1202 AUTHOR INDEX 



Noack, K.; Fluorescence of colloidal leaf extracts, 776-777; participation of flavones in 

 photosynthesis?, 1165. See also Sierp, H. 



Noddack, W., and Eichhoff, H. J.: Light scattering by Chlorella suspension, 676-677; 

 absorption spectrum of Chlorella, 690, 692, 699, 700; absorption ratio in red 

 and green in Chlorella, 708; enhanced absorption in far red in vivo, 715-716; 

 light scattering measured by "ellipsoid photometer," 843; constant photosyn- 

 thesis in Chlorella, 877; light curves of Chlorella in red, yellow and white light, 

 969,1160,1162; linear range, 980; compensation point, 983; quantum yield of 

 Chlorella in monochromatic light, 1155-1156. 



and Komor, J.: Yields of organic matter in grass plots, 1004-1006. 



and Kopp, C: Light curves of Chlorella at different temperatures, 969, 973; linear 



range, 980; assimilation numbers of Chlorella cultures, 991, 993. 



Ochoa, S.: Reductive carboxylation, 937, 939. 



Oltmanns, F.: No chromatic adaptation?, 995. 



Oneto, J. F. See Pratt, R. 



Oppenheimer, R. J. See Arnold, W. 



Osterhout, W. J. V., and Dorcas, M. J.: Penetration of carbonic acid into Valonia, 887. 



Osterlind, S. : Can algae use bicarbonate ions more effectively than CO2 molecules?, 890- 



891; CO2 compensation point lowered by bicarbonate, 895; inhibition by excess 



CO2 in algae, 903. 

 Overkott, O.: CO2 supply through roots, 910. 



Paauw, P. van der: CO2 curves of Hormidium, 893, 904; adaptation of Hormidium to 

 weak light, 989, 994. 



Paetzold, I. See Stocker, O. 



Pantanelli, E.: Photosynthesis as function of light intensity, 964. 



Pauling, L. : Theory of polyene spectra, 663. 



Pekerman, F. M. See Vavilov, S. L 



Petering, H. G., Duggar, B. M., and Daniels, F.: Polarography applied to measurement 

 of photosynthesis, 850-851; quantum yield of Chlorella determined by polaro- 

 graphic method, 1120-1121. 



Plaetzer, H. : Compensation points of aquatic plants, 982; of algae, 983. 



Pokrovski, G. L : Reflection, absorption and transmission of infrared light by leaves, 696, 



Pollack, M. See Franck, J. 



Pratt, J. See Pratt, R. 



Pratt, R.: Inhibition of photosynthesis by a metabolite of Chlorella, 833; effect of K and 

 Na bicarbonate on time course of photosynthesis in Chlorella, 835-836, 877. 



(with Fong, J., Oneto, J. F., and Pratt, J.): A growth-nihibiting substance ("chlo- 



rellin") formed in Chlorella suspensions, 880; its extraction and inhibiting effect on 

 photosynthesis, 880-881; decline of photosynthesis with age of Chlorella suspen- 

 sions, 881-882. 



Pringsheim, P. See Franck, J. 



Prins, J. A.: Life-time of excited chlorophyll, 633-634; yield of chlorophyll fluorescence 

 in solution, 752, 754. 



Pruckner, F.: Solvent effect on spectra of porphin, chlorophyll and bacteriochlorophyll, 

 642. See also Stern, A. 



Puck, T. T. See Franck, J. 



