Table 2
Polyphenol contents and Hunter 's color values of Yakju containing lotus leaves pretreated differently before and after cold storage

Pretreatmentmethods		Polyphenol (ppm)	Hunter's color value
Pretreatmentmethods		Polyphenol (ppm)	L	a	b
Before cold storage	Fresh	438.21±9.06^1)b2)	91.73±1.18	-0.14±0.24^ab	11.23±0.80^a
	Blanching	387.21±10.69^c	93.77±0.32	-1.16±0.03^c	8.25±0.19^c
	Roasting	462.63±13.00^a	92.34±0.51	-0.46±0.14^b	11.40±0.21^a
	Drying	429.02±4.58^b	92.83±0.91	-0.05±0.34^a	10.00±0.56^b
	F-value	30.670^***3)	3.513^NS4)	14.763^**	23.552^***
After cold storage	Fresh	394.18±14.95^a	93.99±0.99	-0.03±0.32	9.59±0.26^a
	Blanching	315.89±28.08^b	94.35±0.99	0.00±0.07	7.30±0.43^b
	Steaming	398.28±5.48^a	94.09±0.58	-0.18±0.19	9.43±0.57^a
	Roasting	428.57±13.73^a	94.59±1.07	-0.50±0.17	9.54±0.37^a
	F-value	22.528^***	0.255^NS	3.589^NS	21.018^***

mean±SD (n=3).
Means in a column by different superscripts are significantly different at p<0.05 significance level by Duncan's multiple range test.
*p<0.05, **p<0.01, ***p<0.001.
means no significance.