552 



INDEX 



Vasopressin, 321 

 Vegetables, 415 

 Vegetation, principle of, 3. 4 

 Velocities, 17.21-24 



gas, 22 

 Velocity constants, 144 

 Venoms, 119 

 Verdoglobin, 471 

 Vernalization, (277) 

 Villi, 438 



Viruses, 62. 119, 124 

 Viscosity, 26 

 Vi.sion. 75J, 351 

 Visual cycle, 353 



Vitamin A, 300, 328, 351 If, 358. 363, 364, 

 413,417 



deficiency of, ?5 5 



function of, 353 



requirements for, 354 

 Vitamin A,, (351), 353 

 A'-m-Vitamin Aj, (352) 

 /rfl7i5-Vitamin Aj, (352) 

 Vitamins A3, A3, 351 

 Vitamin B, 328 

 Vitamin Bj. (329) 

 Vitamin B,„ (333) 

 Vitamin Bo, 340 ff 



deficiencies of, 341 



requirements for, 341 

 Vitamin B,„. 345, (346), 374, 375, 383, 



420, 474, 475 

 Vitamin C, 219, 300, 347, 364 



function of, 347 

 Vitamin D, 93, 300, 355 R, 363, 371, 388, 

 417 



deficiency of, 357, 372 



function of, 356 



requirements for, 3'>7 



sources of, 357 

 \'itamin D,, (356) 

 Vitamin D3, (356) 

 Vitamin E, 355, 35S, 391 

 Vitamin K, 297, .559 fF, 366 

 Vitamin K,. (360) 

 Vitamin K,, (360) 

 Vitamin assays, 361 ff 



biological, 362 



chemical, 364 



criteria for, 362 



microbiological, J65 



physical, 364 

 Vitamins, 118, 139, 293, 312, 325, 326 S., 

 (328), 411,420 



and nutrition, 365 



Vitamins, deficiency of, 363 



fat-soluble, 329 



synthesis of, rumen, 430 



water-soluble, 329 

 Volatile fatty acids, 75 

 Von Recklinghausen's disease, 318 



Walden inversion, (54) 

 Waste products, transport of, 291 

 Water, 4. /^. 31. 32. 37, 38, 40, 246, 250, 

 257, 262, 293, 302, 305, 315, 320, 

 599 



absorption of, 292 



as a nutrient, 242 



association in liquid state, 28 



balance of, 296. 3H9. 392 



bound, 15. (30) 



conservation of. 1 II 



phase diagram of. 31, 32 



dissociation of, 36, 40 



dissociation constant of, 40 



excretion of, 321 



hydration of, 15, 112 



photochemical decomposition of, 210 



properties of, 28 



roles of, 27, 101 



solubility of amides in, 108 



structure of, (29) 



vapor-pressure curve for, 23 

 Waterproofing, 25 

 Water-soluble factors, 349 

 Waxes, 74, 78, (92). 92 

 Wetting, 34 

 Wheat, 234, 410 

 Whey 416 



White blood cells, 294 

 Winter hardiness, 31 

 Wood, 69 

 Wound healing, 478 



Xanthine, 334, (473) 



Xanthine oxidase, 334, 335, 382, 386 



Xanthoproteic reaction, 117 



Xylans, 66, 184 



D-Xylose, 62, 184, 216 



D-Xylulose, 216 



Xylulose-5-phosphate, 216, 217 



Zeta potential, 258, 373 



Zinc, 141, 243, 248, 262, 274, 394, 437 



deficiency of, 395 

 Zinc chloride, 235 

 Zwitterions, 98-99 





