Fig. 4
From: The bactericidal effect of an ionizer under low concentration of ozone
Generation of ROS examined with a fluorescence microscope. S. aureus suspensions were spread on glass slides after incubation with DCFH-DA for 1 h, and exposed to the F-mode, IZ + F-mode and IZ + F + C-mode for 120mins; they were then examined with a fluorescence microscope (1,000X, confocal microscope, Olympus FV1200)