INDEX OF SUBJECTS 



625 



Nitrous acid, action of, on amino-acids, 



138 



Normal diet, 582 



Nuclear material, synthesis of, 462 

 Nuclease, 178 

 Nucleic acids, 173-183, 463, 549 



glucosides of, in decomposition 



products, 90 

 in growth, 494 

 iminazole ring in, 66 

 in nucleoproteins, 128 

 as source of phosphorus in food- 

 stuffs, 50 

 structure of, 178 

 Nuclein, 129, 173 



iron content of, 43 

 Nucleohistone, 128 

 Nucleoproteins, 128, 173 



iron content of, 43 

 a-Nucleoproteins, 179 

 /8-Nucleoproteins, 173, 179 

 Nucleosides, 90, 178, 455 

 Nucleotids, 178-183 

 Nutrient level, 485, 487, 501, 502, 515, 



547 

 Nutrients in growth, 484 



partition of, 500 

 Nutrition of children, 590 

 of plants, 320 



OBERMULLER'S reaction, 99 

 Obesity, 512 



cures, 385 



Octadecapeptide, 142 

 Oils, effect of, on surface tension, 284 

 Old age, 512 

 Oleic acid, 108 

 Oligodynamic action, 328 

 Olive oil, 111 



effect of, on surface tension of 



water, 285 

 emulsifying action of alkalies 



on, 286 

 One-sided permeability, 289, 329 



in kidneys and intestinal epi- 

 thelium, 291 

 Ontogeny, 261 

 Oocytin, 455 

 Optical activity, 54, 435 

 Optimum temperature for enzyme action, 



213 



Orcin reaction, 62 



Organs of generation, chemical correla- 

 tion of, 376-381 

 Ornithine, 562 



in benzoic acid elimination by birds. 



558 



formula, 544 

 Ornithuric acid, 558 

 Oryzenin, 126 

 Osazones, 60 

 crystals, 61 

 40 



Osmometer, 258 



Starling's, 302 



Osmosis, time relations of, 265 

 Osmotic pressure, 166 



in assimilation and excretion, 39 

 of cell contents, 263-268 

 methods of estimating, 260 

 of protein solutions, 302 



effect of salts on, 303 

 of sea water, 446 

 of tissue fluids, 255-263 

 Osteomalacia, 43 

 Ovary, 377 

 Ovomucoid, 457 



coagulation and precipitation of, 168 

 Ovovitellin, 129 

 Ovulation, 378 

 Oxalated blood, 342 



plasma, 344 

 Oxalic acid, 541 

 Oxidases, 206 



artificial, 596 

 Oxidation of linseed oil, 111 



spontaneous, autocatalytic nature 



of, 439' 

 Oxidations in central nervous system, 



501 



in living tissues, 365 

 in sea urchin eggs, 461 

 Oxidizing enzymes, 215, 412-414 

 Oxygen consumption by different ani- 

 mals, 587 

 in eggs, effect of fertilization on. 



459 

 temperature coefficient of, 



423 



Oxygenase, 413 

 Oxyhemoglobin, 366 



crystals from various animals, 358 

 p-Oxyphenylacetic acid, 558 

 p-Oxyphenylpropionic acid, 558 

 Oxyproline, 135, 356 

 Oxyproteic acids, 562 



PALMITIC acid, 108 



oxidation of, in body, 409 

 Pancreas, autolysis of, 177 



effect of extirpation of, 401 

 Pancreatic juice, 200, 229, 232 



hydrogen ion concentration of, 



275 

 quantitative laws of hydrolysis 



by, 251 

 time relations of flow of, in 



digestion, 372 

 Papain, 214 

 Parabamic acid, 177 

 Paracasein, 130, 345 



formation of, by gastric juice, 248 

 /3-Parahy droxyphenyl-a-amino propioni c 



acid, 134 

 Parahydroxyphenylethylamine, 186-187 



