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A-deficient diet absorption acid action activity alcohol Amer amount of vitamin animals antimony trichloride antineuritic antiscorbutic avitaminosis bacteria beri-beri Biochem Biol blood bone calcification calcium calcium and phosphorus carotin cells cent cereals changes Chem Chick cholesterol co-workers cod-liver oil colour concentration containing curative daily deficient in vitamin diet deficient digitonin disease dosage doses dried Drummond effect experimental experiments extract factor fat-soluble vitamins foodstuffs fraction gram grms growth growth-promoting guinea-pigs Hess increased infection intestinal investigations irradiated ergosterol Journ juice lesions liver maize McCollum mercury-vapour lamp metabolism method mgrms milk normal nutrition observed obtained Osborne and Mendel osteomalacia oxidation pellagra phosphorus pigeons polyneuritis present produced protein quantity rachitic reaction rice rickets Rosenheim scurvy Sherman showed solution source of vitamin Steenbock sterol substance suggested symptoms tested tissues toxic vegetable vigantol viosterol vitamin A content vitamin A deficiency vitamin B2 weight wheat workers xerophthalmia yeast young rats Zilva