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. 2021 Oct 15;10(10):2192. doi: 10.3390/plants10102192

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).