Table 2.

Total reducing power, nitric oxide, and superoxide radical scavenging activity of different concentrations of AA, BHA, BVRW, BVRA, BVSW, and BVSA

Group (mcg/ml)	Reducing power (Absorbance)	Nitric oxide scavenged (%)	Superoxide radical scavenged (%)
AA
100	0.09 ± 0.01	-	-
200	0.19 ± 0.02	-	-
300	0.61 ± 0.03	-	-
400	0.77 ± 0.01	-	-
500	1.47 ± 0.05	-	-
BHA
100	0.13 ± 0.012a	13.95 ± 0.41	20.51 ± 0.66
200	0.24 ± 0.012a	20.86 ± 0.43	29.20 ± 0.45
300	0.80 ± 0.052a	34.20 ± 0.18	38.36 ± 0.39
400	1.08 ± 0.022a	40.11 ± 0.15	56.11 ± 0.12
500	1.75 ± 0.022a	60.86 ± 0.41	65.78 ± 0.51
BVRW
100	0.01 ± 0.00	11.84 ± 0.21	20.40 ± 0.101b
200	0.05 ± 0.00	18.78 ± 0.13	29.50 ± 0.161b
300	0.10 ± 0.01	28.68 ± 0.26	35.98 ± 0.17
400	0.24 ± 0.03	35.01 ± 0.16	39.46 ± 0.19
500	0.74 ± 0.03	52.61 ± 0.41	50.67 ± 0.45
BVRA
100	0.04 ± 0.01	12.44 ± 0.61	33.44 ± 0.623b
200	0.09 ± 0.01	21.65 ± 0.141b	36.48 ± 0.503b
300	0.40 ± 0.02	32.18 ± 0.13	39.00 ± 0.242b
400	0.80 ± 0.011a	39.86 ± 0.111b	45.84 ± 0.201b
500	1.65 ± 0.031a	59.12 ± 0.121b	55.90 ± 0.25
BVSW
100	0.01 ± 0.00	14.86 ± 0.441b	32.64 ± 0.673b
200	0.04 ± 0.01	23.84 ± 0.541b	34.21 ± 0.723b
300	0.13 ± 0.02	30.14 ± 0.11	41.97 ± 0.122b
400	0.21 ± 0.01	35.64 ± 0.61	45.95 ± 0.671b
500	1.05 ± 0.03	54.80 ± 0.31	56.80 ± 0.94
BVSA
100	0.05 ± 0.00	10.86 ± 0.84	30.40 ± 0.663b
200	0.09 ± 0.00	20.68 ± 0.541b	35.62 ± 0.863b
300	0.47 ± 0.02	31.68 ± 0.31	50.10 ± 0.163b
400	0.82 ± 0.01	40.58 ± 0.111b	54.03 ± 0.241b
500	1.60 ± 0.081a	61.05 ± 0.381b	56.90 ± 0.09

Values are mean ± SD, (n = 3); ¹P < 0.05, ²P < 0.01, ³P < 0.001 as compared to ^aAA, ^bBHA. AA: Ascorbic acid; BHA: Butylated hydroxy anisole; BVRW, BVRA, BVSW, BVSA: Bauhinia variegata root water, ethanolic and Bauhinia variegata stem water and ethanolic extracts, respectively