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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
71

Vývoj nových typů kompozitů pro sanace betonů se zvýšenou ochranou výztuže / Development of new types of composites for concrete rehabilitation with increased protection reinforcement

Taranza, Luboš January 2017 (has links)
Around the world there is a great number of reinforced concrete structures, who´s life cycle, for which they were designed, is significantly shortened due to action of various aggressive environments, or due to defects created during the construction process. (i.e. insufficient steel reinforcement cover depth). One of the most common causes of problems in reinforced concrete structures is corrosion of steel reinforcement. It is necessary to repair structures degraded in this fashion and return them to their original state. We made a unique polymercement concrete repair system was developed with value added. Corrosion inhibitors, including the newly developed, are implemented into its polymercement matrix, which significantly limit the corrosive processes in all new materials. The principle of proposed solution is application of repair system on a corrosion damaged structure, and then the active substances in the repair material will penetrate into substrate concrete and protect corroded steel reinforcement. Another value added is the application of recycled raw materials into the proposed materials, which has indisputable environmental effect and simultaneously allows for improvement of some properties of the repair materials. Further was developed a new method for detecting corrosion inhibitors in concrete.
72

Vliv diversity mikrobiálního společenstva na dekomposici organické hmoty / Influence of microbial community diversity on the decomposition of organic matter

Vicena, Jakub January 2016 (has links)
Microbial diversity plays an important role in the decomposition of soil organic matter. However, the drivers of this dependence still remain unclear. The work is based on long-term monitoring of soils of different successional stages of different diversity. Soil sampling was conducted on two dumps after brown coal mining in the Sokolov. Soils were X ray sterilized and inoculated by inoculum from both soils in two inoculation density which create gradient of microbial diversity. Then microbial respiration was measured in either supplied or not supplied by litter of Calamagrostis epigejos. Results showed a strong positive correlation between the microbial diversity and decomposition of organic matter if the microbial community is limited by available carbon. If there isn't carbon limit available, the decomposition rate is controlled by the amount of microbial biomass. Results demonstrated positive correlation between the rate of decomposition and the amount of fungal biomass. The soils with the addition of leaf litter showed priming effect in the initial stage of decomposition. In the control samples without addition of litter priming effect wasn't observed. Increasing humidity led to increase of decomposition rate. We can conclude with a clear conscience that similarly conclusive results associated...
73

Frakcionace biodegradabilní části komunálního odpadu k výrobě bioplynu a k výrobě pevného biopaliva / Fractionation of biodegradable municipal waste to produce biogas and solid biofuels production

VELEK, Jindřich January 2015 (has links)
The theses deals with the use of biologically degradable waste which needs to be processed and utilized in maximum amount. It is highly desirable to apply new and well-known technologies to treat such waste efficiently and not to dispose it in landfills unreasonably, as is the case at present. The paper describes landfilling, composting, anearobic digestion, mechanical and biological treatment of waste as well as various stages of the lability concerning fractions of organic compounds. The stages of the lability concerning fractions of organic compounds are in particular determining the best utilization of such biologically degradable waste in each technology. It is advisable in this case to apply the STEAM EXPOLOSTION or IFBB technology for treatment of biologically degradable waste. These technologies were used in the proposal for the utility model which specifies how to produce biogas or solid biofuel from waste.
74

Kostní remodelace u revmatických onemocnění: Ztráta kosti u pacientů s juvenilní idiopatickou artritidou. / Bone remodeling in rheumatic diseases: Bone loss in juvenile idiopathic arthritis

Brábníková Marešová, Kristýna January 2015 (has links)
Introduction: The inflammation plays the essential role in the bone loss in juvenile idiopathic arthritis (JIA). Proinflammatory cytokines and also glucocorticoids (GCs) may activate bone resorption by osteoclasts. Simultaneously, bone formation can be attenuated, especially by inhibitors of proteins, which control the osteoblast differentiation. The aim was to verify the hypothesis that in patients with highly active JIA, reduction of bone formation via Wingless (Wnt) proteins inhibitors - Dickkopf 1 (Dkk-1) and sclerostin could be found. Except the densitometry measurements of bone and lean mass, we assessed markers of disease activity, bone metabolism and remodeling in young adult patients with JIA before and during 2 years of anti TNFα (tumour necrosis factor α) treatment, which decreases disease activity. Results: In patients with JIA before antiTNFα treatment, bone mineral density (BMD, g/cmš) was significantly reduced compared to controls. Values of BMD and body composition in JIA significantly depended on disease duration and GCs treatment. Serum concentration of sclerostin was significantly elevated in JIA compared to values in healthy controls. Values of the other monitored markers did not differ between JIA and controls. In patients with JIA, Dkk-1 correlated positively with C-reactive...
75

