Picosecond Fluorescence In Spinach Chloroplasts

Douglas Magde; Sylvia J. Berens; Warren L. Butler

doi:10.1117/12.933210

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23 April 1982 Picosecond Fluorescence In Spinach Chloroplasts

Douglas Magde, Sylvia J. Berens, Warren L. Butler

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Proceedings Volume 0322, Picosecond Lasers and Applications; (1982) https://doi.org/10.1117/12.933210
Event: 1982 Los Angeles Technical Symposium, 1982, Los Angeles, United States

Abstract

Fluorescence decay measurements using a mode-locked argon laser and single photon time-correlated detection, help us understand energy migration in photosynthesis. For intact spinach chloroplasts we find multiple exponential decays. There is some hint of a very fast component (<100 ps), but our data reveal little about it. We would expect this to be due to "photosystem I units." In addition we find two components at longer times, both of which lengthen as conditions are changed from "open" reaction centers (0.1 and 0.7 ns) to "closed" reac-tion centers (1 and 2 ns). This may reflect two kinds of organization for "photosystem II units."

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Douglas Magde, Sylvia J. Berens, and Warren L. Butler "Picosecond Fluorescence In Spinach Chloroplasts", Proc. SPIE 0322, Picosecond Lasers and Applications, (23 April 1982); https://doi.org/10.1117/12.933210

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