Table 5.
Xanthine oxidase inhibitory activity of hot water extracts from root and aerial part of S. palmata

Concentration (μg/mL)	Extract		Control
	RHW	APHW	Ascorbic acid
	50	17.36 ± 1.20^bc1)	19.64 ± 1.79^b	70.90 ± 2.43^a
100	35.42 ± 0.00^c	48.21 ± 1.79^b	88.89 ± 2.75^a
300	72.22 ± 1.20^c	78.57 ± 1.79^b	90.48 ± 0.00^a
500	84.72 ± 1.20^bc	86.90 ± 2.06^b	94.71 ± 0.92^a
1,000	97.92 ± 2.08^a	95.83 ± 1.03^a	96.30 ± 0.92^a
IC₅₀	139.62 ± 3.82^b	111.11 ± 5.56^b	52.17 ± 0.21^a

Values represent the mean±SD and mean with different superscripts within the row are significantly different at p<0.05 by Duncan’s multiple range test. IC₅₀ values were determined by linear regression analysis.