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Anti-biofilm activity of ZNs: (A) images of P. aeruginosa biofilm (a–c) CV staining under a light microscope, (B) acridine orange staining under a confocal laser scanning microscope. (a) Control, untreated, (b) 200 μg/mL of ZN1, and (c) 200 μg/mL of ZN2. (C) Effect of sub-MICs of ZN1 and ZN2 on percent inhibition of biofilm formation of P. aeruginosa PAO1.
