in sequence.
The mixtures
were incubated at 25 ◦C for 5 min. After the reaction was
terminated with hydrochloric acid, the absorbance was measured
at 560 nm. Ascorbic acid (Vc) was used as positive control. The
superoxide anion radical scavenging activity was calculated using
the equation as follows: superoxide anion radical scavenging activity
(%) = (A0 − A1 + A2)/A0 × 100, where A0 was the absorbance of
control group (water instead of JQPs), A1 was the absorbance of
sample in reactive system. A2 was the final absorbance of sample