Fig. 11

Study of antibacterial activity against Staphylococcus aureus by scanning electron microscopy (SEM). a Control. b Cells treated with 200 μg mL⁻¹ nalidixic acid. c Cells treated with 200 μg mL⁻¹ antibiotic Tetracycline. d Cells treated with 800 μg mL⁻¹ of NF7. e Cells treated with 400 μg mL⁻¹ of NF7. f Cells treated with 200 μg mL⁻¹ of NF7 (high magnification images are shown at the bottom left corner taken at 200 nm scale bar and 50.00 kV). Unless otherwise indicated, the images are at 1 μm scale bar and 25.00 kV