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Drying Technology
An International Journal
Volume 24, 2006 - Issue 4: Special Issue on Drying R & D in Brazil, Guest Editors: Maria Silva and Sandra Rocha
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Original Articles

Freeze-Drying Characteristics of Tropical Fruits

Luanda G. Marques Department of Chemical Engineering, Federal University of São Carlos Drying Center of Pastes, Suspensions and Seeds, São Carlos-SP, Brazil
,
Ana M. Silveira Department of Chemical Engineering, Federal University of São Carlos Drying Center of Pastes, Suspensions and Seeds, São Carlos-SP, Brazil
&
José T. Freire Department of Chemical Engineering, Federal University of São Carlos Drying Center of Pastes, Suspensions and Seeds, São Carlos-SP, BrazilCorrespondence[email protected]
Pages 457-463 | Published online: 06 Feb 2007
 
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ABSTRACT

The objective of this work was to experimentally determine physical properties such as apparent densities, real densities, and porosity of freeze-dried tropical fruits pulps such as pineapple, Barbados cherry, guava, papaya, and mango, and to carry out nutritional analysis of vitamin C, calcium, and phosphorus in the freeze-dried and in natura pulps. The freeze-dried pulps presented low apparent density and elevated values of true density and porosity. Based on the nutritional analysis performed in the in natura and freeze-dried pulps the preservation of product quality was verified.

ACKNOWLEDGMENTS

The authors thank the Brazilian funding agencies FAPESP/Proc.: 04/04815-0 and CNPq/PRONEX for their financial support.

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