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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 daily deficient diet deficient in vitamin diet deficient dietary disease dosage dose dried Drummond effect experimental experiments extract factor fat-soluble vitamin foodstuffs fraction gram grms growth growth-promoting guinea-pigs Hess increased infection intestinal investigations irradiated ergosterol Journ juice lesions liver maize McCarrison McCollum mercury-vapour lamp metabolism method mgrms milk normal Nutrition observed Osborne and Mendel osteomalacia pellagra phosphorus Physiol pigeons polyneuritis present Proc produced protein quantity rachitic reaction rice rickets Rosenheim scurvy Sherman showed source of vitamin Steenbock sterol substance suggested symptoms tested tissues toxic vigantol viosterol vitamin A content vitamin A deficiency vitamin B2 weight wheat workers xerophthalmia yeast young rats Zilva