Antirachitic vitamin

Antirachitic vitamin Antiredeposition agents Antirust additives Antiscaling additives Antiscorbutic vitamin Antiseize material Antisense agents Antisense DNA... 

The vitamin and metabolic derivatives of a fat-soluble substance calciferol. These antirachitic vitamins are produced from A -unsaturated sterols upon irradiation with ultraviolet light. Population biologists have adduced strong evidence for the hypothesis that lighter skin color, the primary characteristic of race, is related to the lower solar radiance in northern climes. Vitamin D plays a central role in calcium metabolism, both in terms of... 

On the positive side, there are photochemical reactions that are essential for human health. One of these is the formation of vitamin D (the antirachitic vitamin) by irradiation of ergosterol. This photochemical reaction is an electro-cyclic ring opening of the cyclohexadiene ring of ergosterol of the type described in Section 28-2D. The product, previtamin D2, subsequently rearranges thermally to vitamin D2 ... 

Flydroxvlation yields VITD-R agonist 1,25-Dihvdroxyvitamin D3 [antirachitic] Vitamin D deficiency causes rickets — shown by Elmer McCollum... 

Use Antirachitic vitamin when irradiated with UV light, it has vitamin D activity source of estradiol. 

The steroids include a broad-spectrum of important compounds which exhibit remarkable pharmacodynamic properties, namely adrenal cortical hormones, sex hormones, cardiac glycosides, antirachitic vitamins (Vitamin D), toad poisons, saponins, bile acids and some alkaloids. 

Toxicology LD50 (oral, rat) 42 mg/kg poison by ingestion experimental teratogen TSCA listed Precaution Affected by air and light Hazardous Decomp. Prods. Heated to decomp., emits acrid smoke and irritating fumes Uses Rodenticide dietary supplement nutrient animal feed additive pharmaceutical ingred. medicine (antirachitic vitamin) mfg. of human and veterinary specialties for oral and parenteral use... 

Phenylhydrazine antiquing, metal Antimony pentasulfide antirachitic vitamin, pharmaceuticals Cholecalciferol antirachitic, pharmaceuticals Ergocalciferol antiredeposition agent Maleic acid/olefin copolymer, sodium salt Sodium polyacrylate antiredeposition agent, dry cleaning Butylated PVP... 

Because of the possibility of its biosynthesis in the body and its biological function (it is an antirachitic vitamin connected with the metabolism of calcium and phosphorus, which are necessary for growth, development and maintenance of bone structure), some reports state that vitamin Dj is more a hormone than a vitamin. 

The discovery of vitamin D as the antirachitic vitamin and the recognition of fish-liver oils as a potent source led to the advice that babies should receive cod-liver oil or some concentrate of vitamin D. Prevention of rickets and development of strong bones in young children depend on an adequate intake of calcium and phosphorus, as well as vitamin D, and therefore fortification of milk with vitamin D was begun in the early 1930s. The Council on Foods and Nutrition of the American Medical Association approved the fortification of milk. 

The letter D was used to designate the antirachitic vitamin of liver oil (for its physiological action see Chapt. XXII-4). Windaus first prepared vitamin D by irradiating ergosterol and determined its constitution. 

Uses Rodenticide dietary supplement nutrient animal feed additive pharmaceuticals ingred. medicine (antirachitic vitamin) mfg. of human and veterinary specialties for oral and parenteral use... 

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