SUBJECT INDEX 



GGl 



Cytosine, 459 



Cytosine desoxyiihoside, 481 



Daricr's disease, 152 



vitamin A therapy of, 159-160 

 Dccaprcnocarotenes, 24 

 Decarboxylation, 



biotin and, 577-581 

 Dehydroascorbic acid, 180, 181, 213,225- 

 227,253,298,334,376 



concentration in tissues, 228-229 



diabetofiienic effect of, 241, 345-346 



effect on urease, 239 



formation of, 184, 202-203 



in ascorbic acid estimation, 242, 250- 

 253 



reactions of, 204-205 



relation to glutathione, 232-235 



reduction of, 228-236 

 Dehydroascorbic reductase, 233, 236 

 Dehydrogenase, 214 

 Dehydro-/3-ionone, 52 

 Dehydrovitamin A, 45, 52 

 Dental caries, 



relation to ascorbic acid, 283 

 Dentine, 114, 273, 304, 373, 381, 382 



in scurvy, 282-283 

 Dermatitis, 



in biotin deficiency, 589, 593, 600-001, 

 602, 604-605, 613 

 3-Desoxy-6-carboxy-D-araboascorbic 



acid, 192 

 3-Desoxj'-6-carboxy-L-ascorbic acid, 192 

 Desoxj'corticosterone, 347, 380 



avidin and, 608 

 3-Desoxy-L-gluosaccharoascorbic acid. 



antiscorbutic activity of, 199 

 Desoxjribonucleic acid, 302, 459 



vitamin B12 and, 443 

 u-2-Desoxyribose, 



in growth of Lactubacillus, 481 

 Desoxyril)osides, 399, 424, 465, 472 



formation of, 432 



in growth of bacteria, 450, 459, 460, 

 464, 466-467, 484 

 Desoxyribotides, 



in growth of Lactobacillus, 481 

 Desthioi)iotin, 539-544, 561, 577, 580 



biological activity of, 562-564, 015, 610 



inhibitory effects of, 560-567 



synthesis of, 549-551 

 Detoxification, 



ascorbic acid and, 341 

 Devergio's disease, 



vitamin A therapy of, 160 

 Dextran, 



relation to biotin, 565 

 Dextrin, 



effect on l)iotin synthesis, 588 

 Diaminopelargonic acid, 540-541 

 mfSO-Diaminosuccinic acid, 



in ])iotin s\-nthesis, 572 

 3,4-Diaminotetrahydrothiophene, 538 

 Diazomethane, 191 



reaction with ascorbic acid, 185, 186, 

 187 

 l,2-Dichloro-4,5-diaminobenzene, 



as antimetabolite, 487 



effect on vitamin B12 production, 447 

 2 , 6-Dichlorophenolindophenol , 



extraction of, 256-257 



in ascorbic acid estimation, 248-250 



in diagnosis of scurvy, 364 



reduction of, 229-230 

 €-(2,4-Dichlorosulfanilido) caproic acid, 



as inhibitor, 571 

 Diethylstilbestrol , 



effect in biotin deficiencj% 608 

 Diet(s), 



effect on ascorbic acid requirement, 387 

 on retention, 336-337 



scorbutigenic, 381 



in vitamin B12 assay, 452-453, 454-455 

 /rons-Dihydromuconj-l chloride, 21 

 Dihydroquinoxaline, 537-538 

 5,6-Dihydroxj^-/3-carotene, 19 

 Dihydroxymaleic acid, 186, 200 



in ascorbic acid assay, 255 

 Dihydroxyphenylalanine, 374 

 2 , 3-4 , 6-Diisopropylidene-2-keto-L- 



gulonic acid, 195-197 

 2,3,4,6-Diisoj)ropylideiie-L-sorbofur- 

 anose, 



in ascorbic acid synthesis, 210-211 

 2,3-Diketogulonic acid, 213, 253, 376 



formation of, 232 

 2,3-Dikoto-i.-gulonic arid, 251-252 



antiscorbutic activity- of, 199 

 2,3-l)ikoto-i.-gulorio-7-lactone, 225 



antiscorbutic activity of, 198-199 



