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Osmo-dehydration of fruits

Osmo-dehydration of fruits

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CONCLUSION<br />

The osmo-<strong>dehydration</strong> <strong>of</strong> a fruit pulp can be described with a thermodynamic model that takes into account<br />

the heterogeneity <strong>of</strong> the system. The experimental data are those relevant to the isothermal desorption trends<br />

across the swept RH range for the original (peeled) and partially osmo-dehydrated fruit pulp, and the<br />

hypertonic sugar syrup used. These trend allow evaluation <strong>of</strong> the mass <strong>of</strong> intra- and extra-cellular phases <strong>of</strong><br />

the system at any given RH. The mass change <strong>of</strong> the intra- cellular aqueous phase allows a rough evaluation<br />

<strong>of</strong> the shrinkage that the fruit cells undergo and the correlation between shrinkage and RH, which may be<br />

applied to any kind <strong>of</strong> <strong>dehydration</strong> treatment, provided it does not affect the cell walls.<br />

REFERENCES<br />

[1] Torreggiani D. and Bertolo G. J. Food Eng. 2001; 49: 247-.<br />

[2] Lewicki PP., Le H. Vu and Pomaranska-Laznka W. J. Food Eng. 2002 ; 54: 141.<br />

[3] N. M. Panagiotou, V. T. Karathanos, Z.B. Maroulis. Int. J. Food Sci. Technol. 1998, 33, 267.<br />

[4] . L. Seguı´, P.J. Fito, A. Albors, P. Fito, J. Food Eng. 2006, 77, 179.<br />

[5] Hills BP. Magnetic Resonance Imaging in Food Science, John Wiley &Sons, Inc. Publ. New York; 1998<br />

[6] Schiraldi, A. and Fessas, D. , J. Therm. Anal. Cal. 2003, 71, 221.<br />

[7] Fessas, D. and Schiraldi, A. Food Chemistry 2004,90, 61.<br />

[8] Pani P., Schiraldi A., Signorelli M. and Fessas D., Food Biophysics, 2010,5 (3) 177.

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