GENERAL REVIEW 



975 



a: 



iLl 

 > 



600 



400 



< 



^ 200 



O no inhibitor 

 • 2.5 X 10"" mole/hter 

 NHjOH-HCl 



20 40 60 80 



RELATIVE LIGHT INTENSITY 



100 



Fig. 28.9B. Light curves of inhibited 

 Chlorella cells showing that NH20H-HC1 is 

 effective at all light intensities (after Weller 

 and Franck 19-11). 



200 



E 

 E 



100 



O no inhibitor 

 • 05 ml. 50% 

 urethan/ml. 



150 X 10' 



INTENSITY 



Fig. 28.9C. Light curves of in- 

 hibited Chlorella cells showing that 

 ethylurethan is effective at all light 

 intensities (after Wassink, Vermeulen, 

 Reman and Katz 1938). Intensity is 

 in erg/cm.^ sec. 



2.00 F 

 n 



S lOOi- 



0.50 - 



o 



O 0.25 - 



X 

 Q. 



0.13 



350 700 1600 4000 22000 350 700 1600 4000 22000 



LIGHT INTENSITY, lux 



Fig. 28. 9D. Light curves of inhibited Chlorella cells sliowing that CuSO^ is 

 effective, NiSO^ ineffective at low light intensities (after Greenfield 1942). 



