Table 2.
Superoxide radical scavenging activity of G. pedunculata and G. cowa bark extracts
| Extract | G. Pedunculata | G. cowa | ||
|---|---|---|---|---|
| Conc. (ppm) | % antioxidant activity | Conc. (ppm) | % antioxidant activity | |
| Hexane | – | – | 25 50 75 |
13.6 32.32 95.95 |
| Ethyl acetate | 50 100 500 |
28.85 45.56 81.29 |
50 100 200 |
10.29* 40.19* 70.58 |
| Acetone | 5 25 100 |
37.05 62.15 90.03 |
50 100 200 |
29.90 63.30 80.88 |
| Methanol | 50 100 500 |
22.9 34.63 99.30 |
50 100 200 |
15.68* 37.25* 65.68 |
| 90 % methanol | 100 500 |
9.5 12.62 |
– | – |
The values are mean ± SD of three experiments. * indicates significance at (P < 0.05)