Table 6.
DPPH and ABTS radical scavenging activities, reducing power (RP), Cu2+ and Fe2+ chelating activities of salmon heads hydrolysates (0.1 mg/mL) prepared by Subcritical Water Hydrolysis and by Alcalase hydrolysis.
| Antioxidant Activity (%) | Chelating Activity (%) | ||||
|---|---|---|---|---|---|
| DPPH | ABTS | RP | Cu2+ | Fe2+ | |
| SWH1 (200 °C, 100 bar, 30 min) |
17.9 ± 0.53 c | 2.50 ± 0.17 a,b | 0.061 ± 0.006 a | 9.7 ± 0.4 a | 1.7 ± 0.40 a |
| SWH2 (200 °C, 100 bar, 10 min) |
15.2 ± 0.83 c | 2.40 ± 0.13 a,b | 0.058 ± 0.000 a | 12.8 ± 2.7 a,b | 0.37 ± 0.08 a |
| SWH3 (200 °C, 50 bar, 30 min) |
9.6 ± 0.09 b | 1.89 ± 0.63 a | 0.061 ± 0.000 a | 12.0 ± 1.7 a,b | 1.4 ± 0.40 a |
| SWH4 (250 °C, 100 bar, 30 min) |
22.9 ± 0.28 d | 3.10 ± 0.07 b | 0.064 ± 0.002 a | 11.2 ± 1.1 a | 13.0 ± 0.8 d |
| SWH5 (250 °C, 100 bar, 10 min) |
18.8 ± 0.80 c,d | 2.78 ± 0.17 a,b | 0.054 ± 0.009 a | 13.0 ± 0.4 a,b | 6.5 ± 0.8 c |
| SWH6 (250 °C, 0 bar, 30 min) |
14.9 ± 2.2 c | 2.87 ± 0.01 a,b | 0.058 ± 0.001 a | 16.7 ± 1.7 c | 2.5 ± 0.10 a,b |
| HPS (60 °C, pH 8.5, 3 h, 1% Alcalase) |
0.83 ± 0.08 a | 5.45 ± 0.48 c | 0.051 ± 0.002 a | nd | 3.1 ± 0.62 a,b |
nd—not detected at 0.1 mg/mL hydrolysate solution; Different letters in each column indicate significant differences (p < 0.05) between FPH.