Xll CONTENTS 



fluorescence Yield of Chlorophyll in ChloreUa as a Function of Light 



Intensity 



John E. Brugger 113 



Introductory Remarks on the Luminescence of Photosynthetic Organ- 

 isms 



Bernard L. Strehler 118 



Decay of the Delaj'ed Light Emission in ChloreUa 



William Arnold 128 



Some Observations on the Chemiluminescence of Algae 



John E. Brugger 134 



A Theory of the Photochemical Part of Photosynthesis 



James Franck 142 



PART III: The Possible Role of Cytochromes 



Hematin Compounds in the Metabolism of Photosynthetic Tissues 



Martin D. Kamen 149 



Investigations in the Photosynthetic Mechanism of Purple Bacteria by 



Means of Sensitive Absorption Spectrophotometrj'^ 



L. N. M. DuYSENS 164 



Oxidation of Cytochromes upon Near-Infrared Irradiation of Chroma- 



tiutn 



John M. Olson 174 



The Reactions of RhodospiriUimi rubriim Extract with Cytochrome c 



LuciLE Smith 179 



On the Time Sequence of Reactions in the Anaerobic Light Effect in 



Rhodospirilhmi rubrum 



Britton Chance 184 



The Effect of Hydrosulfite on the Anaerobic Light Effect 



Britton Chance and Lucile Smith 189 



The Fast Light Reaction of Extracts and of Inhibited Cell Suspensions 



Britton Chance, Margareta Baltscheffsky, and Lucile Smith 192 



PART IV: "Dark" Reactions 



1 . Fixation of Carbon Dioxide 



The "Background" CO2 Fixation Occurring in Green Cells and Its Pos- 

 sible Relation to the Mechanism of Photosynthesis 

 Shigetoh Miyachi, Toyoyasu Hirokawa, and Hiroshi Tamiya . 205 



Some New Preillumination Experiments with Carbon-14 



Hiroshi Tamiya, Shigetoh Miyachi, and Toyoyasu Hirokawa. 213 



Photosynthesis by the Etiolated Plant after Exposure to Light 



N. E. Tolbert 224 



Excretion of Glycolic Acid by ChloreUa during Photosynthesis 



N. 1']. Tolbert and L. P. Zill 228 



2. Photoreduction loith Various Reductants 

 Oxygen Evolution and Photoreduction by Adapted Scenedesmus 



Leonard Horwitz and F. L. Allen 232 



