Table 2.
Phenolic compounds content and antioxidant properties of studied freeze-dried phenolic-rich plant powders.
| Compounds and Antioxidant Activity | BLUB | RASB | BLCB | POME | BEET |
|---|---|---|---|---|---|
| Phenolic Content | |||||
| Flavan-3-ols (mg/100 g DM) | |||||
| Cat | 35.41 ± 0.12 e | 30.70 ± 0.14 d | 10.09 ± 0.09 a | 11.56 ± 0.11 b | 21.87 ± 0.15 c |
| Ecat | 57.45 ± 0.24 d | 52.23 ± 0.19 b | 48.34 ± 0.18 a | 55.34 ± 0.26 c | 58.50 ± 0.31 e |
| PC B2 | 39.34 ± 0.17 d | 20.46 ± 0.19 c | 43.24 ± 0.21 e | 16.78 ± 0.13 b | 13.65 ± 0.10 a |
| PC C1 | 11.98 ± 0.08 e | 0.06 ± 0.02 a | 0.12 ± 0.03 c | 0.09 ± 0.02 b | 0.05 ± 0.02 a |
| Total | 144.18 ± 0.56 e | 103.45 ± 0.25 d | 101.79 ± 0.21 c | 83.77 ± 0.14 a | 94.07 ± 0.18 b |
| Anthocyanins (mg/100 g DM) | |||||
| Cy-3-Glu | nd | 3730.65 ± 10.87 a | 4370.09 ± 12.44 b | nd | nd |
| Cy-3-Rut | nd | nd | 59.76 ± 0.21 | nd | nd |
| Cy-3,5-diGlu | 10,280.60 ± 32.51 b | nd | nd | 98.69 ± 0.36 a | nd |
| Cy-3-Xyl | 4195.67 ± 14.41 b | nd | 164.86 ± 0.41 a | nd | nd |
| Cy-3-(6″-Mal-Glu) | nd | nd | 315.46 ± 0.65 b | nd | nd |
| Del-3,5-diGlu | 7697.48 ± 26.54 b | nd | nd | 31.56 ± 0.21 a | nd |
| Del-3-Glu | nd | nd | nd | 8.49 ± 0.07 | nd |
| Pel-3,5-diGlu | 10,759.88 ± 36.38 | nd | nd | nd | nd |
| Total | 32,933.63 ± 61.89 d | 3730.65 ± 10.87 b | 4910.17 ± 13.70 c | 138.74 ± 0.39 a | nd |
| Phenolic Acids (mg/100 g DM) | |||||
| GA | 9.36 ± 0.09 b | nd | 2.57 ± 0.05 a | nd | nd |
| PA | 6.14 ± 0.05 c | 3.19 ± 0.05 b | 2.24 ± 0.04 a | nd | 26.48 ± 0.11 d |
| p-HBA | 1.83 ± 0.03 a | 10.29 ± 0.08 b | 18.48 ± 0.12 d | 11.80 ± 0.06 c | 70.40 ± 0.19 e |
| Total | 17.33 ± 0.25 c | 13.48 ± 0.08 b | 23.29 ± 0.22 d | 11.80 ± 0.05 a | 96.88 ± 0.36 e |
| Total phenolics (mg/100 g DM) | 33,095.14 ± 62.70 e | 3847.58 ± 11.20 c | 5035.25 ± 14.13 d | 234.31 ± 0.58 b | 190.95 ± 0.54 a |
| Antioxidant Activity | |||||
| DPPH EC50 (mg/mg DPPH) | 0.15 ± 0.02 a | 0.62 ± 0.03 b | 1.17 ± 0.05 c | 1.49 ± 0.04 d | 0.15 ± 0.02 a |
| FRAP (μmol TE/g DM) | 761.27 ± 0.13 e | 646.86 ± 0.16 c | 629.61 ± 0.09 b | 671.25 ± 0.12 d | 498.34 ± 0.18 a |
Blueberries (BLUB), raspberries (RASB), blackberries (BLCB), pomegranates pomace (POME), beetroots (BEET), control chocolate, (CONT). Data are presented as mean ± SD of three replications. The values followed by the same lowercase letter (a–e) in the same row do not differ significantly according to Tukey’s HSD test at p < 0.05. nd—not detected.