SUBJECT INDEX 



071 



Rats, 

 in vitamin Bij assay, 454-455 



vitamin A requirement of, 164-166 



vitamin Bu deficiency in, 490-491 



vitamin Br: requirements of, 513-517 

 Reductinic acid, 2()0, 208, 253, 259, 336 



in ascorbic acid assay, 255-256 

 Reductones, 200, 228, 251, 259, 314, 336 



in ascorbic acid assay, 254-256 

 Rehydrovitamin A, 26, 50 



isolation and properties, 54-55 

 Reproduction, 



biotin and, 601 



vitamin Bp. requirement in, 507 

 Respiration 



ascorbic acid and, 333-334 

 Respiratory chromogens, 231 

 Respiratory tract, 



in scurv}', 300 



in vitamin A deficiency. 111, 148-149 

 Reticulin, 



formation in scurvy, 275 

 Reticulocj'tes, 



in scurvy, 368 

 Retinene, 58, 142, see also Vitamin A 

 aldehj'de 



complexes of, 85 



formation of, 60, 62, 81-83 



identification of, 62-63 



isomers of, 75-82 



reduction of, 66-67, 82 



in rhodopsin synthesis, 47, 72-73, 79 



transport of, 83 

 Retinene-j , 



identification of, 64-66 



preparation of, 66 



structure of, 66 

 3-cis-Retinene, 



bioassays of, 86 

 Retinene reductase, 66 

 Retrovitamin A, 55 

 Rhiotin, 558 

 Rhodopsin, 85, 142 



bleaching of, 60, 62-64 



nature of, 59 



specificity of, 61 



synthesis of, 45-46, 71-75 

 a-Ribazole, 404 

 j3-Ribazole, 404 

 Riboflavin, 117, 447, 487, 507, 508, 575, 602 



ascorbic acid and, 223, 329 



effect on avidin-l)i()1iii (•()ni])lc.\, 557 



malaria and, 611 



relation to vitamin B12 , 404, 450 



tumors and, 610 

 l-a-D-Ribofurano(iiso-5,6-di methyl - 

 benzimidazolo, 



in vitamin B12 , 404-406 

 Ribonuclease, 372 

 Ribonucleic acid, 



in vitamin Bi> assay, 463 

 Rickets, 349-350 



differentiation from scurvy, 375 

 Rods, 



pigments in, 59 

 Rubixanthin, 94 

 Ruminants, see also Cattle 



vitamin B12 requirement of, 521-522 

 Rutin, 



effect on ascorbic acid requirement, 387 



Salivary glands, 298 

 Salmonella, 



biotin and, 611 

 Salmonella paratyphi B, 340 

 Saliva, 



vitamin B12 binding by, 494 

 Salt sickness, 521 

 Schizophrenia, 379 

 Scorbutic rosary, 359, 360 

 Scotopsins, 61, 82 



Scurvy, 112-113, 134, 180, see also As- 

 corbic acid, deficiency 



in children, 358-360 



cvtological aspects of, 301 



diagnosis of, 360-371, 375-376 



gastric function in, 312 



history of, 348-350 



incidence of, 350-351 



pathology of, 371-375, 391-392 



in pregnancy, 344 



prodromata, 351-353 



saturation and tolerance tests for, 363- 

 364 



symptoms of, 271-272, 353-358 

 Seeds, 



ascorbic acid synthesis in, 213-214 

 Semi-|3-carotenone, 19 

 Serine, 425. 439 



deamination of, 582, 585 



