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- W2904770736 abstract "Abstract Chitosan (CS) is a natural biopolymer with versatile applications. In this work, CS was functionalized with tannic acid (TA) by a free radical grafting procedure to improve its antioxidant capacity. The resulting TA-conjugated CS (TA-CS) showed a high TA equivalent content of 267.1 ± 5.4 mg TAE/g. The formation of TA-CS was verified by UV–vis, FTIR, and 1H NMR analyses. Moreover, TA-CS showed a lower thermal stability and crystallinity than CS and exhibited a good water-solubility of 15.0 ± 0.3 mg/mL. The DPPH radical scavenging activity of TA-CS reached a maximum of 91.6%, which was 6.4-fold higher than that of CS. Similar results were also observed in ABTS and hydroxyl radical scavenging assays. Moreover, TA-CS showed a higher superoxide radical scavenging activity and ferrous ion chelating activity than both TA and CS. These results suggest that conjugating with TA is an available way to enhance the antioxidant capacity of CS." @default.
- W2904770736 created "2018-12-22" @default.
- W2904770736 creator A5007745324 @default.
- W2904770736 creator A5010464708 @default.
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- W2904770736 date "2019-02-01" @default.
- W2904770736 modified "2023-10-01" @default.
- W2904770736 title "Free radical-mediated conjugation of chitosan with tannic acid: Characterization and antioxidant capacity" @default.
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- W2904770736 doi "https://doi.org/10.1016/j.reactfunctpolym.2018.12.005" @default.
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