Definitions for "Selenium"
an element needed by the body only in very small amounts that helps maintain tissue elasticity
An essential mineral that is a component of a key antioxidant enzyme in tissue respiration. Deficiency of selenium causes disease of the heart muscle. Food sources of selenium include seafoods, kidney and liver, and some grains and seeds.
One of the three most important natural antioxidants. Along with Vitamin E and C they can block the formation of tumors.
A nonmetallic element of the sulphur group of atomic number 34, analogous to sulphur in its compounds. It is found in small quantities with sulphur and some sulphur ores, and obtained in the free state as a dark reddish powder or crystalline mass, or as a dark metallic-looking substance. It exhibits under the action of light a remarkable variation in electric conductivity, and is used in certain electric apparatus. Symbol Se. Atomic weight 78.96.
An element that closely resembles sulfur in its properties. The main use in steel is as a free cutting additive but due to high cost its use is limited to stainless steel. One of the benefits being the ability to obtain a very good surface finish on machined components.
A nonmetallic element. Atomic number 34. Atomic weight 78.96. Selenium is a naturally occurring mineral nutrient which is deficient in nearly all US soil east of the Mississippi, and much of the rest of the nation. Selenium deficiency in horses has been implicated in suspensory ligament soreness, poor hoof growth and quality, and dull haircoat. Cascade, Maryland, farrier Henry Heymering suggests 4mg daily supplemental selenium for horses in selenium poor areas. Frogs discolored yellow are a sign of selenium deficiency.
Keywords:  epa
0.10 0.10 1.20 EPA 200.7
0.0050.0050.005 1.20 EPA 270.2
Occurs naturally in food and soils and is used in electronics, photocopy operations, the manufacture of glass, chemicals, drugs, and as a fungicide and a feed additive. Measured in mg/L or ppm. The MCL for selenium is 0.05 mg/L or ppm.
The MCL is 0.05 mg/L. Selenium is associated with hair or fingernail loss, numbness of fingers and toes, and circulatory problems. For freshwater the concentration should be less than 1.5 mg/L.
As A Treatment"...Organic forms include selenomethionine, selenocysteine, amino acid chelates, yeast, and kelp-bound selenium..."
As A Treatment"...Inorganic forms include sodium selenite and sodium selenate..."
As A Treatment"...Selenium is absorbed fairly easily in the upper portion of the GI tract..."
Keywords:  mrl
0.67 0.00006 0.0004 0.005 MRL
A coating for a photoconductor, commonly used on drums and belts in plain-paper, dry-toner copier systems.
A single bath toner used to change black-and-white prints in the developing stage. Selenium tones range from pure black to purple-black to a deep red.
CAS Number: 7782-49-2. A metallic gray solid used heavily in the production of glass, pigments, rubber, metal alloys, petrochemicals and photographic chemicals. Chemical formula = Se. Molecular weight = 78.996 g/mol +/- 3 g.
A finely ground form of an elementary metal; used as a vulcanizing agent in rubber compounds.
Can be added to improve the machinability of certain grades of stainless steel.
A metalloid melting 220°C (428°F) added to stainless steel to improve machinability.
Selenium is a test tool for web applications. The tests are written as HTML tables and can be run directly in a variety of web browsers: Internet Explorer, Mozilla and Firefox. Selenium can be deployed on Windows, Linux, and Macintosh making it one of the most robust testing frameworks.
An oral, plant-derived preparation used for its antifungal properties.
A chemical that is used to tone prints for longevity. Selenium leaves the prints with a silver look. Toned prints are less subject to light damage and oxidization.
Light-sensitive substance which, when used in a barrier-layer construction, generates electrical current when exposed to light. Used in exposure meters. Needs no external power supply.
0.100.10 1.20 200.7
0.000 0.000 0.000 0.000 0.000