Table 5.
Antioxidant activity of citrus fiber/blackberry juice complexes (µmol TE/100 g).
| Samples | DPPH | ABTS | FRAP | CUPRAC |
|---|---|---|---|---|
| After preparation | ||||
| CF_1%/B | 50.39 ± 1.54 b | 52.83 ± 0.03 c | 9.71 ± 0.51 b | 515.00 ± 10.00 b |
| CF_2%/B | 47.86 ± 1.96 b | 45.35 ± 0.08 b | 8.89 ± 0.60 b | 509.00 ± 12.00 b |
| CF_4%/B | 36.48 ± 1.77 a | 29.60 ± 0.14 a | 6.65 ± 0.36 a | 362.00 ± 4.00 a |
| After storage | ||||
| CF_1%/B | 49.84 ± 1.13 c | 51.30 ± 0.03 c | 9.13 ± 0.47 c | 509.41 ± 2.57 c |
| CF_2%/B | 45.07 ± 0.71 b | 37.58 ± 0.74 b | 8.02 ± 0.10 b | 453.81 ± 1.50 b |
| CF_4%/B | 35.48 ± 0.38 a | 24.78 ± 0.47 a | 6.30 ± 0.19 a | 351.34 ± 2.79 a |
DPPH (2,2-diphenyl-1-picrylhydrazyl)—free radical scavenging activity; ABTS (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)—radical scavenging activity; FRAP–ferric reducing antioxidant power; CUPRAC–cupric reducing antioxidant capacity; CF—citrus fiber; 1%, 2% and 3%—amounts of CF; B—blackberry juice; TE—trolox equivalent. Within each column (separate for freshly prepared and stored samples), means followed by different letters of superscripts are significantly different at p ≤ 0.05 (ANOVA, Fisher’s LSD).