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Effects of the aqueous polysaccharide fractions of Cordyceps taii on free radical scavenging and metal ion chelation in vitro. (a) DPPH free radical scavenging, (b) hydroxyl free radical scavenging, (c) superoxide anion free radical scavenging, and (d) ferrous ion chelation. AECT: aqueous extract of C. taii; APCT: aqueous crude polysaccharide fraction of C. taii; TU: thiourea; EDTA: ethylenediamine tetraacetic acid.
