INDEX OF SUBJECTS 



621 



Hydrogen electrode, 154, 273 



ions, as cytolytic agent, 452 



in membrane formation, 450 



peroxide, 362, 412 

 Hydrolysis, 131 



in development of tissue, 460 



in living tissue, 365 



of proteins, products of, 130, 155 



temperature effect on, 417 



velocity of, 201-223 

 Hydrolyzing enzymes, 201-226 



synthetic action of, 221 

 /3-Hydroxy-a-amino propionic acid, 134 

 Hydroxyaromatic derivatives, metabol- 

 ism of, in diabetes, 409 

 Hydroxybutyric acid in diabetic urine, 



405 



in oxidation of fats, 408 

 Hydroxyhexahydrophthalic acid, 104 

 Hydroxyl ions, concentration of, 273 



as cytolytic agents, 452 

 a-Hydroxypyridine, 192 

 Hydroxy-a-pyrrolidine carboxylic acid, 



135 



Hymenoptera, wax production by, 1 12 

 Hypaphorine, 190 



Hyperpituitarism, glycosuria in, 400 

 Hyperpriea, 366 

 Hyperthyroidism, 386 

 Hypertonic sea water, 461 



in artificial parthenogene- 

 sis, 446, 449 



solution, 264, 266 

 Hypnosis, 522 



definition of, 531 

 Hypnotoxin, 532 

 Hypophysectomy, 498 

 Hypopituitarism, sugar tolerance in, 400 

 Hypotheses in science, 22-44 

 Hypotonic solutions, 266, 459 

 Hypoxanthine, 176, 177, 179 



enzymatic oxidation of, 412 



formula, 549 



in oocytin, 455 

 Hysteresis in reversible gels, 299 



ICTERUS, 105 

 Identical twins, 469 

 Iminazole ring, 66 



Iminazolyl group, essentiality of, in diet, 

 489 



radical, 176 



in tethelin, 117 



/3-Iminazolyl-a-aminopropionic acid, 135 

 jS-Iminazolylethylamine, 381 



in intestinal mucosa, 373 

 Immunity, 188 

 Inactivation of enzymes, 216 

 Incubation, osmotic pressure of eggs dur- 

 ing, 261 



India rubber, inosite in leaves of, 96 

 sponge structure of, 298 



Indican, 554 

 Indicator method, 275 

 Indigo from indican, 555 

 Indole, 124, 186 



group, essentiality of, in diet, 489 

 jS-Indole-a-aminopropionic acid, 135 

 Indolethylamine, physiological action of, 



187 



Indoxyl, 67 



Indoxylglucuronic acid, 67 

 Infantile growth cycle, 475 

 Infants, extra-uterine growth of, 476 

 Infraproteins, 130 



synthesis of, 224 

 Infundibulum of pituitary, 199 

 Inhibitive factor in growth, 480 

 Inorganic environment, 310-327 



salts, action of, .on protoplasm, 311 

 precipitation and coagulation of 

 proteins of, 158 



sulphates, 559 

 Inosinic acid, 174, 178, 179 

 Inosite, 93, 95, 117 



oxidation of, in diabetes, 404 

 Insecta, chitin in exoskeleton, 88 



rhythmic contraction of, in intes- 

 tines, 313 



Insoluble serum globulin, 339 

 Intermediate metabolism of carbohy- 

 drates, 391-399 

 of fats, 399-412 

 Internal phase of a gel, 300 



secretion, 489 



work, muscle tonus in, 392 

 Interstitial cells of testes, 376 

 Intestine, absorption of, 250 

 Intestinal epithelium, one-sided permea- 

 bility of, 291 

 selective absorption by, 246 



putrefaction, 560, 563 

 on flesh diet, 586 



stasis, 555 



worms, anti-enzymes in tissues of, 



226 



Intravascular clotting, 343 

 Inulin, 71, 82, 86 



in diabetes, 404 

 Inulinase, 86 

 Inversion of sugar, 77 

 Invertase, 78, 204, 207, 215 



absence of, from digestive juice, 229 



specificity of, 219 



time relations in action of, 209 

 Iodine in marine algse, 329 



number of fats, 110 



reaction for adrenaline, 198 



in thyroid, 50, 329, 384 

 lodothyrin, 384 



lonization of proteins, 157, 296 

 Iron in anemia, 44 



content of foods, 47 



as foodstuff, 43 



in nucleoproteins, 129 



in oxidizing enzymes, 413 

 Irreversible coagulation, 131 



