sélenium
21sélénium — (sé lé ni om ) s. m. Métalloïde qui se rapproche beaucoup du soufre, et qui fut découvert en 1817 par Berzelius. ÉTYMOLOGIE En grec, la lune, à cause de ses analogies chimiques avec le tellure, métalloïde déjà connu à l époque de la découverte …
22selenium 75 — a radioactive isotope of selenium, atomic mass 75, having a half life of 119.77 days and decaying by electron capture with emission of gamma rays (0.265, 0.136, 0.121, 0.280, 0.401 MeV); it is used as a tracer in adrenal scintigraphy and in… …
23selenium — n. a trace element that is an essential component of the enzyme glutathione peroxidase, which catalyses the oxidation of glutathione by hydrogen peroxide. It thus has important antioxidant properties. Dietary deficiency of selenium results in… …
24selenium — A mineral that is needed by the body to stay healthy. It is being studied in the prevention and treatment of some types of cancer. Selenium is a type of antioxidant …
25selenium — n. Chem. a non metallic element occurring naturally in various metallic sulphide ores and characterized by the variation of its electrical resistivity with intensity of illumination. Usage: Symb.: Se. Phrases and idioms: selenium cell a piece of… …
26Selenium (software) — Selenium is a portable software testing framework for web applications. The tests can be written as HTML tables or coded in a number of popular programming languages and can be run directly in most modern web browsers. Selenium can be deployed on …
27Selenium monochloride — IUPAC name Selenium monochloride Other names Dichloro …
28Selenium dioxide — Selenium dioxide …
29Selenium (maladie professionnelle) — Sélénium (maladie professionnelle) Cet article décrit les critères administratifs pour qu une intoxication au sélénium soit reconnue comme maladie professionnelle. Cet article relève du domaine de la législation sur la protection sociale et a un… …
30Selenium deficiency — is relatively rare in healthy well nourished individuals. It can occur in patients with severely compromised intestinal function, those undergoing total parenteral nutrition, and also [ [http://www.ajcn.org/cgi/content/full/71/2/590 Effect of… …
