60 PHOTOCHEMICAL PRINCIPLES 



Table I. Comparison of ESR and Luminescence Observations on Chloroplasts 



Rise Time Decay Time 



" Excited by wavelengths between 350-450 rufj. or 600-700 m/x. 



ever, at 60 °C, the decay time of the dried material is of the order of 

 seconds. These figures are summarized again in Table I. 



Some of the luminescence decay curves for wet, whole spinach 

 chloroplasts are shown in Fig. 6. The apparatus (Tollin and Calvin, 



tn 



>- 

 q: 

 < 

 a: 



m 



< 



H 



•z. 



TIME (SECONDS) 



Fig. 6. Luminescence decay curves for wet, whole spinach chloroplasts 

 at four temperatures: log intensity vs. time. 



