Table 6.

DPPH scavenging % of A. nilotica flower extract and ascorbic acid.

Concentration (µg/mL)	Ascorbic Acid			Flower Extract
	OD Mean	DPPH Scavenging %	SD	OD Mean	DPPH Scavenging %	SD
1000	0.049	97.0	0.002	0.322	80.6	0.007
500	0.091	94.5	0.004	0.437	73.6	0.007
250	0.122	92.7	0.005	0.572	65.5	0.004
125	0.225	86.4	0.006	0.689	58.4	0.008
62.50	0.365	78.0	0.006	0.787	52.6	0.005
31.25	0.478	71.2	0.004	0.866	47.8	0.009
15.63	0.593	64.2	0.005	0.956	42.3	0.010
7.81	0.725	56.3	0.003	1.054	36.4	0.009
3.90	0.898	45.8	0.002	1.130	31.8	0.004
1.95	0.966	41.7	0.007	1.215	26.7	0.003
0	1.658	0.0	0.004	1.658	0.0	0.004
IC50	4.08 µg/mL			36.74 µg/mL