism without the need for chemical agents. The pore sizes and their distribution on the membrane surface is an important factor for the effective removal of contaminants and microorganisms. The thesis will study the possibilities of using newly prepared membrane materials based on carbon materials (carbon nanotubes, graphene derivatives, etc.) with targeted surface modifications (eg doping with antimicrobial agents, etc.) in order to effectively remove collected contaminants from water. In addition to the preparation, characterization and testing of materials, the work will also include modelling of the separation process. The result of this work will be, besides the preparation of an effective separation material and describing the model, an extension of knowledge in the given membrane field.

New nanostructured composite membranes for selective gas separation

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Study programmes: Chemie, Chemistry
Theses supervisor: doc. Ing. Karel Friess, Ph.D.

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Membrane separation processes (MSP) belong to the modern technologically significant separation methods. Furthermore, MSP are less economical demanding and more eco-friendly industrial processes compared to the conventional separation techniques used in chemical, petrochemical, pharmaceutical and food industries. The most significant industrial applications of MSP for gas separation are focused on the separation of helium from natural gas, separation of hydrogen from hydrocarbons, carbon monoxide or nitrogen and also for removing carbon dioxide from biogas or organic vapours from the air. Generally, single-wall carbon nanotubes (SWCNT) and graphene oxide (GO) based membrane materials belong to the modern and dynamically growing group of materials that have many interesting properties. Especially, this work will be targeted on SWCNT-GO-based separation of hydrogen from carbon dioxide or from other gases. Our laboratory is focused on the topic of membrane separation for more than 15 years. Currently, we participate in two grant projects of the GA CR aimed at increasing the efficiency of membrane separation processes. This doctoral thesis is thematically linked to these projects. The thesis will be focused on the study of theoretical and experimental aspects of the transport of gases and their mixtures in GO and polymer-based membranes.

New possibilities for prediction of beer colloidal stability

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie

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One of the limiting factors of beer stability is its colloidal stability. The colloidal stability of beer is determined by the composition of the colloidal system of beer and is influenced by other factors. The aim of this work is to find such methods of characterization of the colloidal system of beer that would allow us to predict its colloidal stability during the time. Another aim of the work is to find the reasons for reduced colloidal stability in different kinds of beers.

New wastes and their material flow analysis

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

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The dissertation thesis is focused on the analysis of emerging wastes or wastes with increasing amounts due to structural changes in the industrial sector or consumer habits. The aim of the thesis is to identify these wastes, to conduct their material flow analysis, and perform a critical analysis for methods of their utilization or treatment.

New ways in spatial orientation of supramolecular structures for chemical sensors and biosensors

Department: Department of Computing and Control Engineering, Faculty of Chemical Engineering
Study programme: Chemistry

Nonplanar unconventional pi-electron systems

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: RNDr. Irena Stará, CSc.

Annotation

The project is focused on the synthesis of extended (hetero)helicenes, bi(hetero)helicenes, (hetero)cycloarenes and reactivity of helicene pyridazines. In particular, the attention will be paid to chiroptical switches (based on exciton coupling), single-molecule electromechanical properties and charge transport in thin layers. Chirality issues will be central to all endeavours. A concept of the covalent template synthesis of pi-conjugated macrocycles will be explored.

Novel methods of non-target screening and target analysis of food quality and authenticity based on gas chromatography coupled with mass spectrometry

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology

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The analysis of volatiles occurring in raw materials and foodstuffs is an important part of the strategy for assessing their quality and authenticity. In the framework of the doctoral thesis, new methods based on gas chromatography coupled with mass spectrometry employing various types of mass analyzers will be optimized, validated and implemented. The data generated by non-target screening (fingerprinting) of volatiles across large sample sets (e.g. fruit distillates, cannabis-based products, etc.) will be processed using advanced statistical analysis methods enabling identification of quality and authenticity markers suitable for the target analysis of these parameters in practice. The results obtained will be communicated with the manufacturers in order to contribute to the optimization of the production process of their products.

Novel types of substitutions at boron and carbon atoms in carboranes and metallacarboranes directed to non-taditional drugs

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: RNDr. Bohumír Grüner, CSc.

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Aim of this topic is design of novel structural blocks that can be incorporated to design of non-traditional drugs

Nové systémy pro doručování steroidních léčiv

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

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Steroids represent a promising class of drugs for a range of diseases including chronic pain and various neurological disorders. However, many potentially promising lead structures suffer from poor aqueous solubility, which complicates their pre-clinical evaluation. The use of incompatible formulations such as DMSO solutions at the cell culture level, o/w emulsions for parenteral administration during small animal studies, and solid dosage forms for oral administration at the stage of larger animal studies, complicates the understanding and correct translation of results. The aim of this project is to come up with a common formulation platform that would be applicable for pre-clinical testing at all stages. The project will involve the comparison of several formulation approaches, namely liposomes, lipid-coated nanocrystals, mini-emulsions, and impregnation to porous micro- or nano-particles. The feasibility of these formulation platforms will be compared both in vitro and in vivo using several drug substances from the steroid family, both currently known and newly discovered. This project will suit a person with background in chemistry or pharmacy. The project will be carried out in colloaboration with Dr. Eva Kudova, IOCB.

Nucleotides bearing polar or charged functional groups for enzymatic synthesis of modified DNA

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Michal Hocek, DSc.

Annotation

New nucleosides and nucleoside triphosphates bearing polar or charged functional groups (e.g. acidic or basic groups, cationic or anionic substituents etc.) will be designed and synthesized. The modified dNTPs will be studied as substrates for DNA polymerases and as building blocks for enzymatic synthesis of modified or hypermodified DNA bearing different combinations of functional groups in the major groove. These nucleic acids will be used for the selection of aptamers. References: 1. Hocek, M.: "Enzymatic Synthesis of Base-Functionalized Nucleic Acids for Sensing, Cross-linking, and Modulation of Protein–DNA Binding and Transcription" Acc. Chem. Res. 2019, 52, 1730-1737.

Occurrence of microplastics in sewage sludge, effect of thermal hydrolysis

Department: Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology

Oleogely jako systémy pro doručování léčiv

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Annotation

Oleogels, like hydrogels, are semi-solid materials that can contain up to 99 % of a liquid, which is solidified by a three-dimensional polymer network. While hydrogels contain as the liquid and the polymers are hydrophilic, oleogels contain oil and an oleophilic polymer network. Many APIs that are poorly soluble in water could potentially be formulated using oleogels and be either directly dissolved in the oil phase or form a particle depot that would dissolve in the oil gradually and act as a longer-lasting reservoir. The aim of this project is to evaluate the suitablitity of selected oleogel formulations for drug delivery applications from the point of view of manufacturability, drug release kinetics, drug stability, and biological compatibility. The application of oleogels will be demonstrated using several selected APIs both in vitro and in vivo.

On the influence of thermodynamic non-ideality on membrane separations

Department: Department of Physical Chemistry, Faculty of Chemical Engineering

Annotation

The topic of the doctoral thesis is to study the key principles influencing membrane separations of liquids.

Optimisation of selected fruit and vegetable technologies

Department: Department of Food Preservation, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Ing. Aleš Rajchl, Ph.D.

Annotation

Fruit and vegetable processing is a very complex field including a wide range of various procedures. Technology optimization can reduce production costs, improve nutritional and sensory characteristics, reduce content of processing contaminants etc. This dissertation will focus on the optimization of selected food technologies. The dissertation will be conducted in cooperation with production plants and will focus on current problems of production. The aim of this work is the optimization of current fruit and vegetable technologies.

Optimization of Electrochemical Ferrates(VI) Synthesis

Department: Department of Inorganic Technology, Faculty of Chemical Technology

Annotation

The aim of this project is characterization of chemical and electrochemical oxidation processes taking place at the surface of an anode made of iron based materials in strongly alkaline solutions. Deeper understanding of mechanism of these processes allows to enhance efficiency of synthesis of Ferrate (VI) making it economically viable.

Optimization of Fused Filament Fabrication of Polymer Materials

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: RNDr. Miroslav Šlouf, Ph.D.

Annotation

Fused Filament Fabrication (also known as 3D printing) is a routine additive manufacturing technology widely used in industry, science and hobbies. Despite numerous advantages, FFF-made components often suffer from insufficient mechanical performance. The lower mechanical performance is typical of middle- and hobby-level FFF devices. Proposed research is aimed to the optimization of morphology, micro- and macromechanical properties of selected polymers prepared in three different ways: (i) by means of standard processing techniques (such as melt mixing and compression molding), (ii) by means of commercial FFF devices, and (iii) by means of modified FFF device, which could produce samples with improved mechanical properties. The modified FFF device will work with the melted filament in the environment of atmospheric-pressure plasma. Plasma serves as a source of highly-reactive species (excited radicals, molecular ions, and atomic ions). These species cause partial break of polymer chains, followed by cross-polymerization or co-polymerization if co-polymer is added. Prototype of dedicated equipment containing experimental printhead and RF power generator for plasma generation will be developed during the project in order to investigate feasibility for practical application.

Optimization of chosen processes in the field of fine chemicals preparation

Department: Department of Organic Technology, Faculty of Chemical Technology

Annotation

The work will be dealing with the optimization of chosen fine chemicals. In the perfume and pharmaceutical industry, the attention is paid to compounds starting from aldehydes, e.g. cyclamenaldehyde, sandalor, rosaphen and norlimbanol. The aim of this work will be the optimization of all steps leading to prepared compounds with the highest yield. Different catalysts will be tested and the reaction course will be correlated with the catalyst properties and the structure of compounds. The reactions will be performed in both batch and continuous arrangement.

Optimization of mass yield of soybean oil in proces of continous countercurrent extraction

Department: Department of Dairy, Fat and Cosmetics, Faculty of Food and Biochemical Technology

Annotation

The processing of leguminous soybeans yields crude soybean oil and extraction meal. Due to the low original oil content, soybean material is processed directly by solvent extraction with hexane. The quality of nutritionally valuable extraction meal as well as high oil yields depend, among other things, on the pre-treatment operations of the raw soybean material, the control of the extraction process, the composition of the extraction solvent. The whole process is driven by operational costs and the utilization of valuable by-products such as glycerophospholipid concentrates. The aim of this work will be to optimize soybean pre-treatment processes prior solvent extraction, especially evaluation of the efficiency of extrusion and expansion processes, dehulling, flaking and thermal pre-treatments. Further optimization of solvent extraction unit parameters includes the effect of hexane fraction composition on extraction yield (residual fat content in extraction meal). Monitoring of the fat content in soybeans, extraction meal and miscela on-line will be evaluated as well.

Optimizing the production of fermented foods

Department: Department of Food Preservation, Faculty of Food and Biochemical Technology

Annotation

The project will focus on the development and optimization of the production of fermented foods (meat, fruit and vegetable products). The basic factors affecting the quality and safety of fermented products are: starter cultures, quality of used raw materials, microbial contamination of raw materials, recipe, technological processes, fermentation conditions, packaging and distribution conditions. As part of the project, new recipes will be developed and the production of processes will be optimized, including selection and dosing of suitable starter cultures, packaging and distribution of fermented meat, fruit and vegetable products. Within the project, individual technological processes will be optimised, both in a pilot plant environment and at individual food manufacturers.

Organophosphorus compounds for the synthesis of π-conjugated molecules

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programme: Chemie

Organosilica materials for heterogeneous catalysis of enantioselective reactions

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemie, Chemistry
Theses supervisor: doc. Dr. Ing. Jana Hodačová

Annotation

The project deals with a development of novel heterogeneous catalysts of enantioselective reactions based on the hybrid organic-inorganic materials. Appropriate enantiomerically pure organic compounds will be synthesized, and then they will be transformed to the so called bridged bis(trialkoxysilanes). The bridged bis(trialkoxysilanes) will be subjected to a sol-gel process under various experimental conditions. The obtained solid organosilica materials will be fully characterized and their abililies to catalyse selected enantioselective reactions will be studied. Based on the obtained results, the structure of the enantiomerically pure organic fragment as well as the conditions of the sol-gel process will be optimized. The project will be solved in collaboration with the Technical University in Liberec.

Oxygen gas diffusion electrodes

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Martin Paidar, Ph.D.

Percolation oxidic structures based on heterojunctions: application in sensing of toxic gases

Department: Department of Physics and Measurement, Faculty of Chemical Engineering
Theses supervisor: prof. Ing. Dr. Martin Vrňata

Annotation

During recent years there is a remarkable progress in the development of oxidic gas-sensing structures. In the terms of electric properties - instead of "conventional" homogeneous resistors based on one oxidic phase, more frequently the heterojunctions are utilized, that are formed by grains of two different oxides with different bandgaps. Thus the sensitive layer of resulting sensor has a character of two- or three- dimensional percolation structure. To ensure the proper functionality of such a structure, two critical requirements have to be fulfilled: a) total separation of both oxidic phases; b) grain dimensions in the order of units of microns. On interaction of detected gas with the above described heterostructure, the energy-barrier height on heterojunction is modified and, simultaneously, dramatic modulation of conductivity of both phases occurs. As a result, the "integral" value of electric resistance of such a sensor is changed by several orders of magnitude. This thesis is focused on: (i) preparation of oxidic heterostructures by thermal oxidation method; (ii) characterization of gas-sensing properties of these sensors.

Pesticide residues and their degradation products / metabolites in food crops and products thereof.

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology

Annotation

The use of pesticide preparations for crop protection results in many cases in a transfer of residues into human food chain, thus they are posing a health risk. The doctoral work will be focused on implementation of advanced instrumental methods for monitoring of pesticide residues and their metabolites / degradation products in various types of foods, both target analysis and non-target screening will be employed for this purpose. Attention will be also paid to the assessment of human exposure to pesticide residues through analysis of various biotic matrices. The metabolomic studies aimed at evaluation of the impact of pesticides on crop quality will be performed, too.

Pharmaceutical substances chirality identification from powder diffraction data

Department: Department of Solid State Chemistry, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials
Theses supervisor: doc. Dr. Ing. Michal Hušák

Annotation

Pharmaceutically interesting compounds are often not available in a form of crystals suitable for single crystal X-ray structure determination. The structure can be determined from powder - unfortunately standard experiment make chirality determination impossible. The main aim of this work will be to calibrate the crystal structure by adding an ion or cocrystallization partner with known chirality.

Pharmaceutical substances crystal structure solution by combination of data from ss-NMR, structure prediction and powder diffraction

Department: Department of Solid State Chemistry, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials
Theses supervisor: doc. Dr. Ing. Michal Hušák

Annotation

When we have no singe crystal diffraction data available we can solve the structure from alternative experiments. We can predict the structure and confirm the prediction by experimental and theoretical ss-NMR data comparison. The process can be combined with data obtained by powder diffraction. The target of this work is to test this synthetic approach for crystal structure solution.

Phosphole cross-coupling reactions

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programme: Chemie

Phosphorus recovery from wastewater

Department: Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology
Theses supervisor: prof. Ing. Jiří Wanner, DrSc.

Photocatalytic degradation of new types of organic pollutants in wastewater

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: Ing. Martin Kuchař, Ph.D.

Photochemical processes in astrochemistry

Department: Department of Physical Chemistry, Faculty of Chemical Engineering

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The Thesis will focus on processes initiated by light in various astrochemically relevant molecules and system. In particular, the applicant will study ice particles and the role of high-energy radiation in astrochemistry. For more information, see http://photox.vscht.cz.

Photoelectrodes for pollutant removal and hydrogen generation from water using solar light

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: prof. Dr. Ing. Josef Krýsa

Annotation

Production of hydrogen as an alternative energy source/carrier is becoming recently very important and intensively studied process. One of the promising options is direct production of hydrogen from water via solar light. Very important process is also removal of persistent pollutants in waters by advanced oxidation processes, one of them is photo-electrochemical oxidation. The topic of the present thesis is the preparation of semiconductor photoanodes and photocathodes (eg. WO3, BiVO4, CuO, CuFeO2, atd.) for photo-electrochemical water splitting or photo-electrochemical removal of persistent pollutants. Different methods of preparation (aerosol pyrolysis, spray pyrolysis, etc. ) will be used and the resulting films will be characterised (XRD, GDS, UV-VIS, BET, SEM) and their photo-electrochemical properties (open circuit potential, photocurrent, IPCE) evaluated. The attention will be given to the influence of composition, crystalline phase, layer thickness and porosity. The best photoanode and photocathode layers will be applied in the tandem solar photo-electrochemical cell and its efficiency for water decomposition to hydrogen and oxygen by sunlight will be determined.

Phylogenetic diversity and functional potential of microbiota in selected extreme biotopes

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Study programme: Mikrobiologie
Theses supervisor: doc. Ing. Ondřej Uhlík, Ph.D.

Annotation

Microorganisms, primarily prokaryotic, are the most diverse group of organisms on our planet in terms of phylogeny and metabolism. With this in mind, also the range of biotopes that host prokaryotic organisms is tremendous. Many bacteria and majority of archaea are classified among extremophiles - i.e. organisms living at the edge of life. The objective of the proposed project is to characterize microbial populations in extreme biotopes – chronosequence of permafrost (permafrost of differing age) from central Alaska and soils from salt marshes and moffettes of the Soos National Natural Reserve, Czech Republic. The characterization will be conducted by two major routes – metagenomics and modified cultivation techniques.

Physico-chemical properties of model electrolytes for next-generation energy storage devices

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

Annotation

Following current trends in electrochemical technology research, this PhD project will deal with systematic investigations towards safe, sustainable and high-performance electrolyte media for next generation rechargeable batteries and supercapacitors. It will focus on experimental determination of essential physico-chemical properties for some prospective water-in-salt electrolyte (WiSE) mixtures and elucidation of the behavior observed. Solubility and phase transitions of selected lithium and sodium salts in water and model water/cosolvent mixtures will be examined, to delimit the homogenous liquid domains. Chemical, electrochemical and thermal stability of the WiSE formulations will be explored and their water activity, density, viscosity, and ion conductivity measured as functions of composition and temperature, these properties being then correlated and analyzed in terms of suitable models. Computation chemistry methods will also be employed, to get insight into molecular background of the observed behavior.

Physicochemical and biological properties of nanoparticles made of amphiphilic copolymers with different architectures

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Jiří Pánek, Ph.D.

