Table 4.
Antioxidant/biological properties of date seed extracts obtained by using different extraction methods.
| Extraction Methods | Extract Samples | Antioxidant (µg AAE/mL) |
DPPH IC50 (µg/mL) | FRAP (mmolTE/100 g) | ABTS (μmol TE/100 g) |
|---|---|---|---|---|---|
| Soxhlet | Sukari seed | 11.81 ± 0.70 g | 337.79 ± 4.26 b | 1.27 ± 0.03 j | 271.59 ± 3.21 i |
| Ambara seed | 9.29 ± 0.25 h | 317.45 ± 1.46 c | 0.97 ± 0.03 k | 271.96 ± 12.67 i | |
| Majdool seed | 21.12 ± 0.50 c | 297.71 ± 3.55 d | 1.34 ± 0.02 i | 303.60 ± 4.88 h | |
| Sagai seed | 16.03 ± 0.45 e | 353.83 ± 1.92 a | 1.39 ± 0.02 hi | 306.29 ± 4.67 h | |
| SubCO2 | Sukari seed | 16.14 ± 0.91 e | 162.15 ± 1.97 i | 2.10 ± 0.05 a | 628.45 ± 9.97 c |
| Ambara seed | 13.52 ± 1.35 f | 156.27 ± 1.68 j | 1.58 ± 0.04 f | 648.33 ± 10.08 b | |
| Majdool seed | 23.83 ± 1.51 a | 109.69 ± 1.47 l | 1.99 ± 0.05 b | 717.45 ± 10.62 a | |
| Sagai seed | 18.79 ± 1.40 d | 121.42 ± 1.90 k | 1.91 ± 0.02 c | 545.70 ± 10.87 d | |
| SFE | Sukari seed | 13.87 ± 0.55 f | 228.76 ± 4.67 e | 1.55 ± 0.02 g | 375.74 ± 4.75 g |
| Ambara seed | 13.42 ± 1.01 f | 207.76 ± 1.77 f | 1.43 ± 0.02 h | 410.71 ± 4.91 f | |
| Majdool seed | 22.62 ± 0.71 bc | 190.04 ± 0.21 h | 1.68 ± 0.03 e | 424.84 ± 13.15 ef | |
| Sagai seed | 18.12 ± 1.21 d | 198.39 ± 1.61 g | 1.85 ± 0.03 d | 443.60 ± 10.25 e |
Data is represented by means ± standard deviations. SubCO2: Subcritical CO2 extraction; SFE: supercritical fluid extraction; Antioxidant: antioxidant activity using phosphomolybdenum complex; DPPH: DPPH free radical scavenging activity; FRAP: ferric reducing antioxidant power and ABTS: ABTS cation radical-scavenging. Means with small letter superscripts are significantly different (p < 0.05) within columns.