TABLE 1.

Percentage of DPPH, NO, and H₂O₂ radical acts of scavenging of J. regia extract at various concentrations.

S. No.	Antioxidant assay method	Test sample and standard	Test concentration				IC50 value (μg/mL)
			0.1 μg/mL	1 μg/mL	10 μg/mL	100 μg/mL
1.	DPPH free radical scavenging	J. regia extract	58.20 ± 2.59	67.86 ± 0.73	88.97 ± 4.72	94.71 ± 0.33	2.31
		Standard (ascorbic acid)	56.83 ± 2.86	63.15 ± 5.4	95.16 ± 1.97	97.83 ± 0.06	2.44
2.	NO free radical scavenging	J. regia extract	26.98 ± 7.13	29.78 ± 6.97	37.28 ± 3.59	48.85 ± 1.45	35.66
		Standard (curcumin)	27.09 ± 4.11	29.59 ± 4.64	33.35 ± 3.45	42.22 ± 1.93	79.60
3.	H2O2 radical scavenging	J. regia extract	–	–	–	28.95 ± 4.51	–
		Standard (ascorbic acid)	–	–	–	87.99 ± 0.2	–

Note: Average ± SEM (standard error of mean) (n = 3) is used to express all data.