45G D. D. HENDLEY 



Wassink: I was just wondering exactly what you meant by these quantum 

 efficiencies. Have 3'ou any indication that the mechanism is the same? Is any 

 hydrogen taken out during these initial effects? 



Hendley : No, I have no measurements of hj-drogen changes. 



Wassink: You, of course, are not sure that the comparison rates of CO2 and 

 hydrogen are the same during the initial effect? 



Hendley : Xo, they may be different. 



Wassink : That was observed in the case of initial effects that Emerson studied, 

 and so on, in Chlorella. 



Hendley: Yes. 



References 



1. Rosenberg, J. L., J. Gen. Physiol., 37, 753 (1954). 



2. Gaffron, H., Symp. Soc. Gen. Microbiol., 4, 152 (1954). 



3. Blinks, L. R., and Skow, R. K., Proc. Natl. Acad. Sci. U.S., 24, 413 (1938). 



4. Emerson, R., and Lewis, C. M., .4m. J. Botany, 28, 789 (1941). 



5. Franck, J., Am. J. Botany, 29, 314 (1942). 



6. Calvin, M., and Massini, P., Experientia, 8, 445 (1952). 



7. van der Veen, R., Physiol. Plantarum, 2, 217 (1949). 



8. Tolbert, N. E., this volume, p. 224. 



9. Strehler, B. L., and Totter, J. R., Arch. Biochem. and Biophys., 40, 28 (1952). 



