|
|
Analysis of measurement results of concrete permeability for air and water as a basis for estimating the actual durability
Kadlecová, Zlata ; Kolář, Karel (referee) ; Pavlík,, Vladimír (referee) ; Adámek, Jiří (referee) ; Anton, Ondřej (advisor)
Permeability surface layer of concrete is engaged in many research institutes around the world, because the surface layer is the weakest link in the entire concrete structure. This dissertation followed on the issue of global solutions and broadens the horizon of the covercrete issues. The aim of this work was to create the conversion relations between the methods for evaluating the permeability of concrete surface layer allow approximate evaluation of the surface layer of concrete depending on the current moisture. In practice mostly occur concrete, which surface mass of moisture is equal to 3 %, so this amount of moisture is selected as the reference. For comparison were used: the device TPT (Torrent Permeability Tester), device GWT (Germanns Water Permeability Tester) and methods ISAT (Initial Surface Absorption Test). A secondary aim was to create a unified methodology for measuring the device.
|
|
|
Design and synthesis of a potential orexin receptor OX2R modulator with the use of in silico methods
Kárová, Barbora ; Doležal, Rafael (advisor) ; Kolář, Karel (referee)
Orexinergic nervous system is a complex of neurons playing a significant role in managing sleep cycle and food intake. Orexin neurons situated in the lateral hypothalamus produce orexin neuropeptides A and B, which interact with two orexin receptors in a broad range of neurons in the brain. A reduced production of these neuropeptides due to the loss of orexin neurons is the cause of a specific and rare disease narcolepsy, which is currently incurable. A significant milestone in terms of drug research and development against narcolepsy is a study of Takashi Nagaraha's scientific group (2015), which was the first one to synthesize a non-peptidic agonist of the orexin 2 receptor (OX2R) that has inspired further design of new drug candidates with an increased chance to reach the clinical practice. This Bachelor Thesis is focused on the design and organic synthesis of a novel OX2R agonist with a 2-deoxystreptamine substructure and follows the Nagahara's study using rational and computer-aided drug design. The theoretical part is dedicated to the literature review of this issue, the practical part focuses on the design of 11 ligands using in silico and medicinal chemistry methods. The organic synthesis was then proposed, based on a retrosynthetic analysis, for the final candidate with the optimal...
|
|
|
Models of enzyme-substrate interaction in chemistry teaching
Mužík, Jakub ; Kolář, Karel (advisor) ; Bílek, Martin (referee)
The Diploma Thesis deals with the application of biochemistry tasks extended by a material and multimedia model in chemistry teaching at high school and university. The main objective was to find out whether the proposed tasks meet the criteria for inclusion in the teaching of biochemistry within laboratory exercises in high school seminars and university laboratory exercises. Qualitative research using the method of semi-structured interview, intrinsic motivation inventory and activity perception questionnaire were used for the analysis. The thesis is divided into a theoretical and a practical part. The theoretical part contains information about enzymes, their active center and today's views of their function. Furthermore, the emergence of a "guest-host" interaction between acid-base indicators and macrocyclic compounds - cyclodextrins, which serve as models for the demonstration of the interaction between the substrate and the active site of the enzyme, is described. The last chapter of the theoretical part is devoted to the methodology of research of tasks at high school and university. The practical part describes the tasks including experimentally obtained data for their realization and all the tools necessary for their implementation. Furthermore, the creation and use of material and...
