1054 



THE LIGHT FACTOR. 



INTENSITY 



CHAP, 28 



JNCIDENT INTENSITY, erg/cm. sec. 



Fig. 28.31. Fluorescence of pur- 

 ple bacteria as function of the con- 

 centration of reductants (after 

 Wassink et al. 1942). 5% CO2, 

 pH6.3, 29°C. 



Fig. 28.32. Influence of con- 

 centration of thiosulfate on in- 

 tensity of fluorescence (Wassink 

 et al. 1942). 5% CO2, pH 6.3, 

 29° C. 



UJ 



o 



o 

 </) 



a: 

 o 



3 



14 

 12 



10 

 8 

 6 

 4 

 2 



without hydrogen 

 Q 2 % hydrogen 

 A 2.9% hydrogen 

 o 15% hydrogen 



INCIDENT INTENSITY, erg/cm' sec. 



Fig. 28.33. Influence of concentration of H2 on intensity of fluores- 

 cence (after Wassink ei al. 1942). 5% CO2, pH 7.6, 29° C. 



