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Antibacterial activity exhibited by TiO2 nanoparticles and N-doped TiO2 nanoparticles against Gram-positive bacterial strains; (A) Bacillus subtillis, (B) Staphylococcus aureus, (C) methicillin resistant Staphylococcus aureus (MRSA), (D) resistant Streptococcus haemoliticus. Error bars are shown as standard deviation on each bar. Bars are significantly different at confidence interval level of 95%.
