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Orgonophosphorus analogues of triphosphate
Šrein, Jakub ; Kubíček, Vojtěch (advisor) ; Štěpnička, Petr (referee)
Two substances were prepared in this work, both with PCPCP structure motif. The motif is similar to ATP molecule, although the oxygen bridges are replaced with methylene groups. Both compounds were characterized by mass spectrometry and NMR spectroscopy. Since bis(methylenephosphonato)phosphinate is soluble in water, four pKa values were determined. Both prepared compounds have potential to serve as chelating ligands. Powered by TCPDF (www.tcpdf.org)
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Analyze of the selection tests in dogs
Kadlecová, Irena ; Chaloupková, Helena (advisor) ; Hradecká, Lenka (referee)
The aim of the diploma thesis is to assess and analyse the value of the character test in general, both in the Czech Republic and Sweden. Their quality to reveal the real personality, emotional stability, fear reactivity and aggressive reactions. Czech character test is required as a condition for breeding for both Belgian and Australian shepherds by the Belgian Shepherd Club of Czech Republic. The aim of the analysis is to measure the differences between the tasks and the results of the Czech character test and highly-developed Swedish Mental test that reveals the character in a more complex way and is generally more demanding also from time management side. Furthermore the analysis explores the possible relation between the results of the character tests and trial performance in dogs undergoing this research.
The testing ran in three terms, while both tests were conducted in a single day for each participant. The target group were owners of Belgian and Australian shepherds with dogs between 1 to 4 years old. The total number of tested dogs is 17. The Swedish test proved higher connectivity of the tasks (high correlations) as wells as higher results variability between tested animals as opposite of the Czech test.
The results of this pilot project study did not show any connection between the high score in the test and higher probability of passing the working exam, although this result can be influenced by low number of animals tested and their lower age.
This study works as pilot applied research to increase the effectivity and simplify the testing of working dogs, however, it is essential for next stages of research to focus on concrete parts of the test and their connectivity to the dog behaviour in a given situation.
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Investigation of Nuclear Power-Reactor Core Poisoning
Janošek, Radek ; ČR,, Milan Štefánik, Ústav jaderné fyziky AV (referee) ; Katovský, Karel (advisor)
The aim of this Bachelor´s Thesis is to characterize fundamental transient processes, which takes place in nuclear power-reactor. The main goal is the theoretical analysis of these processes, which include xenon poisoning, samarium poisoning, xenon after shutdown, xenon oscillation, and permanent poisoning. A significant part of the thesis deal with the simulation of xenon poisoning and samarium poisoning. Model was created using Maple software. One of the other points is to state the basic concepts of nuclear physics and also to describe nuclear power-reactor primary operating processes.
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Evaluation of lime properties
Palušáková, Stanislava ; Beranová, Denisa (referee) ; Opravil, Tomáš (advisor)
This thesis deals with the evaluation of the properties of limes, which are used in the field of heritage preservation of monuments, but also for common construction applications. The aim of this thesis is to draw up the appropriate set of analyzes that suffice the necessary minimum for the evaluated characteristics of air limes. Based on the results obtained in this set it will be characterized analysed lime and recommended it for a specific application. For simple solution of this work we have to deal with using traditional commercially available lime CL 90, CL80 and CL70. Selection of appropriate characteristic analysis was based on CSN EN 459.
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New Methods of Study of Reactivity and Transport Properties of Biocolloids
Smilek, Jiří ; Weidlich,, Tomáš (referee) ; Pabst, Willi (referee) ; Klučáková, Martina (advisor)
The main aim of doctoral thesis was the study on reactivity, transport and barrier properties of biocolloidal and synthetic polymeric substances by simple diffusion techniques. It was studied mainly the influence of basic physic-chemical parameters (temperature, concentration, pH and modification of material) on the reactivity and barrier ability of chosen compounds. Further substances were chosen as a model compounds: biocolloids (humic acids, alginate, chitosan, hyaluronate) and synthetic polymer (polystyrenesulfonate). Reactivity, barrier and transport properties of chosen substances were studied by interactions with oppositely charged basic organic dyes (methylene blue, rhodamine 6G, amido black 10B respectively) in hydrogels medium based on linear polysaccharide (agarose). The attention was also paid to basic physic-chemical characterisation (infrared spectroscopy, rheology, elemental analysis, thermogravimetry and scanning electron microscopy) of chosen materials and also hydrogels. Key part of the whole doctoral thesis was the optimization of selected diffusion techniques (diffusion cell technique and non-stationary diffusion in cuvettes) designated for the study on reactivity and barrier properties of wide range compounds (optimized method should be used as an universal method for simple and fast determination of reactivity of different compounds at given or changing conditions). The rate of reactivity, transport and barrier properties was determined based on fundamental diffusion parameters such as diffusion coefficients, break-through time so called lag time, interfacial concentration of chosen organic dye, apparent equilibrium constant, tortuosity factor, partition coefficient.
