Table 3.
Free radical scavenging potential of Newbouldia laevis measured as % inhibition
| Antioxidant activity (% Inhibition ) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Conc (μg/ml) | Hydroxyl radical (OH . ) | Superoxide anion (O 2 .- ) | Iron chelating | Nitric oxide radical (NO) | Peroxynitrite (ONOO − ) | Singlet oxygen ( 1 O 2 ) | Hypochlorous acid (HOCl) | DPPH | Lipid peroxidation (LPO) | FRAP (mM) |
| 10 | 25.80 ± 0.03a | 30.60 ± 0.05a | 40.10 ± 0.02a | 41.06 ± 0.04a | 15.60 ± 0.01a | 53.64 ± 0.72a | 09.60 ± 0.12a | 42.64 ± 1.12a | 53.64 ± 0.82 a | 08.07 ± 0.31a |
| 50 | 28.85 ± 0.01a | 40.65 ± 0.04b | 46.58 ± 0.04a | 49.75 ± 0.08b | 25.85 ± 0.04b | 59.10 ± 0.09a | 25.85 ± 0.31b | 45.85 ± 0.10a | 65.85 ± 0.09a 1 | 18.10 ± 0.11a |
| 100 | 50.83 ± 0.11b | 62.74 ± 0.12c | 65.38 ± 0.07b | 55.13 ± 0.09b | 35.83 ± 0.09c | 71.62 ± 2.46b | 35.83 ± 0.05c | 65.85 ± 0.11b | 85.85 ± 0.14b | 30.15 ± 0.15b |
| 200 | 62.97 ± 0.04c | 69.79 ± 0.08c | 71.67 ± 0.09c | 61.86 ± 0.07c | 48.97 ± 0.09d | 86.16 ± 1.10c | 48.97 ± 0.09d | 79.85 ± 0.19c | 89.85 ± 0.16b | 50.09 ± 1.20c |
| 400 | 76.10 ± 0.02d | 81.11 ± 0.07d | 90.11 ± 0.08d | 80.08 ± 0.06d | 62.10 ± 0.11e | 96.00 ± 0.12d | 62.10 ± 0.11e | 85.85 ± 0.18c | 91.85 ± 0.34c | 64.01 ± 2.52d |
Data are expressed as mean ± standard deviation (n = 6); mean in the same column with different superscripts are significantly different using Duncan’s multiple range test at p <0.05.