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. 2021 Jun 24;76:105652. doi: 10.1016/j.ultsonch.2021.105652

Fig. 4.

Fig. 4

Scavenging activities on DPPH radicals (A), and metal ion chelating activities (C) of MPs after different treatments (T1-T7). Fig. 5B and 5D correspond to the scavenging capacity of DPPH radicals and metal ion for different samples at the concentration of 5 mg/mL. Different letters (a-f) indicated significant differences within different treatments (T1-T7).