Fig. 2From: Alteration of Zeta potential and membrane permeability in bacteria: a study with cationic agentsChange in bacterial (a, b E. coli; c, d S. aureus) membrane permeability (assayed by crystal violet uptake) in presence of different concentrations of CTAB (a, c) and polymyxin B (b, d). Percentage of crystal violet uptake was plotted against the concentration (µg/ml) of the treatmentBack to article page