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This thesis “Increasing the nutritional value of intergeneric hybrids of Festulolium for fodder by non-root application of selenium” describes a one-year study on the reactions of four varieties of Festulolium to biofortification with selenium in a small plot. All variants of the fodder were fertilized at a standard nitrogen (N) dose of 60 kg.ha-1, and selenium was applied foliarly as Na2SeO3 in at an offshoots phase at 16 g.ha-1 and 32 g.ha-1. Non-root applications of selenium, especially at a lower doses of 16 g ha-1 is statistically proven to be an appropriate measure to increase yield and increase selenium content and nutritional values (dry matter, nitrogenous substances, fibre, WSC and NEL) in fodder of both loloid and festucoid types of Festulolium. The most effective influence on clayey hybrids (Festulolium braunii) was exerted through spraying selenium onto the leaves at a dose of 16 g.ha-1, while a dose of 32 g.ha-1 exerted a greater effect on fescue (Festulolium krasanii). Biofortification of the observed fodder plant species by selenium was proven to be a valid means of enriching fodder with a consequent positive effect in the food chain.

The theoretical part of the master's thesis contains knowledge about nutrition of goat, anatomy of the digestive tract, free radicals, selenium and ingredients of goat's milk based on available literature resources. The objective of the practical part was to experimentally determine the impact of the the addition of selenium to feeding ration for organic raised goats on qualitative and quantitative parameters of goat's milk and selenium content in goat's milk. The experiment was held on an organic farm in Prostejov area in June and July 2016, it lasted 30 days. Goat breeds raised on the farm were White Shorthaired and Anglo-Nubian. There were 12 goats studied in the experiment, divided into a treatment group (n = 6) and a control group (n = 6). Milk samples from each goat were collected at the beginning and end of the experiment The samples were analyzed in a laboratory for analysis of milk in Brno - Turany, selenium was analyzed at the Department of Chemistry and Biochemistry MENDELU. The results were evaluated and compared. The results of the experiment shows that the addition of selenium had an impact on its concentration in goat's milk but it had no effect on milk components (fat, protein, lactose, urea, somatic cell count) and milk yield.

Thesis (Doctoral)--Universität Hannover, 1982.

Universiẗat, Diss., 2002--Kiel.

The aim of the diploma thesis was to assess the influence of foliar application of selenium on the yield and the content of selenium in the oil of rapeseed (Brassica napus) by means of a small plot experiment founded in 2013 on the land of Školní zemědělský podnik Žabčice. The selenium was applied in the form of sodium selenite in two doses of 30 and 60 g of selenium on hectare. The application of both of the two doses was carried out in three periods of time: before flowering, after flowering and in the form of a divided application i.e. half of the dose was applied before flowering and the other half after flowering. The application of selenium did not have statistically important influence on the yield of the seeds of rapeseed. In all the variants there was a statically highly important increase in the content of selenium in the seeds as compared with a control variant. The highest content of selenium was detected with the divided 60 g dose of selenium. Differences in the content of selenium in the seeds between the 30 g dose variant and the 60 g dose variant were not statistically significant. The influence of the time of application of selenium on the total content of selenium in the seeds of rapeseed was statistically highly important. The lowest content of Se in the seeds was observed with the variant to which Se was applied before flowering. Contrastively, the highest content of selenium was detected with the variant with divided application of selenium. The application of selenium negatively influenced oiliness. With all the variants there was an approximately 10 % reduction of oiliness as compared with the control variant to which no selenium was applied. Differences in oiliness caused by the size of the doses of Se and times of applications are not statistically significant.

No description available.

No description available.

This master thesis is dedicated to the determination of concentration of selenium and mercury in seafood. The theoretical part is devoted to the selenium characteristics, toxicity and occurrence of the biochemical functions of selenium and the relation of selenium and mercury in fish. The practical part deals with the determination of selenium and mercury in fourteen species of fish that have been purchased fresh or vacuumed in chains store in the Czech Republic. Analysis of the selenium content was performed by atomic absorption spectrometry with electrothermal atomization. Determination of the total mercury content was performed with using atomic absorption spektrometer AMA 254. Results of total mercury contents were compared with legislative limits as per Commission Regulation (EC) No. 629/2008. Selenium Health Benefit Values Se-HBV were calculated.

This diploma thesis (Heterotrophic incorporation of selenium in Chlorella sp.) focuses on characterisation of the genus Chlorella and large-scale use of algae for biofuel and starch production. Besides that, the thesis contains an up-to-date summary of forms of autotrophic algae cultivation ranging from large-volume tanks covering the area of dozens of hectares down to laboratory cultivation in photobioreactors and heterotrophic cultivation of algae in fermenters. Experimental part of the thesis focuses on cultivation and observation of the heterotrophic growth of algae Chlorella vulgaris in relation to the concentration of added selenium which was performed on glucose substrate with varying concentrations and forms of selenium. Selenium was applied in a form of sodium selenite Na2SeO3 and sodium selenate Na2SeO4. Numerous experimental repetitions suggest a significantly important effect of the form of the added selenium on growth rate and vitality of Chlorella sp. While the algae did not thrive on sodium selenite medium, they prospered on sodium selenate and exhibited faster growth compared to that on the media without additional selenium.