Figure 4From: Binding of Sudan II and IV to lecithin liposomes and E. coli membranes: insights into the toxicity of hydrophobic azo dyesEffects of pH (A), electrolyte (B) and temperature (C) on the interactions of Sudan red compounds with lecithin liposomes (0.20 mg/l). 1: 8 μM Sudan II and 2: 1 μM Sudan IV.Back to article page