Table 4.
Change in electron donation ability (%)1) of grape seed tea extracted from grape seeds which were roasted at different conditions.

Roasting Temp. (°C)	Roasting time (min)
	10	20	30	40	50	60
	150	80.2±2.5ab2)	80.9±2.6a	81.4±2.8a	83.8±1.9a	85.2±2.8a	64.3±0.6d
160	79.6±2.4b	75.1±1.3b	85.2±2.9a	85.1±2.5a	81.6±2.6b	78.2±2.1b
170	85.7±3.3ab	78.4±1.4a	85.1±2.7a	84.5±2.4a	88.0±2.7a	85.4±2.5a
180	80.8±2.2b	78.8±1.6a	80.1±2.6a	79.7±1.9b	80.0±2.7b	77.2±2.0b
190	72.5±2.1c	63.5±0.9c	71.5±1.8b	79.0±2.1b	69.3±1.5c	68.6±0.7c

Electron donation ability of grape seed tea extracted from unroasted grape seed was 78.1±2.2 %.
Means in the same column bearing different superscripts are significantly different (p < 0.05).