TABLE 3.

Disk diffusion analysis of PP nanocomposites containing 4A Z/ZnO NPs/GTE against bacteria

	Diameter of inhibition zone (mm)
Bacteria	Control sample	Treatment 1	Treatment 2
E. coli O157:H7	–	12.73 ± 0.03 a	13.42 ± 0.01 e
S. aureus	–	10.98 ± 0.03 b	11.09 ± 0.04 f
P. fluorescens	–	12.11 ± 0.04 c	13.09 ± 0.02 g
L. Monocytogenes	–	11.36 ± 0.01 d	11.86 ± 0.03 hr

Control sample: Polypropylene (PP), Treatment 1: PP/3% ZnO NPs/4A Z/GTE and Treatment 2: PP/6% ZnO NPs/4A Z/GTE. 4A Z: 4A zeolite and GTE: green tea extract.

Data are presented as mean ± SD and analyzed with one‐way analysis of variance. Different letters in each day represent statistical significance among different treatments using the Tukey test.