Experiment was conducted, in which were served different levels of zinc for the cockerels Ross 308. The aim of my study was to discover, if the level 204 mg Zn/kg of feed mixture will affect the sensory characteristics of the thigh and breast muscle after 30 days of storing. From the sensory analysis, performed by the 12 evaluators, appears, that the higher level of zinc did not have a statistically significant impact on the sensory characteristics of the thigh and breast muscle in majority parameters in my study. Exception was a statistically significant difference (p < 0,05) in aroma at the thigh muscle after correction of evaluator (Zn 24 mg was evaluated 1,03 +- 0,02 and Zn 204 mg was evaluated 0,97 +- 0,02). In the breast muscle of the experimental group was relatively the best rate the juiciness - 5 % above the average. In the thigh muscle of the experimental group was relatively the best rate also the juiciness - 10 % above the average.

This thesis deals with the influence of foliar application of selected forms of zinc on the yield and quality of corn grain (Zea mays L.). The issue was dealt with in the form of a small-plot vegetation experiment on the landfill site in Žabčice. Zinc was applied in the 6-8 leaf phase in three forms of ZnO, ZnSO4 and Zn-EDTA at doses of 100, 250 and 500 g.ha-1 in each of them. A zinc-free variant was used as a control. In the course of vegetation (14 days after fertilizer application (20 June 2018)) and after harvesting, an inorganic analysis of the plants (Zn content) was carried out, NDVI and NDRE index were determined during vegetation. After harvest, the yield, starch content and weight of a thousand seeds were determined. Zinc fertilization proved to be (p≤0.05) affected by the zinc content during vegetation, but had no effect on NDVI and NDRE index. Grain yield was positively influenced, although no proven zinc effect was demonstrated. WTS and starch content in the grain were neither demonstrably affected nor significantly different from control. Zinc content in the grain was not significantly affected, but zinc fertilization was positive.

There are many external and internal factors which influence the quality and yields of vegetables. Counted among the external factors is nutrition and fertilisation which are an integral part of growing technologies. Without sufficient and balanced supply of acceptable nutrients the plants are not capable of achieving high quality and yields. Among the essential nutrients we also count micro biogenic elements. Although vegetables require only small amounts, their importance is equal to nitrogen, phosphorus, potassium and other macro elements. The first part of the bachelor dissertation thesis maps the present information about the importance of some micro nutrients (B, Zn, Mo) in the nutrition of vegetables. In a two-year vegetation experiment we explored the effect of foliar applications of some micro elements on their content in radish plants and on the yields of the edible part of this root vegetable. The experiment was established as a pot experiment in soil culture. During vegetation we applied the nutrients at graded rates. The effect of the foliar application was evaluated on the basis of analyses of the plant mass and yield parameters. The results showed that foliar nutrition with micro nutrients increased their contents namely in the leaves, but also in the radish roots. Fertilisation had a significant effect on the yields of whole plants in a similar way as on the edible roots. Supplementary fertilisation with the micro nutrients increased roots yields by 7,0 to 46%. Zinc at a rate equal to an application of 700 g Zn.ha-1 had a statistically significant effect on the production of radish roots. Radish yields increased significantly also after the application of molybdenum at a rate equal to 62.5 g Mo.ha-1.

The subject of this final thesis is Nutrition of the race horses. The first part deals with a digestive tract, nutrients and different kinds of feed. It also mentions a body condition score and importance of zinc for organism. Next part of the thesis focuses on the observation of zinc levels in hoof horn dry basis and horsehair with chosen horses. The experiment contained twelve horses of different ages all of them were Czech warmblood. The levels of zinc in hoof horn were statistically provable (P<0,05). The levels of zinc in horsehair dry basis, on the other hand, were not statistically provable (P>0,05).

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The thesis deals with determination of selected nutrients (copper, zinc, iron) in nuts. In total, 33 samples, bought in retail chains in Czech Republic, were analysed. The theoretical part of the thesis is focused on characterisation of individual nuts including other fruits, which are consumed as nuts. In the practical part, contents of copper, zinc and iron were measured by the atomic absorption spektrometry method. From the results, it is clear that the highest amount of copper was found in Brazil nuts. The lowest amount of copper was found in macadam nuts. Overall the highest content of zinc within all types of nuts was found in pine nuts and the lowest amount of zinc was determined in coconut and edible chestnuts. Iron was the most contained in alaburks, cashews and pine nuts. The lowest quantitty of this element was measured in edible chestnuts.

This diploma thesis deals with study of influence of addition of different doses, forms of calcium and zinc into feed mixtures for broiler chickens. The aim was to find out how different doses or forms of these minerals affect the concentration of calcium and zinc in the blood of chickens. Ross 308 broiler chickens were used in the experiments. Calcium and zinc were fed to the feed mixture in the form of calcium carbonate, zinc oxide or organically bound zinc. The basal diet of the control group contained 2 g of calcium. Different doses of calcium carbonate (6 g, 9 g, 15 g / kg of feed mixture) were fed to three groups. Four groups were fed with the addition of zinc oxide at doses of 20 mg, 40 mg, 120 mg and 180 mg / kg of the feed mixture. In the next experiment, zinc was fed in various forms and different amounts to compare the effect of feeding organically bound zinc. At the end of the experiment, blood samples were taken during the slaughter and the concentrations of the studied elements were determined. Statistically significant differences in blood calcium levels have been demonstrated between the control group (containing Ca in the feed mixture 2 g / kg) and the groups of animals that we increased calcium (to 6 to 15 g / kg of compound feed). However, experimental groups did not have any significant differences. It has been found that increasing amounts of Ca in the feed have a negative effect on the concentration of magnesium in the blood. In the zinc subsidy experiment, we found conclusive differences between the control group and the experimental groups. At lower doses of Ca (less than 9 g Ca / kg) and Zn (less than 180 g Zn / kg) in the feed mixture, a proven correlation between the concentration of Ca and Zn in the feed and blood was demonstrated.

This work focuses on evaluation of mechanical and anticorrosive properties of zinc coatings. Work as a first characterizes kind of corrosion and possibilities of corrosion protection measures. For the purpose of the experiment, test samples representing a cross-section of current methods of corrosion protection using zinc coatings were prepared. Mechanical properties were evaluated by bend testing and the Erichsen method. Corrosion test specimens were tested in a corrosion chamber. An electron microscope was used for more detailed structural analysis. Electron microscope elemental analysis of selected coatings was also included. Based on the information obtained, it proposes a suitable solution in practice, depending on use of the plated component.

This thesis deals with the influence of zinc various forms on the intestinal microbiota of pigs. At the beginning, the thesis presents a basic overview of nanoparticles, especially zinc one, which have been used in practical terms. Also, the topic of intestinal microbiota in weaned piglets and the effect of nanoparticles on neonatal diarrhea, which is often associated with weaning, is discussed. The practical part deals with the influence of different zinc concentrations on intestinal bacteria at 0, 5, 10 and 20 days after weaning of the pig from the sow. The total number of microorganisms at individual concentrations and also the number of coliform bacteria, which are very often the source of diarrheal diseases, were determined. Four selective agars were used for qualitative assessment of the composition of the intestinal microbiota and the percentage growth on the individual growth medium was determined.