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Difference Hb spectra. Representative absorption difference spectra (Δ absorbance) obtained from the data of spectra recorded every time subtracting the spectrum recorded at T0. The ocra yellow line: T1, light grey: T2, dark grey: T3, dark blue: T4, and black: Tend. p < 0.01 (# symbol), p < 0.001 (§ symbol), and p < 0.0001 (¶ symbol).