Annotation

The aim of the project is to compare physico-chemical and biological properties of nanoparticles prepared by self-organization of various amphiphilic copolymers in aqueous milieu; the thesis is expected to answer the question if we should prefer block or gradient copolymer for purposes of biomedical applications. The ability of the nanostructures to encapsulate active molecules will be assessed, for instance therapeutic compounds, imaging agents, or inorganic probes. Exploited characterization techniques include UV/VIS spectrometry, fluorescence spectroscopy or fluorescence correlation spectroscopy; finally, the biological properties of the prepared systems will be tested in vitro and in vivo in collaborating biological laboratories. The topic is multidisciplinary and might be further adjusted according to the individual interests of a student. If the student is interested in, it is possible to make part of the study at collaborating workplace in France within the program “double degree PhD”, the deadline is February 14, 2020 (see https://studium.ifp.cz/cz/doktorandi/barrande-fellowship-program/ ). If you are interested in this option, please contact the supervisor as soon as possible.

Plant alkaloids in natural products and foodstuffs

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology

Annotation

Dietaey exposure to toxic pyrrolizidine and tropane alkaloids is currently of a high health concern, maximum levels in various food commodities are going to be established by EU Commission. The doctoral thesis will focus not only on the screening of occurrence of plant alkaloids in food supply, but also on the investigation of their changes during various technological procedures emplpyed for natural raw materials processing. Using advanced instrumental methods, degradation products of targeted alkaloids will be characterized. To assess dietary exposure, relevant biomarkers will be identified and monitored in urine of consumers with a high intake of commodities typically contaminated by pyrrolizidine or tropane alkaloids.

Plasmon catalysis - a new trend in chemical transformations

Department: Department of Solid State Engineering, Faculty of Chemical Technology
Theses supervisor: Mgr. Oleksiy Lyutakov, Ph.D.

Platforma pro současné disoluční a permeační testování formulačních prototypů

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Annotation

Supersaturating drug delivery systems such as amorphous solid dispersions or amorphous drugs loaded to mesoporous carriers can significantly increase the dissolution rate of poorly soluble APIs. However, in order to translate this into increased bioavailability, the API must be absorbed from the GI tract. The aim of this project is to develop methodology for the simultaneous measurement of dissolution and permeation under biorelevant conditions, and so enable early-stage evaluation of formulation prototypes that minimized false positives as well as false negatives. Permeation methods based on model lipid layers, cell cultures and co-cultures, and hollow fibre based modules will be compared and their predictions compared from the results of in vivo studies for several chosen molecules from the BCS class II and class IV category.

Pokrocile formulace za použití mikročástic z přírodních zdrojů

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Annotation

Nature provides numerous examples of microparticles with a diversity of sizes and shapes that are available in abundant quantities. These include pollen, various single-cell microorganisms and their spores, the silica skeletons of diatoms, yeast, extracellular vesicles of both plant and animal origin, but also sub-cellular compartments such as vacuoles and other organnelles. The biological origin of these particles can provide several interesting application properties such as biodegradability, biocompatibility, slight immunogenicity which could enable specific targeting (e.g. to macrophages or to the lymphatic system), resistence against environmental factors such as moisture or oxygen diffusion, resistance to digestive enzymes which could prove useful for oral delivery, or the presence of specific surface moieties that could enable very specifc targeting (e.g. extracellular vesicles). The aim of this project is to explore the use potential use of selected categories for the formulation of bioactive substances (mainly pharmaceutics) which are challenging in traditional formulation approaches. This includes poorly soluble drugs, highly lipophilic drugs, or peptides. The project will consider processes for the harvesting of natural particles, their physico-cehmical characterisation, drug encapsulation methods, investigation of release kinetics, and evaluation of application potential by both in vitro and in vivo studies.

Pokročilé metody formulace léčiv pro topické podání

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Study programme: Drugs and Biomaterials

Annotation

Although skin appears to be a macroscopically homogeneous and biologically passive structure, it is exactly the opposite: it is incredibly heterogeneous both chemically and structurally, and it is host to a diversity of active cells such as macrophages and bacteria. Traditional approaches to topical delivery have relied on relatively simple systems such as passive diffusion from water- or oil-based solutions or creams/gels. The aim of this project is to investigate bioactive transport as a mechanism for topical delivery and find a solution to such molecules as therapeutic peptides, which are known to be extremely challenging to formulate and delivery to the body. This project will explore the use of drug delivery systems that are actively phagocytised for targeting macrophages residing in the skin. These drug delivery systems will include naturally sourced polysaccharide shells or lipidic vesicles obtained from single-cell organisms. Their mild immunogenicity, biocompatibility and ability to encapsulate a broad range of molecules will be utilized for the formulation of APIs that have proven to be challenging by traditional means.

Polyamide nanocomposites

Department: Department of Polymers, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: prof. Ing. Jiří Brožek, CSc.

Annotation

The work is focused on the preparation and characterization of novel hybrid materials based on layered inorganic fillers (layered silicate, double hydroxide and graphene) and polyamide 6. These materials will be prepared by in situ polymerization of hexano-6-lactam in the presence of fillers or by melt blending of components.

Polymer electrolytes for energy conversion devices

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: Ing. Jaromír Hnát, Ph.D.

Annotation

Polymer ion selective materials are well established in the many technologies including the environment protection, food industry and large scale production of the basic chemical substances. Energy conversion devices represent the recent but sharply growing field of the ion selective membrane utilization. The work is focused on the complex characterisation of the physio-chemical and electrochemical properties of the developmental ion selective polymer electrolytes.

Polymer-based membranes for highly selective removal of CO2 from biogas

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: doc. Ing. Zdeněk Slouka, Ph.D.

Annotation

Membrane-based gas separation technology has contributed significantly to the development of energy-efficient systems for natural gas purification. Also CO2 removal from biogas, with CO2 contents exceeding 40% has more recently known rapid growth and development. Major challenge of polymer membranes for gas separation is related to their susceptibility to plasticization at high CO2 partial pressures. CO2 excessively swells the polymer and eases the permeation of CH4, thus reducing the selectivity. Membrane crosslinking is one of the best ways to prevent the plasticization. Mixed matrix membranes (MMMs), consisting of fillers homogeneously dispersed in a polymeric matrix aim at combining the processibility of polymers and the superior separation properties of the porous fillers. Metal-organic frameworks (MOFs) are such materials which have attracted considerable attention due to their tailorable functionality, well-defined pore size, pore tunability and breathing effects. MMMs for biogas upgrading will be prepared with increased permeabilities by choosing proper MOF/polymer combinations and modifying the thermal treatment, employing core-shell MOF materials with high bulk porosity and a selective shell layer.

Polymer-bound reactive oxygen species precursors for cancer therapy

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Miroslav Vetrík, Ph.D.

Annotation

Radiation therapy applies ionization radiation to cancer tissue to elicit the reactive oxygen species (ROS) production to kill the cancer cells. The radiation treatment can be boosted by application of radiosensitizers. The aim of this thesis is to prepare a polymer material that is able to deliver artificial ROS into the cancer cells or deliver precursors that will trigger the ROS generation at the place of action. Moreover, specific hypoxic markers can be utilized for active targeting to hypoxic tumor tissue. The student will design and prepare polymer systems which will be releasing ROS as: superoxide, peroxides or singlet oxygen in desired cancer site. The project is highly multidisciplinary, it includes polymer and organic syntheses, characterization techniques such as FTIR, 1-H 13-C NMR, SEC, DLS, SAXS and SANS. Moreover, the student can participate on biological studies which will be performed on collaborating workplace. If the student is interested in, it is possible to make part of the study at collaborating workplace in France within the program “double degree PhD”, the deadline is February 14, 2020 (see https://studium.ifp.cz/cz/doktorandi/barrande-fellowship-program/ ). If you are interested in this option, please contact the supervisor as soon as possible.

Polymeric bone cements

Department: Department of Polymers, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: Ing. Lenka Malinová, Ph.D.

Annotation

The work will be focused mainly on the preparation of biodegradable polymeric bone cements, which can be used for fixing bone implants. Part of the work will be deal with the synthesis and modification of bone cements based on poly(propylene fumarate). The curing, mechanical properties, adhesion to metal, rate of degradation and biocompatibility will be tested on these materials. Another part of the thesis will be focused on the already used medicinal polymer materials where their modification will be tested for the possibility of their use as bone cements. Different ways of the curing of bone cements will be tried to take account of the possibility of their preparation directly in the operating room.

Polymeric drug carriers for immunooncotherapy

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Petr Chytil, Ph.D.

Annotation

Immunotherapy became the highly studied type of tumor treatment, either independently or in combination with efficient chemotherapy in the last decade. Polymer drug carriers can be used for the increase of synergism of both these therapeutic approaches, and thus, to increase the tumor treatment efficiency by “immunooncotherapy”. Polymer drug carriers are non-toxic, non-immunogenic and biocompatible polymer materials enabling lower drug blood-clearance and minimization of side-effects. The doctoral project theme will consist in the development of new polymer materials suitable as drug carriers enabling controlled release of active compounds in target, i.e. tumor tissue. The polymer materials will be formed by tailor-made hydrophilic or amphiphilic copolymers. The selection of proper immunomodulation agents and the type of their linkage to the carrier will be in the spotlight. The theme is suitable for graduates of chemistry, eventually pharmacy. The student will learn new skills in the synthesis and methods of characterization and can participate in biological characterization in internal or international cooperating laboratories. We offer interesting and varied work in a well-established team of Biomedical polymers, affording hi-tech equipment and material background.

Polymeric materials for advanced applications: structure, properties and processing

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Zdeněk Starý, Ph.D.

Annotation

Nowadays new applications and processing technologies place new and bigger demands on polymeric materials. Materials for 3D printing or electrically conductive polymer composites can serve as typical examples. In most cases these systems have a heterogeneous phase structure, which influences the end-use properties of the final material to a large extent. The aim of the work is a description of relationships between structure and properties of materials relevant for practical applications. Work activities include a preparation of polymeric materials and structural investigations by means of electron microscopy. Furthermore, mechanical and flow behaviour of prepared materials will be studied in detail.

Polymeric materials with antibacterial effects

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Petr Chytil, Ph.D.

Annotation

The resistance of bacteria to antibiotics and bacterial inflammation of mucosa are serious medical problems. Investigation of materials enabling to overcome protective barriers of bacteria and their plaques or protection against their adhesion to mucosa should increase the treatment efficiency of diseases and infections caused by bacteria. In advance, biocompatible polymer materials can be used either as drug carriers overcoming biological barriers or as materials protecting against the dissemination of bacterial inflammation. The project theme will consist in the preparation and study of properties of new polymer materials suitable as carriers of antibiotics aiming to bacterial infections and related symptoms. Polymer materials will be designed as polymer carriers of antibiotics, enabling their controlled activation, or intended for the prevention of adhesion of bacteria on human mucosa. The theme is suitable for graduates of chemistry, eventually pharmacy. The student will learn new skills in the synthesis and methods of characterization and can participate in biological characterization in internal or international cooperating laboratories. We offer interesting and varied work in a well-established team of Biomedical polymers, affording hi-tech equipment and material background.

Polymeric nanomaterials for neoadjuvant multimodal therapy of advanced neoplastic diseases

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie

Annotation

The main aim of this work will be the development of new multi-component biocompatible and non-immunogenic polymer-based nanotherapeutics and nanodiagnostics adapted for multimodal advanced therapy of neoplastic diseases. The dissertation will be based on the preparation of new polymeric nanomaterials that will allow the controlled delivery of active therapeutic agents or tumor visualization for fluorescently navigated surgery. These nanomaterials will serve as a tool for multimodal neoadjuvant therapy based on sequential administration of chemotherapy and immunotherapy in combination with fluorescently navigated surgery. The work will focus on tailor-made solutions using covalent binding of active molecules with several functions: targeted transport of active molecules, their protection during transport against degradation and controlled release based on site-specific stimuli. The thesis will consist in the design, synthesis and study of physico-chemical and biological properties of polymeric materials. The applicant's knowledge and experience in organic or macromolecular chemistry is an advantage, along with the desire to learn new things in other fields, such as biochemistry. The work assumes close cooperation with cooperating biological teams in the Czech Republic and abroad.

Polymeric plasticizers based on caprolactone

Department: Department of Polymers, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: Ing. Radka Kalousková, CSc.

Annotation

The study will be focused on the application of ecologically friendly polymeric plasticizers based on caprolactone to PVC plasticizIng. New types of plasticizers will be synthesized and characterized. An innovative part is represented by unconventional procedures in plasticizer application and formation of plasticizer during PVC manufacturing process, i.e. polymerization of low-mass substances

Possibilities of increasing beer foaming

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie

Annotation

The most important characteristic of the Czech lager is its foam. The foam must have a certain appearance and stability. There are very important substances that create and support the foam and its stability. The aim of the thesis is to determine these substances and to test the possibilities of increasing their content. Attention will also be paid to substances that have a negative effect on the foam, their characterization and, possibly, decrease their content.

Possibilities of reducing the ecological burden from single-use food contact materials

Department: Department of Food Preservation, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Ing. Aleš Rajchl, Ph.D.

Annotation

The impact of packaging materials on the environment becomes one of the important issues of development in packaging technology with the growing environmental awareness of the public. In this context, complex aspects of single-use food contact materials will be addressed of the study. The study will be based on available data and information from Life Cycle Assessment (LCA) of these materials. The optimal substitution will be found primarily on the basis of these LCA results. Part of this study will be focused on testing of these substitutional materials including tests of their functional properties (water vapour and oxygen permeability, mechanical and optical parameters) and safety (overall and specific migration tests).

Precipitation of calcium phosphates during interaction of biomaterials with simulated body fluids

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

Annotation

The study will be oriented on precipitation of calcium phosphates from selected simulated body fluids. The aim is to experimentaly measure the kinetics of phosphates precipitation and describe it using chosen or newly developed physico-chemical models

Prediction and experimental determination of transport properties of mixed-matrix membranes

Department: Department of Organic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Pavel Čapek, CSc.

Annotation

The work is aimed at simulation and experimental determination of transport properties of mixed-matrix membranes that differ from each other in polymer and filler materials. In addition, the membranes containing different fractions of filler particles will be investigated. Statistical treatment of obtained data will accompany the experimental determination of permeability. Permeability will also be modelled on the basis of reconstructed microstructures of the membranes and transport properties of components forming the membranes.

Preparation and characterization of mixed matrix membranes for gas separation

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Dr. Ing. Vlastimil Fíla

Annotation

Gas membrane separation represents one of the perspective and energy saving alternative with respect to the present separation processes (PSA, TSA etc.). In the frame of this work the mixed matrix membranes, combining the perspective properties of the both, microporous and polymeric membranes, will be prepared and characterized. The microporous material e.g. ZIF-8, silicalite-1, ETS, FAU, TS-1, AFX, MOF will be used as filler and combined with polyimide matrix. The key issue of mixed matrix membranes preparation which needs to be solved is the adhesion and interface interactions of filler and polymer because of their effects on compactness and selectivity of membrane. The aim of this study is evaluation of different possibilities of microporous and polymer phase modifications with respect to the compactness of membranes and their selectivity and permeability in selected systems of hydrocarbons, CO2 and H2.

Preparation and characterization of nanostructures with specific magnetic properties

Department: Department of Solid State Engineering, Faculty of Chemical Technology

Preparation and characterization of porous materials for photo-catalytic conversion of CO2

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Annotation

Increasing amount of CO2 Application of enzymes for preparation of various biomolecules is ever growing field. This is due to low energy demand and high specificity of the catalyzed reactions. Significant disadvantage of this technology is loss of enzyme activity and removal of the enzyme from the reaction system. Solution for these problems is enzyme immobilization on a suitable support. In this project we will use recently developed technology of reactive gelation suitable for buildup of 3D porous material with tunable porosity and pore size distribution combined with covalent bonding of enzymes to the surface of prepare material. To understand impact of enzyme-surface interactions we plan to use various building blocks made out of polymers or silica combined with different spacer molecules placed between porous material and enzyme anchoring group. In this way we will be able to study impact of these interaction on the enzyme activity and yield of reaction. Once the system will be established, we will further investigate effect of process conditions (dispersed porous aggregates vs. packed bed), effect of ionic strength, pH, substrate concentration etc., on the yield and selectivity of the performed enzymatic reaction. In the last part of the project, the system will be extended towards multiple consequent enzymatically catalyzed reactions. Student will be involved in the preparation of porous material and its characterization as well as in the surface functionalization with suitable enzyme anchoring moieties. Consequently, student will be responsible for enzyme attachment and testing of its activity and yield.

Preparation and characterization of silicon nanoparticles using non-thermal plasma technique

Department: Department of Physics and Measurement, Faculty of Chemical Engineering

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Since the observation of efficient room-temperature photoluminescence (PL) of silicon nanocrystals (Si-NCs) these nanostructures have attracted significant attention. Much effort has been made to develop optimal preparation techniques and post preparation treatments of Si-NCs that would provide sufficient amounts of Si-NCs bearing properties specifically designed for a particular application (solar cells, light generation, bioimaging, biology and medicine etc.). One of the most promising preparation/termination techniques of Si-NCs proved to be the application of non-thermal plasma (NTP, radio frequency or dielectric-barrier discharge). In contrast to other techniques, the application of non-thermal plasma is capable of synthesising orderly higher amounts of Si-NCs (about 1mg/min) lacking of chemical artefacts. Student will optimize the preparation of Si-NCs by non-thermal plasma. Student will be opimiting mainly composition and flow of working and carring gas, plasma source power and studing the influence of ambient conditions on SI-NCs properties. Properties of NCs will be characterized mainly by time integrated and resolved photoluminescence spectroscopy and EDS.

