Fig. 4From: Alteration of Zeta potential and membrane permeability in bacteria: a study with cationic agentsBacterial cell suspension (CTAB 30 µg/ml and untreated Blank) stained with Syto-9 and PI analysed by CLSM. Cells with intact cell surface (membrane undisturbed) stained fluorescent green, whereas cells with ruptured surface (altered membrane integrity) stained fluorescent red. The overlap of the red and greens appear as orange Back to article page