CONTENTS 



PART I: Absorption, Fluorescence, Luminescence, and Photochem- 

 istry of Pigments in Vitro 



The Photochemistry of ChlorophvU in Vitro 



Robert Livingston 3 



The Electronic Spectra of Chlorophylls and Related Molecules 



Ralph S. Becker 13 



Fluorescence Spectra of Protochlorophyll, Chlorophylls c and d, and 



Their Pheophytins 



C. S. French, James H. C. Smith, and Hemming I. Virgin 17 



General Remarks on Chlorophyll-Sensitized Photochemical Reactions 



in Vitro 



James Fra nck 19 



Reversible Spectral Changes in Chlorophyll Solutions, Following Flash 



Illumination 



Henry Linschitz and Edwin W. Abrahamson 31 



Infrared Spectroscopy of Chlorophyll and Derivatives 



A. Stanley Holt 37 



Dark- and Light-Activated Chemiluminescence of Chlorophyll in 



Vitro 



A. Gene Ferrari, Bernard L. Strehler, and William E. 



Arthur 45 



Photoreduction of Synthetic Dyes 



Gerald Oster 50 



PART II: Absorption, Scattering, Fluorescence, Luminescence, and 

 Primary Photochemical Process in Vivo 



Methods for Measurement and Analysis of Changes in Light Absorp- 

 tion Occurring upon Illumination of Photosynthesizing Organisms 

 L. N. M. DuYSENS 59 



Reversible Bleaching of Chlorophyll in Vivo 



J. W. Coleman, A. Stanley Holt, and Eugene I. Rabinowitch 68 



Reaction Patterns in the Primary Process of Photosynthesis 



H. T. Witt 75 



Spectroscopy of Flash-Illuminated Chloroplasta 



J. L. Rosenberg, S. Takashima, and Rufus Lumry 85 



Absorption Spectrum Changes in Chlorella and the Primary Process 



Bernard L. Strehler and V. H. Lynch 89 



-^ Selective Scattering of Light by Pigment-Containing Plant Cells 



Paul Latimer and Eugene I. Rabinowitch 100 



The Absolute Quantum Yields of Fluorescence of Photosynthetically 

 Active Pigments 



Paul Latimer, Thomas T. Bannister, and Eugene I. Rabino- 

 witch 1*^' 



XI 



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