Table 2.
Yield and total phenolic compounds (TPC), flavonoids (TFC), and proanthocyanidins (TPrC) content in agri-food extracts.
| Extract (Abbreviation) | Yield % | TPC (g GAE/100 g dried extract) | TFC (g Hyp/100 g dried extract) | TPrC (g Cyanidin Chloride/100 g dried extract) |
|---|---|---|---|---|
| Red Grape marc UAE (RG UAE) | 23.26 ± 0.30 | 259.20 ± 8.47 | 13.59 ± 1.10 | 89.70 ± 5.44 |
| Red Grape marc NAV (RG NAV) | 11.29 ± 0.64 | 205.59 ± 7.75 | 21.88 ± 1.32 | 61.76 ± 6.72 |
| White Grape marc UAE (WG UAE) | 30.55 ± 0.71 | 197.26 ± 5.32 | 4.40 ± 0.24 | 31.36 ± 1.38 |
| White Grape marc NAV (WG NAV) | 14.26 ± 0.92 | 165.43 ± 20.73 | 10.85 ± 1.28 | 33.50 ± 3.21 |
| Red Grapevine Leaves (RGL UAE) | 15.27 ± 0.72 | 253.19 ± 11.41 | 113.48 ± 3.24 | 10.02 ± 0.18 |
| Red Grapevine Leaves (RGL NAV) | 11.75 ± 0.84 | 148.21 ± 1.10 | 126.41 ± 10.25 | 3.54 ± 0.18 |
| Grape seeds UAE (VIN) | 9.32 ± 0.48 | 514.26 ± 5.70 | 60.56 ± 3.51 | 92.17 ± 7.10 |
| Grape stalks UAE (GS) | 31.72 ± 0.54 | 198.95 ± 10.40 | 22.24 ± 0.51 | 9.14 ± 0.09 |
| Pear (PE) | 24.34 ± 0.22 | 105.94 ± 9.84 | 17.96 ± 1.25 | 3.56 ± 0.11 |
| Apple (AP) | 34.07 ± 2.33 | 29.50 ± 1.53 | 3.88 ± 0.33 | 0.80 ± 0.08 |
| Green Bean (GB) | 37.92 ± 1.83 | 41.17 ± 1.11 | 8.99 ± 0.63 | 0.96 ± 0.03 |
| Tomato (TO) | 15.97 ± 0.82 | 17.56 ± 0.55 | 7.33 ± 2.06 | 0.58 ± 0.04 |
| Spent Hops UAE (HW) | 22.83 ± 0.03 | 18.84 ± 0.32 | 15.06 ± 1.33 | 1.26 ± 0.02 |
TPC, total phenolic content; TFC, total flavonoid content; TPrC, total proanthocyanidin content; GAE, gallic acid equivalent; Hyp, hyperoside.