Preparation and crystal growth of scintillating materials based on alkali halides and study of new doping concepts

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

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The topic of this work will be focused on the preparation and crystal growth of scintillating materials based on hygroscopic alkali halides, e.g. sodium iodide (NaI), cesium iodide (CsI), doped with monovalent cations (e.g. Tl), by vertical Bridgman and micro-pulling-down methods. The work will be performed in collaboration with the company NUVIA a.s. and Physical Institute, ASCR. The study will aim on the optimization of the growth technology of bulk NaI:Tl single crystals prepared by the vertical Bridgman method and on the study of new co-doping concepts in alkali halides (NaI:Tl) by cations of higher valence state, e.g. Sr, Ca, Eu2+. The composition (elemental and phase) of prepared materials and their crystals as well as the thermal, optical, luminescence, and scintillation properties will be studied. The goal of this work is to improve the optical quality of prepared crystals (for industrial applications), the optimization of the crystals composition to improve the scintillation parameters such as high light yield and fast scintillation response. This work will be realized partly under employment contract with the possibility of future career development at NUVIA.a.s.

Preparation and study of sesquiterpene lactones

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: prof. RNDr. Pavel Drašar, DSc.

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Subject of the project is the synthesis of derivatives of sesquiterpene lactones as biologically active substrates. Changes in their skeleton and its conjugation with selected synthons shall lead to novel compounds that will be investigated from the point of view of interaction with receptors and in terms of possible supramolecular assembly properties.

Preparation of co-amorphous solid forms of drug substances

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Annotation

Low solubility of drugs represent significant drawback in development of new drug products. Possibility to improve this limitation is formulation of drug molecules in amorphous forms, e.g. using polymers formulated in hot-melt extrusion process, precipitation from solution or via spray drying. Despite significant improvement of drug dissolution characteristics, commonly there is a limited amount of drug, which can be solubilized within a polymeric matrix and thus prevent drug molecule to recrystallize. New approach to prepare amorphous drugs is to use small molecules, which can form co-amorphous solid forms. In this thesis, we will investigate possibility to prepare co-amorphous solid forms for selected drug molecules. Student will start with the screening process where various small molecule excipients will be tested using ball mill technique. Prepared solid forms will be characterized by XRD and DSC. For suitable candidates we will measure long-term stability under elevated temperature and humidity as well as measure their dissolution kinetics. In the last part of the project, student will be responsible for process scale-up and testing of process robustness.

Preparation of copolymers for immobilization of biomolecules and compounds with catalytic activity

Department: Department of Polymers, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: Mgr. Soňa Hermanová, Ph.D.

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The thesis is focused on the synthesis and characterization of biodegradable copolymers by tandem ring opening and other polymerization mechanisms. Particles and vesicules will be made from copolymers and enzymes/compounds with enzyme-like aktivity will be immobilized into the cavity or bilayer membrane. Resulting system will be evaluated according to efficiency and biocompatibility for medicinal application.

Preparation of drug delivery carriers for treatment of rheumatoid arthritis

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Study programme: Drugs and Biomaterials

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Rheumatoid arthritis (RA) is a chronic autoimmune disorder, mainly affecting joints that are identified by inflammation and swelling of the synovium of the joint. Today, apart from the conventional synthetic disease-modifying antirheumatic drugs (DMARDs), a number of biological DMARDs have been approved. Recently the first targeted synthetic DMARD has also been approved, while other targeted compounds are in the development phase. Particularly interesting is group of drugs which are based on gold complexes. Despite their promising properties, these drugs has low solubility in water and thus low bioavailability. Therefore, within this project we plan to investigate possibility to prepare more soluble compounds of gold complexes using crystal engineering approach as well as formulate these drugs into various nanocarriers. Combination of various preparation and analytical techniques will be used to investigate stability of gold complexes. In the next step we will investigate the impact of encapsulation matrix or complexation partner on the dissolution characteristics of gold complexes.

Preparation of electrospun nanofibrous carriers for deposition of catalyst nanoparticles and immobilization of living cells

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: Ing. Karel Soukup, Ph.D.

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The main aim of the proposed PhD project is focused on assessment of the specific properties of the novel polymeric nanofibrous materials prepared by electrospinning technique in applications as effective catalyst supports and promising scaffolds for living cells. Other targets of this project will be specifically addressed to the optimization of the electrospinning process parameters with respect to properties of the prepared supports, deposition of the catalytically active centers or living cells. Additionally, assessment of the effect of support microstructure on the phenomenological kinetics of model reactions and adhesion of the cells will be performed as well. Studied model reactions will involve both reaction in gas-phase (the total oxidation of volatile organic compounds) and liquid-phase (selective hydrogenation of organic unsaturated compounds).

Preparation of functionalized pyrenes by C-H activation

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programme: Chemie

Preparation of olefin block copolymers

Department: Department of Polymers, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Jan Merna, Ph.D.

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The thesis will be focused on the preparation of block copolymers based on olefin and diene monomers by coordination copolymerizations. The focus will be on copolymers with blocks of different properties, e.g. hard and soft blocks. Principles of coordination chain transfer polymerization and chain-shuttling polymerization will be applied. Introduction of polar functional groups will also be of interest. The work will include organometallic synthesis of catalysts, polymerization experiments in presence of various transfer agents and full characterization of obtained polymers.

Preparation of organic single crystals based on pharmaceutical materials and characterization of their properties

Department: Department of Solid State Chemistry, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials
Theses supervisor: Ing. Jan Čejka, Ph.D.

Annotation

Topic of this work will be focused on preparation and crystal growth of volatile and subliming organic compounds with accent on active pharmaceutical ingredients (polymorhps, solvates, salts or cocrystals) from gaseous phase and solution in order to prepare large-volume crystals thereof. The work will be focused on sublimation apparatus design and optimization of the crystal growth procedure of organic compounds from gaseous state using horizontal two section resistive furnace with separate temperature regulation. This method is based on transferring (subliming) the starting material into gaseous state in the storage part of the growth system and its subsequent crystallization (desublimation) in the dedicated coolest place of the system. Setting of suitable temperature regime in both furnace sections defines and controls the growth rate of growing crystal. An integral part of the work comprises: (i) a new crystallization container divided into storage and crystallization stages will be designed, (ii) growth conditions (temperature gradient in the furnace, temperature regimes) will be optimized, and (iii) the physical, structural and optical properties of the prepared crystals will be characterized. Second part of this work will be focused on preparation of crystals of model organic compounds grown from solution. The solvents influence on the crystallization process and final crystal quality will be evaluated. Results of characterizations performed on crystals obtained from diverse procedures as well as of used procedures will be compared.

Preparation of porous materials for enzyme immobilization and their application in biocatalysis

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

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Application of enzymes for preparation of various biomolecules is ever growing field. This is due to low energy demand and high specificity of the catalyzed reactions. Significant disadvantage of this technology is loss of enzyme activity and removal of the enzyme from the reaction system. Possible solution for these problems is enzyme immobilization onto a suitable support. In this project we will use recently developed technology of reactive gelation suitable for synthesis of 3D porous material with tunable porosity and pore size distribution combined with covalent attachment of enzymes to the surface of prepare material. To understand impact of enzyme-surface interactions we plan to use various building blocks made out of polymers or silica combined with different spacer molecules placed between porous material and enzyme. In this way we will be able to study impact of these interactions on the enzyme activity and yield of biocatalytic reaction. Once the system will be established, we will further investigate effect of process conditions (dispersed porous aggregates vs. packed bed), effect of ionic strength, pH, substrate concentration etc., on the yield and selectivity of the performed enzymatic reaction. In the last part of the project, the system will be extended towards multiple consequent enzymatically catalyzed reactions. Student will be involved in the preparation of porous material and its characterization as well as in the surface functionalization with suitable enzyme anchoring moieties. Consequently, student will be responsible for enzyme attachment and testing of its activity and yield. Combination of several analytical techniques including SEM, light scattering, BET measurement, Hg porosimetry, XPS, HPLC etc., will be used to characterize material properties and test behavior of immobilized enzymes.

Preparation of porous materials using phase inversion approach

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: prof. Dr. Ing. Juraj Kosek

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The aim of this PhD project is a study of preparation of porous (bio)polymeric materials with well-defined microstructure of pores suitable for various applications, such as membrane separations or scaffolds in tissue engineering. Principal method used for the fabrication of porous materials explored in this project is the phase inversion, which consists of several steps: (i) formation of homogeneous solvent-polymer mixture, (ii) externally induced change in system Gibbs free energy of mixing leading to phase separation, (iii) removal of the solvent from the “frozen” porous polymer matrix. The alteration in Gibbs free energy of mixing can be done in various ways, for instance by addition of immiscible species (nonsolvent) to the system (nonsolvent induced phase separation, NIPS), or by rapid decrease of thermal energy (thermally induced phase separation, TIPS). This work will focus on testing both NIPS and TIPS, as well as their combination (N-TIPS). As a primary experimental project, it involves screening for suitable polymer-solvent(-nonsolvent) combinations (considering also potential biocompatibility of the prepared tissue scaffold), thermodynamic characterization of the system (including its theoretical description), construction of the apparatus for material fabrication, preparation of the porous material and characterization of its morphology and technical properties (e.g. separation performance, dynamics of biodegradation, mechanical properties). There are two ultimate goals of this project: (i) experimental mapping between the phase separation physical conditions and final morphology of the prepared material, and (ii) process scale-up proposition, and optimisation of the material production method, including solvent removal. The project will therefore contribute to the understanding of hetero-phase material morphogenesis during phase separation process, and will offer new classes of materials suitable for real life applications. The student will work with both traditional polymers and with newly emerging biodegradable materials, and will get opportunity to use state-of-the-art methods of morphological characterization, including scanning electron microscopy (SEM), atomic force microscopy (AFM), 3D computed micro-tomography (mCT), confocal Raman microscopy and others. The project will be carried out in close cooperation with Czech company MemBrain, Central European Institute of Technology (CEITEC), and Process Engineering for Sustainable Systems Section of Katholieke Universiteit Leuven (KU Leuven). Contact: Prof. Juraj Kosek, PhD UCT Prague, Technicka 5, 166 28 Praha 6, Czech Republic E-mail:Juraj.Kosek@vscht.cz Phone: +420 220 44 3296

Preparation of solid surfaces with a molecular receptor covalently anchored, and studies of their usability in sensors construction

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programmes: Chemistry, Chemie

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The aim of this work is to modify the chemical structure of molecular receptors functional in solution so that they can be covalently attached to a solid surface or prepare a polymer. Study the functionality and usability of such materials for sensor construction.

Preparation of stably transfected cell lines for in vitro testing of cell stress and toxicity

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Tomáš Macek, CSc.

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Cell-based model systems are being used increasingly to screen compounds for toxic effects because they allow mechanism-centred assays to be used in rapid, high-throughput approaches. Bioluminescence-based reporter gene assays that measure genetic response element activity are well suited to this approach. In addition, signalling pathways involved in the cellular stress response have been identified as valuable screening targets that underlie biological responses and may be predictive of toxicity in the whole organism. Here, we will use a panel of response element vectors targeting key pathways involved in the cellular stress response and prepare the stably transfected lines. These cell lines will serve for the testing of well characterized model compounds to demonstrate how the vectors can be used in reporter gene assays, either individually or as a panel, to profile compounds for the ability to cause cellular stress and toxicity.

Preparation of stimuli-responsive polymer nanomedicines using microfluidic nanoprecipitation – the in vitro and in vivo performance under simulated physiological conditions

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Eliezer Jager, Ph.D.

Annotation

Nanomedicines gain much more relevance in biomedical applications if they are tailored to be degradable in response to certain external stimuli. Such stimulus may be enzymatic removal of protecting groups, a pH change, light or the presence of reactive oxygen species (ROS) in cancer. Herein, imbalances on the cells micro-environment (pH changes, ROS production) will be explored for the synthesis of stimuli-responsive polymers and block copolymers. Inspired by the ease and effectiveness of the self-assembly of amphiphilic block copolymers in solution, several polymer nanomedicines, i.e., micelles, nanoparticles and vesicles will be designed to display tunable stimuli degradation in the presence of physiologically relevant changes in pH, temperature or ROS concentrations and will be prepared by microfluidic nanoprecipitation. This technique allows us the production of uniform particles with controllable size, shape and surface chemistry in a reproducible manner. The produced polymer self-assemblies will be characterized using standard scattering techniques (DSL/SLS/ELS, SAXS and SANS) and by microscopy. The effectiveness of the polymer nanosystems will be evaluated in in vitro and in in vivo models simulating the physiological balanced and imbalanced of the microenvironment.

Pressure driven membrane separation processes for wastewater treatment

Department: Department of Environmental Chemistry, Faculty of Environmental Technology
Theses supervisor: doc. Dr. Ing. Martin Kubal

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Membrane separation technologies have become popular in the treatment of heavily polluted wastewater and contaminated groundwater in the field of environmental protection. The aim of this work is to find a ,,zero discharge" concept in wastewater treatment using a combination of membrane processes, suitable pre-treatment such as antiscalant dosing and post-treatment of concentrate such as stabilization / solidification and advanced oxidation processes.

Pretreatment of sludge by thermal hydrolysis – impact on dewaterability and structure of digested sludge

Department: Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology

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Thermal hydrolysis is established method of sludge pretreatment improving biodegradability of sludge and biogas yield during anaerobic sludge digestion. The sludge structure change after hydrolysis and its impact on sludge dewaterability is very important from practical point of view. The sludge structure and dewaterability will be studied at different types and conditions of thermal processes. Finally, the optimal method of thermal hydrolysis will be proposed in relation to different aspects of digested sludge quality.

Process modeling of sugarhouse with bioethanol and biogas production

Department: Department of Carbohydrates and Cereals, Faculty of Food and Biochemical Technology

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The operation of the modern sugar factory is based on the production of white sugar and of other products such as bioethanol, biogas, green syrup or molasses, dried beet pulp and fertilizers. It is a combination of classical sugar production starting with extraction, epuration, evaporation and refinery, as well as related processes such as fermentation, distillation or separation using ion exchangers and molecular sieves. All these processes are interconnected into a global process unit aimed at minimizing the consumption of energy, fuels and solvents. The work will be focused on creating a modular process diagram describing the entire sugar production with related processes. The aim is to create a static or dynamic model based on mass and energy balances using existing software environment (AspenTech, Sugars, Matlab) or own developed computing environment.

Product Life Cycle Cost Analysis

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

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The doctoral thesis assesses product value from the perspective of its whole life cycle, considering its setting in production, trade, regulatory and utility systems. Particular attention is given to the dynamics of these systems and to the optimization process in capital budgeting .

Production of antibacterial peptides from marine organisms and evaluation of their biological activity

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Tomáš Ruml, CSc.

Annotation

Design of bacterial expression system for production of existing antibacterial peptides identified in the laboratory of prof. Stensvåg at University in Tromso. Firstly, it is necessary to overcome the toxicity issues either by fusion with bulky protein or secretion achieved by fusion of the peptides to export sequence. Next step is upscale to massive production and purification for functional studies (pull down assay with bacterial cell lysate). Isolated products will be used for analysis of biological activity targeted against bacterial and yeast cells, including biofilms and determination of immunomodulatory effects. Subsequently it is planned a study of mechanisms leading to inhibition.

Production of antibacterial peptides from marine organisms and evaluation of their biological activity

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Tomáš Ruml, CSc.

Annotation

Design of bacterial expression system for production of existing antibacterial peptides identified in the laboratory of prof. Stensvåg at University in Tromso. Firstly, it is necessary to overcome the toxicity issues either by fusion with bulky protein or secretion achieved by fusion of the peptides to export sequence. Next step is upscale to massive production and purification for functional studies (pull down assay with bacterial cell lysate). Isolated products will be used for analysis of biological activity targeted against bacterial and yeast cells, including biofilms and determination of immunomodulatory effects. Subsequently it is planned a study of mechanisms leading to inhibition.

Profile characterization and authentication of food products using direct spectral methods

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Dr. Ing. Jan Poustka

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The dissertation is focused on the application of selected direct spectral methods such as infrared spectrometry (ATR-FTIR) and/or mass spectrometry (DART-MS) in order to deepen the possibility of the rapid characterization and authentication of different food products. The aim of the work is to develop analytical procedures suitable for characterization of various materials so that they can be used for the authentication or differentiation, eg. by origin or degree of technological processing. In addition to the applied analytical methods, advanced statistical methods, including multivariate data analysis, will be used for data processing, which allows sorting into characteristic groups.

Programovatelné uvolňování léčiv z vícejednotkových lékových forem

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

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Multi-unit pellet systems (MUPS) are dosage forms composed of smaller sub-units, typically pellets or mini-tablets, combined into a single larger tablet or capsule. Traditionally, the sub-units are all identical. However, by mixing sub-units of different properties such as particle size, disintegration rate, composition, or coating thickness, it is theoretically possible to fine-tune the drug release from the MUPS almost arbitrarily. The aim of this project is to explore the possibility to achieve precise control over drug release from MUPS by programmed mixing of different grades of sub-units. The project will involve the formulation of individual sub-units for a selected set of drugs, their production by fluid-bed coating or multi-tip tablet compression, their individual characterization and finally their controlled combination into MUPS with a pre-defined release profile. The project will suit a person with a background in pharmaceutical sciences or chemical engineering.

Properties and structure of rapidly solidified aluminium alloys with natural alloys

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology

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Rapidly solidified aluminium alloys with transition metals have excellent mechanical properties and elevated thermal stability when compared to conventional alloys. In this work, the alloys prepared by alloying aluminium by different amount of natural alloys obtained by reduction of polymetallic ore will be studied. Structures, mechanical properties and elevated temperature behaviour of these materials will be described. Study of these materials and their properties will enable the design of technology to obtain materials with the required properties from natural sources.

Protective compounds arising de novo during food processing

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Dr. Ing. Karel Cejpek

Annotation

The subjects are physiologically and/or technologically desirable substances formed by complex non-enzymatic browning reactions during processing of food. The work will focus on the products that contribute to the increase of redox stability and the decrease of reactive carbonyl compounds, both in foods and human body. The goal will be assessing optimum conditions for the formation of these substances in processed foods and finding how the addition of suitable precursors into foods affects the formation of the desired functional foods.

Pulsed laser deposition and surface modification by high energy excimer beam

Department: Department of Solid State Engineering, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Petr Slepička, Ph.D.

