Faculty of Biotechnology and Food Sciences in Nitra Journal of Microbiology, Biotechnology and Food Sciences 1338-5178 special issue 3 (Food Sciences) vol. 4 2015-02-02 2015-02-02 SELENIUM AND ITS INFLUENCE ON THE CONTENT OF POLYPHENOL COMPOUNDS IN ONION (ALLIUM CEPA L.) 23 26 EN Judita Bystrická Judita Bystrická Petra Kavalcová Petra Kavalcová Janette Musilová Janette Musilová Ján Tomáš Ján Tomáš Tomáš Tóth Tomáš Tóth Matyáš Orsák Matyáš Orsák Onions (Allium cepa L.) are important source of bioactive compounds including polyphenols and have potential beneficial properties for human health. Selenium (Se) is an essential micronutrient that is required in small amounts. The aim of the research was to find out how selenium (Se) treatment affects on the quality of onion (Allium cepa L.). The content of the total polyphenols was determined by using the Folin-Ciocalteu reagent (FCR). Antioxidant activity was measured using a compound DPPH˙ (2.2-diphenyl-1-picrylhydrazyl).The Se treatment increased the content of total polyphenols (TCA) and antioxidant activity (AA). The content of total polyphenols in samples of onion during vegatation period moved in the range from 508.16±27.59 to 607.56±23.15. In this work was watched also the influence of potassium on antioxidant activity, where values were in interval from 25.90±0.47 to 39.72±2.64.
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