Alžbeta Hegedűsová

Evaluation of the ET-AAS and HG-AAS methods of selenium determination in vegetables.

ET-AAS and HG-AAS methods of selenium determination were compared and evaluated. The ET-AAS method has been followed with deuterium background correction and Zeeman background correction respectively. The following validation parameters were determined: accuracy (under repeatability conditions), trueness, calibration curve and linearity, limit of detection, limit of determination and combined standard uncertainty of the method. The HG-AAS method and the ET-AAS method with Zeeman correction were more suitable for the determination of low selenium concentrations in vegetables. The results were calculated by the standard addition method because of the strong matrix effect.

Polyphenols and their Mechanism of Action in Allergic Immune Response

Mini review article deals with the most studied group of chemical compounds – polyphenols – predominantly flavonoids in relation to their allergic immune response. There is clarified and discussed their mechanism of action as well. We emphasized on the strongest inhibitors of allergic reactions - luteolin, fisetin and apigenin, but in the second part the currently studied flavonoids have been summarized as well.

The effect of sodium selenate application on growth of the fruiting bodies in the first flush of mushroom Pleurotus ostreatus (Jacq.) P. Kumm

Abstract Pleurotus spp. is in the top three of the most widely grown mushrooms in the world production. It is known that mushrooms are able to accumulate most of the substances found in the culture medium very well. Selenium is a significant antioxidant and plays a very important role in the prevention of various types of diseases. This paper points to the possibility of enriching the culture medium of Pleurotus ostreatus (Jacq.) P. Kumm. with inorganic selenium. The aim is to obtain a biologically active food applicable to wide population nutrition. Using such foods as nutraceuticals can make a significant contribution to the positive influence of human health.

Content of Selected Bioactive Substances in Dependence on Lighting in Microgreens

Abstract Young plants, also called “microgreens”, are different kinds of vegetables, grains and herbs grown to the phenological phase of cotyledons, or to the development of the first pair of true leaves. The aim of the work was to study the influence of lighting on the young plants quality in selected 11 vegetables species. The experiment was carried out during the winter time in a heated greenhouse of the Botanical Gardens of SUA in Nitra. For the lighting there were used linear fluorescent lamps FLUORA T8 - L 36W / 77 - G13 during the whole period of cultivation. According to our results, the lighting had a positive impact on the quality of harvested plants. The higher contents of vitamin C, chlorophyll a and chlorophyll b were estimated in comparison with the control variant without lighting.