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(A) Bleaching recovery kinetic curves of carotenoid-containing LH2 (Rb. sphaeroides 2.4.1) and the corresponding LH2/TiO2 (0.1 g/L) colloidal solution excited at 400 nm, 0.3 μJ/pulse, and probed at 852 nm; graphic inset shows early time kinetics; (B) time-resolved absorbance difference absorption spectra of the corresponding LH2 and LH2/TiO2 colloidal solution; graphic inset shows the expanded view of the spectra.
