INDEX 



465 



Pyridoxamine, 243 

 Pyridoxamine phosphate, 243 

 Pyridoxine : 



food sources, 244 



formula. 242 



physiol()5;ical function, 241 

 Pyrimidines, 154-157 



formuhi of, 155 



list of, 154 

 Pyrithianiine, 256 

 I'yroxylin, G2 

 Pyrrole. 390. 391 

 Pyi-uvic acid : 



conversion to oxalacetic acid, 332 



formation during glycolysis, 32S. 329 



from glucose, 330 



in thiamine deficiency, 227 



metabolic oxidation of, 330-334 

 Pyruvic acid enolphosphate, 329 

 Pyruvic acid oxidation, energy from. 421 

 Pyruvic oxidase, 266, 274 

 Pyruvic transaminase, reaction catal.vzed 

 by, 343 



Q 



Q-enzyme, 399 

 Quinolinic acid, 347 

 R 



Rachitic rosary, 210 



Radioactive carbon isotopes as metabolic 



tracers, 288, 396, 397 

 Radioautography, 396 

 RafBnose, 49 

 Rancidity, 90 



hydrolytic, 90 



oxidative, 90 

 Rayon, 62 



Redox potential, definition of, 419 

 Reducing sugars, 31 



determination in foods, 31 



effect of alkali on, 31 

 Reductive amination. 401 

 Relaxin, 295 

 Renal threshold, effect of phlorizin on, 



302 

 Renin, 265, 304, 314 

 Reproduction, relation of vitamin E to, 



216, 217, 219 

 Resorcinol test for ketoses. 36 

 Respiration : 



definition of, 323 



of animals, effect of cyanide on. 334 



of plants, 404. 405 

 Respiratory quotient, 425 

 Retinene, 204 

 Rhamnose, 38 

 Rheumatoid arthritis, effect of cortisone 



and ACTH. 292 

 Rhizobia, in root nodules, 403 

 Rhizopterin, 247 

 Nhi::opi(i!i nigricans, 363 

 Rhizopus orijzae, 363 

 Rhizopus sp., 363 

 Rhodo»iicrohium and nitrogen fixation, 



403 

 Rhodopbin, 140, 204 



Rhodospirillum and nitrogen fixation, 403 

 Ribitol, 21 

 Riboflavin : 



chemical properties, 233, 234 



determination of, 234 



food sources, 234 



formula, 234 



human requirements, 235 



in foods, table, 447^48 



light destruction of, 234 



physiological functions, 232, 233 

 Riboflavin adenine dinucleotide (FAD), 



277 

 Riboflavin coenzymes. 277 

 Riboflavin mononucleotide (FMX), 277 



role in tissue oxidation. 282 



structure of, 276 

 Riboflavin-5'-phosphate, 159, 277 

 Ribonuclease, 126 

 Ribonucleic acid, 154 

 Ribose, 27 



Ribose, nucleic acids and, 154. 156-158 

 Ribose-3-phosphate. in vitamin Bja, 250 

 Ribose-5-phosphate. 380 

 Ribulose, 397, 398 

 Ribulose-5-phosphate, 380 

 Ricinoleic acid. 80 

 Rickets : 



occurrence of. 212 



relation of sunlight to, 212 



symptoms, of, 210 

 Robison ester (see D-Glucose-6-phosphatp) 

 Root nodules, 403 

 Running fits in dogs, 257 



S 



Saccharic acid, 22 



Saccharimeter, determination of sucrose 



with, 45 

 Haccharom ijces cerevisiae : 



fermentation products of, 363 



growth efficiency of, 360 

 Saliva : 



amylase in, 311 



composition of, 311 



secretion, 312 

 Salivary amylase, 263 

 Salmine. 111. 126 

 Salt depletion, 12 

 Salt metabolism, effect of cortical steroids 



on, 291 

 Salt, i-equirement, 1S2 

 Saponification, 73 



of fats, 86 

 Schiff's reagent, 25. 27 

 Scurvy, 223 

 Secretion, 308, 316 

 Secretogogues, 308 

 Sedoheptulose, 21. 380. 397. 398 

 Selenium poisoning. 195, 196 

 Semiessential amino acids, 341, 342 

 Serine : 



formation from glycine, 344, 345 



formula, 116 



metabolic reactions involving, 344, 345 

 Serine phosphate, 319 



