energia: Selenium

Evidence: 100 • authority: 72

Selenium is a chemical element; it has symbol Se and atomic number 34. It has various physical appearances, including a brick-red powder, a vitreous black solid, and a grey metallic-looking form. It seldom occurs in this elemental state or as pure ore compounds in Earth's crust. Selenium (from σελήνη 'moon') was discovered in 1817 by Jöns Jacob Berzelius, who noted the similarity of the new element to the previously discovered tellurium (named for the Earth). Selenium is found in metal sulfide ores, where it substitutes for sulfur. Commercially, selenium is produced as a byproduct in the refining of these ores. Minerals that are pure selenide or selenate compounds are rare. The chief commer…

Evidence: 58 • authority: 80

Studies on selenium-related compounds VI. Biosynthesis of dimethyl selenide in rat liver after oral administration of sodium selenate*1

Evidence: — • authority: 92

Harnessing the Rhizosphere Microbiome for Selenium Biofortification in Plants: Mechanisms, Applications and Future Perspectives.. The rhizosphere microbiome plays a critical role in promoting crop health and productivity. Selenium (Se), a beneficial trace element for plants, not only enhances resistance to both abiotic and biotic stresses but also modulates soil microbial communities. Se biofortification of crops grown in seleniferous soils using selenobacteria represents an eco-friendly and sustainable biotechnological approach. Crops primarily absorb selenium from the soil in its oxidized forms, selenate and selenite, and subsequently convert it into organic Se compounds. However, the rol…

Evidence: — • authority: 92

An atlas of plant selenium metabolism.. Selenium (Se) is not only a rare and toxic element but also an essential micronutrient for humans and animals that is often in short supply. Terrestrial plants do not require Se, but it can have growth-promoting or negative effects, depending on the exposure level. In this Tansley review, we draw up a comprehensive metabolic map of the known plant Se metabolism and the sulfur (S) metabolism which it largely mirrors. We compile the current knowledge of plant selenometabolites, enzymes that handle this element and genes that affect Se uptake and tolerance. Large literature datasets are used to place Se in the overall elemental composition of land plants…

Evidence: — • authority: 80

Synthesis from 1,3-Dihalides or Related Compounds with Selenide Ions

Evidence: — • authority: 80

Facile Route to Rare Heterobimetallic AluminumCopper and AluminumZinc Selenide Clusters

Evidence: — • authority: 80

Structural, vibrational, thermal and computational studies of new organo-selenate compounds bis(4-carboxyanilinium) selenate and bis(4-carboxyanilinium) selenate trihydrate

Evidence: — • authority: 80

Inhibition of spontaneous mutagenesis in yeast cultures by selenite, selenate and selenide

Evidence: — • authority: 88

ChemInform Abstract: THE INTERACTION OF AROMATIC HYDROCARBONS WITH ORGANOMETALLIC COMPOUNDS OF THE MAIN GROUP ELEMENTS. IV. THE PREPARATION AND STRUCTURE OF THE NOVEL SELENIDE, , POTASSIUM METHYLTRIS(TRIMETHYLALUMINUM)SELENATE‐BISBENZENE. Abstract Aus dem Salz (I) wird mit Trimethylaluminium (II) in einem geschlossenen System der Komplex (III) erhalten, aus dem das unbeständige Selenid (IV) beim Erhitzen gebildet wird.