|
|
|
Comprehensive chemical analysis of blood coatings
Matěcha, Tadeáš ; Kučková, Štěpánka (advisor) ; Kolář, Karel (referee)
This thesis deals with the comprehensive chemical analysis of blood coatings using mass spectrometry and infrared spectroscopy. The theoretical part focuses first on the history of use, properties, and formulations of blood coatings, then on their composition, which is divided into protein and non-protein components, as well as on selected analytical methods used for their identification. In the experimental part, 41 model samples and 2 real samples are evaluated and discussed. Liquid chromatography with tandem mass spectrometry (nano-LC-ESI-Q-TOF MS) was used to identify the protein component in all samples. Determination of the quantitative abundance of each type of protein additive in the blood coatings was performed based on the number of peptides found originating from proteins typical for specific protein additives. Furthermore, it was possible to identify the amino acid sequences that allow to determine the animal origin of the blood used. The non-protein components of all samples were identified by infrared spectroscopy, specifically by the attenuated total reflection and diffuse reflectance techniques. The quantitative analyses based on the change of the intensities of the measured spectra was also discussed. A special chapter is devoted to the identification of animal glue and to the...
|
|
| |
|
| |
|
| |
|
|
Sensory analysis as a means to increased transparency of analytical methods used in practical chemistry education
Kocichová, Kristýna ; Rusek, Martin (advisor) ; Kolář, Karel (referee)
The theoretical part of the thesis is focused on the description of sensory analysis, its history, basic methods, principles, and procedures in the analysis of solutions. It specializes in three basic tastes: salty, sour and bitter. It then focuses on explaining the basic analytical methods whose applications can be found in practical chemistry teaching, in particular an introduction to the principles of conductometry, spectrophotometry and potentiometry. It then addresses the issues of science teaching, language and the difficulty to learn these sciences. The aim of this bachelor thesis was an attempt to increase the transparency of analytical methods in practical chemistry teaching through sensory analysis methods. Building on previous work addressing this issue, further experimental activities were designed and piloted. These activities give the possibility to increase first of all the interest and motivation of the students in chemistry, then to lead the students to think on their own, to find new solutions, to be able to work with the instruments within the analytical methods and to verify and compare the results of the measurements. The activities have been validated on chemistry teacher education students and are included in the practical part divided into sensory and instrumental parts. The...
|
|
|
Sports Doping and Chemistry Education
Kubátová, Karolína ; Bílek, Martin (advisor) ; Kolář, Karel (referee)
The bachelor thesis deals with the issue of doping in sports and the possibility of including this topic in teaching chemistry at elementary school and grammar school. The theoretical part focuses on explaining the concept of doping, describing the prohibited methods, and dividing the chemical substances into groups according to the categories of doping. For each group, examples of substances are given, including their effects on the human body. Part of the theoretical background is also a description of the course of doping control, and everything related to it. The bachelor thesis also includes a chapter that presents available information materials related to the issue of sports doping. The practical part is focused on the analysis of curricular documents of elementary schools and grammar schools, including those with a sports focus, with the regaboutsibility of including doping teaching in theoretical and practical chemistry. The analysis is extended to the subjects of natural history and/or biology, health education, civics and/or basics of social sciences, and physical education. Finally, an interview with the Anti-Doping Committee of the Czech Republic is summarized and the thesis ends with a description of prepared educational activities on the topic of Sports Doping with an emphasis on...
|
|
|
History of Chemistry Production in the Czech Republic Territory
Grassinger, Tomáš ; Rusek, Martin (advisor) ; Kolář, Karel (referee)
This thesis deals with the chemical production and its history in the Czech Republic. The chemical production has its long tradition in the Czech Republic. In the first chapter the thesis focuses on the topic of the chemical production in the national curriculum and selected school curriculums in the Chrudim region and the Pardubice region. In the second chapter it analyses the production of various chemicals described in the present and former elementary school textbooks of Chemistry. It also concerns historical Chemistry textbooks published since the year 1945 in which other facts that are not being included in the present textbooks are mentioned and enlarge the synthesis. The history of the notable and traditional chemical production in the Czech Republic is the component of this thesis in the third chapter. This thesis summarizes all the facts concerning the chemical production so that it could be used by teachers and students who are interested in studying the subject of Chemistry. KEYWORDS chemical production, history of chemicals, national curriculum, school curriculum, textbooks for elementary schools
|
guest ::
RSS feed.