Visible Light-Induced Antibacterial Activity of Pigments Extracted from Dregs of Green and Black Teas

Figure 8

Absorption spectra of pigments recovered from the dregs of green tea (GT) in acetone solvent during irradiation treatment 0–60 min using blue (a) and red (b) LEDs. The observed reductions in absorption at 475 nm were plotted and compared to the equivalent treatment for standard carotene (c).

(a)

(b)

(c)