Figure 3

Coefficient of antibacterial synergy (K(AbS)) between different Ag and Cu components in RPMI cell culture media with Escherichia coli K-12 strain. *P < 0.05; **P < 0.01; ***P < 0.001, ##P < 0.01 antagonism. Note K(AbS) has been calculated as mean K(AbS) from different experiments, not from mean MBC of components in the mix or alone. The mean values with standard deviation are shown. cAg, Coated silver nanoparticles; nAg, Nanosilver; Ag₂O, Silver oxide; AgNO₃, Silver nitrate; CuO, Copper oxide; CuO–NH₂, Copper oxide coated with amino groups; CuO–COOH, Copper oxide coated with carboxy groups; CuSO₄, Copper sulphate.