Table 1.

DPPH free radical scavenging activity of P. fraternus aqueous and ethanolic extracts of aerial part and root.

Aerial part			Root
Concentration (µg/mL)	Aqueous extract	Ethanol extract	Ethanol extract	Concentration (µg/mL)	Aqueous extract
	Percentage inhibition (mean ± SE)	Percentage inhibition (mean ± SE)	Percentage inhibition (mean ± SE)		Percentage inhibition (mean ± SE)
50	10.28 ± 0.72	8.47 ± 0.47	5.67 ± 0.68**	100	8.47 ± 0.28**
100	15.09 ± 0.51**	18.64 ± 0.99**	11.72 ± 1.36	500	15.29 ± 0.67**
200	31.23 ± 1.54**	45.99 ± 1.15**	32.85 ± 0.54**	1000	24.35 ± 1.11**
300	40.16 ± 1.33**	61.18 ± 1.32**	39.28 ± 1.68**	2000	35.46 ± 0.61**
400	54.04 ± 1.91**	73.96 ± 1.01**	57.77 ± 1.50**	3000	48.40 ± 0.52**
500	62.92 ± 1.89**	94.59 ± 1.10**	64.91 ± 1.33**	4000	63.86 ± 0.78**
				5000	77.98 ± 0.76**
EC50	360	258	337	EC50	3038

EC₅₀ of Ascorbic acid is 88.96.

**Significant at P < 0.001.