For the determination of antioxidant activities of black queen
GWL, the lees was homogenized with distilled water (the weight
ratio was 1:3) at 3000g, 5 C for 3 min under vacuum (Stephan UMC
5, Stephan Food Service Equipment, Hameln, Germany). The paste
(containing 0.17 g GWL) served as the sample for the measurements
of total anthocyanin content, total phenolic content, DPPH
radical scavenging activity, reducing power and inhibitory ability
toward oxidative damage on human erythrocyte membrane.