کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
225882 | 464515 | 2006 | 7 صفحه PDF | دانلود رایگان |
Application of the Peleg model was investigated for predicting moisture loss and salt gain by sardine sheets during osmotic dehydration using brine at different concentrations (0.15–0.27 gNaCl/g) and temperatures (32–38 °C). The high regression coefficients (R2 > 0.92) indicated the acceptability of Peleg model for predicting both moisture loss and salt gain. The Peleg rate content varied from 0.260 to 0.884 h (g/g db)−1 and from 0.897 to 2.770 h (g/g db)−1 for moisture loss and salt gain, respectively. The Peleg capacity content varied from 0.925 to 1.740 (g/g db)−1 and from 3.210 to 5.060 (g/g db)−1 for moisture loss and salt gain, respectively. The Peleg rate constants for moisture loss and salt gain as a function of temperature all followed an Arrhenius relationship, regardless of concentration. Rate constant for salt gain was found to be more temperature sensitive (Ea = 48.92–97.45 kJ/mol) than rate constant for moisture loss (Ea = 16.58–81.74 kJ/mol). The equilibrium moisture (Xw) and salt (Xs) contents were estimated using Peleg model. At constant temperature, the equilibrium moisture content decreased (p < 0.05) with increasing brine concentration while equilibrium salt content increased (p < 0.05). Effect of temperature on equilibrium moisture content is mixed and depends on brine concentration. At constant brine concentration the equilibrium salt content increased (p < 0.05) with increasing temperature.
Journal: Journal of Food Engineering - Volume 75, Issue 4, August 2006, Pages 535–541