Table 5. pH and color of sausages added with natural extract during storage periods

Traits	Storage period (wk)	Control	T1	T2	T3	T4	T5	T6
pH	0	6.05±0.01^Cb	6.08±0.02^Aa	5.99±0.01^Ac	5.98±0.02^ABc	5.97±0.01^Bc	5.97±0.04^Bc	5.99±0.01^Ac
	1	6.16±0.01^Aa	5.91±0.02^Ce	5.98±0.04^Ab	5.93±0.01^Bde	5.91±0.01^Ce	5.97±0.01^Bbc	5.95±0.02^Bcd
	2	5.96±0.01^Db	6.01±0.01^Ba	5.90±0.02^Bc	5.98±0.03^ABab	5.96±0.04^Bb	5.95±0.02^Bb	5.91±0.03^BCc
	3	6.04±0.02^Cab	6.07±0.01^Aa	6.00±0.01^Ac	6.04±0.01^Ab	6.05±0.02^Aab	6.06±0.01^Aab	5.88±0.02^Cd
	4	6.11±0.02^Ba	6.00±0.05^Bb	6.01±0.02^Ab	5.96±0.08^Bb	5.85±0.01^Dc	5.96±0.01^Bb	5.81±0.05^Dc
CIE L*	0	74.19±0.54^Bb	75.28±0.94^Ca	73.69±0.99^Db	69.03±0.61^Cc	69.35±0.66^Cc	64.61±1.26^De	65.78±0.50^Cd
	1	76.13±0.85^Ac	85.85±1.37^Aa	85.47±0.92^ABc	79.89±0.45^ABc	80.52±0.52^Ab	75.80±1.04^ABc	76.03±0.59^Ab
	2	75.47±0.94^Ab	76.40±0.44^Ba	76.25±0.54^Ba	71.06±0.52^Bc	70.49±0.70^Bc	66.92±0.80^Bd	67.54±0.85^Bd
	3	75.64±0.52^Aab	76.68±0.41^Ba	75.11±0.56^Cb	68.95±2.55^Cd	70.40±0.49^Bc	65.91±0.49^Ce	66.04±1.00^Ce
	4	71.80±0.68^Ca	71.52±0.72^Da	69.81±0.99^Ec	64.05±0.94^Dd	64.17±0.75^Dd	58.73±0.85^Ef	60.35±0.39^De
CIE a*	0	4.08±0.20^Ac	3.68±0.13^Ad	3.37±0.17^Ae	4.79±0.10^Bb	4.01±0.15^Bc	4.97±0.10^Ba	4.73±0.09^Bb
	1	3.62±0.47^Bc	3.05±0.35^Bd	3.53±0.12^Ac	5.04±0.25^Aa	4.48±0.16^Ab	5.13±0.21^Aa	5.17±0.09^Aa
	2	2.99±0.44^Cc	2.58±0.18^Cd	3.32±0.09^Ab	4.69±0.19^Ba	4.61±0.17^Aa	4.49±0.11^Ca	4.66±0.18^Ba
	3	2.31±0.35^Dc	1.95±0.09^Dd	3.17±0.21^Ab	4.62±0.13^Ba	4.50±0.19^Aa	4.51±0.10^Ca	4.69±0.12^Ba
	4	1.64±0.09^Ed	1.77±0.25^Dd	2.68±0.70^Bc	4.25±0.10^Ca	3.81±0.16^Cb	3.81±0.19^Dd	4.16±0.08^Ca
CIE b*	0	10.32±0.28^Be	10.62±0.22^Bd	10.20±0.10^Be	11.02±0.19^Bc	11.24±0.25^ABc	12.24±0.39^Bb	12.58±0.23^Ba
	1	10.71±0.18^Ad	10.67±0.25^ABd	10.42±0.20^ABd	11.16±0.26^ABc	11.6±0.25^Ab	12.85±0.35^Aa	12.99±0.40^Aa
	2	10.85±0.43^Ae	10.88±0.11^Ade	10.55±0.15^Af	11.14±0.21^ABcd	11.37±0.29^ABc	12.47±0.15^Bb	13.06±0.40^Aa
	3	10.70±0.26^Ad	10.83±0.19^ABcd	10.64±0.23^Ad	11.45±0.40^Ab	11.15±0.55^Bbc	12.83±0.41^Aa	13.05±0.37^Aa
	4	9.58±0.20^Cbc	9.49±0.22^Cbc	9.35±0.57^Cbc	9.24±0.41^Cc	9.73±0.38^Cb	10.27±0.29^Ca	10.25±0.30^Ca

Values are presented as mean±SD with three replicates.
Control, no additives; T1, 0.2% sorbic acid; T2, 0.2% grapefruit seed; T3, 0.2% natural extract; T4, 0.2% natural extract and ascorbic acid; T5, 0.5% natural extract; T6, 0.5% natural extract and ascorbic acid.
Means within a column with different letters are significantly different (p<0.05).
Means within a row with different letters are significantly different (p<0.05).