Table 2.
Antioxidant activity of dragon fruits harvested in Israel (DI) and Thailand (DT) (mean value ± SD).
| Parameter | Dragon Fruits from Israel (DI) | Dragon Fruits from Thailand (DT) | ||
|---|---|---|---|---|
| Methanol (DIM) | Water (DIW) | Methanol (DTM) | Water (DTW) | |
| ABTS [µM Trolox/gDW] | 21.85 ± 0.73 a2b1 | 24.49 ± 0.94 a2c1 | 15.82 ± 0.42 b1 | 17.53 ± 0.58 c1 |
| CUPRAC [µM Trolox/gDW] | 22.28 ± 0.70 a1c1 | 26.57 ± 1.15 a1d1 | 16.14 ± 0.61 b2c1 | 18.98 ± 0.50 b2d1 |
| DPPH [µM Trolox/gDW] | 13.65 ± 0.37 a3b1 | 14.69 ± 0.46 a3c1 | 5.11 ± 0.28 b1 | 5.04 ± 0.18 c1 |
| FRAP [µM Trolox/gDW] | 9.06 ± 0.57 a3b2 | 10.76 ± 0.76 a3c1 | 6.77 ± 0.13 b2 | 7.86 ± 0.35 c1 |
Means and standard deviations for antioxidant capacity (n = 3) studied in dragon fruits (results marked with the same letter in upper index within each row differ significantly; levels of significance 1: p < 0.001, 2: p < 0.01, 3: p < 0.05). Abbreviations: ABTS-2, 2-Azino-bis (3-ethyl-benzothiazoline-6-sulfonic acid) diammonium salt; CUPRAC-Cupric reducing antioxidant capacity; DPPH-1,1-Diphenyl-2-picrylhydrazyl; FRAP-Ferric-reducing/antioxidant power.