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Metody získávání a využití olejů ze semen révy vinné
Hrnčiříková, Karolína
The bachelor thesis "Methods of obtaining and utilizing of grapevine seeds oil" deals with the issue of obtaining and utilizing this oil. The theoretical part deals not only with the detailed composition of the grapevine, but also with the grape marc and the technological separation of the seeds. Furthermore, it states various technological processes of oil production, particular content of grapevine seed oil and emphasizes their subsequent use. The last chapter deals with the types of edible oils. The research was aimed at sensory evaluation of selected edible oils, but mainly grapevine seeds oil, using a questionnaire survey. Participants compared scents, taste, appearance and harmony of six samples of edible oils. A spectrophotometric line was used to compare the colour intensity of the used oils. The OIV 100-point table was used for the final evaluation.
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Sekundární produkty révy vinné a vína
Cenková, Lenka
This Diploma thesis first deals with composition of the bunch of grapes and must. The following is a description of the selected consumable secondary products such as must, dealcoholized vine, jam, marmalade, jelly from must, vine jelly, grape seed oil, flour from grape seeds. Further describes other secondary products such as pomace (marcs) and vineyeard prunings and their usage and mentioned is also a significant waste resulting from the grape vine cultivation and vine production and its possible utilisation. In the practical part of the thesis there is performed the procedure of the production (conservation) of grape vine must and production of jelly from must from cultivars "Veltlínské zelené" and "Dornfelder". These 2 samples of jellies were then together with other 6 samples of similar products (5 of them vine products from other vineries, 1 product from different fruit - cherries) organoleptically evaluated and analytically measured in the laboratory. The results are processed into tables, charts, and statistically and verbally commented.
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Hodnocení účinnosti separačního zařízení při separaci semen z matolin
Müller, Petr
This thesis was aimed at evaluating the effectiveness of the separation device for the separation of seeds from marc. The first chapter describes the characteristics of marc and how is obtained. In the second chapter, the work was focused on the possibility of using the marc in waste management and food industries. The next chapter deals with separation technology and its technical support, which describes the different technologies and processes for the separation. The work also highlights the technological capabilities of drying seeds vine after separation. The experimental part of the work is focused on the evaluation of the separation of selected varieties. This assessment is complemented by tables and graphs of the results of the experiment. In the last chapter of the thesis focuses on determining the cost of separation of seeds and draft technological lines for medium and large wine-growing operations. Technological operations are accompanied by model proposals mobile and fixed lines.
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Comperison quality of eggs depending on form of feeding
PROCHÁZKOVÁ, Alice
The topic of my dissertation is Comparison of the quality of eggs depending on the method of feeding. The aim of this study was to investigate whether the quality of hen eggs changes after adding crushed grape seeds in the compound feed of the hens. Grape seeds are formed as a side product during wine making processes and contain large amounts of biologically active substances and suitable acids, which can improve the feed conversion and subsequently also improve the technological properties of eggs. With processing of grape seeds the effective utilization of crop residues in vineyards comes about. The experiment was conducted in two experimental periods and in each period 100 laying hens were surveyed. They were separated into two groups an experimental and a control one. In the control group the hens were fed with a standard mixture of N2 feed and in the experimental group there was a supplement of 5 weight percent of crushed grape seeds in the compound feed. Eggs were collected daily and once every two weeks an analysis of technological properties of eggs was conducted. The results of the experiment showed that the addition of crushed grape seeds containing a biologically active substance did not have a statistically significant effect on the quality and selected technological parameters of eggs.
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