454 



J. A. BASSHAM, M. KIRK 

 TABLE IV 



HATES OF GAS EXCHANGE IN STEADY STATE EXPT. 1 8 



All rates are given in /tmoles/ml of wet packed algae. 



Carbon dtoxide 



Initial rate 17-9 



During experiment 16.6 15.1 



Final rate 141 i3-7 



* See section Methods of measurements of rate of gas exchange for explanation of expression of 

 "C in //moles. In theory the value for "C and CO^ should be the same. The difference is a reflection 

 of inaccuracy in measurement of the slopes, especially CO^. 



Fig. 3. Appearance of '^C in stable compounds 



(dried on planchets) in Chlorella pyrenoidosa vs. time 



of photosynthesis with "COj. 



JO 40 50 60 m 

 Time in Seconds with"C02 



Fig. 4. Radioautograph of chromatogram of Chlorella 

 pyrenoidosa after 2 min photosynthesis with "COj. 



^^< 



\, titim tnjt, *»■ 



Fig- 4- 



110 



