|
|
Synthesis of ceramic materials based on Ca-Co-O system
Žáková, Kateřina ; Švec, Jiří (referee) ; Bartoníčková, Eva (advisor)
In this work synthesis of structure cobaltites based on Ca-Co-O system is discussed. As major way of synthesis was chosen citric acid method. The document is devided into theoretical and experimental part and also into discussion of observed results. Main focus of literary research is general utilization and function of thermoelectric materials, related thermoeletric effects according to structural defects in crystals. Also topic of cobaltite ceramics is described. Due to the fact that calcium-cobalt oxides are conductive, their use is point of interest in high-temperature and energy applications. During experiments differential thermal and thermogravimetric analysis (TG-DTA), X-Ray diffraction, heat microscopy and scanning electron microscopy were used.
|
|
| |
|
|
Optimization of kaoline flocculation process
Kurťák, Marek ; Švec, Jiří (referee) ; Šoukal, František (advisor)
The bachelor thesis deals with flocculation of Karlove Vary area kaolin raw materials, their sedimentation rate and correlation of the flocculation, and sedimentation properties with composition of a particular material. The research was composed of sedimentation rate monitoring, execution of COD test, and subjecting the materials emission spectrometry with inductively coupled plasma, ion chromatography and roentgen diffraction.
|
|
|
Possibilities of utilization of brick-grind-dust in alternative binding systems based on fluidized ash
Tušla, Václav ; Švec, Jiří (referee) ; Opravil, Tomáš (advisor)
This bachelor´s thesis deals with usage of brick-grind-dust in alternative binding systems based on ashes of fluid combustion. Specifically it deals with fly ashes and softly milled bed ashes of brown coal combustion. Primarily thanks of content of free lime, anhydrite and other components, fluid ashes have binding properities. Brick-grind-dust arise in end formation of burned bricks. The aim of thesis is to verify, possibilities to create composite of appropriate abilities with high or even exclusive amount of fluid ashes and brick-grind-waste. The paper also deals with influence of some chemical modifying additive on this alternative systems.
|
|
|
New markers of colon cancer evolution in ulcerative colitis
Švec, Jiří ; Kment, Milan (advisor) ; Keil, Radan (referee) ; Hampl, Aleš (referee)
Background: Long-standing ulcerative colitis (UC) has an increased risk of evolving into colorectal cancer (CRC) and upregulated expression of cyclooxygenase 2 (COX-2), inducible nitric oxide synthase (iNOS), survivin, telomerase catalytic subunit (TERT), integrin-linked kinase (ILK) and transcription factors c- MYB and TCF-4, has been implicated in the development and progression of sporadic colorectal cancer. Nevertheless much less is known about their role in the process of UC-associated colon carcinogenesis. Methods: We analyzed the gene expression of these markers during the transition of colonic mucosa from chronic inflammation to epithelial neoplasia in biopsies of UC patients using quantitative real-time polymerase chain reaction and immunohistochemistry, and compared the expression profiles of this gene panel in samples of patients with CRC and in human tumor xenografts of SW620 malignant colonic cells. Additionally, we determined the expression of these genes in mouse models of sporadic and colitis-associated CRC in A/J and ICR mouse strains using quantitative RT-PCR and laser microdissection. Results: The transcript levels of survivin, c-MYB, COX-2, iNOS, and TCF-4 showed statistically significant increase during neoplastic transformation of UC-patient colonic mucosa, whereas TERT and ILK...
|
|
|
The Feasibility Study of a New Company Creation
Švec, Jiří ; Chyťová, Monika (referee) ; Koráb, Vojtěch (advisor)
This masters’s thesis deals with a feasibility study of new company creation. The company would be active in the area of online ticket sales for small-time cultural events. Suggestions for a solution relating to the enterprise and enabling the company to optimally entry to the market are presented, based on theoretical knowledge, empirical facts and analysis.
|
|
|
The Proposal of Business Plan
Soudek, Lukáš ; Švec, Jiří (referee) ; Bayerová, Vladimíra (advisor)
The subject of this report is establishing a specialized retail shop in Brno. I hold forth on analysis of a market, competition and customers in this work. In the point of view from the following subjects I have created the marketing and financial plan which is very needful for this kind of business activity which I have chosen.
|
|
|
Evaluation of properties of lime mortars
Babíková, Barbora ; Švec, Jiří (referee) ; Opravil, Tomáš (advisor)
This bachelor thesis deals with evaluation of properties of lime mortars and their application in field of restoration and preservation of cultural heritage. The aim of this works is to compile evaluation line of different types of lime mortars based on comparison of their behavior during testing of their characteristic properties and resistance. Studied properties like setting time, compressive strength, tensile strength in bending, frost resistance, reactivity, content of free lime, loss of mass on ignition, point to applicability of given mortar in different interior or exterior conditions. The results of individual tests are further processed and evaluated.
|
|
|
Phosphate Binders in Refractory Application
Švec, Jiří ; Drábik, Milan (referee) ; Lang, Karel (referee) ; Havlica, Jaromír (advisor)
The doctoral thesis is focused on the study, research and development of refractories with phosphate bonding. Primary motivation is preparation of phosphate-based binders that can be applied for non-shaped insulating material fabricated by “in situ” foaming. The phosphate binders based on Al2O3-H3PO4 system are one of the most common in refractory technology. The amphoteric nature of the aluminium and its oxides require the setting of Al2O3-H3PO4 binders under the higher temperatures. Application of higher temperatures is necessary to obtain the minimal manipulation strength of as-prepared green bodies. The main goal of the work is preparation of ytrium phosphate-based binders via different preparation techniques. Yttrium based binders would allow phosphate refractory preparation by standard way, i.e via reaction between binder and reactive aggregate, without structural disintegration of foamed material even before getting manipulation strength or the final firing procedure. Yttrium is more basic than aluminium and therefore more reactive in Y2O3-H3PO4 system.. Yttrium oxide is highly refractory material and sintered yttrium monophosphate has excellent properties from the thermal and corrosive stability point of view. This fact should compensate higher price of this material. Experimental part of this work studies the possibilities of binders preparation in Y2O3-H3PO4 system. The mixtures were designed to prepare binding phase Y(H2PO4)3. Products of these reactions were characterized in phase and chemical point of view. In order to study and describe setting and hardening processes of phosphate binders, the products were “in situ” analyzed by the thermal analyses and high-temperature diffraction analysis up to the 1300 °C. High temperature products were then characterized by means of phase and chemical composition and morphology.
|
|
|
Proposal of Marketing Strategy
Soudek, Lukáš ; Švec, Jiří (referee) ; Němeček, Petr (advisor)
Subject of this thesis is the proposal of marketing strategy of the SUBFORM company. For thos purpose was chosen the SUBFORM company. This thesis includes theoretic piece of knowledge, company and market analysis. Using the data obtained by this analysis, I suggested the most suitable marketing strategy leading to affirming the company on this market.
|
guest ::
RSS feed.