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Modification of polyurethane by biodegradable poly(hydroxybutyrate)
Kupka, Vojtěch ; Žídek, Jan (referee) ; Vojtová, Lucy (advisor)
Cílem předložené bakalářské práce byla syntéza elastomerního polyuretanu plněného biodegradabilním polyhydroxybutyrátem. Vzorky byly podrobeny analýze morfologie pomocí rastrovací elektronové mikroskopie, mechanické vlastnosti byly testovány jednoosou tahovou zkouškou. Práce se taktéž zabývá předpovědí mechanických vlastností na základě teorií kaučukové elasticity. Bylo zjištěno, že výsledný materiál je částicový kompozit, kde se vzrůstajícím hmotnostním obsahem plniva v materiálu vzrůstá modul pružnosti. Predikce tahových křivek pomocí softwaru SEC.exe ukazovala pro reálný průběh křivky nereálné hodnoty hustot polymerních řetězců. U modelů, které vykazovaly reálné hodnoty hustot, byly naopak hodnoty napětí vyšší, než ve skutečnosti naměřené.
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Synthesis of [n]Phenacenes
Jakubík, Pavel ; Církva, Vladimír ; Storch, Jan
The goal of this work was to develop a multigram scale photochemical syntesis of [n]phenacenes and their derivatives from stilbene-type precursors. Vast effort was made to examine [n]phenacenes-based organic P-type semicondutors in the past. This work is also focused on an introduction of electron-acceptor substituents (fluorine, nitrogen) into or onto phenacene skeleton. The proper choice of substitutions can lead to change in semiconductivity of [n]phenacenes so their properties could be easily modulated.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22015011213301 - PDF
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Strategic Analysis of an Enterprise
Pevný, Robert ; Kovář, František (advisor) ; Martínek, Zdeněk (referee)
This diploma thesis deals with the strategic analysis of Skoda Auto a. s. and its current strategy. Also, it deals with verifying of given hypotheses to effectively determine the future operational strategy. The first part is the theoretical and methodological, which explains the key concepts of strategic analysis of a company. It's followed by the practical part, which translates the theory of strategic analysis into the practice, analyzes modern trends and via the synthesis method it achieves the objective of this thesis: to specify strategic recommendations for Skoda Auto and to verify the hypotheses specified in the beginning.
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Design and Synthesis of Helicene like Molecules
Bernard, Martin ; Sýkora, Jan ; Storch, Jan
Azahelicenes are unique inherently chiral three-dimensional aromatic compounds with high potential in homogenous assymetric catalysis. Their synthesis has many drawbacks and cannot be done in multigram scale so far. Recently, we have developed a route to new type of helicene-like molecules II. Multigram-scale synthesis of model compound where two benzene rings in [6]helicene skeleton are replaced by cyclopentadiene rings was accomplished in three steps. Such molecules have helical structure similar to helicenes, however, lower racemization barrier. Appropriately modified aza-analogues could be suitable catalysts for asymmetric reactions. Therefore, our synthetic approach leading to these compounds will be discussed.
Fulltext: content.csg - PDF
Plný tet: 20120415230504 - PDF
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Laterna magika - Enrichment of Aesthetic Perception?
PEKÁREK, Josef
The aim of the bachelor thesis is, on the basis of the analysis of film and theatre state in 50s of the 20. century both in Czechoslovakia and in the world, establish the basis and influences for the establishment of Laterna Magika. The relating task is, through possibilities of film and theatre, determined the boundaries of these different types of art and find out in what relationship they are or could be under the terms of Laterna Magika performance. The results of this theoretical part will confront subsequently with the analysis of selected Laterna Magika performances.
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Carbosilane Dendrimers and Their Application in Catalysis
Krupková, Alena
his review summarizes the advances in synthesis, modification and utilization of carbosilane dendrimers with emphasis on their application in catalysis. Dendrimers with different cores, branching structure and functionality of end groups but containing only carbon and silicon atoms in their skeleton are considered. Dendrimers of this type are generally characterized by their excellent thermal and chemical stability together with high reactivity of end groups and versatility of their structure, which determines their large application potential.
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