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Spectrometric Methods for Research of Humic Substances
Enev, Vojtěch ; Maršálek, Roman (referee) ; Sýkorová, Ivana (referee) ; Klučáková, Martina (advisor)
The main aim of doctoral thesis is the study on physicochemical properties of humic substances (HS) by modern instrumental techniques. The subject of the study were HS isolated from South Moravian lignite, South Bohemian peat, forest soil Humic Podzol and finally extract from brown sea algae Ascophyllum nodosum. With respect on determination of structure and reactivity of these unique “biocolloids”, standard samples (Leonardite HA, Elliott Soil HS and Pahokee Peat HS) were also studied. These samples were obtained from International Humic Substances Society (IHSS). All mentioned substances were characterized by elemental analysis (EA), molecular absorption spectroscopy in ultraviolet and visible region (UV/Vis), infrared spectroscopy with Fourier transformation (FTIR), nuclear magnetic resonance spectroscopy of carbon isotope 13C (LS 13C NMR), steady-state and time resolved fluorescence spectroscopy. Obtained fluorescence, UV/Vis and 13C NMR spectra were used for calculation of fluorescence and absorption indexes, values of specific absorbance and structural parameters respectively, which were used for fundamental characterization of these “biocolloidal” compounds. Infrared spectroscopy with Fourier transformation was utilized for the identification of functional groups and structural units of HS. Evaluation of infrared spectra is quiet complicated by overlapping of absorption bands especially in fingerprint region. This problem was overcome by Fourier self-deconvolution (FSD). Steady-state fluorescence spectroscopy was used for deeper characterization of HS with respect to origin, structural units, amount of substituents with electron-donor and electron-acceptor effects, content of reactive functional groups, “molecular” heterogeneity, the degree of humification, etc. Parameters of complexation of samples Elliott Soil with heavy metal ions (Cu2+, Pb2+ and Hg2+) were obtained by using modified Stern-Volmer equation. These ions were chosen purposefully, because the interaction of HS with these ions is one of the fundamental criteria for the assessment of the reactivity of HS. Key part of the whole doctoral thesis is time-resolved fluorescence spectroscopy. It is able to determine the origin of emission of HS by method Time-Resolved Area Normalized Emission Spectra (TRANES). The viscosity of micro medium about excited fluorophores of HS was determined by Time-Resolved Emission Spectra (TRES).
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Study on reactivity of humic acids via method of diffusion cells
Hrubá, Pavla ; Weidlich,, Tomáš (referee) ; Sedláček, Petr (advisor)
The diploma thesis focuses on utilization of diffusion cells in reactivity mapping study on humic acids. In the experimental part, samples 6 humic acids of different origin or chemical modification were studied. All the samples were characterized by basic analytical and physico-chemical methods (elemental analysis, thermogravimetry, determination of acidity, spectrometry). Methylene blue was utilized as a model reactive probe and agarose gel as an inert support medium. An effect of interactions between humic acids and methylene blue on diffusivity of the dye in the hydrogel was determined and discussed.
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Influence of pH and ionic strength on barrier abilities of humic substances
Přítulová, Marie ; Kratochvílová, Romana (referee) ; Klučáková, Martina (advisor)
The main aim of this bachelor thesis is the study of humic acids and their barrier properties. The reactivity of humic acids was studied by simple laboratory diffusion techniques in plastic diffusion cells. This thesis is mainly focused on the through-diffusion processes in hydrogel media. Hydrogel media were based on the thermoreversible polysaccharide (agarose) with or without addition of humic acids. The rate of reactivity of humic acids was compared by the interactions with organic cationic dye – methylene blue. The influence of ionic strength and pH was tested as well.
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Study on Reactivity of Cationic Biopolymer by Simple Diffusion Techniques
Tesařová, Barbora ; Kalina, Michal (referee) ; Smilek, Jiří (advisor)
This bachelor thesis is focused on study of chitosan reactivity by simple diffusion processes realized in hydrogel media based on agarose. Mechanical properties studied by oscilatory measurements and the pore size were determined at agarose gels with the addition of chitosan as the main parameters influenced the transport properties. The main goal of this work is the investigation the reactivity of chitosan. Agarose is used only as a supporting matrix for the formation of a hydrogel. The state of the art is aimed primarily on the study of chitosan reactivity based on already published scientific papers.
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