THE VITAMIN B COMPLEX 



Idosaccharic acid, 566. 



Imidazole, 5 - jS - hydroxyethyl - 4 - 



methyl-, 119. 

 2-Imidazolidone, 5-methyl-, 452. 

 — , 4 - methyl - 5 - (c - sulphoamyl) - , 



454- 

 2 - Imidazolidone - 4 - w - hexoic acid, 

 450, 452, 453. 



. 5-ethyl, 450, 452. 



, 5-methyl. See Desthiobiotin. 



, 5-methyl-2-thio-, 449, 452. 



2 - Imidazolidone - 4 - propionic acid, 



a-isopropyl-5-methyl-, 450, 452. 

 Indole, 242, 281, 335, 336. 

 Indole-3-acetic acid, 241, 242, 244, 255, 



286. 

 Infantile beriberi, 91. 

 Infected animals, effect of aneurine 

 deficiency on, 51. 



, — biotin deficiency on, 429. 



, — folic acid deficiency on, 492. 



, — inositol deficiency on, 574. 



, — pantothenic acid deficiency 



on, 369. 



, — pyridoxine deficiency on, 320. 



, — • riboflavinedeficiency on, 171. 



Influenza virus, 52. 

 Inosamine, 579. 

 Inositol 



analogues of, 579-581. 



animal and human requirements of, 

 575-576. 



chemical constitution of, 565-567. 



effect of deficiency in animals, 572- 



575- 



man. 575. 



estimation of, 568-570. 



function of, 581. 



in higher plants, 578. 



in nutrition of micro-organisms, 

 577-578. 



intestinal synthesis of, 577. 



isolation of, 565. 



metabolism of, 576-577. 



occurrence of, 570-572. 



properties of, 568. 



recognition as a vitamin, 404, 564. 



requirements of insects, 578-579. 



synthesis of, 566. 

 Inositol, monoacetyl-pentamethyl-, 578. 

 d-Inositol, 579, 581. 

 /-Inositol, 579, 581. 

 Inositol hexaphosphoric ester, 570. 



— hexaacetate, 568, 579. 



— monophosphoric ester, 570, 580. 



— tetraphosphoric ester, 580. 



— triphosphoric ester, 570. 

 Inosose, 566, 579. 



Insects, ^-aminobenzoic acid require- 

 ments of, 560. 



Insects, aneurine requirements of, 115- 



116. 

 — , biotin requirements of, 441-442. 

 — , choline requirements of, 597. 

 — , folic acid requirements of, 512-513. 

 — , inositol requirements of, 578. 

 — , nicotinic acid requirements of, 287, 



294. 

 — , pantothenic acid requirements of, 



389. 

 — , pyridoxine requirements of, 341- 



34^. 

 — , riboflavine requirements of, 205- 



206. 

 Insulin, 392, 602, 616, 617. 

 Intestinal synthesis, 6, 77, 78, 552. 

 of />-aminobenzoic acid, 77, 78, 



554- 



aneurine, 74-81, 84. 



biotin, 77, 78, 434-436. 



folic acid, 77, 78, 463, 487, 488, 



505-506, 510. 



inositol, 577. 



nicotinic acid, 268-272. 



pantothenic acid, 376-377. 



pyridoxine, 327-328. 



riboflavine, 1 83-1 86. 



Intracellular symbiotic micro-organisms 



in insects, 115, 205, 287, 342, 390. 

 Intrinsic factor, 498, 499, 543. 

 Iron porphyrin, 629. 

 Isoalloxazine, 5:6- benzo - 9 - (L - i' - 

 arabityl)-, 207. 



— , 9-(D-i'-ribityl)-, 207. 



— , 6:7- dichloro - 9 - (D - i ' - ribityl) -, 



208. 

 — . 3 ■. 9-dimethyl-, 137. 

 — , 6:7- dimethyl - 9 - (y - amino - jS - 

 hydroxypropyl)-, 209. 



— , 9-(L-arabinosido)-, 207. 



— ,5:7- dimethyl - 9 - (L - i' - arabityl)-, 



207. 

 — , 6:7- dimethyl - 9 - (L - i '-arabityl)- 



138, 206, 207. 

 — , 6:8- dimethyl - 9 - (L - i '-arabityl) - 



207. 

 — , 6:7- dimethyl - 9 - (D - i ' - desoxy- 

 ribityl)-, 207. 



— , 9-(D-i'-dulcityl)-. 208. 



— , 6 : 7-dimethyl-9-(r)-i'-lyxityl)-, 207. 



— , 4 : 5-dimethyl-9-phenyl-, 209. 



— , 6:7- dimethyl - 9 - (L - I'-rham- 



nityl)-, 207. 

 — , 5:6- dimethyl - 9 - (D - i ' - ribityl)-, 



207, 208. 

 — , 5:7- dimethyl - 9 - (D - i ' - ribityl)-, 



207. 

 — , 6:7- dimethyl - 9 - (D - i ' - ribityl)-. 



See Riboflavine. 

 — , 9- (L-i '-ribityl)-, 207. 



674 



