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- W2073166840 abstract "Abstract Algae have the ability to protect themselves against excess of light energy by dissipating the excessive excitation energy. UV-B stress can damage the protecting mechanism. Applied UV-B irradiation causes ≈ 50% decrease of photosynthetic activity. It produces an increase of low-temperature fluorescence of the antennae and a decrease of the relative fluorescence of the RC due to a decrease of excited energy-transfer (EET) efficiency which reflects interruption of the EET between CP 43, CP 47 and the RC of PS II. Further information was obtained from persistent spectral hole-burning (PSHB) experiments. From the widths of the zero-phonon holes, EET rate constants were determined. The value of the Huang-Rhys factor value ( S ), which characterizes the electron-phonon coupling was approximately 1.5 times higher in UV-B stressed algae ( S ≈ 1.2). Broad-band holes with hole widths ≈ 170 cm −1 were observed in the fluorescence spectra of all samples, these holes were not significantly affected by UV-B." @default.
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- W2073166840 date "1997-06-01" @default.
- W2073166840 modified "2023-10-02" @default.
- W2073166840 title "Low-temperature spectroscopy of algae affected by UV-B stress absorption fluorescence and hole-burning" @default.
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- W2073166840 doi "https://doi.org/10.1016/s0022-2313(96)00219-0" @default.
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