. 2020 Mar 4;6(3):e03528. doi: 10.1016/j.heliyon.2020.e03528

Table 1.

Antimicrobial effect of Cu NPs by agar well diffusion method by diameter of the inhibition zone (mm).

	Concentration (mg/mL)	Staphylococcus aureus	Escherichia coli	Listeria monocytogenes
CuNP-WS1	5	6.3 ± 1.1^aA∗	6.41 ± 2.27^aA	9.8 ± 2.0^aAB
CuNP-WS2	5	8.2 ± 2.5^aA	9.29 ± 0.5^bA	12.4 ± 0.9^aB
CuNP-WS3	5	11.6 ± 1.4^bA	10.2 ± 1.2^bA	15.0 ± 1.1^bB
∗∗Control	-	0^cA	0^cA	0^cA

∗Values are given as mean ± SD. Same row and the same column with different letters indicates significantly different (P < 0.05).

∗∗Control: Walnut shell powder.