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Microbial biofilm development of E. coli (left) and S. aureus (right) after different incubation periods with PLA/Fe3O4@EG coatings, expressed as CFU/mL values reflecting number of viable cells imbedded in biofilms. * p < 0.05; ** p < 0.01; *** p < 0.001 (CFU/mL values of control vs. PLA/Fe3O4@EG coatings).
