548 



INDEX 



Proteins, hydrolyzed, 112 



leaf, 194 



metabolism of, 119, 239, 246, 463 ft 



muscle, 302 



nomenclature of, 113 



properties of, 775 ff 



replacement of. 491 



respiratory quotient of, 505 



shape of, 1 16 



simple, 113 



size of, 116 



storage of, 480 



structure of, 107 



synthesis of, 247. 4S5 ff, 486-493 



utilization of, 463 

 Proteolytic enzymes, 107, 147 

 Proteoses. 115 



Prothrombin. 295-297, 360, 370 

 Protons, 38,40,41, 99, 117 



transfers of. 42 

 Pro topee tin, 185 

 Protoplasm, 13, 14, 20, 46, (178). 77.? 



function of, 14 

 Protoplasmic membrane, 13 

 Protoplasmic streaming, 20 

 Protoplast. 13 



Protoporphyrin biosynthesis, (470) 

 Protozoa, 430 

 Proventriculus, 431 



Proximate analysis, of cereal by-prod- 

 ucts, 411 



of grains. 410 



of hay, 414 



of oil-seed meals, 412 



of packing-house by-products, 419 



of silage, 414 

 Pterin, 344 

 Ptyalin, 424 

 Purines, 120, (121), 123, 295, 334, 468, 



473, 482 

 Putrefaction, 440 

 Putrefactive organisms, 418 

 Pylorus, 425 

 Pyranose, 55, 56, 60, 64 

 Pyridoxal, (340) 

 Pyridoxalphosphate, 228, (340), 460 



function of, 341 

 Pyridoxamine, (340) 

 Pyridoxine, (340), 430 

 Pyrimidines, 120, (121), 123, 334. 473, 

 474 



catabolism of, 474 

 Pyruvate, 110, 170, 222, 330, 342, 449, 457, 



511 

 Pyruvic dehydrogenase, 330 

 Pyruvic kinase, 389 



Quercetin, 199 



Racemic mixture, (52), 53 

 Racemization, (54) 

 Radiant energy, 159, 496 

 Radioisotopes, 398, 402 



biological effects of, 398 

 Rancidity, 84, 359, 419 

 Rayon, 69 

 Reactant, 15 

 Reactions, spontaneous, 100 



velocity, 277 

 Rectum, 438 

 Red blood cells, 89, 346 

 Redtop, 235 

 Reduction, 166 

 Reichert-Meissl number. (87) 

 Rennet. 427 

 Rennin, 147, 155, 427 

 Reproduction, 12, 13, 384. 386 

 Reproductive glands, 321 

 Reserve materials, 188 

 Reserve tissues, 310 ff 

 Resolution, optical isomers, (52) 

 Respiration, 10, 12, 235, 236, 262, 309, 



381 

 Respiratory pigments, 115, 118 

 Respiratory quotients, (504), 505 

 Reticulum, 429 

 Retinene, 353, 354 

 Rhamnose, 73 

 Rheumatism, 316, 319 

 Rhizobia, 226, 228 

 Rhodopsin, 353, 354 

 Ribitol, 72 



Riboflavin, (333), 333 ff, 363, 364, 417, 

 430 



deficiency of, 336, 337 



reduction of, 334 



requirements for, 335 



sources of. 336 

 Ribonuclease, 135 

 Ribonucleic acid, 62, 722 ff, 136 



roles of, 124 

 Ribonucleoproteins. 194, 490 

 a-D-Ribose, (62), 62, 72, 107. 120 ff, 216, 



473 

 D-Ribulose, 216 

 D-Ribulose-5P, 216, 222 

 L-Ribulose, 216 

 Ribulose-l,5-diphosphate, 212 

 Ricinoleic acid, 230 

 Rickets, 327, 328, 355, 357. 358. .363, 372, 



386 

 Ringer's solution. 292 

 Rock phosphate, 378 



