wells plate and shook for 3 min, thereafter
Na2CO3 (0.577 M, 80 μl) was added. The
absorbance was measured at 750 nm following 1
hr incubation under ambient temperature. All of
tests were done in triplicate and analyzed similar
to those of antioxidant activity. The measurement
was reported as mg of gallic acid equivalents per
100 g of fraction (mg GAE/100 g).