748 



SUBJECT INDEX 



in vitamin K estimation, 411, 413 



mode of action, 428-432 



prothrombin and, 418, 424, 427-428 

 Dienoic acid, conversion to other acids, 



283 

 Diet, 



effect on choline oxidase, 38-39 



effect on choline requirement, 128-129 



efifect on inositol requirement, 383-384 



effect on niacin requirement, 541 



effect on pantothenic acid in tissues, 

 636-637 



in vitamin K deficiency, 421-422 



in vitamin K estimation, 404-405 

 Diethylaminoethanol, in growth of 



microorganisms, 50, 55 

 N,N-Diethylnicotinamide, 



central effect of, 574 



toxicity of, 572, 573 

 Dihydrocholesterol , 



in dehydrocholesterol formation, 158- 

 159 



irradiation of, 138 



occurrence of, 135 

 5-Dihydroergosterol, 136, 183 

 22-Dihydroergosterol , 



as provitamin D, 145-146 



irradiation of, 205 



occurrence of, 154 



synthesis of, 141-142 

 Dihydrositosterol, 135 



irradiation of, 138 



occurrence of, 136 



relation to ergosterol, 158 

 Dihydrotachysterol , 



effect on blood calcium, 207 



properties of, 207 

 Dihydroxyacetone phosphate, 498 



pja-idine nucleotides and, 501 

 3,7-Dih3Tlroxyandrostadiene, 



as provitamin D, 144 



formation of, 142 

 3,4-Dihydroxyanthranilic acid, in niacin 



synthesis, 528 

 1,2-Dihydroxyanthraquinone, vitamin K 



and, 398 

 3 ,7-Dihydroxy-A5-cholenate, 142 

 Dihydroxystearic acid, in vitamin K 



deficiency, 424 

 Dimethylamine, 



formation of, 92 



in choline estimation, 53 

 in growth of microorganisms, 50, 55 

 Dimethylaminoacetic acid, formation 



from betaine, 44 

 p-Dimethyhxminoazobcnzene, DAB, But- 

 ter yellow, choline and, 88-89 

 Dimethylaminoethanol, 25, 40 

 as methyl donor, 28 

 effect in choline deficiency, 68, 70, 128 

 esterification of, 17 

 formation from choline, 10 

 in choline isolation, 6 

 in choline synthesis, 11 

 in growth of microorganisms, 50, 55 

 in perosis, 94 

 methylation of, 23 

 phosphorylation of, 19 

 Dimethylaminoethanol acetic ester, bi- 

 ological activity of, 17 

 2,5-Dimethylbenzoquinone, vitamin K 



and, 398 

 Dimethylethylhydroxyethylammonium 

 chloride, in growth of microor- 

 ganisms, 50 



choline replacement by, 45 

 Dimethyl glycine, 

 formation from choline, 40 

 in choline formation, 41 

 in hippuric acid formation, 41 

 in transmethylation, 25, 28 

 Dimethylpropiothetin, 86 



oxidation of, 43 

 Dimethyl -/3-propiothetin, relation to 



choline, 2 

 Dimethylselenide, excretion of, 45 

 Dimethyl sulfide, in methylation, 51 

 Dimethylsulfone, isolation of, 44 

 Dimethylthetin, 44, 516 

 as methyl donor, 25, 26, 29, 33 

 oxidation of, 43 

 relation to choline, 2 

 Dimethylthetin transmethylase, 26 

 Dimethylvinylamine, formation from 



choline, 10 

 Dinicotinylornithine, 457 



excretion of, 515 

 Dinitrophenylhydrazine, in vitamin K 



estimation, 414 

 Diphenylphosphorylcholine, 12 

 Diphosphoadenosine, in coenzyme A, 

 604 



