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单词 p-p
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P-P
P-P n. (also PP) Medicine pellagra-preventive or -preventing (formerly, a designation of the vitamin now called niacin).
ΚΠ
1925 J. Goldberger & W. F. Tanner in Public Health Rep. (U.S. Public Health Service) 40 77 It would seem as if the heretofore unrecognized pellagra-preventive factor, to which we shall hereafter refer as factor P-P, were capable of preventing the disease with little if any cooperation from the protein factor of the diet.
1942 F. Bicknell & F. Prescott Vitamins in Med. v. 259 Nicotinic acid was at first hailed as the PP or pellagra preventing factor, but it is now known that pellagra is a multiple deficiency disease and that lack of nicotinic acid is only one of the factors in its causation.
1967 H. A. Guthrie Introd. Nutrition xii. 240/2 Niacin, another water-soluble vitamin identified with the B complex, has been known as nicotinic acid and as the pellagra preventative (P–P) factor.
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