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. 2018 Jul 4;23(7):1631. doi: 10.3390/molecules23071631

Figure 2.

Figure 2

(A) Color changes of 290 μg/mL (catechin hydrate in 0.1 M phosphate buffer solution) CHPB treated (a) without and with (b) 1.8, (c) 4.4, and (d) 8.8 μg/mL of ascorbic acid, respectively, under blue light irradiation at 2.0 mW/cm2 for 120 min, and (e) in the dark. (B) The absorption spectra of 290 μg/mL CHPB treated (a) without and with (b) 1.8, (c) 4.4, and (d) 8.8 μg/mL of ascorbic acid, respectively, under blue light irradiation at 2.0 mW/cm2 for 120 min, and (e) in the dark. The absorption spectra of 17.6 μg/mL ascorbic acid solutions treated (f) without and (g) with blue light irradiation at 2.0 mW/cm2 for 120 min. The reaction solutions were measured in the spectral range of 250–750 nm. (C) The effects of ascorbic acid on absorbance at 436 nm. The reduction percentage at 436 nm of 290 μg/mL CHPB treated (a) without and with (b) 1.8, (c) 4.4, and (d) 8.8 μg/mL of ascorbic acid, respectively, under blue light irradiation at 2.0 mW/cm2 for 120 min. Data are represented by mean ± standard deviation (SD), where n = 3. Statistical differences (p < 0.05) between groups are indicated by different letters below each bar.