Table 4.

MBC of copper oxide nanoparticles (annealed at different temperatures) against different laboratory bacterial strains

Microorganisms	MBC of copper nanoparticles (μg/mL)
	400°C	500°C	600°C	700°C
E. coli	30 ± 2	45 ± 5	60 ± 3	95 ± 4
P. aeruginosa	35 ± 2	50 ± 3	75 ± 5	85 ± 5
B. subtilis	45 ± 3	62 ± 4	85 ± 4	95 ± 5
S. aureus	32 ± 5	75 ± 2	90 ± 5	100 ± 4

Note: Each value in mean ± standard deviation.

Abbreviation: MBC, minimum bactericidal concentration.