Table 1.
Proximate composition, water activity (aw) and the degree of hydrolysis (DH) of spray-dried whey protein hydrolysates (WPHs) generated with Alcalase® (Alc) and Prolyve® (Plv) under pH-stat (ST7) and free-fall (FF9) conditions compared to whey protein concentrate (WPC80).
| WPHs | Protein/Protein Equivalent (g/100 g dw) |
Ash (g/100 g dw) |
Moisture (g/100 g dw) |
aw at 20 °C | DH (%) |
|---|---|---|---|---|---|
| Alc-ST7 | 77.09 ± 0.45 a | 6.18 ± 0.06 c | 5.39 ± 0.12 a | 0.335 ± 0.020 a | 12.88 ± 0.01 b |
| Alc-FF9 | 79.24 ± 1.12 b | 5.31 ± 0.35 b | 6.25 ± 0.52 a | 0.365 ± 0.005 ab | 9.52 ± 0.39 a |
| Plv-ST7 | 78.21 ± 0.30 ab | 5.41 ± 0.09 b | 5.57 ± 0.44 a | 0.405 ± 0.009 cd | 13.24 ± 0.45 b |
| Plv-FF9 | 79.34 ± 0.48 b | 5.68 ± 0.04 bc | 5.77 ± 0.26 a | 0.432 ± 0.010 d | 12.45 ± 1.27 ab |
| WPC80 | 81.82 ± 0.10 c | 2.88 ± 0.14 a | 4.19 ± 1.13 a | 0.388 ± 0.002 bc | 0 |
Values reported as mean ± SD (n = 3). Different letters indicate a significant difference between samples (p < 0.05; One-way ANOVA). dw: dry weight; aw: water activity; DH: degree of hydrolysis.