Читать книгу Selenium Contamination in Water - Группа авторов - Страница 43

Se forms unusual amino acids: selenocysteine and selenomethionine. In humans Se is a nutrient that functions as a co‐factor for reduction of antioxidant enzymes such as thioredoxin reductase and glutathione peroxidises found in some animal and plants (not all plants require Se). Dietary Se also reduces the effects of mercury toxicity, but it will be effective only at low doses of mercury. The excessive poisoning of Se can be measured through determination of Se in body fluids namely blood plasma, urine, and serum. There are some reports regarding cancer patients consuming selenomethionine through medicine that may achieve very high concentration of Se in plasma and urine of a person (Stadtman 1974).