54 



Bessel Kok 



itself. 



In blue-green algae, however, even 680 mu light is used 

 ineffectively. Vi/e therefore, assumed that in these algae 

 C700 is replaced (or amplified) by a significant fraction of 

 the total chlorophyll [indicated (Chi. a 1)] . 



ACKNOWLEDGEMENTS 



The author gratefully acknov/ledges the collaboration of 

 Miss Louisa Yang, Mrs. Pat VVoolf, Mr. Robert Trimble, and Mr. 

 Hans Rurainski. 



The work reported v/as supported in part by the National 

 Institutes of Health, the ^ir Force Office of Scientific 

 Research, the Air Force School of Aerospace Medicine and the 

 National Aeronautics and Space Administration. 



