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selenium
selenium
A Dictionary of Food and Nutrition
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2005
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© A Dictionary of Food and Nutrition 2005, originally published by Oxford University Press 2005. (Hide copyright information)
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selenium A dietary essential mineral, which is part of
enzymes glutathione peroxidase and thyroxine deiodinase. Through its role in glutathione peroxidase it acts as an
antioxidant, and to some extent can compensate for
vitamin E deficiency. Similarly, vitamin E can compensate for selenium deficiency to some extent.
Requirements are of the order of 50 μg/day; in parts of New Zealand, Finland, and China soils are especially poor in selenium and deficiency occurs. In China selenium deficiency is associated with Keshan disease. Rich
sources include: fish and shellfish, mung (dahl) and red kidney beans, Brazil nuts, bread, kidney, lentils, liver, pork, rabbit, veal.
Selenium is toxic in excess; mild selenium intoxication results in production of foul‐smelling hydrogen selenide, which is excreted on the breath and through the skin. Intakes above 450 μg/day are considered hazardous.
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Selenium yeast boosts broiler carcass quality: when selenium yeast was supplemented to provide 0.1-0.3 ppm selenium in poultry diets, significant benefits were observed in carcass quality and muscle selenium content.(Nutrition & Health: Poultry)(Report)(Statistical data)
Magazine article from: Feedstuffs; 5/7/2007; ; 700+ words
; ONE of the major biological roles of selenium in broiler chickens is as an antioxidant...glutathione peroxidase in poultry is selenium dependent, and this provides important...conditions (Surai, 2002). Dietary selenium can affect meat quality by decreasing...
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Selenium transfer to nursing piglets studied.(Bottom Line)
Magazine article from: Feedstuffs; 9/25/2006; ; 700+ words
; ...produced throughout the world contain selenium concentrations that vary from deficient...diets with 0.3 parts per million of selenium even though the dietary ingredients supply 0.35 ppm of selenium. The selenium status of newborn piglets...
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Selenium yeast may aid breeder flock performance: organic selenium can improve fertility and increase the duration or persistency of fertility in breeder flocks.(Nutrition & Health)
Magazine article from: Feedstuffs; 7/23/2007; ; 700+ words
; ...glutathione peroxidase in poultry is selenium dependent. This enzyme provides antioxidant...reproductive performance. Therefore, adequate selenium and vitamin E intakes are vitally important, and organic selenium from selenium yeast provides a highly...
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Selenium yeast benefits swine: supplemental selenium yeast in sow diets may lead to several benefits compared to unsupplemented diets or sodium selenite-supplemented diets.(Nutrition & Health: Swine)(Report)
Magazine article from: Feedstuffs; 4/23/2007; ; 700+ words
; ...delivering more of the essential nutrient selenium to the bloodstream. The development and commercialization of selenium yeast, known as selenized yeast in Europe, made an organic antioxidant form of selenium readily available as an alternative...
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Selenium. (Monograph).
Magazine article from: Alternative Medicine Review; 2/1/2003; 700+ words
; ...OMITTED] Until the late 1950s, selenium was believed to be a toxic element...Schwarz and Foltz established selenium as an essential trace element in...prevention of disease. (1) In food, selenium is derived from both vegetable and...
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SELENIUM: WHICH FORM IS BEST FOR LAMBS?
News Wire article from: US Fed News Service, Including US State News; 9/1/2006; 700+ words
; ...article in Agriculture Today: Just like people, sheep need selenium for good health. But people and sheep both require selenium in extremely small amounts. That's because selenium can kill. And the difference between healthful amounts and...
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Organic selenium may aid sows, prewean pigs.(Nutrition & Health: Swine)(Selenium yeast)
Magazine article from: Feedstuffs; 6/26/2006; ; 700+ words
; Selenium yeast is recommended as a replacement supplement for sodium...lactation feeds to improve bodyweight and livability. DIETARY selenium supplemented in the form of organic selenium from selenium yeast, also called selenized yeast, has...
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selenium: are you getting enough?
Magazine article from: Better Nutrition; 11/1/2007; ; 700+ words
; ...IMMUNITY AGAINST THE FLU THE BASICS: Selenium is an essential dietary mineral. Its...by the body. Studies have shown that selenium can help fight infections, maintain...some cancers. ALIAS: Several forms of selenium are found in supplements, including...
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Organic selenium may improve sow, piglet performance. (Nutrition and Health/Swine).
Magazine article from: Feedstuffs; 2/24/2003; ; 700+ words
; ...this respect, natural antioxidants, such as selenium, play an important role in maintaining pig...productivity and reproductive performance. Selenium status Both vitamin E and selenium are normally added to the diet to help prevent...
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Selenium levels should be in forefront of planning. (Nutrition and Health).(Brief Article)
Magazine article from: Feedstuffs; 3/4/2002; ; 700+ words
; ...ABSTRACT After 40 years of supplementing selenium to livestock, it is pertinent to...toward improved methods of supplying selenium, with the result that several alternative techniques are now available. Selenium supplementation of livestock has...
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Selenium
Encyclopedia entry from: Gale Encyclopedia of Alternative Medicine
Selenium Description Selenium is a nonmetallic element with an atomic number of 34 and an atomic weight of 78.96. Its chemical symbol is Se. Selenium is most commonly found in nature in its inorganic form, sodium...
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Selenium (revised)
Book article from: Chemical Elements: From Carbon to Krypton
SELENIUM (REVISED) Note: This article, originally...2006 for the eBook edition. Overview Selenium is a member of the chalcogen family...and sulfur, are found in most ores. Selenium is a metalloid. A metalloid is an element...
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selenium
Book article from: The Columbia Encyclopedia, Sixth Edition
selenium , nonmetallic chemical element; symbol...deg;C; valence -2, +4, or +6. Selenium is directly below sulfur in Group 16 of...properties it resembles sulfur and tellurium. Selenium exhibits allotropy, appearing in a number...
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Periodic Table of the Elements: Selenium
Book article from: The Columbia Encyclopedia, Sixth Edition
Periodic Table of the Elements: Selenium Periodic Table of the Elements: Selenium Atomic Number: 34 Atomic Symbol: Se Selenium Atomic Weight: 78.96 Electron Configuration: 2 · 8 ·&thinsp...
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selenium sulphide
Book article from: A Dictionary of Nursing
selenium sulphide ( sul -fyd) n. a selenium compound with antifungal properties, used to treat dandruff and scalp infections. It is administered in a shampoo. Trade name: Selsun .
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