Table 7.
TFC and in vitro cell-free antioxidant activity of the different extracts from N. lotus stamen.
| Sample | TFC (mg/g DW) |
DPPH (µmol TEAC 1/g) |
ABTS (µmol TEAC 1/g) |
FRAP (µmol TEAC 1/g) |
|---|---|---|---|---|
| HRE | 169.64 ± 9.86 c | 2134.37 ± 130.84 c | 2488.95 ± 344.45 c | 1270.71 ± 65.53 a |
| UAE | 235.45 ± 5.44 b | 3167.85 ± 342.64 b | 3218.56 ± 234.90 b | 2405.25 ± 315.86 b |
| MPR | 475.42 ± 16.61 a | 4749.67 ± 166.05 a | 4710.67 ± 155.64 a | 3601.74 ± 126.26 a |
| BHT | - | 3059.07 ± 401.32 b | 4378.12 ± 106.62 a | 1724.12 ± 161.27 b |
1 TEAC: Trolox C equivalent antioxidant capacity. HRE: heat reflux extraction; UAE: ultrasound assisted extraction; MPR: UAE following by DAX-8 MPR purification step. Values are means ± SD of three independent experiments. Different letters represent significant differences between the various extraction conditions (p < 0.05).