Table 7. Total flavonoid content of 80% ethanol extracts of sulgidduk with different ratio of galangal powder

	Sulgidduk added with galangal powder					F-value
	Control1)	2%	4%	6%	8%
Total flavonoid content (mg quercetin equivalents/g)	15.65±0.312)d	14.39±0.91d3)	26.64±2.06c	44.00±4.51b	53.83±4.94a	91.68***4)

Not added with galangal powder.
All values are means±SD (n=3).
Means with the different superscript letters in the same row are significantly different at p<0.05 by the Duncan’s multiple range test.
^***Significant at p<0.0001.