UJ 



^ 10 



ol 



>■ 

 X 

 0. 



o 



6 



X 



o 



r 8 - 



6 

 4 

 2 

 



10 



20 30 



40 



50 



FLUORESCENCE INTENSITY, RELATIVE UNITS 



Figure 13-- Relationship between chlorophyll a concentration 

 and fluorescence intensity for algae tested during day 

 and night conditions. (Adapted from ref. 27.) 



o 



0.2 



0.4 



1.0 



1.2 



1.4 



1.6 



0. 6 0. 8 

 TIME, sec 



Figure 14.- Transient fluorescence curve for Chlorella 

 when it is excited by 2-sec pulse of low-intensity 

 light. (Adapted from ref. 25.) 



38 



