Table 2.
Antioxidant effect (EC50) on hydrogen peroxide radicals, ABTS radicals, inhibition of β carotene and chelating power of methanol extract and soluble fractions of C. opaca leaves
| Plant extracts/chemical | EC50, µg/ml | |||
|---|---|---|---|---|
| Scavenging ability on hydrogen peroxide radicals | Scavenging ability on ABTS radicals | β-carotene bleaching inhibition | Chelating power | |
| MLC | 155 ± 3.2b | 104 ± 4.6b | >250c | 49 ± 1.9b |
| HLC | 19 ± 1.1a | 133 ± 3.5c | 157 ± 3.12b | 16 ± 0.98a |
| ELC | 225 ± 6.39c | 176 ± 4.0d | 145 ± 4.3b | 73 ± 2.9c |
| CLC | 160 ± 4.7b | 181 ± 3.1d | >250c | 16 ± 1.1a |
| BLC | >250d | 70 ± 3.2a | >250c | 50 ± 2.3b |
| ALC | 243 ± 2.5c | 187 ± 3.8d | >250c | 137 ± 3.76d |
| Ascorbic acid | 23.04 ± 1.7a | 67 ± 2.5a | – | – |
| Catechin | – | – | 38 ± 2.8a | 20 ± 1.2a |
| Rutin | 29.04 ± 1.5a | – | – | – |
–, Not determined
Each value in the table is represented as mean ± SD (n = 3)
Values in the same column followed by a different letter are significantly different (p < 0.05)