TABLE 4.

Color values of soybean curd subjected to POH for the maximum treatment times under different duty ratios and applied voltages^a

Duty ratio	Applied voltage (Vrms)	L*	a*	b*
Control	Control	78.77 ± 0.40 A	−1.56 ± 0.10 A	11.47 ± 0.39 A
0.05	48	79.19 ± 0.28 A	−1.58 ± 0.04 A	11.41 ± 0.51 A
0.1	48	78.87 ± 0.14 A	−1.48 ± 0.05 A	11.60 ± 0.33 A
	60	79.31 ± 0.53 A	−1.59 ± 0.07 A	11.48 ± 0.31 A
	70	79.16 ± 0.57 A	−1.56 ± 0.08 A	11.31 ± 0.12 A
	80	78.15 ± 1.39 A	−1.60 ± 0.05 A	11.64 ± 0.42 A

^aThe maximum treatment times were 490, 310, 200, and 160 s at 48, 60, 70, and 80 V_rms, respectively. The data are expressed as means ± standard deviations from three replications. Values followed by the same uppercase letter in the same column are not significantly different (P > 0.05).