Table 2.
Proanthocyanidin, condensed tannin and flavonoid contents of CoTE and its soluble fractions.
| Specimen | TFC |
TPAC |
CTC |
|
|---|---|---|---|---|
| QE/extract (mg/g) | RE/extract (mg/g) | CE/extract (mg/g) | ME/extract (mg/g) | |
| Crude | 1.4 ± 0.0c | 10.7 ± 0.1c | 402.6 ± 2.9b | 258.2 ± 5.7b |
| HSF | 0.0 ± 0.1d | 0.5 ± 0.2d | 1.5 ± 0.3e | 22.7 ± 0.3e |
| EASF | 6.0 ± 0.1a | 52.7 ± 1.0a | 88.4 ± 1.0d | 90.6 ± 0.7d |
| BSF | 4.1 ± 0.1b | 21.6 ± 0.4b | 561.1 ± 2.4a | 331.5 ± 3.8a |
| WSF | 0.0 ± 0.0d | 0.7 ± 0.1d | 189.0 ± 1.9c | 125.5 ± 3.2c |
Mean ± SE (n = 3). Different letters (a–e) in the table are significantly different at the level of p < 0.05 according to Scheffe's test. HSF = n-hexane soluble fraction, EASF = ethyl acetate soluble fraction, BSF = n-butanol soluble fraction, WSF = water soluble fraction. TFC = total flavonoid contents, TPAC = total proanthocyanidin contents, CTC = condensed tannin contents, CE = (+)-catechin equivalent, ME = melacacidin equivalent, QE = quercetin equivalent, RE = rutin equivalent.