Fig. 7. Scanning electron microimage of the bacterial biofilm. Images A–D represent the biofilm formed on a solid surface; untreated K. pneumoniae biofilm (A), K. pneumoniae + 0.25 mg ml^–1 ZnONPs (B), K. pneumoniae + 0.5 mg ml^–1 ZnONPs (C), and K. pneumoniae + 1 mg ml^–1 ZnONPs (D). A magnified view at ×15 000 is shown (Panel A and D insets). Micrographs E–H show the biofilm of untreated S. aureus (E), S. aureus + 0.25 mg ml^–1 ZnONPs (F), S. aureus + 0.5 mg ml^–1 ZnONPs (G), and S. aureus + 1 mg ml^–1 ZnONPs (H). A magnified view at ×15 000 is shown in Panel E and H insets. Red arrows indicate the distortion of the normal bacterial cell.