Table 1.
Free radical scavenging ability of the compounds isolated from Ziziphus oxyphylla.
| Compound | Concentrations (μg/mL) | DPPH Percent inhibition (mean ± S.E.M) | DPPH IC50 (μg/mL) | ABTS percent inhibition (mean ± S.E.M) | ABTS IC50 (μg/mL) |
|---|---|---|---|---|---|
| V | 1000.0 | 85.8 ± 0.3∗∗∗∗ | 59 | 84.4 ± 1.0∗∗∗∗ | 62 |
| 500.0 | 76.1 ± 1.2∗∗∗∗ | 75.5 ± 1.2∗∗∗∗ | |||
| 250.0 | 67.6 ± 0.5∗∗∗∗ | 66.6 ± 1.2∗∗∗ | |||
| 125.0 | 59.5 ± 0.4∗∗ | 57.3 ± 1.6∗∗∗∗ | |||
| 62.5 | 51.8 ± 1.2ns | 50.2 ± 1.3∗∗ | |||
| VI | 1000.0 | 82.1 ± 1.2∗∗∗∗ | 67 | 81.2 ± 1.0∗∗∗∗ | 67 |
| 500.0 | 72.3 ± 0.3∗∗∗∗ | 71.0 ± 1.6∗∗∗∗ | |||
| 250.0 | 63.7 ± 0.8∗∗∗∗ | 61.1 ± 1.4∗∗∗ | |||
| 125.0 | 54.7 ± 2.1∗∗ | 56 .1 ± 1.7∗∗ | |||
| 62.5 | 48.2 ± 2.3 ns | 48.2 ± 1.3∗∗ | |||
| VII | 1000.0 | 80.4 ± 1.1∗∗∗∗ | 118 | 80.1 ± 1.0∗∗∗∗ | 115 |
| 500.0 | 71.2 ± 1.3∗∗∗∗ | 71.2 ± 2.1∗∗∗∗ | |||
| 250.0 | 62.5 ± 1.1∗∗∗∗ | 62.1 ± 1.3∗∗∗ | |||
| 125.0 | 51.9 ± 1.3∗∗ | 51 .4 ± 1.4∗∗ | |||
| 62.5 | 46.7 ± 2.1∗∗ | 46.1 ± 1.9∗∗ | |||
| Ascorbic acid | 1000.0 | 93.2 ± 0.1 | 38 | 93.0 ± 0.7 | 39 |
| 500.0 | 84.1 ± 0.4 | 83.1 ± 1.1 | |||
| 250.0 | 73.8 ± 2.2 | 72.1 ± 0.4 | |||
| 125.0 | 63.2 ± 1.1 | 62 .1 ± 1.0 | |||
| 62.5 | 52.2 ± 2.3 | 52.1 ± 1.1 |
Data presented as mean ± SEM; values differ significantly compared to the positive control, ns: P > 0.05∗: P < 0.05, ∗∗∗: P < 0.001,. n = 3.