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Hydrogen tanks for automotive use
Báborský, Tomáš ; Kučera, Pavel (referee) ; Píštěk, Václav (advisor)
Bachelor thesis deals with hydrogen storage especially for automotive applications. It describes the characteristics of hydrogen, high-pressure hydrogen tanks, hydrogen production by electrolysis and its connection with the possibility of accumulating electricity from renewable sources. Further, hydrogen use in the most advanced cars with fuel cells and their properties. At the end of this thesis I describe my proposal for solving the problem of the construction of hydrogen pumping stations, which are portable tanks.
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Morphological differences in farm groups of salmonid fishes
Halačka, Karel
The aim of this study was examination of a influence species/line and stock conditions. This paper record first results form three groups of salmonid fishes – rainbow trout (from Italy and Denmark) and brook trout hybrides (S. fontinalis x S. alpinus). There were choosen morphological parameters observed – body contruction, weigth of intestine organs, epidermal and gill structure and erythrocyte size.
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Problems of hybrids and non-native species of falconry birds of prey (Falconiformes)
RICHTROVÁ, Zuzana
There have been more and more discussions of the influence of falconry on wild populations of birds of prey in recent years. Where the main topic previously dealt with stealing young birds from nests, today's concerns revolve around interspecific hybrids and non-native species. This thesis therefore focuses on these issues and attempts at collecting available information. The main finding is that only few serious researches have been carried out on this topic so nobody can make a conclusion that would subsequently lead to practical interventions. The available sources clearly show that non-native species are most likely not to pose any risk to nature. In contrast, the information on hybrids was very inconsistent and often diverged. It is probable that hybrids have some influence in nature; but to determine its severity and whether or not intervention is required, we need to carry out a detailed scientific study. IAF (International Association for Falconry) recommends a number of measures that seem to be sufficient at the time and they include: - ban on arbitrary discharge of hybrids and non-native species into the wild - ban on free-hacking while training these birds - requirement to use telemetry in training - requirement to use maximum effort in order to trace these birds in case they get lost - imprinting of young hybrids in species that is not found in nature in the given area Improvement should mainly be made in the registration of birds of prey. At this point and in most countries, it does not allow you to trace the birds' parents reliably and, as a consequence, one cannot unambiguously determine whether the bird in question is a hybrid or pure species.
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Hydrogen tanks for automotive use
Báborský, Tomáš ; Kučera, Pavel (referee) ; Píštěk, Václav (advisor)
Bachelor thesis deals with hydrogen storage especially for automotive applications. It describes the characteristics of hydrogen, high-pressure hydrogen tanks, hydrogen production by electrolysis and its connection with the possibility of accumulating electricity from renewable sources. Further, hydrogen use in the most advanced cars with fuel cells and their properties. At the end of this thesis I describe my proposal for solving the problem of the construction of hydrogen pumping stations, which are portable tanks.
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Growing of corn and changes in technology depending on the direction of production
KŮRKA, Pavel
Bachelor thesis deals with the cultivation of maize. Describes the development of maize cultivation from history to the present time. The basic division is growing crops for grain and silage. Also important is choosing the right hybrids. Provides information about changes in technology and equipment needed for corn growers. And changes technology depending on the direction of production. Work is processed trought literature review on the basis of information from books, publications and other articles.
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The morphological and genetic differentiation of \kur{Daphnia} in canyon-shaped reservoirs
HOROVÁ, Barbora
We analysed the pattern of spatial heterogeneity of Daphnia longispina species complex in 11 canyon-shaped reservoirs. We found for the first time that the spatial pattern is not random. Daphnia cucullata shows strong preference for upstream regions while Daphnia longispina and D. galeata x longispina are preferring the deep downstream parts of reservoirs. These not random pattern is probably driven by longitudinal and vertical ecological gradients (fish predation pressure, nutrient concentration, phytoplankton biomass etc.)
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