Table 4.
DPPH radical-scavenging activity.
| Extracts Type | M. charantia | M. lucida | ||
|---|---|---|---|---|
| IC50 (mg/mL) | AAI | IC50 (mg/mL) | AAI | |
| Water | >10 | nd | 3.35 ± 1.20 | 0.01 ± 0.11 |
| Ethanol | 1.24 ± 0.07 | 0.04 ± 0.01 | 1.53 ± 0.37 | 0.03 ± 0.00 |
| Ethyl acetate | 1.25 ± 0.21 | 0.04 ± 0.02 | 7.02 ± 09 | 0.01 ± 0.00 |
| Acetone | 1.03 ± 0.11 | 0.05 ± 0.02 | 0.91 ± 0.02 | 0.05 ± 0.00 |
| Dichloromethane | >10 | nd | >10 | nd |
| Methanol | 1.30 ± 0.12 | 0.03 ± 0.01 | 0.51 ± 0.01 | 0.10 ± 0.00 |
| Chloroform | 6.95 ± 0.21 | 0.01 ± 0.00 | >10 | nd |
| Petroleum Ether | >25 | nd | >25 | nd |
| Ethanol/water | 2.36 ± 0.08 | 0.02 ± 0.00 | 1.00 ± 0.00 | 0.05 ± 0.00 |
| Methanol/1%HCl | 1.14 ± 0.02 | 0.04 ± 0.00 | 6.05 ± 0.13 | 0.01 ± 0.07 |
| Methanol/HCl-PE | 3.60 ± 0.26 | 0.01 ± 0.00 | - | - |
| Methanol-EA | 1.33 ± 0.11 | 0.03 ± 0.01 | - | - |
| Reference compound | IC50 (µg/mL) | AAI | - | - |
| Ascorbic acid | 0.38 ± 0.02 | 130.57 ± 5.14 | - | - |
| Gallic acid | 0.69 ± 0.01 | 71.78 ± 1.17 | - | - |
AAI: antioxidant activity index, nd: not determined.