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Monitoring of vitamin E content in the samples of cereals
Cibulcová, Pavla ; Borkovcová,, Ivana (referee) ; Benešová, Karolína (advisor)
Thesis deals with the analysis of vitamin E in cereal samples, namely barley and wheat and malt produced from them. Selected samples were treated with low-temperature plasma, fungicide and biological treatment to elimination fungus and mycotoxins. The aim of the thesis was to find out the influence of the treatment, the combination of several types of treatment on vitamin E content in grain and malt. If the content of health-positive substances is not reduced and grain can be used for food, malt, or for feed purposes. The theoretical part focuses on the properties, occurrence, biochemistry and importance of vitamin E for living organisms. It also focuses on the properties of cereals that are a significant source of vitamin E. Malt production and sample treatment are also described. The experimental part describes the field experiment, individual types of treatment, extraction of vitamin E from the samples and determination of vitamin E content by high performance liquid chromatography with fluorescence detection. The results are compared with the current literature. It was found that the treatment did not have a significant negative effect on vitamin E content.
Možnosti alternativního využití chmele na základě obsahu antioxidantů
Tvrdoňová, Barbora
The aim of this thesis was to determine the activity of vitamin E and their isomers. The other aim was market research on food supplement containing vitamin E and hops. Samples of vitamin E were collected in harvest of 2013 from two hop-gardens These samples have used varieties of Premiant and Sládek. Each of these contained 8 samples. The Results determinated that variety of Premiant had the higher activity of vitamin E from 119,3 to 135,6 mg.kg-1 than variety of Sládek. The activity of isomer by variety of Sládek is lower than the variety of Premiant. This activity of isomer fluctuated between 86,0 and 92,9 mg.kg-1. This quantity was used in expection to beer brewing. Concluding the main aim of this thesis. From market research implies the wide supply products of hops. These products are intended mainly for brewery to beer brewing, the higher variability of prices and the variety of pharmaceuticals and cosmetics. Thesis contains lists of products with hops and food supplement with vitamin E.

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