Fig. 7
From: Anti‐bacterial and wound healing‐promoting effects of zinc ferrite nanoparticles
Membrane permeability assay. Fluorescence images of E. coli and S. aureus showing the influx of FITC after treatment with zinc ferrite (ZnFe2O4) NPs and tetracycline (positive control). a Untreated E. coli (negative control). b Untreated S. aureus (negative control). c E. coli treated with tetracycline (positive control). d S. aureus treated with tetracycline (positive control). e E. coli treated with 100 µg/mL of ZnFe2O4 NPs. f S. aureus treated with 100 µg/mL of ZnFe2O4 NPs. Tetracycline and ZnFe2O4 NPs induced membrane damage to both Gram-positive and Gram-negative bacteria, resulted in the membrane permeability to the green fluorescent FITC dye. Scale bars show 100 µm