Table 5.

Effect of diet and postmortem storage on antioxidants and TBARS values of semimembranosus muscle in goats

		Level of CPOBa, %				P value
Parameter	Time	0	4	8	SE	Diet	Diet x time
	0 d	2.43bx	3.66ax	4.39ax	0.54	0.026	0.476
α-tocopherol, mg/kg	1 d	2.40bx	3.33ay	4.20ax	0.34	0.034
	4 d	2.36bx	3.05aby	3.91ax	0.34	0.024
	7 d	2.00by	2.76ay	3.10ay	0.32	0.395
	P value	0.012	0.022	0.031
	0	0.70bx	0.80ax	0.83ax	0.08	0.048	0.614
γ-tocopherol, mg/kg	1	0.67by	0.79ax	0.80ax	0.05	0.045
	4	0.65ay	0.73ay	0.73ay	0.03	0.001
	7	0.65ay	0.68ay	0.70ay	0.07	0.272
	P value	0.010	0.042	0.044
	0	0.09x	0.08x	0.11x	0.01	0.530	0.513
δ-tocopherol, mg/kg	1	0.07x	0.08x	0.09xy	0.03	0.058
	4	0.05y	0.05y	0.07y	0.16	0.411
	7	0.04y	0.05y	0.07y	0.01	0.164
	P value	0.001	0.003	0.003
	0	0.14x	0.27x	0.38x	0.04	0.053	0.231
	1	0.11y	0.19y	0.22y	0.05	0.051
Total carotenoids, mg/kg	4	0.11y	0.15y	0.14y	0.03	0.053
	7	0.11y	0.14y	0.14y	0.08	0.176
	P value	0.043	0.022	0.019
	0	81.41	64.77	60.33	13.71	0.052	0.134
	1	86.55	67.44	62.97	12.44	0.055
GPX activityb	4	86.76	57.05	50.21	13.08	0.192
	7	87.36	76.76	66.56	7.25	0.149
	P value	0.187	0.901	0.782
	0	0.12x	0.10x	0.08x	0.11	0.466	0.612
TBARS, mg MDA/kg	1	0.25x	0.26x	0.24y	0.15	0.264
	4	0.42xy	0.40x	0.34y	0.25	0.393
	7	0.85ay	0.64by	0.56by	0.21	0.047
	P value	0.030	0.011	0.023

^{a, b, c,} means having different superscript along the same row are significantly different (P < 0.05). x, y, z means having different superscript along the same column are significantly different (P < 0.05). ^bGlutathione peroxidase activity is expressed as nmoles NADPH oxidized /min/mg protein. ^a80 % canola oil and 20 % palm oil blend