Influence of drying conditions on the rheological properties of prunes
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Data
2002-01-01
Autores
Gabas, A. L.
Menegalli, F. C.
Ferrari, F.
Telis-Romero, J.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Marcel Dekker Inc
Resumo
Rheological properties of rehydrated prunes were obtained applying compression-relaxation tests by using a Texture Analyzer TAXT2i. A mathematical development was adopted to determine the stress and area, along the deformation. Experimental data of stress versus time was fitted by using three different rheological models: generalized Maxwell, Normand & Peleg and Maxwell. Results showed that generalized Maxwell model can be used to describe the viscoelastic behavior of the samples. The rheological parameters obtained indicated that prunes exhibited elastic behavior more pronounced at low moisture content and drying air temperature. At high moisture content and temperature the sample became a more viscous and less rigid.
Descrição
Palavras-chave
fruit, relaxation behavior, rheological model, viscoelastic properties
Como citar
Drying Technology. New York: Marcel Dekker Inc., v. 20, n. 7, p. 1485-1502, 2002.