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Shell's influence on drying kinetics, color and volumetric shrinkage of Castanea sativa Mill. fruits

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dc.contributor.authorDelgado, Teresa
dc.contributor.authorPereira, J.A.
dc.contributor.authorBaptista, Paula
dc.contributor.authorCasal, Susana
dc.contributor.authorRamalhosa, Elsa
dc.date.accessioned2015-10-05T14:53:59Z
dc.date.available2015-10-05T14:53:59Z
dc.date.issued2014
dc.description.abstractShell's influence on the drying behavior of two European chestnut (Castanea sativa mill.) varieties, Longal and Judia, was investigated in the present work. For this purpose, chestnuts of both varieties were dried in a hot air convection oven at 50.0 +/- 2.0 degrees C and air velocity of 1.0 +/- 0.1 m/s. The fruits were dried with and without outer shell, the axial dimensions, volumetric shrinkage and color being determined. Furthermore, the drying data was complemented for the first time with microscopic analyses of the shells. Longal and Judia drying behaviors were similar (moisture ratios less than 0.20 in 35 to 45 h), despite the microscopic differences in outer shell thickness (Judia: 556 +/- 43 mu m and Longal: 328 +/- 66 mu m) and cell format (smaller cells-Judia). After determining the suitability of several drying models, good results were obtained with the Page (Judia), and Two-term exponential and Modified Page models (Longal). Concerning fruit color, a slight decrease in fruit brightness and an increase on fruit yellowness were detected along drying for both varieties. Small volumetric shrinkage was observed (10-24%). From these results, both varieties seemed to be adequate to be used industrially to produce dried chestnut based products, showing similar drying behaviors. Regarding the influence of the outer shell on the drying process, it had a small impact on water removal. So, chestnuts can be dried with the outer shell, leading to a less expensive and non-time-consuming process because it is not necessary to peel the fruits before drying.pt_PT
dc.description.sponsorshipTeresa Delgado acknowledges the Fundação para a Ciência e Tecnologia (FCT) for the financial support through the PhD grant— SFRH/BD/82285/2011, CIMO through the Project PEst-OE/AGR/UI0690/ 2011 and REQUIMTE through the Project PEst-C/EQB/LA0006/2011.pt_PT
dc.identifier.citationDelgado, Teresa; Pereira, J.A.; Baptista, Paula; Casal, Susana; Ramalhosa, Elsa (2014). Shell's influence on drying kinetics, color and volumetric shrinkage of Castanea sativa Mill. Fruits. Food Research International. ISSN 0963-9969. 55, p. 426-435pt_PT
dc.identifier.doi10.1016/j.foodres.2013.11.043
dc.identifier.isbn0963-9969
dc.identifier.urihttp://hdl.handle.net/10198/12127
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationStrategic Project - UI 690 - 2011-2012
dc.relationStrategic Project - LA 6 - 2011-2012
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectChestnut fruits
dc.subjectVarieties' behavior
dc.subjectDrying
dc.subjectShell's influence
dc.subjectMathematical models
dc.titleShell's influence on drying kinetics, color and volumetric shrinkage of Castanea sativa Mill. fruitspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleStrategic Project - UI 690 - 2011-2012
oaire.awardTitleStrategic Project - LA 6 - 2011-2012
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F82285%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/PEst-OE%2FAGR%2FUI0690%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6820 - DCRRNI ID/PEst-C%2FEQB%2FLA0006%2F2011/PT
oaire.citation.endPage435pt_PT
oaire.citation.startPage426pt_PT
oaire.citation.volume55pt_PT
oaire.fundingStreamSFRH
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6820 - DCRRNI ID
person.familyNamePereira
person.familyNameBaptista
person.familyNameRamalhosa
person.givenNameJosé Alberto
person.givenNamePaula
person.givenNameElsa
person.identifier.ciencia-id611F-80B2-A7C1
person.identifier.ciencia-id7D11-FE1E-CD0F
person.identifier.ciencia-id1A1D-FC05-A05D
person.identifier.orcid0000-0002-2260-0600
person.identifier.orcid0000-0001-6331-3731
person.identifier.orcid0000-0003-2503-9705
person.identifier.ridL-6798-2014
person.identifier.scopus-author-id57204366348
person.identifier.scopus-author-id14051688000
person.identifier.scopus-author-id6602978189
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication7932162e-a2da-4913-b00d-17babbe51857
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