QUANTUM YIELD MEASUREMENTS BY THE MANOMETRIC METHOD 1099 







2 



4 



6 



8 



10 



12 



14 



16 



18 



6 12 18 24 30 36 42 48 



IB 24 30 36 42 48 



6 12 18 24 30 36 42 48 

 TIME, min. 



TIME, mm. 



Fig. 29.4. Quantum yield measurements with Chlorella (after Warburg 1948). 

 Yellow light, 10°C. Shaded areas represent "induction losses" attributed to 

 sluggishness of manometer. (Curve .4 shows a sliglit excess instead of deficiency of 

 gas evolution at the beginning of illumination.) Quantum yield is determined 

 from difference between slope in light (.45 or CD, depending on (he method of 

 calculation) and slope in darkness. 



