Table 1 Chemical composition of tannin extracts in different fractions (details see below) after Sephadex LH-20 purification. F1: fraction eluted with 30% acetone; F2: fraction eluted with 50% acetone; F3: fraction eluted with 80% acetone; TP: Total polyphenols; TT: Total tannins; TF: Total Flavonoids, HTs: Hydrolysable tannins; PA: Proanthocyanidins; mDP: mean degree of polymerization; PD%: prodelphinidin percentage.
Species | Fraction | TP (mg/g) | TT (mg/g) | TF (mg/g) | HTs (mg/g) | PA (mg/g) | mDP | PD % |
|---|---|---|---|---|---|---|---|---|
Birdsfoot trefoil | F1 | 117.8 | 100.6 | 17.2 | 12.1 | 88.6 | 7.8 | 48.3 |
Birdsfoot trefoil | F2 | 239.8 | 229.1 | 10.7 | 39.6 | 189.6 | 14.7 | 51.3 |
Birdsfoot trefoil | F3 | 220.0 | 208.5 | 11.5 | 46.3 | 162.3 | 13.9 | 49.4 |
Sulla | F1 | 340.2 | 335.0 | 5.2 | 1.1 | 333.9 | 12.9 | 91.1 |
Sulla | F2 | 370.8 | 367.4 | 3.4 | 0.8 | 366.6 | 17.7 | 92.3 |
Sulla | F3 | 341.6 | 341.4 | 0.2 | 0.6 | 340.9 | 24.7 | 92.6 |
Big trefoil | F1 | 264.2 | 258.1 | 6.1 | 0.5 | 257.5 | 15.3 | 86.5 |
Big trefoil | F2 | 339.4 | 331.6 | 7.8 | 0.5 | 331.1 | 14.7 | 83.2 |
Big trefoil | F3 | 293.3 | 292.2 | 1.1 | 0.9 | 291.3 | 21.5 | 88.0 |
Salad burnet | F1 | 172.7 | 165.5 | 7.2 | 151.6 | 13.9 | 3.9 | 41.1 |
Salad burnet | F2 | 183.6 | 182.1 | 1.5 | 166.9 | 15.2 | 6.7 | 59.1 |
Salad burnet | F3 | 179.1 | 178.4 | 0.7 | 171.1 | 7.3 | 4.3 | 36.9 |