Annotation

Preparation of laser deposited/exposed special materials (biopolymers, metals, special carbon materials) in order to prepare homogeneously nanostructured surfaces. Optimization of deposition / exposure time to prepare structures with unique physicochemical properties or "new types" of structures (graphene, Q-carbon). Specific polymer composites (carbon nanowires and nanotubes in polymer) will also be prepared and their response to high energy laser excimer beam exposure will be monitored. Changes in surface properties of bulk modified materials, especially changes in conductivity, surface morphology, roughness and surface chemistry will be studied. The modification will be carried out with the aim of precise control of the types of prepared structures (dot, line, wrinkled nanopattern). Interdisciplinary character of the work - possible applications in chemistry, electronics and biocompatibility studies (tissue engineering).

Quorum quenching strategies to suppress virulence of pathogenic microorganisms

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie
Theses supervisor: prof. Ing. Jan Masák, CSc.

Annotation

Microorganisms use various regulatory mechanisms to control gene expression and phenotype formation. One of them is quorum sensing responding to fluctuations in cell population density. Mostly simple compounds, so-called signaling molecules, are involved in this type of regulation. Quorum sensing is often associated with the production of various virulence factors in both prokaryotic and eukaryotic microorganisms. The term quorum quenching is called a strategy to suppress quorum sensing and hence the virulence of many pathogens. The aim of this thesis is to find, deeper understanding and practical application of effective quorum quenching strategies for reducing or eliminating virulence, especially of pathogenic strains Pseudomonas aeruginosa and Candida albicans. The main attention will be paid to specific enzymes disrupting signal molecules, to substances interfering with these molecules and to participation of various type of nanoparticles.

Radiation resistant polymers for dosimetry and space applications

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Jiří Pánek, Ph.D.

Annotation

The aim of the project is the preparation and testing of radiation-resistant organic polymers usable in water or cosmic environment. The key property of polymers resistant to ionizing and UV radiation is their ability to eliminate free radicals which are created by interactions of radiation with chemical substances. Degradation effects caused by free radicals are usually reduced by addition of low-molecular antidegradants physically admixed into the polymer matrix. The objective of the dissertation is an improvement of polymer matrixes with polymer antidegradants bearing functional groups on macromolecular chains, which enhances their ability to remain in the matrix and protect the polymer for long time (in water or vacuum). The work will be focused on preparation and testing of the stabilized polymer materials by physicochemical methods and examining possibilities of their practical use. The topic will be investigated in collaboration with an industrial partner aiming at: 1) production of polymer protective packaging for a new type of clinical dosimeters for measurement; 2) development of polymer materials with sustained light transmittance stability that can be used as external protection of photovoltaic panels on satellite systems.

Rate-based model of multi-component distillation. Experimental verification.

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: doc.Ing. František Rejl, Ph.D.

Reaction-transport processes in ion-exchange systems

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: doc. Ing. Zdeněk Slouka, Ph.D.

Reactivity of chloropropanediol and glycidol esters in foods

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Dr. Ing. Marek Doležal

Annotation

The discovery of ester-bound 3-chloropropane-1,2-diol (3-MCPD), 2-chloropropane-1,3-diol (2-MCPD) and glycidol in refined edible oils and other foods has initiated their monitoring in many European Union countries. The work will be focused on the study of yet insufficiently investigated reaction mechanisms leading to the formation and degradation of these compounds. Study will take place in model systems as well as in food. Knowledge of mechanisms, products and reaction kinetics of formation and decomposition under various conditions (water activity, pH, temperature) can help to predict concentrations of these process contaminants in real matrices and help to find suitable detoxification processes.

Regeneration of CO2 using renewable energy sources

Department: Department of Solid State Engineering, Faculty of Chemical Technology

Regulation of focal adhesion dynamics by calpain-2 mediated proteolysis of focal adhesion protein paxillin

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: RNDr. Pavel Branny, CSc.

Annotation

Calpain proteases are intracellular cysteine proteases that by limited proteolysis regulate a wide spectrum of physiological processes ranging from muscle development to long-term potentiation of neurons to cell cycle. Calpains are also involved in the regulation of cell migration as they affect the stability of focal adhesions, multiprotein assemblies that mediate cell adhesion to extracellular matrix. To control migration, calpains cleave components of adhesions accelerating their turnover and thereby promoting cell migration. Consistent with these findings, we observe that activation of calpain 2 results in cleavage of focal adhesion protein paxillin at previously uncharacterized site. The project focuses on characterization of paxillin as a substrate of calpain 2 and how paxillin cleavage affects the dynamics of adhesions and cell migration. The work will include isolation of the cleaved form of paxillin from mammalian cells and determination of the cleavage site followed by overexpression of the mutated paxillin or insertion of mutation into the genome using CRISPR/Cas9 system. The effect of such prepared non-cleavable form of paxillin on the focal adhesions dynamics and migration will be studied by life cell and fluorescence microscopy, including superresolution techniques.

Regulation of redox signaling in immune cells by natural compounds

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: Ing. Jaroslav Zelenka, Ph.D.

Annotation

Inadequate or inappropriately targeted immune response is the cause of many chronic diseases, from allergies to diabetes mellitus to cancer. The complexity of the human immune system is close to the nervous system and its proper function is dependent on precisely regulated extracellular and intracellular signaling. Its important component is redox signaling, which can be influenced by low concentrations of molecules acting as antioxidants or prooxidants. Numerous common natural compounds recruiting from the plant and microbial metabolites have the potential to influence the redox signaling of immune cells even at concentrations commonly found in our digestive tract, and the intestinal immune system is crucial for the immune response of the whole organism. The aim of this thesis is to evaluate the influence of fungal toxins, antibiotics and organic acids on selected parameters of immune response in immune cell models.

Relationship between plants endophytes, and its metabolome

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Study programme: Mikrobiologie
Theses supervisor: doc. Ing. Petra Lovecká, Ph.D.

Annotation

Recently, research focused on uncommon natural sources and unexplored habitats has become a subject of deep scientific interest. Exclusive relationships of endophytic bacteria and fungi with plants were shown to have a great potential to produce new and rare secondary metabolites, with unique health beneficial, technological and nutritional properties. The essence of the thesis will be studying of mutual relationships between microbial endophytes and Vitis vinifera L. plants grown under conditions of conventional vs, organic farming systems, by advanced tools of modern analytical chemistry – high resolution mass spectrometry-based metabolomic fingerprinting / profiling. In addition to this, potential ofendophytes to prevent pathogenic fungi growth and mycotoxins production will be assessed.

Removal of Organic Compounds from Water Using Membrane Processes

Department: Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology
Theses supervisor: prof. Ing. Václav Janda, CSc.

Annotation

The aim of the work will be testing of organic and inorganic membranes for the removal of organic pollutants from water. The membranes of different porosity and their suitability for the removal of various types of pollution will be tested. Removability of the contamination will be evaluated for the different types of membranes depending on the size of the macromolecules. The membrane fouling and the possibility of their regeneration in various ways, including regeneration by chemical agents, will be tested. The results should be particularly applicable in the drinking water area.

Removal of emerging pollutants to allow wastewater reuse

Department: Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology
Theses supervisor: doc. Ing. Jan Bartáček, Ph.D.

Annotation

Emerging pollutants such as farmaceuticals, personal care products or hormones became an important factor jeopardizing the reuse of treated wastewater originating from various sources, i.e. effluents from urban wastewater treatment plants, treated grey water etc. As water recovery technologies are often based on membrane bioreactors (MBR), it would be beneficial to upgrade these MBRs to remove persistent organic pollutants besides other pollution. In this project, we aim to develop technology for micropollutants removal in small scale, so that it mey be applied e.g. for decentralized recycling of grey water.

Removal of heavy metal ions from water using graphene oxide precursors

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Theses supervisor: doc. Ing. Karel Friess, Ph.D.

Annotation

The presence of heavy metal ions in water is a serious problem for human health and the environment. The ability to efficiently and easily remove unwanted cations from water by adsorption without the need for the use of non-organic agents poses a global challenge to scientists in the art. There will be studied the possibility of using newly prepared adsorption materials based on carbon materials (doped and modified graphene derivatives). Besides preparation, characterization and testing of material properties and adsorbent efficiency for effective removal of contaminants from water, the work will also include development of methodology for post-process separation of adsorbent from purified water. The result of the work will be in addition to the preparation of effective adsorption material and the extension of knowledge in the given material and process field.

Removal of metal cations from aqueous solutions by special sorbents

Department: Department of Power Engineering, Faculty of Environmental Technology
Study programme: Energie a paliva
Theses supervisor: doc. Dr. Ing. Helena Parschová

Research and optimization of components of the PEM type fuel cell stack

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: prof. Dr. Ing. Karel Bouzek

Annotation

With a rapid development of advanced catalysts and construction materials an important question arises. It concerns impact of these parameters on fuel cells operational parameters for various construction arrangements. The target of this study is to optimise construction and materials of the bipolar plates for fuel cells stacks. Two different types of catalysts will be used. The results obtained will be tested by means of laboratory scale fuel cell stack of size of hundreds of watts. Applicability of the product in a small mobile unit powered by the stack will be tested.

Robotická linka pro kontinuální výrobu personalizovaných formulací

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

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Currently, approximately 10 % of the whole population and 30 % of adults aged 65+ take five or more different prescription medications each day. Low prescription compliance due to the complexity of the prescription regime is a major problem, responsible for an estimated 125,000 deaths per year and 10 % of all hospitalizations in the USA alone. Therefore, it would be beneficial if each patient could take only 1 pill per day that would contain the required drug combination while being bioequivalent with the single-drug dosage forms. The aim of this project is to design and assemble an automatic manufacturing line that would enable the production of patient-specific batches based on their electronic prescription for a given period of time, e.g. 30 days. The line will be based on the well-established process of pharmaceutical compounding. However, instead of manual compounding by a live person, this process will be autonomous and rely on robotics. The project will involve the selection and validation of individual compounding sub-stations and their connection to a fully automatic bench-scale manufacturing line. This project would best suit a person with a background in engineering (chemical, mechanical, electrical).

Role of Inhibitory Factor IF1 in the regulation of pancreatic ?-cell metabolism and mitochondrial morphology

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: Ing. Andrea Dlasková, Ph.D.

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A unique function of pancreatic ?-cells is insulin secretion and consequently also maintenance of glucose homeostasis. Several factors ensure precise coupling of glucose levels, pancreatic ?-cells metabolism and insulin secretion. ATP is recognized as a key regulator of insulin secretion. Studies addressing intrinsic regulators of ATP synthase in pancreatic beta cells are thus of paramount importance and have a high potential of identifying new T2DM (Type 2 Diabetes Mellitus) therapeutical targets. Surprisingly, nearly no studies are available in this research field. Recently, we reported on the presence of ATPase inhibitory factor 1 (IF1) in pancreatic ?-cells and its role in downregulation of cellular ATP levels and insulin secretion. However, the exact mechanism by which IF1 regulates ATP synthesis remains controversial and further studies are essential.The aim of this PhD project is to study the mechanism by which IF1 regulates ATP levels in pancreatic ?-cells and to identify post-translational modification of IF1 in response to glucose availability. Selected PhD student will also analyze how IF1 regulates insulin secretion in vivo by use of IF1-knockout mouse model. To study changes in mitochondrial morphology newest super-resolution microscopy techniques and 3D electron microscopy techniques will be applied.

Rubber co-vulcanization

Department: Department of Polymers, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: doc. Ing. Antonín Kuta, CSc.

Annotation

Rubber materials are often based on two or more rubbers. Resulting properties of those vulcanizates depend on both the degree of rubber mixing and crosslink distribution. The thesis will evaluate vulcanizates properties in point of view of material morphology with the focus on sulphur and zinc distribution

Safety Assessment of Food Packaging Materials

Department: Department of Food Preservation, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Ing. Aleš Rajchl, Ph.D.

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Health safety of packaging materials is currently one of the most important aspects for assessing their suitability for food contact. The study will be focussed on identification, quantification and evaluation of migration of selected contaminants from food packaging material. The work will include the development of novel analytical methods for the determination of selected contaminants and evaluation of their health safety.

Secondary metabolites of microalgae and plant cells and their effect on skin microbiome

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie

Selective polymer therapeutics for eradication of cancer stem cells and monitoring therapeutic efficacy using exosomes

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Olga Janoušková, Ph.D.

Annotation

Polymeric drug carriers allow targeting of drugs to the target site, and also minimize the side effects of therapy. Tumor stem cells (TSC) remain resistant to conventional and also polymeric drugs therapy and are often at the origin of metastasis. Tumor eradication and targeted TSC is one of the unresolved topics of tumor therapy. Exosomes have been extensively studied to monitor the modulation of the body's response to antitumor therapy and the development of metastases. Vesicles derived from the plasma membrane of cells are important indicators of physiological and pathological processes and at the same time they can transport drugs. The aim of the project will be preparation of polymer therapeutics, selection of TSC and study of cellular response to interaction with polymer carriers and drugs, resp. intercellular communication via microparticles and exosomes, their characterization and modulation of their formation depending on the type of carrier and drug. The proposed topic concerns the overlap of the fields of biochemistry, macromolecular chemistry and molecular biology, which is currently very current with regard to the necessary interconnection of disciplines leading to more effective drug development and therapeutic approaches. In addition to the basic techniques necessary for the preparation of macromolecules, the student will learn basic methods of cell and molecular biology.

Self-assembled multiresponsive polymer systems for biomedical use

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: RNDr. Petr Štěpánek, DrSc.

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Self-assembly of (macro)molecules is of crucial importance in the architecture of living organisms. Supramolecular systems have their key properties critically dependent on self-assembly and find use in the area of biomedical applications especially if they are able to reversibly react to external stimuli (changes in pH, light, redox potential, ultrasound, temperature, concentration of certain substances). The doctoral thesis will be based on chemical and/or physicochemical preparation and study of self-assembly of such multi-stimuli-responsive nanoparticles with external environment (pH, redox potential and temperature responsiveness); the exact topic will take into account the student´s interests. The studied nanoparticles will be designed for diagnostics and personalized therapy of cancer and infectious diseases. Optimized nanoparticles will be then provided to collaborating biological workplaces for in vivo testing. If the student is interested in, it is possible to make part of the study at collaborating workplace in France within the program “double degree PhD”, the deadline is February 14, 2020 (see https://studium.ifp.cz/cz/doktorandi/barrande-fellowship-program/ ). If you are interested in this option, please contact the supervisor as soon as possible.

Self-cleaning and antibacterial coating based on TiO2 and ZnO

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: prof. Dr. Ing. Josef Krýsa

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The main scope of this work is preparation of photocatalytic active coatings/ paints based on TiO2 a ZnO on the appropriate substrate (ceramics, glass, metals, facades, hydraulic binders) by different methods. The important part of the work is films characterization (XRD, SEM, Raman spectroscopy) and development of methods for testing photoactivity and hydrophilic and antibacterial properties of prepared layers. Studied parameters will be the methods of precursor deposition (dip-coating, spraying) and the influence of the binder in the coating and the substrate.

Self-cleaning anti-biofilm polymer surfaces

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Martin Hrubý, Ph.D., DSc.

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The formation of bacterial biofilms is a one of the major issues in the current biomedical research. In the body, such biofilms are created on the surface of the medical devices, e.g., joint prostheses or heart valves, where they cause inflammation and chronic infections. The aim of this Ph.D. project is to develop a novel class of smart self-cleaning anti-biofilm polymer surfaces, based on poly(2-alkyl-2-oxazoline)s, that are both anti-fouling and able to catalytically prevent the biofilm formation in the very long-term period. The project work includes polymer synthesis, the surfaces preparation and the study of their physicochemical properties. Moreover, the selected surfaces will be subjected to comprehensive in vitro and in vivo testing in the collaboration with biologists.

Separation of racemic mixtures by membrane processes

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: Ing. Pavel Izák, Ph.D. DSc.

Annotation

The aim of the doctoral thesis is the separation of racemic mixtures by membrane separation processes. The racemic mixtures contain the same amount of L and D enantiomers. The individual enantiomers have the same physicochemical properties in the achiral environment and therefore it is very difficult to separate them. However, in the human body, the L and D enantiomers have different effects and the D enantiomers may be detrimental to health. Ph.D. work will focus on the development of new membranes and separation techniques for the selective separation of enantiomers from racemic mixtures with practical applications, especially in the pharmaceutical, food or agrochemical industries.
The doctoral candidate will be required to work out a detailed search of international literature on the subject (need for active English knowledge), independent measurement and results processing, and in co-operation with the supervisor writing publications to international journals.

Silicate glass surface and its characterisation

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

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Glass surface is still not fully explored but its character is directly related to mechanical and chemical properties of the glass artefacts. The work covers creation of glass surface and its characterisation by means of accessible microscopic and spectroscopic methods (SEM, IM, EPMA, Raman, TOF-SIMS, XPS) on different level of surface sensitivity.

Smart antimicrobial materials

Department: Department of Solid State Engineering, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials

Solubility of gases in non-volatile liquid media

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie
Theses supervisor: doc. Ing. Karel Řehák, CSc.

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Knowledge of the gas solubility in non-volatile liquid media is important in various application spheres. These may be the solubility of carbon dioxide or methane in aqueous salt solutions, which are important for geological storage of carbon, oil extraction or desalination of seawater. It may also be the solubility of nitrogen and air in the electrolyte solutions that are considered in the construction of batteries. Experimental determination of gas solubility usually does not cover a wide range of possible conditions - temperatures, pressures and composition, so it is advisable to have suitable calculation tools to predict or extrapolate data with reasonable accuracy. The subject of this work is experimental determination of solubility of gases in non-volatile solvents (e.g. in ionic liquids) or in electrolyte solutions and study of possibilities of relevant thermodynamic description and prediction.

Solvent and pH stable membranes with ultra-sharp molecular weight cut-off values

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: doc. Ing. Zdeněk Slouka, Ph.D.

