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The antibacterial properties of the four hydrogels. (a) The Ag–AV–SF hydrogel showed the largest diameter of the antibacterial rings for both E. coli and S. aureus; (b) the Ag–AV–SF hydrogel showed significant difference with other single modifiers based hydrogel for both anti-E. coli and anti-S. aureus performance (*P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001)
