Table 4.
Influence of particle size on antioxidant properties of absolute ethanolic extracts
| Particle size (mm) | Total flavonoid content (mg CE L−1) | Total phenol content (mg GAE L−1) | ABTS (mg TE L−1) | Peroxide scavenging activity (%) | Iron chelating activity (%) | DPPH (%) |
|---|---|---|---|---|---|---|
| Tea | ||||||
| 0.425 | 10,183.33 ± 1,593 b | 453.26 ± 0.83b | 0.938 ± 0.02 a | 50.55 ± 4.46 ab | 77.72 ± 1.16 b | 97.27 ± 0.81 a |
| 0.710 | 16,641.66 ± 3,843 a | 466.12 ± 1.83 a | 0.838 ± 0.02 b | 56.90 ± 2.96 a | 72.99 ± 0.32 c | 96.75 ± 0.83 a |
| 1.180 | 12,225.00 ± 2,707 ab | 370.17 ± 4.32 c | 0.464 ± 0.05 c | 42.37 ± 5.05 b | 83.00 ± 1.68 a | 97.42 ± 0.19 a |
| Ginger | ||||||
| 0.425 | 3,850.00 ± 433 a | 260.88 ± 9.19 b | 0.908 ± 0.02 a | 72.77 ± 2.94 a | 75.39 ± 1.00 b | 95.64 ± 0.87 a |
| 0.710 | 3,350.00 ± 573 a | 281.71 ± 5.85 a | 0.923 ± 0.02 a | 79.49 ± 9.00 a | 84.63 ± 1.42 a | 97.47 ± 1.41 a |
| Tea–ginger | ||||||
| 0.425 | 8,850.00 ± 573 a | 322.31 ± 3.47 a | 0.951 ± 0.02 a | 83.76 ± 3.81 a | 91.53 ± 0.67 a | 98.72 ± 0.50 a |
| 0.710 | 8,183.33 ± 711 a | 281.24 ± 3.52 b | 0.883 ± 0.02 b | 77.66 ± 3.53 a | 89.48 ± 0.63 b | 98.35 ± 0.31 a |
Mean ± SD values in the same column and row heading followed by the same alphabet are not significantly different (p > .05) LSD. Data presented as mean of triplicate measurement.