Table 1.
Phytochemical analysis of grape pomace from cv. Fetească neagră 2015.
| GP | TPI (mg catechin equivalent/g d.w.) |
TC (mg epicatechin/g d.w.) |
TAC (malvidin-3-O-glucoside mg/g d.w.) |
|
|---|---|---|---|---|
| FNFs | 114.71 ± 15.86 | 63.15 ± 7.12 | 184.84 ± 17.13∗∗∗ | |
| FNFr | 161.58 ± 3.42∗∗ | 113.98 ± 4.39∗∗∗ | 47.67 ± 5.0 | |
|
| ||||
| Proanthocyanidins (mg/g d.w.) |
mDP | PD% | G% | |
|
| ||||
| FNFs | 25.57 ± 3.82 | 6.29 ± 0.16n.s. | 8.18 ± 0.49∗∗ | 19.93 ± 0.41 |
| FNFr | 28.71 ± 9.78∗ | 5.64 ± 1.33 | 3.91 ± 1.12 | 21.69 ± 1.50n.s. |
|
| ||||
| ∑ flavan-3-ol monomers (mg/g d.w.) |
(+)-catechin (mg/g d.w.) |
(−)-epicatechin (mg/g d.w.) |
epicatechin-3-O-gallate (mg/g d.w.) |
|
|
| ||||
| FNFs | 2.05 ± 0.21 | 1.12 ± 0.10 | 0.87 ± 0.09 | 0.06 ± 0.01 |
| FNFr | 4.71 ± 0.17∗∗ | 2.59 ± 0.01∗∗ | 2.05 ± 0.16∗∗ | 0.07 ± 0.00n.s. |
|
| ||||
| Transresveratrol (μg/g d.w.) |
cis-resveratrol (μg/g d.w.) | Transpiceid (μg/g d.w.) |
cis-Piceid (μg/g d.w.) |
|
|
| ||||
| FNFs | 3.22 ± 1.91∗∗ | 5.03 ± 1.09 | 53.54 ± 10.53∗∗ | 33.04 ± 8.14∗∗ |
| FNFr | 0.58 ± 1.01 | 12.27 ± 3.07∗∗ | 14.31 ± 2.25 | 7.67 ± 1.99 |
Values are expressed as average ± standard deviation (n = 3) n.s.p > 0.05, ∗p < 0.05, ∗∗p < 0.01, and ∗∗∗p < 0.001. GP: grape pomace; Fs: fresh; Fr: fermented; FN: Fetească neagră; TPI: total phenolic index; TC: tannins concentration; TAC: total anthocyanin content; mDP: mean degree of polymerization; PD: prodelphinidins; G%: galloylation.