Study on Biodegradable Chitosan-Whey Protein-Based Film Containing Bionanocomposite TiO₂ and Zataria multiflora Essential Oil

Table 2

The antimicrobial activity of WPI/chitosan samples incorporated with TiO₂ and TiO₂-ZEO.

Films	Diameter of inhibition zone (mm)
	L. monocytogenes (Gram +)	S. aureus (Gram +)	E. coli (Gram −)
Control	0.00 ± 0.00^c	0.00 ± 0.00^c	0.00 ± 0.00^c
TiO2-1%	0.00 ± 0.00^c	0.00 ± 0.00^c	0.00 ± 0.00^c
TiO2-1% + ZEO	7.90 ± 1.20^b	14.0 ± 2.00^b	8.2 ± 1.30^b
TiO2-2%	0.00 ± 0.00^c	0.00 ± 0.00^c	0.00 ± 0.00^c
TiO2-2% + ZEO	8.50 ± 1.00^a	23.20 ± 3.20^a	9.50 ± 1.50^a

Data are shown as average ± standard deviation. Different letters in the same column show significant differences ().