Fig. 3

E. coli (a, b) and S. aureus (c, d) cells were treated with different concentrations of CTAB (a, c) and ampicillin (b, d). Viability of the cells is the common parameter which has changed in a dose dependent manner for both of the agents, thus percentage change in Zeta potential (ZP; dashed red line) and percentage change in permeability (solid black line) was plotted against percentage of viable cells