Fig. 3From: Evaluation of the interaction between polymyxin B and Pseudomonas aeruginosa biofilm and planktonic cells: reactive oxygen species induction and zeta potentialDetermination of the interaction between polymyxin B and Pseudomonas aeruginosa P1C planktonic cells (a), P1C biofilm cells (b), P9C planktonic cells (c), and P9C biofilm cells (d) using the zeta potential (ZP/mV). Significant differences between the treated and untreated cells are represented by one asterisk (P < 0.05). Significant differences between no treatment planktonic and biofilm cells are represented by two asterisks (P < 0.05). Data are presented as the mean ± S.E. of two independent experimentsBack to article page