Table 4.
In vitro hydroxyl radical scavenging activities of methanolic extracts of C. volkensii, V. lasiopus, and A. hockii.
| Hydroxyl radical scavenging activity (% inhibition) | ||||
|---|---|---|---|---|
| Concentration in mg/ml | L-ascorbic acid | C. volkensii | V. lasiopus | A. hockii |
| 0.0625 | 87.50 ± 1.30aA | 66.99 ± 0.32aD | 73.93 ± 0.91aC | 81.52 ± 0.28aB |
| 0.125 | 80.56 ± 0.65bA | 56.41 ± 0.37bD | 61.75 ± 0.83bC | 73.56 ± 0.28bB |
| 0.25 | 73.29 ± 2.03cA | 46.69 ± 0.36cD | 53.74 ± 0.65cC | 63.14 ± 0.56cB |
| 0.5 | 62.39 ± 0.39dA | 40.71 ± 0.56dD | 47.22 ± 0.21dC | 50.86 ± 0.39dB |
| 1 | 50.64 ± 0.68eA | 30.98 ± 0.28eD | 38.46 ± 0.56eC | 43.38 ± 0.28eB |
|
| ||||
| IC 50 | 1.05 | 0.11 | 0.23 | 0.49 |
The values are expressed as mean ± SEM. Values with the same uppercase superscript letter within the same row and those with the same lowercase subscript letter within the same column are not significantly different (P > 0.05, one-way ANOVA followed by Tukey's test).