Fig. 5
In vitro antibacterial activity of the hydrogels. A Images of bacteria colonies of E. coli and S. aureus on agar plates after contacting with the hydrogels for 12 h. B Surface bacterial viability of hydrogels for E. coli and S. aureus by colony counting. (n = 3, mean ± S.D., **P < 0.01, ***P < 0.001 and ****P < 0.0001)