Effect of Zinc Oxide Nanoparticles in Drinking Water on Growth Rate, Biochemical Parameters, and Intestinal Histology of Broilers

Table 6

Effect of zinc oxide nanoparticles (ZnO NPs) on liver enzyme activity at 42 days of age.

Items	Groups					p value
	Control NDW	NDW with 60 ppm/L	NDW with 80 ppm/L	NDW with 100 ppm/L	NDW with 120 ppm/L
		ZnO NP	ZnO NP	ZnO NP	ZnO NP
ALT (UI)	48.34^a	41.32^b	34.89^c	40.03^bc	43.48^ab	0.002
AST (UI)	168.73^a	162.02^ab	153.11^bc	162.39^ab	140.58^c	0.004

^a,b,cMeans in the same column differ significantly (). NDW: normal drinking water.