Open Access
Table 3
Composition of phenolic substances in aqueous-alcoholic extracts of grape pomace
| Name of polyphenols | Mass concentration of polyphenols, mg/kg | ||||
|---|---|---|---|---|---|
| Saperavi | Cabernet Sauvignon | Merlot | Pinot Noir | Rebo | |
| Anthocyanins | |||||
| Delphinidin-3 -O-glycoside | 28 | 24 | 28 | 26 | 31 |
| Cyanidin-3-O-glycoside | 16 | 14 | 10 | 18 | 18 |
| Peonidin-3 -O-glycoside | 14 | 12 | 8 | 15 | 12 |
| Petunidin-3-O-glycoside | 2.5 | 2.0 | 0.8 | 3.2 | 2.5 |
| Malvidin-3-O-glycoside | 172 | 144 | 102 | 136 | 147 |
| Delphinidin-3-O- (6'-acetyl glycoside) | 17 | 12 | 10 | 15 | 17 |
| Cyanidin-3-O- (6'-acetyl-glycoside) | 2.4 | 1.8 | 0.8 | 1.7 | 1.9 |
| Peonidin-3-O- (6'-acetyl-glycoside) | 4.7 | 4.2 | 2.8 | 3.1 | 3.6 |
| Petunidin-3-O- (6'-acetyl-glycoside) | 2.7 | 2.7 | 2.2 | 3.1 | 2.6 |
| Malvidin-3-O- (6'-acetyl-glycoside) | 3.2 | 2.7 | 1.8 | 2.8 | 3.4 |
| Delphinidin-3-O- (6'-p-coumaroyl-glycoside) | 2.2 | 1.8 | 1.3 | 2.3 | 2.1 |
| Petunidin-3-O- (6'-p-coumaroyl-glycoside) | 1.1 | 0.7 | 0.6 | 0.9 | 0.9 |
| Malvidin -3-O- (6'-p-coumaroyl glycoside) | 3.2 | 3.4 | 2.8 | 2.6 | 3.5 |
| Flavones | |||||
| Quercetin | 47 | 45 | 36 | 43 | 51 |
| Flavan-3-ols | |||||
| (+) - D-Catechin | 587 | 564 | 522 | 564 | 611 |
| (-) - Epicatechin | 342 | 320 | 308 | 327 | 376 |
| (-) - Epicatechingallate | 10 | 12 | 8 | 8 | 13 |
| Hydroxycinnamic acids | |||||
| Caftaric acid | 48 | 44 | 46 | 41 | 52 |
| Cautaric acid | 12 | 17 | 11 | 17 | 16 |
| n-Coumaric acid | 15 | 13 | 11 | 15 | 15 |
| Hydroxybenzoic acids | |||||
| Gallic acid | 257 | 233 | 218 | 245 | 154 |
| Lilac acid | 256 | 233 | 198 | 224 | 265 |
| Caffeic acid | 195 | 215 | 159 | 251 | 126 |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.