Rehydration and shrinkage behaviour of dried pineapple

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dc.contributor.authorNicoleti, J. F.
dc.contributor.authorTelis-Romero, J.
dc.contributor.authorTelis, VRN
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:21:26Z
dc.date.available2014-05-20T15:21:26Z
dc.date.issued2001-01-01
dc.description.abstractThe shrinking behavior, apparent densities and rehydration indexes of fresh and osmotically pre-treated pineapple slices during air-drying were obtained. The air drying velocity varied from 1.5 to 2.5 m/s and the air temperature from 40 to 70 degreesC. By means of automatic control, it was possible to obtain drying curves under conditions of constant product temperature. Volumetric shrinkage of fresh samples was temperature independent for drying at high air velocities but, at lower velocities, increased with decreasing drying temperature. Osmotically pre-treating the material resulted in reduced shrinkage, as well as drying with product temperature controlled, due to lower drying times needed that led to shorter high temperature exposition. Moisture dependence of apparent density was highly non-linear and could be fitted by an empirical model. Fresh sample rehydration indexes were higher than osmosed ones and increased with increasing temperature, except for pre-treated samples dried at 70 degreesC, probably due to superficial sugar caramelization, which reduced surface water permeability.en
dc.description.affiliationUniv Estadual Paulista, Dept Engn & Tecnol ALimentos, BR-15054000 Sao Jose do Rio Preto, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Engn & Tecnol ALimentos, BR-15054000 Sao Jose do Rio Preto, SP, Brazil
dc.format.extent253-262
dc.identifier.citationProceedings of the Second Inter-american Drying Conference. Veracruz 91860: Isnt Tecnologico Veracruz, p. 253-262, 2001.
dc.identifier.lattes9457081088108168
dc.identifier.urihttp://hdl.handle.net/11449/32582
dc.identifier.wosWOS:000172809000020
dc.language.isoeng
dc.publisherIsnt Tecnologico Veracruz
dc.relation.ispartofProceedings of the Second Inter-american Drying Conference
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectvolumetric shrinkagept
dc.subjectapparent densitypt
dc.subjectosmotic dryingpt
dc.subjectair-dryingpt
dc.titleRehydration and shrinkage behaviour of dried pineappleen
dc.typeTrabalho apresentado em evento
dcterms.rightsHolderIsnt Tecnologico Veracruz
unesp.author.lattes9457081088108168
unesp.author.orcid0000-0002-2553-4629[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt

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Artigos - Engenharia e Tecnologia de Alimentos - IBILCE