508 



INDEX 



Chloromalium (Continued) 



dark fixation of phosphate by, 335. 

 dark phosphorylation by, 311. 

 initial acid uptake of, 455-456. 

 oxidation of cytochromes upon near- 

 infrared irradiation of, 174- 

 178. 

 photophosphorylation by, 311-312. 

 transients in 



acid gush of, 452-455. 

 initial acid uptake of, 454. 

 Chromatium cytochrome, 154, 174. 

 Chromatium D, 153-155, 174-178, 450. 

 Chromous chloride, reducing agent, 54. 

 CO-binding pigment, 178, 195, 319. 

 Coenzyme I. See DPN, Pyridine 



nucleotides. 

 Cofactors 



for CO2 fixation, 290. 

 for photophosphorylation, 303, 311, 

 340-343. 

 Collimated light, transmission by cell 



suspensions of, 104. 

 Colloidal chlorophyll, scattering of light 



by, 103. 

 Compensating light beam, for measur- 

 ing absorption changes, 60, 

 185-186. 

 Compensation, range of. See Compensa- 

 tion point. 

 Compensation effect 



duration during induction periods of, 



349, 399, 433-435. 

 as normal occurrence, 399, 438. 

 Compensation point 



efficiency of photosynthesis above, 



349-352, 353, 399. 

 efficiency of photosynthesis below, 



349-352. 

 efficiency of photosynthesis near, 

 349-352, 430. 

 for Chlorella pyrenoidosa, 349-351. 

 quantum yield of photosjoithesis 

 near, 349-352, 406. 

 Concentration depolarization, 6. 

 Concentration quenching, in chloro- 



phylls a and b, 7. See also 

 Quenching. 

 Continuous culture ajjparatus, 485. 

 Conversion, internal. See Internal con- 

 version. 

 Crystalline chlorophyll, scattering of 



light by, 103. 

 Cyanide 

 effect of 



on CO2 acceptor, 218. 

 on CO2 fixation, 214-223. 

 on Hill reaction, 221-222. 

 on rate of photosynthesis, 78, 221. 

 Cyanide sensitivity, absence in Hill 



reaction of, 387. 

 Cysteine, used in photoreduction of 



thionine, 50. 

 Cytochrome 



absorption spectra of, 175. 

 interaction with chlorophyll of, 29. 

 fight excitation of, 29, 161, 322. 

 Cytochrome-428, 167. 

 Cytochrome a, 150-151. 

 Cytochrome aj, 150. 

 Cytochrome b, 151-152, 177. 



absorption spectrum of, 175, 178, 

 184, 187-188, 197. 

 Cytochrome b*, absorption spectrum of, 



197. 

 Cytochrome be, 151, 156, 159. 



presence in chloroplast preparations 

 of, 267. 

 Cytochrome c, 150-155, 157, 158, 162, 

 177. 

 absorption spectrum of, 167, 175, 



178, 187-188, 197. 

 in nitrite reductions, 255. 

 oxidation of, 179-182. 



effect on optical density of, 181- 

 182. 

 reactions wth Rhodospirillum ru- 



brum, 179-182. 

 reduction of 



by chloroplasts, 263. 

 in the dark, 201. 

 Cvtochrome cj 

 absorption spectrum of, 184. 