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Membrane-based separations currently offer the best strategy to decrease energy requirements and environmental footprint through newly developed solvent resistant nanofiltration (SRNF) or solvent-tolerant nanofiltration (STNF). So-called solvent activation of polymeric membranes involves treatment of an existing membrane by contacting it with solvents or solvent mixtures, which is hypothesized to restructure the membrane polymer through solvatation, increase polymer chain flexibility and organization into suitable structures. This will be verified by systematically treating membranes with different solvents and testing them for the separation of synthetic liquid streams. A high-throughput set-up will be used. Fundamental physico-chemical characterisations of the membranes before and after the treatments will provide insight in the changes at molecular level. The characterization techniques include gas and liquid uptake experiments (diffusivity), PALS (positron annihilation lifetime spectroscopy, to determine free volume element distributions), ERD (elastic recoil scattering, providing elemental analysis in membrane depth profiles), solid state NMR (nuclear magnetic resonance), TGA (thermogravimetric analysis) and DSC (differential scanning calorimetry).

Solvent and pH stable membranes with ultra-sharp molecular weight cut-off values for nanofiltration and pervaporation

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Theses supervisor: doc. Ing. Karel Friess, Ph.D.

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Current membrane separation processes allow efficient purification of polar or non-polar solvents from undesirable components on the basis of a size-sieving (pressure-driven methods) or chemical affinity (solution-diffusion mechanism). The thesis will focus on testing of robust, pH stable membrane materials with targeted separation properties for specific membrane operations. In addition to the preparation, characterization, and testing of materials, the work will also include modelling of the separation process. The result of this work will be, besides the preparation of an effective separation material and describing the model, an extension of knowledge in the given membrane field.

Special glasses

Department: Laboratory of Inorganic Materials, Faculty of Chemical Technology
Theses supervisor: Ing. Petr Kostka, Ph.D.

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The work will focus on the preparation and study of new glasses containing heavy metal compounds, especially heavy metal oxides. Heavy metal oxide glasses in which the glass network is formed by oxides such as e.g. TeO2, GeO2 or Sb2O3 instead of SiO2 are studied for their characteristic properties. In comparison to conventional glasses they particularly excel with their wide transparency interval reaching to much longer wavelengths than in silicate glasses, higher refractive index, and non-linear optical properties. They are also interesting because of the high quantum yield of radiative transitions of rare earth ions embedded in their glass networks, which have low phonon energies, and because of their ability to adopt high concentrations of rare earths ions. The characterization of the prepared materials will include determination of their basic physicochemical properties such as density, molar volume, thermal stability, chemical resistance, hardness, optical transparency, refractive index etc. The correlation between the structural units of the glass network and resulting properties will be investigated and the influence of technological conditions during glass preparation on glass properties will be studied. The Laboratory cooperates with foreign research institutions.

Speciation analysis of selenium in microorganisms used in food industry

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie
Theses supervisor: prof. Ing. Oto Mestek, CSc.

Specific mechanisms of structural materials damage in nuclear power plant conditions

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology

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The structural materials of nuclear power plants are resistant in correct environments due to their passivity or due to surface protection by high temperature oxide. The occurrence of localized defects is caused by local damage of the one of protective barriers, which usually occurs by local changing of the environment or by the creation of specific material heterogeneities, eg in weld joints. The work will be devoted to the evaluation of the influence of material heterogeneities and environmental conditions especially in the secondary circuit of power plants on the initiation and development of localized damages.

Spectroscopic Studies of Protein Fibrils

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programmes: Chemie, Chemistry
Theses supervisor: prof. RNDr. Petr Bouř, CSc.

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Many biological processes involve aggregation of proteins into insoluble aggregates, "fibrils". Their properties are studied, for example, to prevent neurodegenerative diseases limiting human live time. We use optical spectroscopic, computational and other methods to understand basic principles of fibril behavior and structure. Particular aim of the thesis is to develop measurement and interpretation procedures for the modern spectroscopy of Raman optical activity, the topic involves spectroscopic experiments as well as computational modeling.

Spectroscopic studies of sugar-lectin interactions

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie
Theses supervisor: prof. RNDr. Petr Bouř, CSc.

Annotation

Lectins are carbohydrate-binding proteins that control various functions in living organisms including the cell-cell interaction, inflammatory and immune response, fertilization, adhesion and virulence of pathogens. Particularly galectins (defined by their binding specificity for galactosides) are in the center of many research studies as immune checkpoints in pathogenesis, or tumor progression and metastasis. The ability to design new galectin inhibitors that would suppress these negative processes envisages not only understanding the carbohydrate-lectin structure but also requires knowing the conformational behavior of the inhibitor in an unbound state. In the thesis, we propose to prepare carbohydrate conjugates bearing metal tags that allow us to measure paramagnetic NMR pseudo-contact shifts (PCS) and circularly polarized luminescence (CPL) sensitive to the conformation and to close environment. The interpretation of the experiment is not straightforward and theoretically based predictions will be developed, to understand the spectral parameters.

Stability of soil ternary complexes with toxic oxyanion (As/Sb/Se). Effect of iron and organic carbon.

Department: Department of Solid State Chemistry, Faculty of Chemical Technology

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In soil profiles several toxic elements (arsenic, antimony, selenium) occur as oxyanions primarily bound to HFO phases, forming stable surface complexes. This process runs as the balanced adsorption of oxyanions from a soil solution to active adsorption sites of soil particles, in the presence of another anions and dissolved organic matter. During this process the binary and/or ternary soil complexes of HFO, organic matter and oxyanion have been formed. The adsorption and complexation proceed in a colloid environment, which is susceptible to the ionic strength of soil solution (stabilization or aggregation of particles). According to recent results the stability of formed ternary complexes is critical for the long-term stability of binding oxyanions. The aim of this work will be to qualify the formation of organic matter – ferric oxide – anionic particle ternary komplexes, to describe their structure and binding properties, and to estimate the environmental impact to the stability of complex components, particularly the toxic oxyanionic forms.

Stabilization and controlled release of a drug by coating of drug particles with polymers

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

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Current active pharmaceutical ingredients (API) commonly have very low bioavailability, which is in most cases caused by their low water solubility. One of the possibility to improve this situation is to prepare metastable polymorphic forms, which are having intrinsically higher water solubility. However, this often results in their low chemical or physical stability, which limits their application. The main goal of this project is to investigate the possibility to coat surface of metastable API particles by suitable polymeric compound to generate protective layer. In addition, such layer might also provide other functionality, which is controlled release of API during dissolution. Therefore, student will be involved in the testing of various methods to coat API particles by various polymers. As promising method is milling as this method is commonly used for preparation of metastable forms of APIs followed by attachment of the polymer on the surface of metastable forms of API. Small-scale apparatus will be used to test various operating conditions as well as combination of API and various polymers. Prepared API particles coated with polymer will be consequently characterized by several techniques including SEM, XRD, DSC etc., combined with the measurement of API dissolution kinetics. Here time evolution of the API concentration in the used media together with size and morphology of particles will be followed by UV/VIS and Raman spectroscopy (both API concentration), FBRM (particle size) and optical video microscopy (particle size and shape). In the last stage of the project student will be responsible for the scale up of this process to illustrate possibility to prepare larger amount of coated API particles. Simulated impact of normal and tangential forces similar to those occurring during formulation, i.e. granulation and tableting, will provide information about the mechanical robustness of developed coating.

Starch nanoparticles – preparation and uses

Department: Department of Carbohydrates and Cereals, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Ing. Evžen Šárka, CSc.

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Starch-based nanoparticles, which are extensively investigated nowadays, may be used as fillers and reinforcing agents in polymer composites, carriers for drug delivery, barrier coating materials, and stabilizers in oil-in-water emulsions. The addition of starch nanocrystals from different botanical origin to biodegradable films of waxy starch has improved barrier and mechanical properties of the resulting materials. The thesis is focused on the preparation of starch nanoparticles and their potential applications.

Strategies for the assessment of human exposure to various chemicals from the environment

Department: Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology

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In line with the current trends and requirements, the thesis will be focused on implementation of new, rapid procedures for trace analysis of various organic contaminants including their metabolites. Both gas chromatography and liquid chromatography coupled with various types of mass spectrometry will be implemented for this purpose. Approaches suitable both for target analysis and non-target screening will be optimised and their performance critically assessed. New analytical procedures will be finally applied in human biomonitoring studies.

Strength and fluidity of granular media

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

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Mechanics of granular media (sand, clay, silt, debris, etc.) is central to many problems in geology and technology. Natural hazards such as earthquakes or landslides are triggered by mechanical instability of embedded granular gauges. On the other hand, conditions leading to good fluidity of granular media are often sought in civil engineering, pharmacy, and chemical technology. Therefore, understanding of mechanisms controlling the strength of granular media is of high importance. The student will run computer simulations of a shearing granular layer and will study conditions leading to flow. The resulting theoretical picture should enlighten mechanisms that are most effective in degrading mechanical strength. In particular, the effect of pore fluid and oscillations of boundaries will be studied in detail.

Structural, Magnetic and Thermoelectric Properties of TM in ZnO / ZnS: Effects of Nano-sizing

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: Ing. Ladislav Nádherný, Ph.D.

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In the past ten years, the interest in zinc oxide research in the field of magnetic semiconductors has significantly increased. According to the Zener model, manganese-doped ZnO is one of the systems in which ferromagnetic behavior could be achieved even at room temperature. Since the solubility of magnetic Mn in bulk ZnO is very limited, new approaches to prepare thin films and nanoparticles with higher dopant concentration are used. The aim of this dissertation thesis is to prepare nanopowders based on ZnO with the highest concentration of Mn as possible. Prepared powders will be characterized by means of XRD, TEM, DSC, DLS, PPMS, and the nanosizing effect on the Mn solubility in ZnO or ZnS will be described.

Structure and dynamics of glutamate receptors, theory and experiment.

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: Ing. Jiří Černý, Ph.D.

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The proposed multidisciplinary project combines various experimental and theoretical strategies to refine structural elements of the glutamate receptor (iGluR) in functionally important states. We will extend the available structural data using a mammalian and insect cells expressed iGluRs. We will induce and characterize its functional state (activation kinetics, binding affinity, and single channel properties). Further, we will use the distance information from a structural mass spectrometry analysis as an input into all-atom adaptive enhanced sampling MD simulations to refine the original crystal structures and identify new structural motifs. We will gain highly accurate structural information on iGluR in its functionally important states and their role in iGluR structural transitions.

Structure and function of bacterial transcription system

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: Ing. Jan Dohnálek, Ph.D.

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The bacterial transcription system is currently a focus of numerous research projects as an antibiotic target as well as posing a number of unanswered basic questions. We concentrate on analysis of structure and function of RNA polymerase from gram-positive bacteria, namely Mycobacterium smegmatis and Bacillus subtilis. We investigate the role of either recently discovered or not fully understood protein factors involved in the transcription machinery. Mycobacteria are medically important organisms containing serious pathogens. Bacillus subtilis is a representative organism of gram-positive bacteria, with some differences in transcription in comparison to mycobacteria. In this project selected RNA polymerase-associated proteins will be characterized in detail as for their structure and function, using techniques of molecular biology and integrative structural biology, including X-ray crystallography, small angle X-ray scattering and cryo-electron microscopy.

Structure and function of proteins transporting alkali metal cations

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: RNDr. Hana Sychrová, DrSc.

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The aim of the PhD thesis is to characterize, with the use of molecular biology and biochemistry methods, amino-acid residues involved in the regulation of activity, substrate specificity and tertiary structure of alkali-metal-cation transporters. These transporters have very prominent function in the cell physiology of all organisms; and the knowledge of their structure and function is very important for a broad spectrum of areas, from medicine and pharmacology to biotechnology.

Structure and optical activity characterization of organometallic complexes with the aid of quantum chemistry

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Theses supervisor: prof. RNDr. Petr Bouř, CSc.

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Organometallic complexes often exhibit unique optical properties, used in bioimaging and detection of other molecules in analytical chemistry. Lately, several new phenomena appeared when using polarized spectroscopy, such as circular polarized luminescence or resonance Raman optical activity, potentially leading to further applications. So far, there theoretical description is incomplete. On model systems we will therefore investigate how contemporary methods of quantum chemistry can describe polarization phenomena on these computationally difficult (relativity, high spin) but interesting systems.

Structure and reactions of solvated electron

Department: Department of Physical Chemistry, Faculty of Chemical Engineering

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Solvated electron is an interesting redox species. Hydrated electron, i.e. the electron solvated in water, is a short living transient species (picosecond lifetime). It turns out that the solvated and presolvated electron play a major role in radiation damage of biomolecules and in atmospheric chemistry. The subject of the proposed Thesis is the interaction of high energy radiation and the research of solvated electron fomration and reactivity. For more information, see http://photox.vscht.cz/

Structure-Function Relationships of the Bordetella Type III Secretion System Proteins

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Study programmes: Mikrobiologie, Microbiology
Theses supervisor: prof. Ing. Peter Šebo, CSc.

Annotation

Type III secretion systems are membrane-embedded nanomachines used by many Gram-negative pathogens to inject bacterial effector proteins into the cytosol of eukaryotic cells. The aim of this thesis is to depict structure-function relationships of proteins of Bordetella III injectosome and its secreted substrates. Specifically, BopN protein that exhibits homology to the class of “gatekeepers” or “plug” proteins, Bsp22 protein that forms a unique filamentous T3SS tip complex and BteA effector protein with unknown mechanism of action. The PhD. candidate will develop reporter assays to analyze activity of Bordetella type III secretion system, perform super-resolution and cryo-electron microscopy and further carry out structural characterization and crystallization trials of the purified recombinant proteins, their domains and/or their mutated variants.

Structure-function relationships in selected α-L-rhamnosyl-β-D-glucosidases

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: Dr. Michael Kotík, Ph.D.

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α-L-Rhamnosyl-β-D-glucosidases (rutinosidases) are not well-known microbial glycosidases that react with rutinosides such as rutin and hesperidin but also often with selected glucosides (e.g. isoquercitrin). These compounds which contain a flavonoid-based aglycone and a saccharidic moiety composed of rutinose or glucose have interesting biological properties for potential applications in food technology and medicine. In the framework of this project, we will investigate the relationships between the structure, function and promiscuity of four α-L-rhamnosyl-β-D-glucosidases by site-directed mutagenesis directed towards the aglycone binding site of the glycosidic substrates and towards a loop region that partially covers the active site of these enzymes. An important basis of our investigations is the recently determined crystal structure of a rutinosidase. In silico molecular docking of enzymatic substrates and products will be another task. Further aims of the project are: determine the quaternary and three-dimensional structures of the first rutinosidase within the GH3 family, obtain the structures of the enzyme–substrate complexes, determine the substrate specificities, and perform a structural analysis of the products generated in the synthetic reaction mode of these enzymes.

Structured materials for heterogeneous catalysis

Department: Department of Solid State Chemistry, Faculty of Chemical Technology

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The work is focused on preparation of catalytically active mixed oxides of transition metals deposited on preformed metal and ceramic supports. Modification of supports surface, coating with oxide interlayers for active components anchoring, and subsequent deposition of the catalytically active oxides will be studied. The aim of the work is to obtain a complex information about the role of supports surface pretreatment, procedure of precursors deposition, and following thermal treatment on the composition, physical chemical properties, and catalytic activity of the supported catalysts.

Studies of new forms of vibrational optical activity

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie
Theses supervisor: prof. RNDr. Petr Bouř, CSc.

Annotation

Analytical methods of molecular optical activity provide unique information about molecules in solution. However, interpretation of some experiments is a challenging process involving many aspects of molecular dynamics, physics and quantum chemistry. We will focus on new phenomena, such as enhanced vibrational circular dichroism, Resonance Raman optical activity and anharmonic vibrational bands.

Study of binary effects in process of particulate solid mixtures compaction

Department: Department of Organic Technology, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials

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The topic is aimed at studying the structure effects of two or more component mixtures on the mixture behavior in compaction and tablet compression processes. The study will involve pairs of particulate materials, relevant for unit operations in solid dosage form production, such as filler-glidant, filler-lubricant, filler-binder, or interactive mixtures of carrier-API. The compaction characteristics of the mixtures will be studied using a compaction analyser and evaluated in relation to properties of the mixture and its structure. The results should be further employed to develop co-processed excipient mixtures for a general application in direct tablet compression blends.

Study of bubble and drop interactions with a turbulent vortex

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: Ing. Jaroslav Tihon, CSc.

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Gas-liquid or liquid-liquid dispersions are encountered in numerous technological and biotechnological processes. The fluid particles (bubbles or droplets) break in the turbulent liquid flow and form a complex multiphase system. Understanding the particle breakup mechanism at turbulent flow conditions is important because theoretical models describing this mechanism are essential for the numerical modeling of complex multiphase systems. The postgraduate project will be focused on the experimental study of dynamic behavior of bubbles and drops after their interaction with a turbulent vortex in order to determine the breakup rate of original particles and the size distribution of newly formed particles. The breakage mechanism will be studied in dependence on various hydrodynamic and physico-chemical conditions of the studied system. Department is well equipped for the study of bubble/drop breakup in turbulent flow. Cells for controlled generation of bubble, toroidal vortices and intense turbulent flow are available, as well as all the control and evaluation software. Requirements for the applicant: master degree in chemical or mechanical engineering; ability to teamwork; systematic and creative approach to scientific problems; interest in experimental work.

Study of building blocks suitable for preparation of functional receptor materials for sensorics

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Theses supervisor: prof. Dr. RNDr. Pavel Matějka

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This project will focus primarily on the development of new anion receptors and their building blocks. The study will include both the synthetic part and the investigation of properties using multiple advanced techniques, such as NMR, optical molecular spectroscopy, molecular electrochemistry and calorimetry. A thorough investigation of the properties of the individual substances will provide new data to understand not only the patterns of behaviour of these building blocks in the presence of anions but also to predict the complexation behaviour of the applicable receptors.

Study of changes in material on the clay cement interface

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie

Study of compounds interfering with regulatory mechanisms for biofilm formation of unicellular eukaryotes

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie
Theses supervisor: prof. Ing. Jan Masák, CSc.

Annotation

Microbial biofilms are single-species or in nature more often multi-species communities that are created by active adhesion / colonization of cells on the various types of surfaces, resulting in the formation of populations with a different phenotype. The biofilm populations are characterized by high resistance to environmental conditions. Extensive knowledge has been obtained particularly in the field of bacterial biofilms, including the regulation of their formation. In the case of eukaryotic single-celled microorganisms, the regulatory mechanisms of biofilm formation are less known and especially are focused on pathogenic strains of the genus Candida. The subject of this dissertation is to find natural or synthetic substances including nanoparticles, which will interfere with the regulatory mechanisms responsible for biofilm formation and stability in selected yeast and micromycetes. The result should be the tools and procedures to specifically affect the colonization of surfaces with studied microorganisms in medicine and various industries.

