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Selenium print that page


are selenide or selenate compounds are also known, but are rare. The chief commercial uses for selenium today are in glassmaking and in chemicals and pigments . Uses in electronics , once important, have been supplanted by silicon semiconductor devices. It is a semiconductor with the unusual

Selenium dioxide print that page


NFPA 704 0 3 0 Flash point Non-flammable Related compounds Other anions Selenium disulfide Other cations Sulfur dioxide Tellurium dioxide Related selenium oxides Selenium trioxide Related compounds

Selenium yeast print that page

Selenium is physiologically essential and may also offer a protective effect against several degenerative diseases. [ 4 ] The organic form of selenium provided by selenium yeast has been shown to differ in bioavailability and metabolism compared with inorganic (e.g., selenate, selenite) | 2011/2/14 14:47:41

Photographic print toning print that page


ed with software in digital photography Contents 1 History 2 Chemical toning 2.1 Selenium toning 2.2 Sepia toning 2.3 Metal replacement toning 2.4 Dye toning 3 Digital toning 4 Examples 5 See also 6 References 7 External links [ edit ] History Beginning

Selenium cycle print that page

The Selenium Cycle is a biological cycle of selenium similar to the cycles of carbon, nitrogen, and sulpur. Within the cycle, there are organisms which reduce the most oxidized form of the element and different organisms complete the cycle by oxidizing the reduced element to the initial | 2010/9/26 16:54:30

Selenium disulfide print that page

The material commercially called selenium disulfide is sold as an antifungal agent in shampoos for the treatment of dandruff and seborrheic dermatitis associated in the scalp with Malassezia genus fungi. [ 2 ] [ 3 ] [ 4 ] In the United States , a 1% strength is available over-the-counter | 2011/5/19 16:11:34

Selenium tetrafluoride print that page

101 °C Hazards NFPA 704   3 2 W Related compounds Other anions selenium dioxide , selenium (IV) chloride , selenium (IV) bromide Other cations sulfur tetrafluoride , tellurium(IV) fluoride Related compounds selenium difluoride , selenium hexafluoride | 2011/2/1 5:08:28

Selenium hexasulfide print that page

are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references Selenium hexasulfide ( Se 2 S 6 ) is a chemical compound . It is an oxidizing agent. [ edit ] References This article needs additional citations for verification . Please help improve | 2010/9/27 3:45:42

Selenium hexafluoride print that page

Like many compounds of selenium , SeF 6 is hypervalent . The compound has octahedral molecular geometry with Se-F bond length 168.8 pm . SeF 6 can be prepared from the elements [ 5 ] or by the reaction of bromine trifluoride (BrF 3 ) with selenium dioxide . The crude product is purified | 2011/5/20 6:42:32

Selenium tetrachloride print that page


The compound is prepared by treating selenium with chlorine: [ 3 ] When the reacting selenium is heated, the product sublimes from the reaction flask. The volatility of selenium tetrachloride can be exploited to purification of selenium . Solid SeCl 4 consists of separated Cl − and