LUMINESCENCE OF PHOTOSYNTHETIC ORGANISMS 127 



of the fluorescence emission of chlorophyll. Since iron porphyrins are relatively 

 nonfluorescent you would not expect to pick up the fluorescent light or any 

 singlet excited state from this compound anyway. 



References 



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2. Arnold, \^'., unpublishetl data. 



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7. Arnold, W., and Segal, J., unpublished data. 



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18. Kok, B., this volume. 