Study of different technologies for dry hopping of beer

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie

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Dry hopping of beer is becoming very popular worldwide, and our breweries are also trying to use this technique. Dry hopping can be realized in a static and dynamic design and by using special aromatic hop varieties. The aim of this work is screening of the available, especially Czech hop varieties used for cold hopping and to compare the dry hopping and to select the appropriate regime of technology and equipment for small and large breweries.

Study of new psychoactive substances as potential neuro pharmaceutics

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: Ing. Martin Kuchař, Ph.D.

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The topic of the work is focused on the study of new psychoactive substances with a potential to treat mental illnesses such as depression, post-traumatic stress disorder or anxiety states of consciousness. Dissociative anesthetics represent a unique pharmacophore that bind to glutamatergic type receptors. Doses less than anesthetic, show interesting anxiolytic and antidepressant effects caused by the inhibition of NMDAR (N-methyl-d-aspartate receptor) and by promoting the brain neuroplasticity due to the BDNF (brain-derived neurotrophic factor) increased expression. Another important group of substances is a serotonin receptor agonist belonging to a psychedelic tryptamine family (psilocybin, dimethyltryptamine, bufotenin). A determination of pharmacokinetics, a metabolic profile and/or of a toxicity in a preclinical study is an essential characteristics for the initiation of a clinical trial with human volunteers in cooperation with the National institute of mental health. LC-MS techniques (HRMS QTOF) will be used for the identification of metabolites both in an animal model with Wistar rats and in vitro environment. A pharmacokinetic profile will be measured by a LC-MS quantitative analysis technique with an advance sample treatment protocol.

Study of polymorphs of lipophilic platinum complexes

Department: Department of Organic Technology, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials

Annotation

Lipophilic platinum complexes are the compounds with high antitumor effect in vitro and offer the possibility of oral dosage of final pharmaceutical. Up to now none was registered. One of the main reason may be their low solubility in water and thus low biological availability from GIT. The possible solution may be the use of apropriate polymorph that wil be the main aim of the PhD study.

Study of polysaccharide composition of fruiting bodies of medicinal mushrooms using modern instrumental methods

Department: Department of Carbohydrates and Cereals, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Mgr. Andrej Sinica, Ph.D.

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The doctoral thesis is focused on the experimental development of nanocomposite materials for example films based on polysaccharides (chitin, chitosan, cellulose, starch, hyaluronic acid) and its enrichment by drugs and biological active compounds obtained from non- traditional food matrices such as fungi, algae and other plants. These materials and its components will be characterised by modern analytical and physical methods: FTIR and Raman spectroscopy, SEM, AFM, XRD, TGA, GPC, NMR. Finally, mechanical properties and biological activities of such materials will be tested.

Study of porphyrin derivatives of Tröger and spiro-Tröger bases enabling recognition of cancer cells and photodynamic therapy

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programmes: Chemie, Chemistry

Annotation

A major problem in the treatment of cancer is the recognition of healthy cells from cancer and the selective removal or killing of cancer cells. Several substances that are used for visual diagnosis and photodynamic treatment are from the group of porhyrin and chlorine derivatives. The aim of this work is to prepare porphyrin, chlorine and bacteriochlorin derivatives of Tröger and spiro-Tröger bases and to study their usefulness for selective recognition of cancer cells and subsequent photodynamic therapy.

Study of structure-reactivity relationship in the hydrocarbon pyrolysis

Department: Department of Organic Technology, Faculty of Chemical Technology

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Various types of chemical bonds in the substrate molecules in the combination with reaction conditions directly influence the effective activity of radicals during the pyrolysis. This activity then has essential influence to the conversion of substrate. Especially, the presence of multiple bonds and branched carbon chain or aromatic bonds has a major influence to the radicals activity. The activity is also influenced by the mechanism of initiation of substrate. This mechanism can differ for individual substrates, e.g. aliphatic vs. cyclic alkanes. The study will include the investigation how or why individual structure elements influence the reactivity and the model idea about this relation will be established from the aspect of formation of both the desired products and the coke deposits. Experimental study will perform lab-scale pyrolysis using pure substances of prepared mixtures. Obtained data will be deeply studied using mathematical model with automated reaction network generations.

Study of the degradation processes in the mid-temperature PEM type fuel cells

Department: Department of Inorganic Technology, Faculty of Chemical Technology

Annotation

An attention of the numerous laboratories around a globe is focused on the issue of the PEM type fuel cells operational temperature increase above 100 ºC. The globaly accepted approach to solve this problem consists in application of basic polymers impregnated with phosphoric acid as an electrolyte and carbon supported Pt nanoparticles as an electrolyte. The main obstacle of this approach represents corrosion aggressivenes of the phosphoric acid at the fuel cell operational conditions. The closer understanding of these processes represents an important condition of further improvement of this technology and its future practical application.

Study of transport characteristics in various types of bioreactors

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: doc. Dr. Ing. Tomáš Moucha

Annotation

The production of new biotechnology and pharmaceutical products is based on a bioreactor design. The choice of a suitable type of bioreactor is crucial with respect to maximum yield, but it is also limited by the lifetime of the microorganisms present. The aim of the doctoral study is to compare design parameters (transport characteristics) of three types of the most commonly used bioreactors. The results will be used to characterize the differences and similarities of specific types of bioreactors in terms of gas distribution, mass transfer and mixing depending on the total energy supplied to the system. Transport characteristics will be obtained experimentally for model batches, which will be designed based on physical properties of real broths. Both cooperating departments are well equipped and have all the three types of bioreactors i) mechanically stirred reactor, ii) bubbled column and iii) air-lift reactor. All bioreactors are adapted to measure transport characteristics by the same methods, therefore the results will be comparable. Requirements for applicant: master degree in chemical or mechanical engineering, organic technology, biotechnology etc.; ability for teamwork; systematic and creative approach to scientific problems; interest in experimental work Further information: Assoc. Prof. Tomáš Moucha, building B of UCT Prague, room T02, e-mail: tomas.moucha@vscht.cz

Study on hydrometallurgical methods for separation of K and Rb from solutions

Department: Department of Metals and Corrosion Engineering, Faculty of Chemical Technology
Theses supervisor: Ing. Nguyen Hong Vu, Ph.D.

Annotation

Potassium and rubidium are often present together in solutions after processing lithium micas for lithium recovery using pyro- or hydrometallurgical methods or after processing cement by-pass dust. Due to the similar chemical and fyzical properties their selective separation is very difficult. The disertation thesis is airming to develop and verify new hydrometallurgical processes for their effective separation by a suitable combination of solvent extraction, ioin-exchange or precipitation methods.

Study on polymer-bound immunomodulators for medical purposes

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Olga Janoušková, Ph.D.

Annotation

Biocompatible and biodegradable polymer based molecules are very interesting and nowadays widely studied materials. Their structure and characteristics are suitable for binding a number of molecules, e.g. therapeutics, inhibitors or stimulants. This polymer-bound therapeutics show less side effects than free drug and provide the possibility of better targeting of tissues and cells. The immune system of animals, including human, is a complex of cellular structures, individual cells and biochemical reactions. It’s the line of one’s first defense in infectious and non-infectious diseases. This dissertation will include the design of polymer structures, selection of suitable effector ligands, chemical synthesis and testing of molecules in vitro on cell and bacterial lines and on blood samples donated from donors or patients. This dissertation is an intersection of macromolecular chemistry, biochemistry, cellular and molecular biology and microbiology. All data and information acquired during this research will be used for further development of molecules able to modulate immune response according to the therapy of choice.

Study on special esters

Department: Department of Organic Technology, Faculty of Chemical Technology
Theses supervisor: Ing. Jiří Trejbal, Ph.D.

Annotation

There is an increasing demand for renewable materials worldwide. Such interesting materials may be special esters based on biotechnologically prepared carboxylic acids and alcohols. These include esters of acrylic acid with bio alcohol and, for example, itaconic acid esters. There is very little information about the technology of these substances in the literature. Often basic physicochemical data such as boiling points, density, viscosity, etc. are not available. Phase data and mathematical models are missing. Another area worth exploring is reaction kinetics, where the respective catalyst and its properties play a major role. The aim of this work will be to extend the range of knowledge in the field of studied substances with a focus on the creation of mathematical models describing the chemical and physical behavior of studied systems.

Supercritical solvent impregnation of natural extracts in polymers

Department: Department of Organic Technology, Faculty of Chemical Technology
Theses supervisor: Ing. Marie Sajfrtová, Ph.D.

Annotation

Active substances are incorporated into polymers by various impregnation techniques. The disadvantages of conventional impregnation methods, such as low diffusivity, long contact time, high solvent and additive consumption, or high operating temperature, can be overcome by using supercritical CO2 (scCO2) as a solvent. In addition to being environmentally friendly, it easily penetrates various matrices due to its high diffusivity, low viscosity and near zero surface tension. Another advantage is that CO2 is gaseous at room temperature and pressure which provides solvent-free polymeric matrices. Supercritical impregnation with carbon dioxide as the solvent will be used to incorporate the health-promoting natural substances in the polymeric matrix. The influence of operational conditions (pressure, temperature, extract: CO2 mass ratio, and impregnation time) on impregnation efficiency will be tested.

Supramolecular assemblies and gels from helicene-polypeptide conjugates: synthesis and chiroptical properties

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie (double degree)

Annotation

This work will be focused on the preparation and characterization of new supramolecular systems based on helicene-polypeptide conjugates. The polypeptide moiety will be systematically modified to produce highly ordered supramolecular aggregates stabilized by hydrogen and other interactions. Common methods of structural analysis including highly sensitive methods of chiroptical spectroscopy (electronic circular dichroism ECD, vibrational circular dichroism VCD and Raman optical activity ROA) will be used for the characterization.

Supramolecular structure of substances in organics electronics

Department: Department of Computing and Control Engineering, Faculty of Chemical Engineering

Surface enhanced fluorescence as a tool for nanotransporter localization in a cell

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Theses supervisor: doc. Ing. Kamil Záruba, Ph.D.

Annotation

The project will deal with the development of fluorescence analysis methods for reliable detection of the localization of drug nanocarrires in a living cell. Although fluorescence methods show favorable detection limits in many cases, many organic fluorescent substances exhibit toxicity even at very low concentrations. Current methods of fluorescence microscopy make it possible to monitor the localization of practically individual nanoparticles that have penetrated the cell membrane into the cell. Surface-enhanced fluorescence that occurs near metallic nanoparticles may allow the detection of fluorescent substances at such low concentrations that allow the application of completely non-toxic (low) doses of the preparations to study the chemical behavior of living cells in the presence of these transporters.

Surface-Mounted Molecular Motors

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Jiří Kaleta, Ph.D.

Annotation

Organizace jednotlivých molekulárních strojů do pravidelných 2-D uskupení se jeví jako slibná cesta směřující k nové generaci inteligentních materiálů. Tak například seřazením jednosměrných molekulárních motorů do hustě sbalených dvojrozměrných filmů může dojít k zesílení jejich vlastností, které se tak mohou projevit i v makrosvětě, a takovéto materiály mohou být teoreticky použity jako nové pohonné systémy. Cíle tohoto mezioborového projektu zahrnují návrh a syntézu nové generace jednosměrných světlem poháněných molekulárních motorů, které budou poté použity k přípravě organizovaných 2-D filmů na různých površích. Takováto 2-D uskupení budou následně studována různými analytickými technikami. Tento projekt tak kombinuje několik oborů chemie – od organické, přes materiálovou až po fyzikální.

Suspension rheology – from theoretical foundations to practical applications

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

Annotation

The rheology of suspensions is a topic of widespread interest that is important in ceramic technology and many other fields. This PhD topic involves the theoretical treatment of basic problems in suspension rheology, mainly the dependence of the effective viscosity on particle shape, size and size distribution, as well as practical work with purely viscous non-Newtonian fluids as well as viscoelastic systems, mainly using rotational viscometry and oscillatory rheometry. The student is required to have a general chemical engineering background, not necessarily based on (and by no means limited to) ceramic technology.

Suspension rheology – from theoretical foundations to practical applications

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

Annotation

The rheology of suspensions is a topic of widespread interest that is important in ceramic technology and many other fields. This PhD topic involves the theoretical treatment of basic problems in suspension rheology, mainly the dependence of the effective viscosity on particle shape, size and size distribution, as well as practical work with purely viscous non-Newtonian fluids as well as viscoelastic systems, mainly using rotational viscometry and oscillatory rheometry. The student is required to have a general chemical engineering background, not necessarily based on (and by no means limited to) ceramic technology.

Sustainability of different nutritional habits from LCA perspective

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

Annotation

Food produsction is currently identified as key environmental burden. Agriculture, food production, food packaging and distribution together with food waste management have serious environmental impacts. Population growth and need for food in urban systems results in increasing broadscale environmental stress. The purpose of this thesis is to evaluate different nutritional habits of selected key world regions and compae their environmental impacts from life cycle perspective. Output of the thesis is to define key factors influencing environmental impacts of food chain and propose environmentally friendlier nutrition habits.

Sustainability of food production

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

Annotation

Food production is one of the major sectors that has significant environmental impacts. From the point of view of the whole life cycle as well as from the point of view of material and energy flows, it is appropriate to find out which types of eating habits in different regions of the world represent a greater environmental burden. The availability of phosphorus is also important for the food product. The aim of the thesis will be to comprehensively assess the environmental impacts of the entire chain of food production, food packaging, distribution and waste management. The theme will be to compare the differences in food supply between urban and rural environments.

Sustainable development in business practice

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

Annotation

The dissertations will present the current knowledge of sustainable development towards business practice, the associated economic benefits and constraints, and last but not least, current recommendations, approaches, techniques for implementing this knowledge into business practice.

Synthesis and Applications of Novel Phosphinate Metal-Organic Frameworks

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: RNDr. Jan Demel, Ph.D.

Annotation

Metal-organic frameworks (MOF) are fast growing area of research that combine metal centres and organic linkers to form a crystalline material that contains pores. Due to the control on the molecular level and tunability of the structures, the specific surface area of MOFs is greater than 1000 m2/g. The chemical and topological diversity also allows tailoring the structure for given application. The aim of the dissertation thesis will be the synthesis and application of novel MOFs based on phosphinate (POOH) containing linkers. Within the frame of the thesis the student will learn synthethic procedures for the synthesis of novel phosphinate linkers, MOFs, their characterization (NMR, powder XRD, adsorption of N2, thermal analysis, etc.), and their applications. The work will be done at the Institute of Inorganic Chemistry of the Czech Academy of Sciences in Řež.

Synthesis and application of N-fluoroalkylated compounds

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Petr Beier, Ph.D.

Annotation

The recently reported synthesis of perfluoroalkyl azides and triazoles1 opened the door to study properties and reactivity of these compounds. In this project, the rich chemistry of (per)fluoroalkyl azides and triazoles1-10 will be investigated and new synthetic approaches to underdeveloped N-fluoroalkyl-containing compounds such as azides, azoles, azirines, ureas, carbamates, and amides will be studied. This class of compounds is expected to find utilization in drug discovery and in the development of new materials. Reference: 1. Z. E. Blastik, S. Voltrová, V. Matoušek, B. Jurásek, D. W. Manley, B. Klepetářová, P. Beier Angew. Chem. Int. Ed. 2017, 56, 346. 2. S. Voltrová, M. Muselli, J. Filgas, V. Matoušek, B. Klepetářová, P. Beier, Org. Biomol. Chem. 2017, 15, 4962. 3. V. Motornov, A. Markos, P. Beier Chem. Commun. 2018, 54, 3258. 4. Z. Blastik, B. Klepetářová, P. Beier Chem. Select 2018, 3, 7045. 5. S. Voltrová, I. Putovný, V. Matoušek, B. Klepetářová, P. Beier Eur. J. Org. Chem. 2018, 5087. 6. V. Motornov, P. Beier J. Org. Chem. 2018, 83, 15195. 7. A. Markos, S. Voltrová, V. Motornov, D. Tichý, B. Klepetářová, P. Beier Chem. Eur. J. 2019, 25, 7640. 8. V. Motornov, V. Košťál, A. Markos, D. Täffner, P. Beier Org. Chem. Front. 2019, 6, 3776. 9. S. Voltrová, J. Filgas, P. Slavíček, P. Beier Org. Chem. Front. DOI: 10.1039/c9qo01295h. 10. O. Bakhanovich, P. Beier Chem. Eur. J. DOI: 10.1002/chem.201903627.

Synthesis and characterisation of particles with immuno-adhesive properties

Department: Department of Chemical Engineering, Faculty of Chemical Engineering

Annotation

The specificity of adhesion to the target cells or tissues in a physiological envirionment is a key requisite for the successful implementation of drug delivery systems (DDS). The aim of this work is to explore DDS based on immunoliposomes and their composites (e.g. with magnetic nanoparticles) using surface modification by antibody fragments and other suitable targeting moieties. The immunoliposomes will be tested both in vitro and in vivo in terms of specificity of adhesion, pharmacokinetics, and ability do encapsulate and delivery drugs or pro-drugs.

Synthesis and properties of single-domain ReBCO-based crystals

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemie

Synthesis and study of properties of receptors for anions and electron rich compounds

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Theses supervisor: Ing. Petra Cuřínová, Ph.D.

Annotation

Anions play an important role in many biological processes and their unbalanced concentrations can stand behind serious medicinal and environmental issues. Receptors of anions and electron rich molecules possess a tool for their detection or separation form mixtures. This project targets the design and synthesis of receptors for anions and electron rich compounds with biological activity, their testing using NMR, UV-vis and HRMS spectrometry and their possible anchoring to carriers. The applicant will, except the synthetic work, get experience in the field of these spectroscopic techniques.

Synthesis and transformations of fluoroalkylated heterocycles

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Petr Beier, Ph.D.

