selenium

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selenium

 [sĕ-le´ne-um]
a chemical element, atomic number 34, atomic weight 78.96, symbol Se. (See Appendix 6.) It is an essential mineral nutrient. Dietary sources of selenium include seafoods, kidney, and liver. Humans can adjust their homeostasis mechanism for selenium over a wide range of dietary intakes. Recommended intake levels are generally met from the diet, so that supplements are not necessary.
selenium sulfide
1. the sulfide salt of selenium, a topical antiseborrheic and antifungal applied topically to the scalp to control seborrheic dermatitis and dandruff; also used topically in the treatment of tinea versicolor.
2. the sulfide salt of selenium, an antiseborrheic and antifungal; used topically in the treatment of seborrheic dermatitis and dandruff of the scalp and of tinea versicolor.

se·le·ni·um (Se),

(sĕ-lē'nē-ŭm),
A metallic element chemically similar to sulfur, atomic no. 34, atomic wt. 78.96; an essential trace element toxic in large quantities that is required for glutathione peroxidase and a few other enzymes; 75Se (half-life equal to 119.78 days) is used in scintography of the pancreas and parathyroid glands.
[G. selēnē, moon]

selenium

A non-metallic element (atomic number 34; atomic weigh 8.96) that is required in trace amounts by certain enzymes (e.g., glutathione peroxidase); it interacts with vitamins A, C and E, serving as an antioxidant. Selenium is believed to be anticarcinogenic, to retard ageing, and has been used for arthritis, cataracts, connective tissue disease, dandruff and age-related vision loss.  

Sources
Brewer’s yeast, cereals, dairy products, fish, fruits, liver, organ and muscle meats, seafood, vegetables and whole grains.

se·le·ni·um

(sĕ-lē'nē-ŭm)
A metallic element chemically similar to sulfur; atomic no. 34, atomic wt. 78.96; an essential trace element toxic in large quantities; required for glutathione peroxidase and a few other enzymes; 75Se (half-life equal to 119.78 days) is used in scintography of the pancreas and parathyroid glands.
[G. selēnē, moon]

selenium

A trace element recently found to be an essential component of the enzyme deiodinase which catalyses the production of triiodothyronine (T3) from thyroxine (T4) in the thyroid gland. Selenium deficiency prevents the formation of T3.

se·le·ni·um

(sĕ-lē'nē-ŭm)
A metallic element used in scintography of pancreas and parathyroid glands.
[G. selēnē, moon]
References in periodicals archive ?
Ulrich Schade at the HZB has now comprehensively examined samples of tin selenide with the aid of infrared spectroscopy at BESSY II and hard X-rays at PETRA IV.
Semiconductor selenides find applications as laser materials, optical filters, sensors, and solar cells.
Editor's Note: "This led us to wonder whether supplementing the body's naturally occurring selenide with an infusion of selenide might further protect tissues after a heart attack once blood flow is restored," Dr.
Selvin, for instance, takes a core of cadmium selenide and then adds a sulfur atom and a chain of 11 carbon atoms.
In summary, two selenoethers (pyrazole- and benzotriazole-containing, 2 and 4) were prepared using elemental selenium-rongalite system for in situ selenide ion generation.
International Resource News-March 30, 2012--Air Products starts expansion of hydrogen selenide production capabilities in Hometown(C)1994-2012 ENPublishing - http://www.enpublishing.co.uk
Titanium dioxide (TiO2) nanoparticles are coated with cadmium sulfide (CdS) or cadmium selenide (CdSe.) The composite nanoparticles, when mixed with a solvent, form a paste that can be applied as one- step paint to a transparent conducting material, which creates electricity when exposed to light.
Previous studies have shown thai Ag accumulates in tissues as silver sulfides ([Ag.sub.2]S) and silver selenide ([Ag.sub.2]Se).
Also, the company is expected to open a factory in 2013 in Taiwan to turn out copper indium gallium selenide (CIGS) solar cells.
More than 120,000 CIS (copper indium selenide) photovoltaic modules, supplied by the Japanese thin film leader Solar Frontier, a 100 per cent subsidiary of Showa Shell Sekiyu KK, will be installed.
More than 120,000 CIS (Copper Indium Selenide) photovoltaic modules will be installed, supplied by Japanese thin film leader solar frontier (Showa Shell Sekiyu KK).
The company manufactures standard and customised crystalline, amorphous, and copper indium gallium selenide (CIGS) modules.