Fig. 5.

Effects of FVG, PB₁ and catechin on ¹O₂ generated by illuminated rose bengal. A, ESR spin trapping measurement of ¹O₂ produced by the photochemical reaction of rose bengal illuminated for 2 min (18,000 lux) with 4-oxo-TEMP (40 mM) as the spin trap (a) in the absence of antioxidant; control with FVG (b; 100 µg/ml), catechin (c; 100 µg/ml), and PB₁ (d; 100 µg/ml) pre-treatment, respectively. B, the effects of FVG, catechin, and PB₁ on ¹O₂ generated by illuminated rose bengal. The signal intensity of the second peak of the spectrum was normalized as the relative height against the signal intensity of a control. Results are expressed as percent of control and are represented as mean ± SEM. * indicates a significant difference (p<0.05) versus the corresponding control value.