Annotation

Fluorine-substituted heterocycles continue to play an important role in pharmaceutical research and in the development of new materials. In this context, generally applicable and direct fluoroalkylation on carbon atom of the heterocyclic ring or nitrogen atom of the nitrogen heterocycle remains an unresolved challenge. In this project, we will focus on radical and ionic introduction of fluoroalkyl groups (such as the trifluoromethyl or difluoromethyl groups) to heterocyclic structures as well as transformations of primary products into new heterocyclic and acyclic fluorinated compounds.

Synthesis of chiral carboranes and metallacarboranes, their separation and interactions with organic systms

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: RNDr. Bohumír Grüner, CSc.

Annotation

This topics deals with synthesis of asymmetric boron clusters and their interactions with organic platforms.

Synthesis of chiral helicene-based polymers

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Jan Storch, Ph.D.

Annotation

The aim of this Ph.D. thesis will be the synthesis, characterization and chiral resolution of appropriate helicene derivatives for preparation of new chiral polymeric materials and the study of their polymerization: via chemical way, via electrosynthetic approach or via coordination with transition metals (MOFs). Simultaneously, chiroptical properties of newly prepared materials will be intensively studied.

Synthesis of extended polyaromatic systems for optoelectronics

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Jan Sýkora, Ph.D.

Annotation

The aim of this Ph.D. thesis will be the development of synthesis, structural characterization and a study of properties of extended polyaromatic [n]helicenes and [n]phenacenes (n > 16). Synthetized molecules will be used for preparation of functional layers, in the case of helicenes with the emphasis on their unique optical properties (CPL OLED, CPL OFET). Simultaneously, electrochemical properties and self-assembling on substrates (metals) will be intensively studied.

Synthesis of novel types of nucleotide analogues as enzyme inhibitors of nucleotide metabolism with potential antiparasitic and antibacterial activity

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Dana Hockova, CSc.

Annotation

In connection with the medicinal chemistry studies of the group, the topic of the project will be rational design and synthesis of novel types of nucleotide analogues as potential inhibitors of key enzymes involved in the metabolism of nucleic acid components. Emphasis will be placed on the selectivity of inhibition resulting from subtle differences in the active sites of enzymes of individual organisms. Crystal structures and molecular docking will be used to elucidate the inhibitors binding. Prodrugs of the best inhibitors will be prepared for cell-based assays. Biological activity of the prepared compounds, mainly antiparasitic (e.g. Plasmodium falciparum, Trypanosoma brucei) and antibacterial (e.g. Mycobacterium tuberculosis, Helicobacter pylori) will be studied in collaboration. References: Špaček, P; Keough, D. T.; Chavchich, M.; Dračínský, M.; Janeba, Z.; Naesens, L.; Edstein, M. D.; Guddat, L. W.; Hocková, D. Synthesis and Evaluation of Asymmetric Acyclic Nucleoside Bisphosphonates as Inhibitors of Plasmodium falciparum and Human Hypoxanthine-Guanine-(Xanthine) Phosphoribosyltransferase. J. Med. Chem. 2017, 60, 7539-7554.

Synthesis of polymeric drugs for chemoresistant tumors

Department: Department of Polymers, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Libor Kostka, Ph.D.

Annotation

Chemotherapy is an important modality in treatment of malignant diseases, however, it is seriously limited by chemo-resistance of many tumors. The main goal of the dissertation is to design structures, synthesis and study of physicochemical and biological properties of bio-degradable polymeric conjugates of anticancer drugs and STAT3 inhibitors. These conjugates should be able to suppress the side effects of conventional chemotherapy and also avoid tumor chemorezistence. Polymeric HPMA-based carriers will be prepared by new controlled polymerization methods, especially RAFT or CuRDRP. Synthetized will be carriers with linear, diblock or differently branched structure. The focus will be on organic and polymer synthesis of new polymeric conjugates and their characterization using modern instrumental techniques (SEC, FFFF, LC-MS, NMR, etc.). Testing of prepared drugs in biological systems will be done in cooperation with domestic and foreign partners. The knowledge and experience of an applicant in organic and / or macromolecular chemistry is an advantage, along with the desire to learn new things in other fields such as biochemistry or biology. We offer interesting and varied work in a young dynamic team at a top-quality academic workplace.

Synthesis of supamolecular structures of conducting polymers for organic electronics

Department: Department of Computing and Control Engineering, Faculty of Chemical Engineering
Study programme: Chemistry

Synthesis, characterisation and study of properties of polypeptides derived from elastin structure

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: prof. RNDr. Pavel Drašar, DSc.

Annotation

Elastin-like polypeptides are engineered tropoelastin-derived peptides. Due to their thermoresponsive properties, biocompatibility and biodegradability they are used in many applications, eg in hydrogels, micelles or in drug transport. The most commonly mentioned sequence is (VPGXG)n, where X is a hydrophobic nonpolar amino acid (Ala, Leu, Val, Ile) and n is most often 12. However, modulation of properties by sequence changes and replacement of amino acid X with charged, polar or aromatic amino acids has not been studied in detail. Thus, by replacing at least 2 amino acids at variable position X in sequence (VPGXG)n, the properties of the respective peptide can be altered. The project will aim on preparation of a series of elastin-like polypeptides with altered sequence depending on the used amino acid X, its location and at the same time will define the optimal length of the target sequence to meet the requirements for thermoresponsive behavior and solubility. Modern methods of solid phase peptide synthesis will be used for synthesis. Therefore, it will be necessary to characterize the prepared peptides in detail and demonstrate their binding properties by available spectral methods (UV, FTIR, NMR, CD, Raman spectroscopy and mass spectroscopy) and to verify the biological properties of the materials.

Synthetic derivatives of steroids as bilogically active substrates

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: prof. RNDr. Pavel Drašar, DSc.

Annotation

Subject of the project is the synthesis of steroid derivatives as biologically active substrates. Changes in steroid skeleton and its conjugation with selected synthons shall lead to novel compounds that will be investigated from the point of view of interaction with steroid receptors and in terms of possible supramolecular assembly properties.

System for remote monitoring of grey water reuse

Department: Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology
Theses supervisor: doc. Ing. Jan Bartáček, Ph.D.

Annotation

One of the main obstacles to the use of treated gray water (i.e. water from bathrooms or washing machines) is the missing method for automatic detection of contamination in the treated waste water. As a result, it is not possible to use recycled water where there is a higher risk of end users exposure to the water contaminated with pathogens (e.g. washing machines, cleaning floors etc.).
In this project, we will develop an early warning system that will automatically detect disturbances in gray water treatment technology and especially the penetration of pathogenic organisms into the recovered water.

Systems of antioxidants for lipidic cosmetic formulations

Department: Department of Dairy, Fat and Cosmetics, Faculty of Food and Biochemical Technology

Annotation

In recent years the situation in cosmetic industry has changed. Synthetic emollients based on non-renewable raw materials and traditional synthetic preservatives and antioxidants are less used, therefore demands on the antioxidant system increase significantly. The aim of thesis is the proposal of antioxidant system for emollients based on renewable raw materials, determination of mutual effect of individual antioxidants and in optimal case the use of antioxidant synergism for lipid protection. Penetration of antioxidants to different skin layers in vitro is going to find out.

Tailoring of nanostructure in mixed matrix membranes for selective removal of CO2 from biogas

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Theses supervisor: doc. Ing. Karel Friess, Ph.D.

Annotation

Membrane separation processes belong to modern technologically important separation methods, which are less demanding (economically and ecologically) in comparison with classical separation methods. For the gas separation applications, mainly polymer membranes are used. Their performance (permeability or separation effect) can be additionally adjusted by the targeted embedding of liquid or solid additives into the polymer matrix. The dissertation thesis will focus on the preparation, characterization, and testing of the so-called mixed matrix membranes for the separation of gases based on glassy polymers and functional nano-additives with a purposefully prepared structure. In addition, modeling of the separation process will be part of the work. The result of this work will be prepared and tested membrane material for the effective removal of CO2 from biogas and extension of knowledge in the given membrane field.

Targeted analysis of metabolic pathways – metabolomics and fluxomics by LC-MS/MS

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: RNDr. Ondřej Kuda, Ph.D.

Annotation

The focus of our lab is the metabolism and regulatory actions of bioactive lipids, specifically those related to pathways of glucose and lipid metabolism and pathophysiology of metabolic diseases (https://www.fgu.cas.cz/en/departments/metabolism-of-bioactive-lipids). The aim of the project is to develop a methodology to describe changes in metabolic flows in pathophysiological conditions based on biochemical knowledge and methods of analytical chemistry. This topic covers experiments with cell lines, biochemical analyses of metabolites and functional tests using stable isotopes and radionuclides, optimization of UPLC-MS/MS methods for tracking 13C, 15N and 2H-labeled metabolites (glycolysis, citric acid cycle, oxidation and lipid synthesis, ...). The final data will be modeled with fluxomic software solutions on metabolic maps. Project will be carried out at the Institute of Physiology ASCR, v.v.i. and financially secured by GA CR grants. We are looking for curious, imaginative, independent and highly-motivated applicants with experience in analytical chemistry or (bio)chemistry.

Technological procedures for optimizing the content and usability of bioactive substances in primary cereal products

Department: Department of Carbohydrates and Cereals, Faculty of Food and Biochemical Technology

Annotation

Recently, the emphasis has been placed on using whole grain flours or flours with increased fiber content for bread and other bakery products. This is not only an attempt to reduce the glycemic index of the resulting products, but also the use of biologically active and nutritionally important components of the fiber or the substances that accompany it in outer layers. The aim of the thesis is to test and optimize the technological procedures used in the primary processing of cereals, both in the stage of preparing the grain for processing and during its own disintegration process. These include, in particular, different forms of hydrothermal grain treatment, surface treatment (different peeling intensity), or grain disintegration techniques and their modifications. The content and especially bioavailability and physiological utilization of selected nutritionally important substances in the products of primary processing of wheat, rye and other selected cereals and pseudocereals will be examined using different methods of preparation and disintegration. The aim of the work will be to propose several technological processes leading to optimization of content and bioavailability of selected bioactive substances in the final products.

Technologies for removal of antibiotic resistant bacteria and antibiotic resistance genes from sewage sludge

Department: Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology
Theses supervisor: doc. Ing. Jan Bartáček, Ph.D.

Annotation

In this Ph.D. project, we will quantify the amount of antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs) that enter the environment through the application of sewage sludge in agriculture. Further, we will test the effectiveness of technologies for sanitation of sewage sludge (thermophilic anaerobic stabilization, thermal hydrolysis, pasteurization, liming etc.) in terms of their ability to remove antibiotic resistance. For all technologies, process conditions will be sought to ensure the removal of ARB and ARGs that occur in free DNA. As test sludges, sludges from thermophilic and mesophilic anaerobic stabilization, sludges after aerobic stabilization, sludges from fat separators, and wastes exported to wastewater treatment plants will be selected. The aim of the project is to propose parameters of sludge disinfection processes that safely ensure the removal of ARB and ARG so that sludge can be used as fertilizer. The work will be done under the co-supervision of prof. Lise Apples of KU Leuven and the doctorate should result in a double degree from UCT Prague and KU Leuven.

Technologies for the removal of antibiotic resistant bacteria from sewage sludge

Department: Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology
Theses supervisor: doc. Ing. Jan Bartáček, Ph.D.

The application of microspectroscopic and near-field techniques for drug development

Department: Department of Physical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie
Theses supervisor: prof. Dr. RNDr. Pavel Matějka

The authenticity of honey and other bee products

Department: Department of Food Preservation, Faculty of Food and Biochemical Technology

Annotation

Honey is widespread and the most important bee product. Due to the high price, its quality and authenticity are commonly violated. Frequently, it is the manufacturer's deliberate adulteration (addition of other ingredients to honey) or misleading indication of botanical or geographical origin. The project will be focused on verifying the authenticity of honey according to pollen grain analysis, carbohydrate profile, volatile compounds and basic physico-chemical analysis. The botanical origin of honey (floral, honeydew, unifloral) and its geographical origin will be also assessed based on these parameters. The evaluation of beeswax, which can be relatively easily adulterated with paraffins, stearic acid or palmitic acid, will be the second part of the project. This phenomenon can have a negative impact on the health of bee colonies and the chemical composition of honey.

The effect of modern technologies on the quality traits of meat and meat products

Department: Department of Food Preservation, Faculty of Food and Biochemical Technology

Annotation

The red meat industry has been identified the variability in eating quality as a significant disadvantage to consumer demand. A more consistent eating quality can be a key differentiation and demand driver for specific meat products in the market. Consumer expectations of product performance and reliability, particularly tenderness and colour, will continue to rise. Quality based differentiation can provide significant benefits to consumer satisfaction and capture unrealised value for the Czech industry. The utilisation of novel technologies is a promising area to deliver alternative methods to the industry and provide a competitive advantage in the area of value-addition. The development of novel tenderisation methods can boost the profitability of the meat industry. With this respect, the effect of pulsed electric fields (PEF), high pressure processing (HPP), shockwave (SW), ohmic heating (OH) technology on meat and meat products quality traits will be investigated.

The effect of natural preparations for plant nutrition and vitality on microbiological diversity and biotechnological potential of grapevine

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie

Annotation

At present, there is a growing demand in agriculture for protective preparations manufactured from natural sources. This trend is related both to the expansion of ecological or biodynamic agriculture and to the efforts in the reduction of the use of chemical compounds that afflict the soil and the environment. The aim of the dissertation thesis is a cooperation in the development and testing of plant preparations that belong to the field of biodynamic agriculture. In selected preparations, the positive effects on the vitality of plants will be monitored. At the same time, these preparations will be characterized by quantitative and qualitative methods of chemical analysis. Another objective is to verify the effect of the application of these preparations on the natural microflora of grapes, whose composition and activity is essential for the successful realization of spontaneous vinification. Closely related to this point is the biotechnological analysis of fermentation (process dynamics, qualitative and quantitative changes within the microbial consortium, sensory comparison of the final product, etc.).

The effect of plant extracts and their biologically active substances on biofilms of opportunistic pathogens and commensal microorganisms

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie

Annotation

Biofilms are communities of microorganisms, which play an important role in many aspects of human activities, including colonization of issues or implanted medical equipment and tools. Microbial biofilms are characterized by significantly different phenotype of their cells and by a wide range of interactions, both internal and external, including high resistance against unfavorable conditions or antimicrobial compounds. The aim of the dissertation thesis will be to study interactions of biologically active compounds of natural origin with microbial biofilms, including the possibility of synergistic effect resulting from the joint action of substances (e.g. complex plant extracts). Among the studied model microorganisms will be opportunistic pathogens, commensal and beneficial strains connected e.g. with the human digestive tract, with the emphasis on adhesion and biofilm formation. Included in the thesis will be characterization of the studied plant extracts, both the content of individual compounds and the overall properties (antioxidative activity etc.).

The effect of thermal pasteurization and thermal sterilization on the microbial stability of canned products

Department: Department of Food Preservation, Faculty of Food and Biochemical Technology
Theses supervisor: doc. Ing. Aleš Rajchl, Ph.D.

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Technological processes using the effects of thermal pasteurization and thermal sterilisation applied in the canning industry are not always sufficient, in particular, for elimination of some health and technological undesirable thermo-resistant microorganisms. Their resistance to high temperatures can be characterized as 'D' and 'z' values. In the past these inactivation parameters were detected in the foods model systems based on liquid cultivation media, but not in real solid foods, as it would be more appropriate. The doctoral thesis is focused on the determination of the heat characteristics ('D' and 'z' values) for selected microorganisms isolated from pasteurized or sterilized industrially produced canned products. Another area of interest is sublethal injury of microorganisms during thermal processes with subsequent reparation (or even resuscitation) ability of partly injured cells in the environments rich in proteins, magnesium and manganese ions, using modern and classical detection methods. The aim of the work is to submit an innovative complex of theoretical knowledge and experimental results for evaluation of microbial stability of heat-treated canned products during the protection of its health safety, technological harmlessness and standard quality.

The non-specific phospholipases C from Arabidopsis thaliana: structure-function relationship

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology

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This PhD work aims to elucidate the catalytic mechanism, structure and structure - function relationship of non-specific phospholipase C (NPC) from Arabidopsis thaliana. Six genes encoding NPCs (NPC1-NPC6) have been identified in the Arabidopsis thaliana genome. In our previous experiments with NPC4, it was found that this enzyme produces, besides the expected product - diacylglycerol, surprisingly also phosphatidic acid. This second activity seems to have been overlooked so far. In this project we will focus on the study of this phenomenon by mutagenesis and try to elucidate the structure and catalytic mechanism of these enzymes. The effect of mutations on plant phenotype will also be investigated.

The quality of working life and OSHA

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

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The doctoral thesis will deal with the evaluation of the quality of working life at the regional and company level using long-term time series of data on the quality of life in the CR. Analyzes will identify what determine work-related injuries in selected Czech regions and branches, aimed at creating and testing a model that can improve the quality of working life with a focus on risk prevention of OSHA.

The role of PRDM9 histone methyltransferase in genetic recombination and reproductive isolation between species

Department: Department of Informatics and Chemistry, Faculty of Chemical Technology
Study programmes: Bioinformatics, Bioinformatika

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The Prdm9 gene determines localization of meiotic recombination hotspots in genome of mice, humans and other mammalian species. In our laboratory we discovered another function of Prdm9, as a major hybrid sterility gene responsible for infertility of hybrids between related mouse species. To verify Prdm9 as the first speciation gene in vertebrates various combinations of Prdm9 alleles will be tested by genome-wide mapping of PRDM9 hotspots and their correlation to fertility phenotypes. The optical maps at the large scale and the genomic hotspot maps of recombination will be generated by Bionano optical mapping technology and by Illumina platform based ChIP-seq technology, respectively. The aim of this PhD thesis will be, using bioinformatics tools, to analyze the acquired datasets with the perspective to get correlations between maps from mice with different phenotypes and to determine key components of genomic structure and recombination landscape crucial for hybrid sterility.

The role of immune system in pulmonary hypertension

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: RNDr. Lydie Plecitá, Ph.D.

