INDEX 



729 



"Coreductase," 133 



Corn, pellagragenic agent in, 280, 292 

 Cotransaminase, 177 

 "Cotryptophanase," 177 

 Cow-manure factor, 14, 421 

 "Cozymase," 132, 133 



in sex hormone inactivation, 382 

 Crustacea, B vitamin requirements of, 



309 

 Customs, effect on B vitamin require- 

 ments, 282 

 Cuttings, B vitamin requirements of 



plant, 316 

 Cysteic acid, taurine from, 181 

 Cystic mastitis, B vitamin treatment of, 



382 

 Cytochrome-C, 152 



reduction mechanism, 152-153 



reoxidation, 153 

 Cytochrome-C reductase, 32 



oxidation of reduced TPN by, 150 

 Cytochromes (see also porphyrins), 



absorption spectra, 151 



Daily dietary allowances of B vitamins 



for humans, table of, 324 

 "Dark reactions," 238 

 Deamination, biotin as catalyst for, 172- 



173 

 Decarboxylation, 



of amino acids, 181 



of keto acids, enzymes for, 153 et seq. 

 /3-decarboxylation, biotin in, 154, 171 

 Decarboxylase processes, 153, et seq. 

 Deficiency states of B vitamins, 395 et 

 seq. (See also individual vitamins) 



beriberi, 398-406 



compound, 396 



criteria, 248 



in higher animals, 398 et seq. 



in insects, 312-313 



in lower forms of life, 397-398 



in primitive tribes, 296 



in young ruminants, 298 



muscular activity in, 399 



pathology from, 395 



pellagra, 398, 408-412 



subclinical, 396-397 



symptomology, 248 et seq., 396 

 Definition of B vitamins, 5 

 Dehydration-hydration, in glycolysis, 219 

 Dehydrogenation, 



enzymes in, 129 



in glycolysis, 219 

 Deprivation of B vitamins, effect on in- 

 sects, 312 

 Dermal excretion of B vitamins, 368-369 

 Desthiobiotin, 468, 543, 550-552 

 Desoxycorticosterone, relation to panto- 

 thenic acid, 381 

 Desoxypentoses, 



from carbohydrates, 223 



Desoxypentoses — Continued 



mechanism of formation, 224 

 Desoxyribosides, Vitamin Bi« activity of, 



205 

 Destruction of B vitamins in intestine, 



337-338 

 Detoxification of amines, 106 

 Diacetyl, dismutation of, 166 

 Diaphorases, 149 

 Dietary surveys, 252-254 

 Diets, 



controlled, 247 et seq. 



special, use of in study of intestinal 

 syntheses, 298 



vitamin B content of mixed, 254 

 Digestion, 



in animals, 338-343 



in plants, 336-338 

 Dihydroluciferin, 238 

 3,4-dihydroxyphenylalanine, 181 

 3,4-dihydroxyphenylethylamine, forma- 

 tion of, 181 

 Dimethylethanolamine, 290 

 Dinicotinyl ornithine, 287, 357 

 Diphosphopyridine nucleotide, 



structure of, 132 



as hydrogen acceptor in glycolysis, 219 

 Diphosphothiamine, 154 

 Disease, effect on B vitamin require- 

 ments, 273 

 Dismutation, 



acetic acid-lactic acid, 164 



diacetyl, 166 

 Distribution of B vitamins, 18 et seq., 

 345 et seq. (See also individual vita- 

 mins) 



in body fluids, 350-351 



in body tissues, 350-351 



in circulating blood, 345-347 



in human tissues, 26 



in milks, 347-350 



in tumors, 27 



quantitative relationships, 23 



significance of, 24-25 



uniformity of, 25 

 Dogfood, vitamin B content of, 254 

 Domestic birds, Vitamin B requirements 



of, 328 

 DOPA, 181 

 DOPA decarboxylase, 182 



relation of coenzyme of, to folic acid, 

 204 

 DPN, 133 



oxidation of reduced form by dia- 

 phorases, 149 



ratio of reduced to oxidized form in 

 malignancy, 138 

 DPT, 154 



Dropsy, epidemic, 400 

 Dulcitoflavin, 296 



