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| samples | TFC mg QUE/g dry extract | ||
|---|---|---|---|
| ethanolic extract | sequential extract (before acid hydrolysis) | sequential extract (after acid hydrolysis) | |
| rhizomes of Z. officinale | 2.46 ± 0.09 | 3.71 ± 0.06 | 4.04 ± 0.05 |
