INDEX 



515 



Manganese deficiency 

 effect of 



on photoreduction, 243-247. 

 on photosynthesis, 243-247. 

 reversal of, 247. 

 Manometry, diffusion factor in, 407. 

 Medicago saliva, Hill reaction activity 



of, 280. 

 Membranes, interlamellar. See Inter- 

 lamellar membranes. 

 Metabolism, of photosynthetic tissues, 



149-162. 

 Methemoglobin, reduction by chloro- 



plasts of, 263. 

 Methyl bacteriochlorophyllide, infrared 

 absorption spectra of, 39, 41, 

 42-44. 

 Methylene blue 



energy yield in sensitization by, 55. 

 as inhibiting agent, 298. 

 photoreduction in the presence of 



EDTA of, 51. 

 quantum yield of fluorescence of, 

 53-54. 

 Mitochondria, separation from chloro- 



plasts of, 271. 

 Molecular oxygen, in back reaction, 



270. 

 Molecular weight, of protochlorophyll 



holochrome, 472. 

 Molisch test. See Chlorophyll reactions 



in vitro, phase test. 

 Myoglobin, reduction of, 191. 



Natural chlorophyll, isolation of, 464- 



465. 

 Nitrate reduction 

 effect of glucose on, 251. 

 O2 evolution in, 251. 

 photochemical, 250-255. 

 intensity dependence of, 250. 

 effect of CO2 on, 252-253. 

 Nitrite, as Hill reagent, 252-253. 

 Nitrite reduction, 251-255. 

 by Ankistrodesmus 

 in dark, 253. 



photochemical, 250-254. 

 effect of ATP on, 254-255. 

 effect of cytochrome c on, 255. 

 effect of DNP on, 254-255. 

 O2 evolution of, 251. 

 by Chlorella, 255. 

 Nitrobenzene, reduction bj^ leuco dye 



of, 51. 

 Nitrogen, effect on background CO2 

 fixationof, 206-207, 211. 



Obligate anaerobes, 174-178. 

 Obligate photoanaerobes, 149. 

 Ochromonas nialhamensis 

 CO2 fixation by, 240-241. 

 growth by photoreduction of, 240. 

 photoreduction by, 239-242. 

 utilization of isopropyl alcohol by, 

 240-241. 

 Optical density. See also Absorption 

 spectrum. 

 of cell suspensions, 100, 106. 

 of cytochromes, 181-182, 189. 

 effect of hydrosulfite on, 189. 

 effect of reducing agents on, 195- 

 196. 

 measurement of, 59-67. 

 calibration for, 61. 

 of Chlorella, 64-65, 70. 

 Osmotic pressure, in leaf sap, 282-283. 

 Oxidants. See also Primary hydrogen 

 acceptor. 

 suitability in Hill reaction of, 378- 



383. 

 reduction by chloroplasts of, 250- 

 262, 378-383. 

 Oxidation 



of chlorophyll, 360. 

 of cytochrome c, 179-182. 

 of cytochromes, 174-178. 

 Oxidation-reduction reactions 



as cause of reversible bleaching of 



chlorophyll, 35. 

 of cytochromes, 179-182, 189. 

 Oxidative metabolism, transients in, 

 437. 



