Mushrooms (of course, those grown in an ecologically safe area) accumulate many microelements good for human and animal health, in particular, selenium. The natural cycle of selenium was studied by a team from the Vernadsky Institute of Geochemistry and Analytical Chemistry in Moscow.
The scientific expedition worked in the eastern part of the Meshchera (at the meeting point of the Moscow, Ryazan, and Vladimir areas). Scientists found selenium in many natural objects (soil, grass, leafs, elk`s excrements, mosquito larvae, and tissues of brown frog), however, its highest levels were observed in mushrooms. A concentration reached milligrams per kilogram of the mushroom weight, i.e., exceeded the selenium contents in other objects by three orders of magnitude.
Selenium is concentrated most significantly by "tubular" mushrooms (having an umbrella-shaped cap with spore-bearing tubules on the underside), and the record-holder is edible boletus - Boletus edilus. "Platy" mushrooms (with spore-bearing thin plates on the underside) of the genus Lycoperdon, Cantharellus, Agaricus, Lactarius, and Amanita are also enriched in selenium. A certain amount of selenium volatilizes upon mushroom drying, as was indicated by a considerable decrease in its content. This may be explained by the predominance of labile forms of selenium in the fungal tissues. This assumption is confirmed by the fact that selenium is easily extracted from fungi by acid and alkali solutions and also by water. Therefore, as one cooks some mushroom soup, most part of selenium goes into broth.
Nadia Markina | alphagalileo
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