Abstract
From fluorescence action spectra, fluorescence spectra and absorption spectra measured at room temperature and at 77 °K of light petroleum (b.p. 40–60°)-treated and normal chloroplasts, it is concluded that:
1. 1. In blue-green and red algae energy transfer from β-carotene to chlorophyll occurs in Photosystem I exclusively.
2. 2. In green
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