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(A) Minimum bactericidal concentrations (g mL−1) of the Ag-Au alloy nanoparticles against (a) P. aeruoginosa and (b) S. aureus. Results are expressed as the mean SD of triplicate experiments, (B) SEM images of untreated and treated with Ag-Au alloy nanoparticles and the altered shape of P. aeruginosa and S. aureus. * p < 0.05, ** p < 0.01 compared with untreated group.
