Table 4.
Radical scavenging, reducing power, ferrous ion chelating, and total antioxidant (by phosphomolybdenum and β-carotene bleaching methods) activities of S. perfoliata extracts.x
| Radical scavenging activity (mg TEs/g extract) | Reducing power (mg TEs/g extract) | β-carotene bleaching (%)y |
Phosphomolybdenum (mg AAEs/g extracts) |
Ferrous ion chelating (mg EDTAEs/g extracts) |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| DPPH | ABTS | Superoxide | Nitric oxide | Potassium ferricyanide |
CUPRAC | FRAP | ||||
| Ethyl acetate | 101.61 ± 0.64c | 89.47 ± 6.58b | 39.74 ± 3.02c | 42.15 ± 12.86b | 109.14 ± 2.02b | 92.41 ± 5.93b | 58.79 ± 1.75c | 22.32 ± 0.59e | 87.21 ± 6.70c | 3.01 ± 0.91b |
| Methanol | 266.25 ± 1.07b | 136.53 ± 0.01a | 150.00 ± 0.60b | 205.37 ± 15.78a | 219.57 ± 0.59a | 197.89 ± 14.79a | 137.95 ± 0.07b | 17.31 ± 0.62f | 140.09 ± 5.38b | 6.21 ± 0.84b |
| Water | 405.53 ± 8.59a | 149.71 ± 3.29a | 159.62 ± 2.12a | 209.09 ± 12.86a | 225.88 ± 0.42a | 210.69 ± 5.47a | 161.19 ± 0.96a | 49.58 ± 0.34d | 222.39 ± 15.34a | 40.79 ± 2.96a |
| BHA | – | – | – | – | – | – | – | 80.30 ± 0.61b | – | – |
| BHT | – | – | – | – | – | – | – | 76.67 ± 0.41c | – | – |
| Trolox | – | – | – | – | – | – | – | 85.58 ± 0.04a | – | – |
xDifferent subscripts in the same row indicate significant difference (by ANOVA, p < 0.05). TEs, AAEs, and EDTAEs, trolox, ascorbic acid, and ethylenediaminetetraacetic acid (disodium salt) equivalents, respectively. y Given as percentage of % inhibition of the linoleic acid at 2 mg/ml concentration.