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Selenomethionine (SeMet) is a naturally occurring amino acid.The L-selenomethionine enantiomer is the main form of selenium found in Brazil nuts, cereal grains, soybeans, and grassland legumes, while Se-methylselenocysteine, or its γ-glutamyl derivative, is the major form of selenium found in Astragalus, Allium, and Brassica species. [1]
The use of inorganic selenium fertilizers can increase selenium concentrations in edible crops and animal diets thereby improving animal health. [31] It is useful to apply a high phosphorus content fertilizer, such as bone meal, to perennials to help with successful root formation. [6]
27 records of plants. Origin Africa. This species' phanerogam has the highest cobalt content. Its distribution could be governed by cobalt rather than copper. [36] [1]: 891 [33] Cu: Helianthus annuus: Sunflower: Phytoextraction with rhizofiltration [1]: 898 [33] Cu: 1000: Larrea tridentata: Creosote Bush: 67 records of plants.
Chosen for its selenium content and high solubility, sodium selenate is a common ingredient in over-the-counter vitamin supplements. Selenium is a trace essential element. Sodium selenate and selenite are also common in premix animal feed. Neither compound has demonstrated a difference in the amount of selenium absorbed.
If any negative effect results, it is advised to induce vomiting and drink a high quantity of water. [1] Additionally, old or improperly stored specimens can cause food poisoning. Other lists of edible seeds, mushrooms, flowers, nuts, vegetable oils and leaves may partially overlap with this one.
The selenium content in the human body is believed to be in the range of 13–20 mg. [114] A reliable and sensitive method to quantify selenium in biological samples employs hydride generation and inductively coupled plasma mass spectrometry. [115] Selenium is a component of the unusual amino acids selenocysteine and selenomethionine.
Selenium is not produced directly by nuclear fusion. [13] Selenium makes up 30 parts per billion of the universe by weight. [57] There are only 5 parts per billion of tellurium in the Earth's crust and 15 parts per billion of tellurium in seawater. [2] Tellurium is one of the eight or nine least abundant elements in the Earth's crust. [7]
Selenium has a protective effect towards mercury toxicity. Mercury binds to selenium with high affinity, so this metal can inhibit selenium-dependent enzymes. However, increased selenium intake can preserve the enzyme activities, reducing the adverse effects caused by mercury exposure. [49] [50]