Table 2.

Characterization of sizes of NPs of Ag, CuO and ZnO used to derive the median MIC values in bacterial studies or L(E)C50 values in mammalian cell in vitro studies

	Mammalian cells in vitro			Bacteria
	Ag	CuO	ZnO	Ag	CuO	ZnO
Nr of data	28	22	25	46	13	15
Maximum size, nm	69	55	1000	89	30	125
Median size, nm	20	50	55	20	9.2	20
Minimum size, nm	5	12	20	3.3	6	3
Average size, nm	29.3	44	145.2	20	15.4	31.7