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The main feature of pulmonary arterial hypertension is arterial wall remodeling towards thickening of vessel wall that leads to an increase of pulmonary arterial pressure, right ventricular hypertrophy, its failure and premature death. Remodeling of artery wall is complex and changes in energy metabolism and apoptotic resistance of cells within wall layers leading to cell hyperproliferation are part of it. Recent studies recognized pro-inflammatory reactions of immune cells as participants in wall remodeling. In collaboration with US partner, we study fibroblasts from adventitia as a major player in attraction and activation of immune cells. Our preliminary results have shown that metabolically changed fibroblasts are capable of producing cytokines, which induce pro-inflammatory process contributing to pulmonary artery remodeling. This study will define changes in energy and redox metabolism of fibroblasts, which lead to production of cytokines, possibly chemokines subsequently attracting and activating macrophages, T cells or other cells of immune system. The goal of the project is to specify metabolites of fibroblasts, which induce cytokine secretion leading to activation of immune system.

The role of myristic acid in the interaction of retroviruses with the membrane and maturation of the viral particle

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Tomáš Ruml, CSc.

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One of the late steps in the retroviral life cycle is coating of the immature particle with a lipoprotein membrane derived from the cytoplasmic membrane of the infected cell. The outer layer of the retroviral protein coat is formed by the domain of a matrix protein that interacts with membrane phospholipids via the basic domain and the N-terminally attached myristic acid. HIV has been shown to cause myristate immersion in the cytoplasmic membrane by a mechanism called myristoyl switch. The aim of this work is to characterize the conditions leading to this process in D-type retroviruses which, unlike other retroviruses, do not form particles on the cytoplasmic membrane but in the cytosol. In the next phase of the work, the structural changes induced by the myristoyl switch and the effect of these changes on viral particle maturation should be characterized.

The structure characterization of electrode materials for the medicine diagnostics

Department: Department of Solid State Chemistry, Faculty of Chemical Technology
Study programme: Drugs and Biomaterials

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The work will deal with the structural characterization of electrode materials for medical diagnostics, eg for the detection of tick encephalitis by electrochemical methods. The term structural characterization refers to all solid microstructure analytical methods. However, in advance, X ray structural and phase analysis. Cooperation with older doctoral students who deal with this topic and cooperation with the Department of Analytical Chemistry of the Faculty of Science of the Charles University in Prague is supposed.

The study of improvement of non-thermal discharges and their applicability for decontamination purposes

Department: Department of Physics and Measurement, Faculty of Chemical Engineering

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The aim of the work is to improve existing non-thermal electrical discharges and to analyze their decontamination properties. The term improvement means to increase the discharge current and power possibly to achieve qualitative change in the discharge regime without an undesirable phenomena such as the transition into the arc or spark discharge, the excessive release of heat in the discharge area etc. In general the improvement of discharges can be made in several ways, e.g. including of suitable component in to the electrical circuit of the discharge, changing of the electrode geometry, changing of the character of supply voltage or influencing of the created plasma between the discharge electrodes. The last case comprises additional supplying of flowing gas in to the area between electrodes, influencing of the plasma by electromagnetic field, ultrasound waves etc. Consecutively improved electrical discharge will be analyzed for surface or liquid decontamination purposes. There will be found out decontamination efficiency (percentage decrease of bacteria after discharge exposition) and energy yield of decontamination (the ratio of quantity of deactivated bacteria and the energy delivered into the process).

The synthesis of glycomimetics using photocatalytic glycosylation and their biological evaluation.

Department: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology
Theses supervisor: Ing. Kamil Parkan, Ph.D.

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Carbohydrates have demonstrated the ability to perform crucial tasks in biological processes. However, the advancement in carbohydrate research is relatively slow due to the problems associated with the complexity of carbohydrate structures and the lack of general synthetic methods. The recent development of photoinduced carbohydrate synthesis under catalytic conditions, in conjugation with sub-stoichiometric amounts of activating agent, could further advance the field of carbohydrate chemistry. The use of photocatalysis is heading towards “greener” chemistry, where air and moisture is tolerated, reactions undergo at room temperature, and enhanced synthetic efficiency through the reduction of unnecessary waste is attained. The project will be focused on the novel modular synthesis of various biologically prospective glycomimetics, which will be more stable towards chemical and enzymatic hydrolysis. For the synthesis of these glycomimetic (S- and N-glycosides), photoinduced glycosylation in the presence of photocatalyst will be used. These prepared glycomimetics will be tested for their affinity towards galectins (Gal-1, Gal-3, Gal-7), which are involved in many physiological functions, such as inflammation, immune responses, cell migration, autophagy and signalling.

The use of anammox bacteria as the source of specific membrane phospholipids

Department: Department of Water Technology and Environmental Engineering, Faculty of Environmental Technology
Theses supervisor: doc. Ing. Jan Bartáček, Ph.D.

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This research focuses on the study of membrane phospholipids (mainly ladderans), which can be found in membranes of anammox bacteria. These phospholipids, which do not occur in any other bacteria, have a very unusual chemical structure and form extremely resistant membranes. The aim of this research is a detailed description of the properties and functions of membranes made of ladderans and the search for extraction methods and subsequent use of ladders.

Therapeutic potential of G protein-coupled receptor modulators

Department: Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology
Theses supervisor: prof. Ing. Tomáš Ruml, CSc.

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G protein-coupled receptors (GPCRs) are essential mediators of cellular signaling and important targets of drug action. Measuring the activity of new compounds and/or determination of their mode of action (agonist/antagonist) is promising from pharmaceutical as well as biochemical point of view. The library of substances, isolated either from natural sources or obtained via rational design synthesis will be tested against panel of therapeutically promising GPCRs. The approach of G protein-independent β-arrestin recruitment assay will be used as this can measure the activation of majority of GPCRs and allows for potential parallel screening in robotic-assisted format.

Thermal shock resistance of ceramics and refractories

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

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Thermal shock resistance is one of the most complex properties of ceramics and refractories. Therefore this PhD topic involves modeling the dependence of elastic properties (Young’s modulus, Poisson’s ratio), thermal conductivity, thermal expansion coefficients, bulk density, specific heat capacity, strength and fracture toughness on the phase composition and microstructure of ceramic materials. The student is required to have a solid background knowledge in ceramic science and technology as well as the ability to combine computer modeling with experimental work on real materials from both fine and coarse ceramics.

Thermal shock resistance of ceramics and refractories

Department: Department of Glass and Ceramics, Faculty of Chemical Technology

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Thermal shock resistance is one of the most complex properties of ceramics and refractories. Therefore this PhD topic involves modeling the dependence of elastic properties (Young’s modulus, Poisson’s ratio), thermal conductivity, thermal expansion coefficients, bulk density, specific heat capacity, strength and fracture toughness on the phase composition and microstructure of ceramic materials. The student is required to have a solid background knowledge in ceramic science and technology as well as the ability to combine computer modeling with experimental work on real materials from both fine and coarse ceramics.

Thin films of multiferoic hexagonal ferrites with magnetoelectric properties

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Josef Buršík, CSc.

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The scope of proposed PhD work involves in the experimental part the technology of preparation of ceramic samples and thin films of multiferoic hexagonal ferrites with magnetoelectric properties by soft chemistry routes, and their complex chemical, microstructural, structural and physical characterization. The PhD study will be focused to the Y- and Z-type hexaferrites studied in the form of ceramics and thin films. In particular, thin films will be prepared by means of chemical solution deposition methods using spin- or dip-coating deposition technique. Chemical investigation includes systematic study of their real (micro) structure (x-ray and neutron diffraction, electron microscopy) in relation to their functional properties. Physical investigations include measurements of electrical conductivity, dielectric properties complemented with the magnetic and magnetoelectric measurements (in cooperation with both domestic, and foreign physical laboratories).

Titanium oxides and titanates for advanced applications

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: Ing. Jan Šubrt, CSc.

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Li-ion batteries are one of the most promising electrochemical power sources. Ti-based materials such as Li4Ti5O12, Li2Ti3O7, TiO2-B and H2Ti3O7, are considered as important anodes for Li-ion batteries due to their high safety and excellent cycling stability. Li-ion battery (LIB) technology (typically using carbon materials as the anode) faces serious challenges if it is to take over the hybrid electric vehicles and stationary power sources. Ti-based compounds, especially Li4Ti5O12 have been demonstrated as the most promising anode materials for large-sized LIBs since they exhibit excellent cycling reversibility and a high operating voltage to ensure improved safety. However, the rate capability of these Ti-based materials are relatively low because of a large polarization at high charge–discharge rates. To enhance its electrical conductivity, ion doping and surface modification, and ionic diffusivity by designing various nanosized materials were used. A new preparation method will be used based on the extraction of sulphate ions from the crystals of titanium sulphate hydrates and their replacement with hydroxyl groups in aqueous alkali solution. The method leads to nanostructured metatitanic acid or alkali titanates and is suitable also for metal doping the material.

Towards new glycomaterials: Targeted hydrogen-bond manipulations in synthetic polysaccharide segments

Department: Department of Organic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Mgr. Jindřich Karban, Ph.D.

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Polysaccharides are long polymers composed of monomeric carbohydrate units linked together by glycosidic linkages. Some polysaccharides, for example cellulose or chitin, function as a structural support in organisms. Unique material properties of these polysaccharides result from a dense network of hydrogen bonds and other non-covalent interactions. Targeted modifications of the hydrogen bond network can create new glycomaterials with potential in medicine and other fields. The purpose of this graduate project is to synthesize and characterize short (up to six units) segments of polysaccharides in which hydrogen bonds have been selectively disrupted by replacement of a hydroxyl with fluorine. By comparison of conformation, solubility, aggregation behaviour, optical behaviour and crystallinity between natural and fluorinated segments we will be able to establish correlation between segment structures and properties. These findings will provide guidance towards glycomaterials with defined properties.

Toxic working relationships and Occupational health and safety/OSHA (occurrence, risks, and prevention)

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

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The doctoral thesis will focus on an evaluation of the level of toxicity of labor relations (especially relations between superiors and subordinates, the content of work and quality of working conditions) and the impact of psychosocial factors on OSHA in businesses with a high proportion of automation, robotization, and artificial intelligence. The aim is to develop and test models of people management systems that motivate risk prevention.

Transcriptome analysis of acute and degenerative disorders in the central nervous system

Department: Department of Informatics and Chemistry, Faculty of Chemical Technology
Study programmes: Bioinformatics, Bioinformatika
Theses supervisor: doc. Mgr. Daniel Svozil, Ph.D.

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In the last decades, our knowledge of the molecular basis of life has increased tremendously. Technical breakthroughs from physics, chemistry and biology facilitated the development of new technologies producing massive amounts of data. Particularly, RNA sequencing (RNA-Seq) has dramatically influenced the landscape of many life science disciplines. Although large RNA-Seq datasets can be produced in a rapid and cost-effective way, their analysis, visualization and interpretation represent a major bottleneck in the future development. The main focus of this thesis is to develop and implement computational pipelines for analysis of various RNA-Seq datasets generated in acute (stroke, spinal cord injury) and degenerative disorders (amyotrophic lateral sclerosis and Alexander disease) in the central nervous system. The spectrum of datasets encompasses standard bulk RNA-Seq data, so as datasets of small RNA species and single-cell transcriptomes. As the RNA-Seq is a fast developing field, main emphasis will be put on the development, application and improvement of new algorithms and bioinformatics tools covering various steps of data analysis, including raw data processing, quality control, normalization, data visualization and integrative analysis.

Transformations of aerosol particles due to changes in gaseous environment

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: Ing. Vladimír Ždímal, Dr.

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The aerosol particles are omnipresent in the atmosphere, influencing many processes on the Earth starting from the global warming to health effects. They tend to be both in physical and chemical equilibrium with their gaseous environment, but due to dynamic changes in the atmosphere or during their transport to human lungs, the particles change during their lifetime. Therefore, it is necessary to study their answers to these changes to be able to predict their fate and effects after their release to or formation in the atmosphere. The study will be carried out using a newly developed system of laminar flow reactors enabling to control ambient conditions of particle neighborhood. The doctoral student is supposed to study these phenomena using advanced methods of aerosol instrumentation including on-line chemical and physical characterization of particles by aerosol mass spectrometry.

Transparent ceramics for optical applications synthetized by pressure- or vacuum-assisted sintering methods

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry (double degree)

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Transparent ceramics can compete with single crystalline materials not only in the stage of research and development but also in the final application. The thesis will be focused on the synthesis of oxide ceramics applicable in the laser or LED field, or utilizable at the detection of ionizing radiation. Spark plasma sintering (SPS) or vacuum sintering will be used for the processing of precursor powders whose optimal crystallinity and microstructure will be also the task of the thesis.

Transparent perovskite- or garnet-based ceramics for optical applications

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

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Synthetic garnets and perovskites belong to highly symmetric structures that are used in a wide range of optical applications due to their isotropic behaviour. Tuning of their properties (such as band gap width, phase transformation temperature etc. together with doping with optically active ions) can determine not only their applicability in optics but also the variability of their synthesis. The thesis will be focused on the development of new cubic-based structures that could find an application in laser or scintillation techniques.

Transport of charge carriers in nanostructured and nanocomposite materials

Department: Department of Physics and Measurement, Faculty of Chemical Engineering
Theses supervisor: Ing. Přemysl Fitl, Ph.D.

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The topic of the thesis is theoretical and practical study of charge transfer mechanisms in nano-structured and nano-composite materials prepared in the form of thin films, coatings and aerogels. The aim of the thesis is to design models describing the charge transfer in real materials used for chemical sensors. The properties of the nanostructured samples will be measured in the Quantum Design - PPMS system, depending on the temperature and intensity of the magnetic field. The work involves (i) modeling and simulating the transport of charge carriers using the finite element method, (ii) designing and implementing software for managing, collecting and processing data obtained from PPMS system; (iii) seeking an analytical model describing the real (measured) properties of the samples depending on their nanostructure.

Triboelectric routes enabling plastic waste separation and recycling

Department: Department of Chemical Engineering, Faculty of Chemical Engineering
Theses supervisor: prof. Dr. Ing. Juraj Kosek

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Recycling is the most beneficial and eco-friendly way to treat large amount of plastic waste. However, conversely to a public belief, the majority of plastic waste is burned in incineration plants or stored in landfills instead of being recycled. The bottleneck of the plastic waste treatment originates in the pre-separation, as only precisely separated waste can be recycled. Even the incineration process requires the pre-separation of plastics, mainly the removal of polymers containing halogens that could otherwise form harmful gases during combustion. Current methods like manual separation, IR spectroscopy or methods based on density differences aren’t sufficiently effective. The new promising technique, triboelectric separation, is based on the idea that each plastic material reaches different electrostatic charge by tribocharging (charging by friction) and therefore charged plastic mixtures can be separated in electric field. The objective of this Ph.D. project is the establishment of experimental bases (systematic series of data) related to charging and discharging dynamics in powders, which will provide integrated description of these phenomena. The student will also investigate opportunities for control of surface charge and subsequent separation of dielectrics in electric field. The student shall challenge several open problems: (i) relation between ESC and mechanical/chemical properties of materials, (ii) electric charge dissipation, (iii) charging of powders under the conditions simulating real industrial production of industrially important powders, (iv) the effect of charge on fouling, (v) charging for separation and recycling of plastic materials. The project is a pioneering work which is desperately needed and is sufficiently challenging for a student with interest in physico-chemical fundamentals of previously described processes. The student will work with highly qualified Ph. D. students and postdocs in our research group and will also cooperate with our European partners. Our laboratory is well prepared for the research of electrostatic processes (Faraday cup, corona charging, high-voltage separator) and characterization of powder texture and material properties (micro-tomography, atomic force microscopy – AFM). Info: phone 220 44 3296, office B-145, e-mailjkk@vscht.cz, web http://kosekgroup.cz

Téma práce v angličtině: Implementation of agile method in the field of applied technologies

Department: Department of Environmental Chemistry, Faculty of Environmental Technology

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The dissertation theses is focused on agile project management in the field of technology. Due to the scope and complexity of the topic, quantitative research is recommended, specifically the implementation of action research and case studies. The aim of this work is to expand the possibilities of using agile methodologies in the technology environment by specifying new practices that will be proposed in this work. The aim is to demonstrate the benefits of miplementing an agile methodology on a real project in a technological environment.

Usage of lanthanide complexes for spectroscopic studies of DNA structure

Department: Department of Analytical Chemistry, Faculty of Chemical Engineering
Study programme: Chemie
Theses supervisor: prof. RNDr. Petr Bouř, CSc.

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Circularly polarized luminescence (CPL) of lanthanides is sensitive to the local molecular environment, which can be used in biomolecular science. So far, however, only a few CPL applications in DNA studies have been reported. We will try to overcome some restraints of the methodology, such as by using a Raman optical activity (ROA) spectrometer to measure CPL spectra. This will make it possible to use lanthanide aqua-ions as non-invasive DNA probes in concentrations not distorting DNA structure. We expect to establish a connection between CPL and ROA spectral features and specifics of DNA structures.

Use of a biodegradable carrier in biofilm reactors for production of extracellular enzymes

Department: Department of Biotechnology, Faculty of Food and Biochemical Technology
Study programme: Biotechnologie

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The work is conducted under collaboration with Dekonta a.s. and with Institute of Macromolecular Chemistry of the AS CR, v.v.i., Prague that designs advanced microporous polyurethane foams with adjustable rate of biodegradation. Polyurethanes are synthesized as tailor-made polyester-ether polyols with different ratio of ether/ester segments to tune both appropriate hydrophilicity improving the adhesion of microorganisms and hydrolytic degradability.Polyurethane foam will be used as eco-friendly biofilm carrier and as primary or secondary source of carbon, energy and nitrogen for attached microorganisms in packed bed reactors for production of extracellular products e.g. enzymes. The research comprises evaluation of enzyme production and analytical evaluation of four basic processes of biological attract ofpolyurethanes:biodeterioration (FTIR and Ramanspectroscopy, SEM),biofragmentation (MALDI-TOF, HPLC-UV/RI, HPLC-MS and GC-MS), assimilation (Oxitop) and surface colonization (zeta potential, contact angle andimage analysis).

Use of natural and synthetic zeolites as meliorants

Department: Department of Solid State Chemistry, Faculty of Chemical Technology
Theses supervisor: Ing. David Koloušek, CSc.

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The proposed topic deals with water deficit