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Negative lead-acid battery electrode for hybrid electric vehicles
Dvořáček, Daniel ; Křivík, Petr (referee) ; Bača, Petr (advisor)
The thesis briefly discusses the issue of electrochemical power sources, especially with a focus on lead-acid batteries operating in modes that are typical of hybrid electric vehicles. The theoretical part of the thesis should be a good basis for the subsequent practical part, in which several experimental electrodes and their parameters will be performed and evaluated. The output of the practical part will be conclusions regarding the influence of different variants of modified carbon used as an additive in the active material of the negative electrode on the capacity and life of cells
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Vliv aditivace na mazací schopnost motorového oleje
Kouřil, Radim
This thesis describes the influence of selected additive on lubricating abilities of motor oil. The first part describes the basic properties of engine oils, types of additives, their production and distribution. Further, basic tribological properties such as friction, wear, lubricity, lubricity and viscosity are described. In the second part of the thesis was measured the influence of additive on lubricating ability of engine oil. The measurement was divided into two basic parts. The first part was devoted to the measurement of abrasion and the second was to measure the density and viscosity of the separate engine oils and the additive additive. The measurement results were tabulated. At the end, a summary and discussion of the measured results was performed.
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Vybrané aditivné látky a ich toxikologické zhodnotenie
Klačmanová, Lucia
This bachelor thesis looks at the use of food additives and their use in food manufacturing. The first part groups additives according to the current legislation. Further section looks at additives from the toxicological point of view. The emphasis is put on antioxidants, conservatives, colourants and sweeteners. The next part deals with legislation on both Czech and European level. It briefly covers the detection methods of additives. Finally, it deals with the testing of additives, evaluation of its toxicity and the impact on human health.
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Negative lead-acid battery electrode for hybrid electric vehicles
Dvořáček, Daniel ; Křivík, Petr (referee) ; Bača, Petr (advisor)
The thesis briefly discusses the issue of electrochemical power sources, especially with a focus on lead-acid batteries operating in modes that are typical of hybrid electric vehicles. The theoretical part of the thesis should be a good basis for the subsequent practical part, in which several experimental electrodes and their parameters will be performed and evaluated. The output of the practical part will be conclusions regarding the influence of different variants of modified carbon used as an additive in the active material of the negative electrode on the capacity and life of cells
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The Evaluation of quality of conserved fodder and recommendations of conservation technology improvement in selected farm
PAVLÍK, Václav
The aim of this thesis was to assess the quality of preserved forage in various ways of preserving silage. Sensory evaluation of the fermentation process and laboratory evaluation was used to assess the quality of legume-based silages in various preservation technologies. In addition, forage preservation in silage pressing technology was compared with and without additive (Silafor 2000 Plus). The literature review shows the importance of feed conservation, basic methods of conservation of forage, botanical composition of forage crops, conservation principles and their processes. The following are the advantages and disadvantages of preservation processes. In total, 3 ways of preservation of legume-free mixture - baling of foil, silage trough and silage bag - were evaluated. The evaluation of the results of the technology was based on the best results of the method of preservation in the bag, the preservation in the pit, the package using adiditive and the lower quality preservation of the package without additive. The forage quality was also significantly influenced by the proportion of oats in the mixture and the phenophase of the harvest.
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The adjustment of the feed ration for laying hens in order to improve the strength and the hardness of eggshells
HEINDL, Jakub
This major thesis expands the issue of the bachelor thesis "The issue of raising laying hens considering on introduction of enriched cages" and adds new knowledge relating to the topic feed rations and their influence on the final production. The theoretical part of the thesis analyses the basic theoretical concepts cohering with this topic, focused on creating a comprehensive overview of the structure and quality of the eggs, the basic ingredients in the feed rations, qualitative parameters of grapes as the modified additive provided by us and last but not least there is processed the recent overview of the current state of large-scale farmers in the Czech republic. The practical part of the thesis aims to test the effect of the proposed feed with an additive in the form of the crushed grape seeds, on the strength of the eggshell, by homogeneous samples of the breeds through from us proposed measuring instrument. Subsequently, a statistical evaluation of measured results is realized. In conclusion, the consideration is extended to the economic evaluation of costs and profits in case of the implementation of the suggested feed ration into practice in order to quantify the difference compared to the commonly used feed ration.
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