632 



INDEX OF SUBJECTS 



Tripalmitin, 107 

 Tripeptides, 142 

 Tritico-nucleic acid, 178, 183 

 Tropical climate, effects of, 541 

 Trypsinogen, 346-374 

 Trypsin, 151, 184, 205-206, 215, 346, 374 

 action of, on polypeptides, 143 

 effect of peptic digestion on action 



of, 248 



of reaction on, 217 

 mode of action of, 22 

 from mollusc liver, 224 

 specificity of, 220 

 time relations in action of, 210 

 Tryptophane, effect of administration of 



on indican output, 555 

 essentiality of, in diet, 242 



for tissue accretion, 490 

 formula, 135 



reactions given by thrombin, 349 

 Tubularia crocea, temperature-coefficient 



of life duration, 424 

 Twin formation, 469-470 

 Tyramine, 187, 514 



effect of, on blood-pressure, 186 

 Tyrosinase, 369, 413 

 Tyrosine in alcaptonuria, 559 



detoxication of ultraviolet light by, 



433 

 essentiality of, for tissue accretion, 



490 



formula, 134 

 in Millon's reaction, 123 

 putrefaction products of, 556 

 relation of, to adrenaline, 198 



to tyramine, 187 

 separation of, 133 

 as source of tyramine in intestine, 



187 

 ultraviolet spectrum of, 351, 433 



U 



ULTRAVIOLET light, inactivation of en- 

 zymes, 207 



spectrum, 351, 429, 433 



toxicity of, 433 

 Unicellular organisms, 515 

 Uracil, 174, 175 

 Uranium, formaldehyde synthesis by, 



Urates, solubility of, 552 

 Urea, 393 



in artificial parthenogenesis, 446 



blood content of, 337 



excretion of, in phosphorus poison- 

 ing, 543 



formation of, 244 



formula, 541 



origin of, 543 



parathyroid control of formation of, 

 387 



permeability of blood corpuscles for, 

 267 



Urea, production of, in body, 542 

 Uric acid, 176, 412, 548 



elimination of, 553 

 excretion of, by birds, 543 

 reagent, 191, 199 

 test for, 199, 549 

 Uricase, 550 

 Uricolysis, 550 

 Uricolytic index, 551 

 Uridine, 178 

 Urinary pigments, 562 

 Urine, acidity of, 564 

 in diabetes, 405 

 excretion of, by kidney, 291 

 freezing-point of, 261 

 normal composition of, 565 

 properties of, 563 

 specific gravity of, 563 

 Urobilin, 562 

 Urobilinogen, 562 

 Urochrome, 562 

 Uroerythrin, 562 

 Uterine contractions, 379 

 Uterus, action of pituitary extract on, 



199 



creatine content of, in pregnancy, 

 399 



VALENCY of ions in colloid precipitation, 



158 

 rule in precipitation of colloids. 160- 



164 



Valerianic acid, 108 

 Valine, 134 



Van Slyke method of amino-N determi- 

 nation, 144-146 

 of CO2 determination in 



blood, 279 

 Van't Hoff's solution, 318, 447, 463 

 Variability, 380 

 Vas deferens, 376 

 Vasomotor theory of sleep, 530 

 Vaucheria, antagonistic salt effects of, 320 

 Vegetable glue, 599 

 mucilages, 82 

 oils in diet, 489 



in replacement of animal fats, 



577 



proteases, 206 



proteins, amino-acids in, 584 

 Vegetarianism, 583 

 Velocity of constants, 485 

 of forgetting, 533 

 of hydrolysis, 201-218 

 Vinyltrimethylammonium hydroxide, 196 

 Viscosity, effect of, on conductivity, 296 



of temperature on, 418 

 of proteins, effect of ionization on, 



296 



of protoplasm, 295 

 Vital force, 574 

 Vitamines, 189-193, 489 

 Vitellin, glutamic acid in, 136 



