Table 3.
Contents of total phenolics determined by Folin–Ciocalteu assay, and the antioxidant activity (DPPH) of chestnut seeds and shells.
| Parameter | Seed | Inner Shell | Outer Shell | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Raw | Boiled | Roasted, Microwave |
Roasted, Oven |
Fried | Raw | Boiled | Roasted, Microwave |
Roasted, Oven |
Fried | Raw | Boiled | Roasted, Microwave |
Roasted, Oven |
Fried | |
| Total phenolic content (mg GAE/g DW) a |
8.98 ± 0.33 | 9.14 ± 0.51 | 8.86 ± 0.36 | 9.43 ± 0.05 | 9.02 ± 0.03 | 54.04 ± 0.27 | 55.44 ± 0.53 | 54.49 ± 0.32 | 56.82 ± 0.76 | 54.90 ± 0.42 | 45.01 ±0.17 | 45.80 ± 0.44 | 45.03 ± 0.69 | 46.09 ± 0.57 | 45.23 ± 0.28 |
| Antioxidant activity (mg TE/g DW) b |
2.81 ± 0.58 | 3.51 ± 0.08 | 3.36 ± 0.14 | 3.37 ± 0.38 | 3.42 ± 0.31 | 5.25 ± 0.17 | 4.75 ± 0.84 | 5.39 ± 0.20 | 5.30 ± 016 | 5.04 ± 0.06 | 5.04 ± 0.45 | 4.93 ± 0.47 | 5.28 ± 0.31 | 5.09 ± 0.73 | 4.72 ± 0.15 |
a Contents of total phenolics expressed as mg gallic acid equivalent (GAE)/g dry weight (DW); b antioxidant activity expressed as mg trolox equivalent (TE)/g dry weight (DW).