custody
发表于 2025-3-23 13:20:30
Pantothenic acid,t. Williams named the substance pantothenic acid because of its apparently widespread occurrence (Greek ., everywhere). Pantothenic acid was recognized as a vitamin for animals in 1939, when Jukes and Wooley independently reported that pantothenic acid isolated in pure form from liver by R.J. Willia
Abduct
发表于 2025-3-23 14:06:44
Biotin,aw egg white in experimental diets produced a characteristic ‘spectacle-eye’ hair loss and dermatitis in rats. The causative factor later proved to be avidin, a glycoprotein component of egg white, which binds biotin and renders it biologically unavailable to the rat. Boas in 1927 and later György i
vascular
发表于 2025-3-23 18:51:13
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菊花
发表于 2025-3-24 01:23:47
Vitamin B12,as not until 1926 that Minot and Murphy started to cure patients suffering from pernicious anaemia by feeding them with large amounts of raw liver. In 1929, Castle showed that the intestinal absorption of the ‘antipernicious anaemia principal’ required prior binding to a specific protein (intrinsic
opinionated
发表于 2025-3-24 04:03:28
Vitamin C,, in 1753. The concept of an antiscorbutic vitamin was postulated by Casimir Funk in 1912 after Holz and Fröhlich in 1907 induced the disease in guinea pigs. By 1924, Zilva had obtained concentrates of the antiscorbutic factor from lemons and showed that the factor possessed strong reducing properti
易达到
发表于 2025-3-24 07:29:13
https://doi.org/10.1007/978-3-7618-7010-5ed as a growth factor for yeast, and which they named biotin. Independent research conducted by György and du Vigneaud led to the conclusion in 1940 that the above curative and growth factors were chemically identical to each other. The structure of biotin was established in 1942 by du Vigneaud’s group.
RADE
发表于 2025-3-24 10:46:18
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Mundane
发表于 2025-3-24 16:45:09
t effective way possible. Surveys based on food intakes and food compositional data are being conducted with the object of establishing recommended intakes of vitamins. These recommendations are constantly being changed as new knowledge comes to light. Analytical techniques using physicochemical and
guzzle
发表于 2025-3-24 19:40:55
Johann Jakob Bachofens Geschichtsdeutungdue to the absence of the fat-soluble A in the diet. In the meantime it was discovered that green vegetables also possess fat-soluble A activity and in 1930 Moore provided evidence that carotene was converted to vitamin A in the body. The biochemical function of vitamin A in vision was established by Wald in 1935.
Provenance
发表于 2025-3-25 01:54:11
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