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The diploma thesis is focused on description and detection of service degradation of motorcycle engine oil. The first part is an introduction to lubricants and their basic physical properties. Followed by an overview of the classification of motor oils according to their composition and viscosity. In other chapters the thesis deals with the issue of lubrication of internal combus-tion engines and motorcycle oil filtration. The first of 6 samples represents the new oil, other samples have been obtained from the tested motorcycle oil tank. The experimental part of the work examines the motorcycle engine oil. There is a description of the instruments by which the samples were collected in order to obtain different parameters of oil degradation. Density, viscosity and metals in oil were measured in all oil samples. The results of individual oil samples are shown in graphs. The rate of oil degradation was determined.

This thesis documents the history and current status of fallow deer breeding in the area of interest of the hunters' association of Trojmezí hunting grounds. The work also contains information about the origin of fallow deer population in the area, detailed record of killed and dead animals, including data on their age, weight, trophy value, and photo documentation of trophies and antlers found on the site. The thesis also keeps track of the number of fallow deer in the area since its establishment in 2008 till 2014. Comparison of the data concerning the number of the animals obtained by direct counting by the hunters with the population model based on the population change is also included. The number of fallow deer was verified by counting the faecal pellets on transects in the spring of 2014. The used methods were the FSC method (with no transects cleaning) and the CPM method (with transects cleaning) and the results were statistically evaluated. The FSC method set the fallow deer population density to 4,58+-3,5 animals/km2. The CPM method set the population to 5,52+-5,1 animals/km2. There was no statistically significant variance between the numbers of game set by the mentioned methods. In comparison to the number of animals spotted by the hunters, the method of counting droppings found approximately three times the number of fallow deer. The results are evaluated using charts, graphs and comments.

The results of several studies whose theme was population density of game and the possibility of its estimation were summarized in this paper. Population density is one of the most important characteristics of animal population, especially in relation to the proper sustainable wildlife management. The first study dealt with verification technology of the Game Management Plan for selected ungulate species in the Czech Rep. Further work compared four different methods of counting and the appropriateness of using on the example of wild boar in the forest environment. The following two papers tested the possibility of using the method of dung counting for estimating the numbers of wild boar in the forest environment. Recent work has dealt with the study of the distribution of faeces of wild boar, depending on the different hunting management within two neighbouring hunting grounds. The first study found that the hunting planning in the Czech Republic is not suitable for all ungulate game species. Photo traps could be used to estimate the abundance of wild boar only in combination with other independent methods. Dung counting is a suitable method for estimating the numbers of wild boar. Dung counting could be also used to specify the spatial activity of wild boar in the forest environment.

Focus of the diploma thesis is to investigate the influence of the selected factors (type of wood, thickness, densification) on the wood hardness. For the experimental measurements the Brinell hardness test method was used. The hardness measurements were performed on the specimens made from two different types of wood. Obtained results were statistically analyzed into the graphs. The main goal of the thesis was to determine the change in the static hardness in dependence on the previously mentioned factors. From the experimental data it can be seen that the wood hardness increases with the higher degree of densification . This phehomenon applies to both investigated wood materials which are European beech (Fagus sylvatica) - hardwood specimen and European aspen (Populus tremula) - softwood specimen.

This thesis discusses the degradation of engine oil in a diesel engine of utility vehicle. The first part focuses on the fundamental issues of science discipline, which deals with identification of existing motors current status using information obtained from the analysis of the lubricants and fundamental character of lubricants. The next chapter is to outline the division oil production and their causes and methods of actual degradation. The actual chapter is also devoted to the lubrication system and its function. The experimental part deals with the actual provisions of the degradation of engine oil. There is a described process of taking individual samples and the methods for the determination of the examined physical quantity. Furthermore, the results themselves are processed and shown in the organized charts, where values were interleaved by linear regression and determination coefficients of R2 determination. In the end, conclusion of summary and discussion of the result are made.

The theoretical part of this thesis Physical properties of liquid fuels and biofuels for petrol engines describes fuels for petrol engines, it deals with properties this fuels and their production. It deals with nature of density, dynamic viscosity and measuring this parameters. Experimental part of this thesis is focused on measuring temperature depen-dence dynamic viscosity and density of gasoline, bioethanol and their mixtures. Results of the measuring are registred in tables and they are typified in graphs. Mathematical functions were found, which can be used for a convenient predicti-ons of physical properties of gasoline, biofuels and their mixtures.

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