Table 2.

Photographs of E. coli bacterial culture plates formed after E. coli plates were exposed to ZnO NPs at different times.

Content of ZnO NPs	E. coli initial concentration: 5·105 CFU/mL			E. coli initial concentration: 5·104 CFU/mL
	1 h	3 h	6 h	1 h	3 h	6 h
10 mg/mL ZnO
5 mg/mL ZnO
1 mg/mL ZnO