Fig. 2

(A) DPPH inhibition rate of EGCG@PDA NPs and PDA NPs under different determination times. (B) ABST+ scavenging ability of EGCG@PDA NPs and PDA NPs in vitro under different determination times. (C) DPPH scavenging ability of EGCG@PDA NPs and PDA NPs at different concentrations and under different storage days. (D) Total antioxidant capacity of EGCG@PDA NPs and PDA NPs at different concentrations and under different storage days. (E) The stability of EGCG@PDA NPs under water solutions and the degradability of EGCG@PDA NPs under semen or H2O2 systems