Table 1
Extraction yields and useful ingredients contents of water extracts from C. retusus flesh by different extraction conditions

Contents	Extract1)
	25W	80W	110W
	Extraction yield (%)	21.78	51.17	67.94
Polyphenol compounds (mg/g)	8.71±0.162)^c3)	72.71±0.67^a	66.88±1.34^b
Flavonoid compounds (mg/g)	3.64±0.02^c	5.58±0.04^b	7.60±0.01^a
Soluble protein (mg/g)	2.10±0.01^c	4.76±0.02^b	4.93±0.02^a
Reducing sugar (mg/g)	32.47±1.60^c	40.66±2.14^b	46.77±0.20^a

25W, water extract at room temperature; 80W, water extract by reflux extraction at 80°C; 110W, water extract by pressure heating extraction at 110°C.
Values are mean±SD of triplicate determinations.
Values with different superscript alphabet in the same raw were significantly different among group at p<0.05 level by Duncan’s multiple range test.