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Representative plate photographs of the colony forming units (CFUs) for the antibacterial tests performed with methicillin-resistant Staphylococcus aureus (MRSA) in isotonic saline solution (negative control), and in isotonic saline solution with 80 µg/mL of graphene oxide (GO), carbon nanofibers (CNFs) or zinc (positive control) after 1.5 and 3 h of culture at 37 °C in the dark and under continuous LED irradiation (Dilution factor of 10−2).
