Table 1.
2,2-Diphenyl-1-picrylhydrazyl (DPPH) reduction at different times by the tannin-coated nylon membrane filters. 1
| Sample | DPPH Reduced (%) (after 10 min) | DPPH Reduced (%) (after 2.5 h) |
|---|---|---|
| QT (0.5 mg/mL) in H2O | 85 ± 6 a | 81 ± 3 a |
| QT (0.1 mg/mL) in H2O | 83 ± 4 a | 81 ± 2 a |
| QT (0.02 mg/mL) in H2O | 56 ± 3 b | 83 ± 4 a |
| QT (0.1 mg/mL) + laccase in H2O | 79 ± 4 a | 84 ± 5 a |
| QT (0.1 mg/mL) + laccase in phosphate buffer (pH 6.0) | 61 ± 3 b | 85 ± 6 a |
| QT (0.1 mg/mL) in carbonate buffer (pH 9.0) | 41 ± 2 c | 67 ± 4 b |
| QT (0.1 mg/mL) + FeSO4 in H2O | 76 ± 4 a | 86 ± 6 a |
| CT (0.5 mg/mL) in H2O | 56 ± 3 b | 86 ± 6 a |
| CT (0.1 mg/mL) in H2O | 23 ± 1 d | 75 ± 3 a |
| CT (0.02 mg/mL) in H2O | 28 ± 1 e | 56 ± 3 c |
| CT (0.1 mg/mL) + laccase in H2O | 25 ± 1 d | 61 ± 3 b,c |
| CT (0.1 mg/mL) + laccase in phosphate buffer (pH 6.0) | 25 ± 1 d | 65 ± 4 b |
| CT (0.1 mg/mL) in carbonate buffer (pH 9.0) | 7 ± 1 f | 33 ± 2 d |
| CT (0.1 mg/mL) + FeSO4 in H2O | 40 ± 2 c | 82 ± 4 a |
1 Reported are the mean ± SD values of at least three experiments. Values in a column without a common letter (a–f) are significantly different (p < 0.05).