- SUBJECT INDEX 



525 



Nitro reaction for localization of in- 

 doles and related compounds, 74 



Nitrosamino reaction for localization 

 of indoles and related compounds 

 74 



Norberg centrifugation tubes, 167 



Norberg method for phosphorus, 124 



Norberg technique of visible and 

 ultraviolet absorption histospec- 

 troscopy, 120 



Norberg titrimetric method for po- 

 tassium, 268 



Nucleic acids, chemical staining 

 methods, 65 



Oxygen, by gasometric methods, 331 

 by Roughton-Scholander method, 



331 

 calculation in Cunningham-Barth- 

 Kirk differential respirometric 

 method, 318 

 Oxygen-nitrogen-carbon dioxide mix- 

 ture, sample analysis by Scho- 

 lander micrometer burette gas 

 analyzer, 327 

 Oxygen tension iu tissue, calibration 

 and measuring instruments, 406 

 local, microelectrode measurement, 

 404 



O 



Ochoa-Peters method for thiamine 



and cocarboxylase, 394 

 Okamoto method for localization of 



mercury, 24 

 Okamoto-Mikami-Nishida method for 



localization of palladium, 29 

 Okamoto-Utamura method for locali- 

 zation of copper, 23 

 Okamoto-Utamura-Akagi method for 

 localization of gold, 28 

 of palladium, 29 

 of platinum, 29 

 of silver, 26 

 Okkels method, for localization of 



gold, 27 

 Open-tube respirometer. See iJes- 



pirometer. 

 Optical lever respirometr>', 399 

 Organic substances and groups, chemi- 

 cal staining methods, 38 

 Osazone reagent in determination of 



ascorbic acid, 245 

 Oster modification of Feulgen tech- 

 nique, 68 

 Oster-Mulinos method for differentia- 

 tion of "true" and "pseudo" Feul- 

 gen reactions of aldehydes, 65 

 Oster-Schlossman method for amine 



oxidase, 93 

 Ovens, Borsook-Dubnoff type, 181 

 Kirk-Bentley type, 180 

 Linderstr0m-Lang type, 181 

 microincineration, 142 



Packer-Scott method for freezing- 

 drying, 5 



Palladium, chemical staining methods, 

 29 



Pap ammoniacal silver nitrate method 

 for glycogen, 48 



Pectins, chemical staining method, 43 



Pepsin by Linderstr0m-Lang-Holter 

 method, 303 



Peptidase, by dilatometric techniques, 

 417 

 by Linderstr0m-Lang-Lanz dilato- 

 metric method, 419 

 in determination of peptide nitro- 

 gen, 289 



Peptides, racemic, as substrates in 

 determination of proteolytic en- 

 zymes, 303, 304 



Permanganate. See lodometric per- 

 ynanganate method for calcium. 



Permanganate oxidation method for 

 chlorides, 281 



Peroxidase, chemical staining methods 

 for detection, 90 

 use of benzidine in detection, 90 



Phenol (s), alkaline, as reagent in 

 Russell method for ammonia, 238 

 chemical staining methods for, 74 



Phenol-hypochlorite method of Rus- 

 sell, for ammonia, 232 



Phenylurethan in localization of cy- 

 tochrome oxidase, 94 



Phosphatase (s), acid, chemical stain- 

 ing methods, 80-85 



•<v \ 



