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Relationship between petrographic parameters and technological properties of clastic sedimentary rocks used for crushed stone
Čermák, Martin ; Přikryl, Richard (advisor) ; Krutilová, Kateřina (referee)
This diploma thesis is focused on the finding and describing of the relationships between petrological parameters and technological properties of rocks used for the production of aggregates (crushed stone). Rock specimens were selected from a geological area of Culm (Lower Carboniferous age) in the area of Nízký Jeseník Mts. and Drahanská vrchovina uplands in the Czech Republic. Studied localities were selected on the basis of the current quarrying operations and also to represent the different strata. The six studied localities encompass Kobylí, Chabičov, and Bělkovice where Horní Benešov formation of Nízký Jeseník is exposed. Locality Valšov represents Andělské Hory formation and locality Nová Ves and Loštice represent Protivanov formation of Drahanská vrchovina uplands. Two specimens were taken from the locality Loštice (one from the second cut because there are produced low-grade aggregates and the third cut where high quality crushed stone is produced). A detailed mineralogical-petrographic examination of the samples was the first step, in an attempt to obtain their mineralogical composition and to identify the major rock-forming clasts. Thin sections were examined by standard polarizing microscopy. The auxiliary UV lamp and thin sections saturated by fluorescent substance were used for the...
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Influence of chemical composition of steel on structure and properties of stainless steels
Valenta, Pavel ; Čech, Jan (referee) ; Záděra, Antonín (advisor)
The thesis is focused on high-alloy austenitic and austenitic-ferritic (duplex) steel. The theoretical part includes research about high-alloy steels and basic introduction to this issue. In the practical part of the test there were casted refractory austenitic steel 30CH3N17G2L, duplex stainless steel 1.4462, low carbon steel and high carbon steel. On the castings of austenitic steel were made mechanical and technological tests. There were evaluated the effects of different casting temperature and casting wall thickness to the microstructures and macrostructures of steel, tensile strength and charpy impact tests. The technological tests compared technological properties of these steels.
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Comparison of quality of milk from conventional and organic farming
Cermanová, Ivana ; Vítová, Eva (referee) ; doc.Ing.Oto Hanuš, Ph.D. (advisor)
The diploma thesis focuses on the comparison of milk quality in two different ways of farming, conventional and organic farming. Almost a hundred parameters on the set of 64 bulk milk samples were monitored. The theoretical part of the paper describes the composition of cow's milk, its technological and hygienic properties and it notes the nutritional impact of milk and milk products. It also mentions the most important legal definition of organic farming. Experimental part describes the setting of the experiment and mentions the methods used to analyze milk samples for individual parameters and it details the ten selected determination. The difference in measured values of various milk indicators depending on the dairy farm was observed by using statistical methods and an explanation was suggested in the case of the statistical significance. The thesis was based on the cooperation of the Faculty of Chemistry VUT Brno and a National reference laboratory for raw milk at the Research Institute for Cattle Breeding in Rapotin.
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Non-ferrous alloys and their use in practice
Měřinský, Ivo ; Mikulka, Vít (referee) ; Staňková, Markéta (advisor)
This work introduces us with non-ferrous metal alloys and their applications in industry. The area is dedicated to the most widespread copper and aluminium alloys, less used alloys, such as magnesium, titanium, gold and silver alloys. For each alloy is given its manufacturing technology, distribution according to different perspectives and their properties. At the end of each chapter you can meet with examples of using alloys in practice.
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Technological applications of cemented carbide tools
Kolomazník, Aleš ; Humár, Anton (referee) ; Prokop, Jaroslav (advisor)
bachelors thesis is on focused on the task:specification and analysis of technological application conditions of cutting tools Carbide.It consists of three parts.The first part deals wiht the development of SK,the nature and properties of sintered carbides.The second part focuses on the technological conditions of parameters of the job application Carbide.The goal was getting to know the structure,production,properties and applications
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Substitution of cellulose and non-edible collagen casings by plastic casings in the meat industry in the Czech Republic
BURIAN, Rudolf
The aim of this thesis is to assess the possibility of substitution of cellulose and non-edible collagen casings by plastic casings. The first part deals with selected types of casings, as well as their basic definitions, technological properties and applications, as described in literature. The second part describes the process of carrying out the analysis itself, from the selection of appropriate types of casings produced by Viscofan CZ Ltd. České Budějovice, through the measurement of their chosen technological properties, to the data evaluation
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Technological characteristics of meat - viscosity
DIBĎÁK, Tomáš
This bachelor thesis is focused on the technological characteristics of meat, mainly viscosity of meat. At the beginning I dealt with construction of meat and various types of meat: beef, veal, pork, mutton, rabbit, poultry and venison. Then I described basic chemical composition of meat and it?s characteristic. In detail I dealt with viscosity of meat. Viscosity is the ability of meat to bind water both own and added. I mentioned influences, which effects viscosity and I presented the possibilities, how to measure viscosity of meat. The last chapter describes the process of post mortem changes in meat both normal and abnormal.
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Factors affecting the quality of pig meat
PÖSINGEROVÁ, Kateřina
The aim of the bachelor thesis was to compile the factors effecting on the quality of pork meat, which include nutritional value, sensory characteristics of meat (texture, juiciness, taste and smell), technological properties (pH, colour, water holding capacity, electrical conductivity) and the influences which impact the meat quality, such as breeding affiliation, age and weight at slaughter, sex and nutrition. In this work was also described transport to the slaughterhouse and stabling as well as ways of stunning and bleeding. Another factors affecting meat quality are quality variations (PSE, DFD, PFN and RSE), which are also included.
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Funktional Effects Improve of Artifical Casings in Meat Production.
BURIAN, Rudolf
The aim of this work is to capture the evolution of functional characteristics of plastic casings used in the meat industry. The first part deals with the history and development of casings as a packaging material and the functional characteristics of plastic casings in general. The second part introduces plastic casings produced by Viscofan Ltd. České Budejovice, focusing on their functional properties, methods for detecting these properties, possibilities of their usage in the meat industry, their processing and influence on extending shelf-life of meat products during storage at low temperatures.
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