Table 2.
Antioxidant activity (%) of four Omani medicinal plants.
| Plant Species | Fractions | Antioxidant activity IC50 ± S.E.M (μg/mL) |
|---|---|---|
| J. excelsa | n-Hexane | Nd |
| DCM | Nd | |
| EtOAc | 402 ± 2.15 | |
| n-BuOH | 428 ± 1.54 | |
| MeOH | Nd | |
| Aqueous | Nd | |
| E. pinifolius | n-Hexane | Nd |
| DCM | Nd | |
| EtOAc | 378 ± 1.56 | |
| n-BuOH | 904 ± 2.68 | |
| MeOH | Nd | |
| Aqueous | Nd | |
| H. lippii | n-Hexane | 788 ± 2.68 |
| DCM | 658 ± 1.54 | |
| EtOAc | 146 ± 1.39 | |
| n-BuOH | 561 ± 1.34 | |
| MeOH | 368 ± 2.18 | |
| Aqueous | 460 ± 1.21 | |
| D. viscosa | n-Hexane | Nd |
| DCM | Nd | |
| EtOAc | 386 ± 1.65 | |
| n-BuOH | 467 ± 1.84 | |
| MeOH | 914.±2.61 | |
| Aqueous | Nd | |
| Ascorbic acid | 6.25 ± 0.56 |
Ascorbic acid∗= μM; DCM: dichloromethane; EtOAc: ethyl acetate; BuOH: n-butanol; MeOH: methanol; SEM: standard error mean; Nd: not determined (Conc. = 1 mg/mL).