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Advanced ceramics for tissue engineering
Vojtíšek, Jan ; Koplík, Jan (referee) ; Bartoníčková, Eva (advisor)
This bachelor´s thesis deals issues of ceramics materials suitable for tissue engineering. An artificial substitute for human tissue can be divided to several generations. This include inert, bioactive and bioresobable materials. Resorbable substitutions are prepared from materials, which could substitute host tissue, for example hydroxyapatite. HA can be prepared in different ways (dry and wet way). To better application in medicine, ceramics foams prepared by in situ foaming or replication technique are using. Experimental part of this paper deals preparing of hydroxyapatite powder and process optimization. Samples was characterized by IR and Raman spectrometry, XRD analysis and particle size was studied by SEM. Ceramics foams was prepared by in situ foaming from Al2O3, HA and composites (in ratio 50 – 50, 75 – 25, 90 – 10). Porosity was evaluated by stereomicroscope, density and level of sintering was studied by SEM microscopy.
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Effect of environment on the photocatalytic properties of copper oxides
Šmatlo, Filip ; Vaněk, Jiří (referee) ; Vanýsek, Petr (advisor)
V této práci byl popsán princip fotokatalýzy. Práce se soustřeďuje na kovové oxidy, které mají široké využití ve fotokatalytických aplikacích. Bylo také popsáno různé použití fotokatalytických materiálů. Tato práce se zaměřuje zejména na využití fotokatalytických materiálů pro rozklad organických vodu znečisťujících látek. Popsaný fotokatalyzátor je oxid měďný, který má velmi dobré vlastnosti pro rozklad organických látek pomocí fotokatalýzy. Schopnost rozkladu organických látek oxidu měďného byla popsána na rozkladu organického barviva methylová oranž.
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Functionalization of gold nanoparticles for imaging
Jakubechová, Jana ; Pekárková, Jana (referee) ; Drbohlavová, Jana (advisor)
The diploma thesis deals with synthesis of gold nanoparticles and their surface functionalization suitable for in vitro imaging. In this view there are requirements for optical properties such as stability, monodispersity and no presence of cytotocxicity. In order to fulfill these demands the synthesis by Turkevich method with surface modification by glutathione and polytethylenglycol was performed. Analytical methods such as DLS, SEM and Zeta potential measurement were utilized to characterize the physical and chemical properties of synthesized gold nanoparticles. Finally, MTT assay was performed to evaluate toxicity of gold nanoparticles using HEK 293 cell line.
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Network Configuration Synthesis and Verification
Černeková, Alžbeta ; Veselý, Vladimír (referee) ; Ryšavý, Ondřej (advisor)
The subject of this master's thesis is to address the topic of network devices configuring. It resolves the problems related to simplifying certain parts of configuration while eliminating frequent errors or issues. It introduces a solution to setting of IP addresses on router's interfaces. Furthermore it presents the generation of configuration for particular dynamic routing scenarios and its application and methods for its verification on network devices. It also demonstrates the preparation of configuration of VPN tunnel between two devices. The conclusion of this thesis contains possibilities for further extensions or improvements.
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Preparation and characterization of poly-3-hydroxybutyrate copolymers
Kolomazník, Vít ; Kupka, Vojtěch (referee) ; Porubský, Tomáš (advisor)
This thesis evaluates the synthesis of copolymers based on poly-3-hydroxybutyrate (PHB). The goal is to create a material with the highest possible concetration of PHB with the smallest possible volume of crystal phase. PHB with lower molecular weight and hydroxyl end groups used for polyurethane synthesis was prepared by alcoholysis of PHB polymer with 1,4 butanediol. Polyethylene glycole (PEG) of various molar mass and ratio values was chosen in this thesis as a second reacting substance. Another substance used for copolymeration with PHB was the poly(butylene adipate-co-terephthalate) PBAT. Both variants used hexamethylenediisocyanate (HDI) as a non-toxic bonding agent. From these substances, a block copolymers comprised of soft and hard segments were formed. Hard segments are a result of PHB and it‘s crystalic structure. Soft segmets are comprised of PEG or PBAT macromolecules. The influence of soft segments of various length and molar ratio of reactants on overal polyurethane properties was evaluated. Prepared materials were charactrerized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and infrared spectroscopy (FTIR). Molecular weight was measured by gel permeation chromatography (GPC).
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Synthesis of core/shell quantum dots for diagnostics
Mihajlović, Ana ; Vaculovičová, Markéta (referee) ; Pekárková, Jana (advisor)
This thesis deals with biosensors based on modified semiconductor core/shell quantum dots (QDs) for diagnosis. The work is divided into four main parts. The first one discusses the theory required for the use of QDs in bioaplications, there are described methods of synthesis, modification, application and bioconjugation of QDs. In the experimental part, CdTe/ZnS QDs with core/shell structure were prepared, in which the core was modified by MPA, GSH and TGA. In the next step, these QDs were further modified using CDI, EDC and NHS as mediators in order to increase affinity to BSA (bovine serum albumine) and IgG (imunoglobuline G). Prepared conjugates were characterized by fluorescence spectroscopy (Infinite M200Pro, Tecan) and capillary electrophoresis (Agilent 7100).
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Synthesis of Lanthanidocene Based Compounds
Pospíšek, Marek ; Zmrzlý, Martin (referee) ; Richtera, Lukáš (advisor)
The aim of this bachelor thesis is to summarize the issues of the polymerization catalytic systems based on lanthanidocene complexes. These complexes are subsequently divided by the structure into four basic groups. One part of this work deals with an overview of the most interesting results of the catalytic systems, which are then analyzed and assessed either in its entirety or point of view of catalytic activity, living mechanism of polymerisation and stereo or regioselectivity. The focus is also placed on type of monomers or the conditions of polymerization. In this part of thesis are also described general methods for their synthesis. Found analogies and generalization are commented from the point of view of the design of the catalytic systems for the purpose of choosing the stereo or regioselectivity, molar mass and its distribution. This gives significance to these complexes as catalytic systems for obtaining the required polymer properties. The acquired knowledge is used for the theoretical design of the catalytic system for controlled polymerization.
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Remote Nature
Richtr, Pavel ; Suchánek, Jiří (referee) ; Krekovič, Slavomír (advisor)
In my thesis I deal with the interactivity between the weather and the virtual model, whose main output is sound. I'm trying to create generative installation where reacts virtua oraganism with real environment and generates signals that can be interpreted in a sound to explore the aesthetic relations of that connection.
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Musical Signal Synthesis on Android
Mikulík, Jan ; Glembek, Ondřej (referee) ; Černocký, Jan (advisor)
The main task of this thesis is to design and implement new synthesizer on mobile platform under Android. The synthesizer generates three types of signals - sine, sawtooth and square. Two types of filters can be applied, low pass and high pass, and their cut-off frequency can be controlled. For the sound interpretation, an AudioTrack API was used. The synthesizer is controlled by zones, where one zone equals one tone. Zones can be selected by the user. For this synthesizer, a simple user interface was created.
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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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