. Bacterial photosynthesis. Bacteria -- Physiology; Photosynthesis. 12 OPENING ADDRESS 80 70 60 Q \ii o 50 o (C '^ 40 CO I 30 20 10 I 750 LUX CONTROL. ©. .ALKALINE- \^i/ PYR06ALL0L PALLADIUM •- 40 80 120 160 TIME (MINUTES) 200 240 Fig. 2. Photolysis of water in Scenedesmus as a simple manometric experiment. Hydrogen and oxygen are produced in about the ratio 2:1 if photosynthesis, photoreduction and phosphorylation are suppressed. Adapted algae are illumi- nated in absence of CO2, under nitrogen and in presence of an inhibitor of phosphorylation. The mixed character of the gas evolved becomes
. Bacterial photosynthesis. Bacteria -- Physiology; Photosynthesis. 12 OPENING ADDRESS 80 70 60 Q \ii o 50 o (C '^ 40 CO I 30 20 10 I 750 LUX CONTROL. ©. .ALKALINE- \^i/ PYR06ALL0L PALLADIUM •- 40 80 120 160 TIME (MINUTES) 200 240 Fig. 2. Photolysis of water in Scenedesmus as a simple manometric experiment. Hydrogen and oxygen are produced in about the ratio 2:1 if photosynthesis, photoreduction and phosphorylation are suppressed. Adapted algae are illumi- nated in absence of CO2, under nitrogen and in presence of an inhibitor of phosphorylation. The mixed character of the gas evolved becomes apparent by the way it reacts after the light has been turned off. Unless a water molecule is shown to be firmly bound as part of a molecule in such a way that it is not exchangeable, metabolic reactions in aqueous media will not distinguish one water molecule from another. When we speak of the photolysis of water, we do not mean that the emerging hydrogen and oxygen molecules stem from one and the same molecule as earlier hypotheses assumed. Nobody ever suggested this for electrolysis, for instance. Movements of electrons and holes, or charge transfer, are part of the mechanisms of reversible oxido re- ductions which in turn are the wheels of the apparatus which brings. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Symposium on Bacterial Photosynthesis (1963 : Yellow Springs, Ohio); Charles F. Kettering Research Laboratory (Yellow Springs, Ohio); Gest, Howard. Yellow Springs, Ohio, Antioch Press
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