Podnikatelský plán pro založení vlastní firmy v oblasti maloobchodního prodeje barev, laků a nátěrových hmot / The Business Plan for Starting Own Business in the Retail Sale of Paints, Varnishes and Coating Compositions

Vítek, Ondřej January 2016 (has links)
This thesis was written up as a proposal for business activities in field of retail sale of paints, lacquers and varnishes. The business activity will be realised according to this activity as self-employed trade and non-profit organization will be used as auspices. At the time of writing this thesis market analysis has been performed by self-employed trader via trial opening of the shop. This shop opening provided useful information for business plan proposal.
76

Charakteristika snímků z rastrovacího transmisního elektronového mikroskopu tenkých biologických řezů / Characterization of scanning transmission electron microscopy images of thin biological sections

Novotná, Veronika January 2014 (has links)
Diplomová práce popisuje fyzikální principy mikroskopů TEM, SEM a STEM spolu s jejich vhodností pro pozorování vzorků citlivých na elektrony, jako jsou zalévací média či biologické vzorky. Dále je popsána příprava vzorků pro STEM (TEM) a popis interakcí, ke kterým dochází mezi primárním elektronovým svazkem a vzorkem. Součástí práce je také pojednání o zpracování mikroskopických obrazů s podkapitolou o metodách kvantitativního porovnání obrazů ze STEM. Praktická část práce je zaměřena zejména na měření úbytku hmoty zalévacích médií (Epon, Spurr, LR White) způsobený primárním svazkem elektronů v nízkonapěťovém STEM. Ultratenké řezy několika tlouštěk byly zkoumány při různých nastaveních mikroskopu (urychlovací napětí, celková dávka, proud svazku, čištění povrchu vzorku a komory mikroskopu) a zobrazovacích módech (světlé a tmavé pole). Dále jsou zkoumány také biologické vzorky Krásnoočka štíhlého (Euglena gracilis) zalitého v pryskyřicích Epon a Spurr. Nasbírané snímky, vytvořené algoritmy a získané výsledky jsou diskutovány a zhodnoceny.
77

Návrh na rozšíření firmy o veřejnou čerpací stanici pohonných hmot / Proposal of a Company Expansion by a Fuel and Oil Station

Holcmanová, Eva January 2012 (has links)
The aim of this diploma thesis is to draw up a business plan regarding an extension of an existing car repair service by adding a public fuel filling station to it. The public fuel filling station will be built directly within the area of the existing car repair service located in the village of Jemnice, in the district of Žďár nad Sázavou. The theoretical part generally describes the business activity, possible forms of business and individual analyses used in this diploma thesis. The second part briefly describes the chosen company, for which the above mentioned draft of the businnes plan is intended. The last part of the diploma thesis presents the actual construction plan of the public fuel filling station based on the elaborated analyses, including the time schedule of the execution.
78

Nové typy kompozitů pro sanaci stavebních konstrukcí s důrazem na zvýšení korozní odolnosti výztuže / New types of composites for rehabilitation of building structures with emphasis on increasing the corrosion resistance of reinforcement

Dražil, Luboš January 2013 (has links)
This thesis is dedicated to the degradation of reinforced concrete structures, their causes and consequences of the waveforms. This thesis describes how the protection of concrete structures against these negative effects. The practical part of the work was focused on the development of new types of repair materials with added value in the form of corrosion inhibitor. In this part of the work was done adhesive bridge and development of repair materials for hand and machine application.
79

Problematika výroby nového popílkového pórobetonu / The issue of new fly ash aerated concrete production

Bednárik, Vít January 2014 (has links)
The master´s thesis deals with the possibility of laboratory verification of the influence of feedstock character, especially lime and fly ash, on quality of fly ash aerated concrete. The experimental study involves taking a series of samples autoclaved and non-autoclaved aerated concrete during two pilot plant verification in the factory. After removal of autoclaved and non-autoclaved aerated concrete samples they were tested and compared with results of non-autoclaved aerated concrete produced in the laboratory. Methodology of comparison technologically-produced autoclaved aerated concrete and laboratory-produced non-autoclaved aerated concrete was designed based on achieved findings.
80

Volba vhodného systému vytvrzování pro práškové nátěrové hmoty / The Choice of the Suitable Hardening Solution for Powder Coating

Donabauer, Petr January 2013 (has links)
The thesis deals with the comparison and selection of a suitable system of curing powder coatings. The work includes a literature review focused on the issue of powder coating. In the experimental part of the work will be carried out techno-economic analysis of the suitability of each technology for curing parts in a conventional and catalytic infrared oven.

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