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Quantification of microstructural changes during first stage air drying of grape tissue

2004Journal article Open access
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dc.contributor.authorRamos, Inês N.
dc.contributor.authorSilva, Cristina L.M.
dc.contributor.authorSereno, Alberto M.
dc.contributor.authorAguilera, José M.
dc.date.accessioned2010-11-19T15:27:09Z
dc.date.available2010-11-19T15:27:09Z
dc.date.issued2004
dc.description.abstractMicrostructural changes in cells of Ruby grape (Vitis vinifera) quarters were monitored during first stage of convective air drying, under a stereo-microscope. A gradual overall shrinkage of grape cells was observed during the process. The cellular parameters: area, perimeter, major and minor axis length, Feret diameter, elongation, roundness and compactness, were quantified by image analysis. It was verified that cell dimensions suffered modifications during drying, but their shape remained unchanged. These microstructural changes showed a smooth exponential decrease with time, and a first-order kinetic model was satisfactorily fitted to the data. Temperature increased the rate of cellular shrinkage and this effect followed an Arrhenius type behaviour. Increasing temperature from 20 to 60 C resulted in a 350% increase of the area change rate. For the parameters related to cellular dimensions, the magnitude of the values were 10 3 min 1 for the rate of change at 40 C and 3 kJ/mol for the activation energypor
dc.identifier.citationRAMOS, Inês N...[et al.] - Quantification of microstructural changes during first stage air drying of grape tissue. Journal of Food Engineering. ISSN 0260-8774. Vol. 62, n.º 2 (2004), p. 159-164por
dc.identifier.urihttp://hdl.handle.net/10400.14/3522
dc.language.isoengpor
dc.publisherElsevierpor
dc.subjectMicrostructurepor
dc.subjectShrinkagepor
dc.subjectKineticspor
dc.subjectModellingpor
dc.subjectDryingpor
dc.subjectGrapespor
dc.subjectStereo-microscopypor
dc.titleQuantification of microstructural changes during first stage air drying of grape tissuepor
dc.typejournal article
dspace.entity.typePublication
person.familyNameRamos
person.familyNameSilva
person.givenNameInês
person.givenNameCristina
person.identifier1473674
person.identifier.ciencia-id7913-12FC-8DE9
person.identifier.ciencia-id6611-634A-132C
person.identifier.orcid0000-0002-8390-0690
person.identifier.orcid0000-0002-0495-3955
person.identifier.ridI-9890-2017
person.identifier.ridA-3568-2013
person.identifier.scopus-author-id7006766707
person.identifier.scopus-author-id7201387397
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication94376d98-c135-470b-b03f-c8839cf2e76c
relation.isAuthorOfPublication4e2903de-0679-4cb1-981e-10de14c0c995
relation.isAuthorOfPublication.latestForDiscovery4e2903de-0679-4cb1-981e-10de14c0c995

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