Abstract
The aim of this study was to evaluate the effect of microwave precooking on mass transfer during deep-fat frying of ostrich meat plates. The influence of microwave power level, frying temperature, and time on mass transfer was determined. Among all treatments, the plates being precooked at 5.23 W/g of microwave power and then deep-fat fried at 135 °C had the minimum fat content. The effective moisture diffusivity ranged between 1.47 × 10−8 and 4.17 × 10−8 m2/s. Fat transfer rate constant was in the range of 0.024 and 19.708 s−1. The activation energy obtained from Arrhenius plot for the effective moisture diffusivity ranged between 38.84 and 51.07 kJ/mol.
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Abbreviations
- M :
-
Moisture content (g/g, db)
- M e :
-
Equilibrium moisture content (g/g, db)
- M 0 :
-
Initial moisture content (g/g, db)
- M r :
-
Moisture ratio, dimensionless
- ML:
-
Moisture loss (g/g)
- L :
-
Half thickness of the sample (m)
- k :
-
Rate constant (s−1)
- D eff :
-
Effective diffusivity (m2/s)
- D 0 :
-
Effective diffusivity at high liquid concentration (m2/s)
- t :
-
Time (s)
- FC:
-
Fat content (g/g)
- FU:
-
Fat uptake (g/g)
- C 0 :
-
Equilibrium fat content (g/g)
- R :
-
Universal gas constant (0.0083143 kJ/mol K)
- E a :
-
Activation energy (kJ/mol)
- T :
-
Absolute temperature (K)
- π :
-
Pi (22/7)
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Acknowledgments
The authors are thankful to the Etemadi Trading Group for providing some facilities for this research project. We also acknowledge the help given by Elham Ranjbar and Saeideh Madayeni during the experiments.
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Amiryousefi, M.R., Mohebbi, M. & Khodaiyan, F. Kinetics of Mass Transfer in Microwave Precooked and Deep-Fat Fried Ostrich Meat Plates. Food Bioprocess Technol 5, 939–946 (2012). https://doi.org/10.1007/s11947-010-0373-x
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DOI: https://doi.org/10.1007/s11947-010-0373-x