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Effect of pretreatments on quality parameters and nutritional compounds of dried Galega kale (Brassica Oleracea L. Var. Acephala)

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dc.contributor.authorAraújo, Ana C.
dc.contributor.authorOliveira, Sara M.
dc.contributor.authorRamos, Inês N.
dc.contributor.authorBrandão, Teresa R. S.
dc.contributor.authorSilva, Cristina L. M.
dc.date.accessioned2016-04-20T18:37:42Z
dc.date.available2016-04-20T18:37:42Z
dc.date.issued2015
dc.description.abstractGalega kale (Brassica Oleracea L. var. Acephala) is a vegetable quite common in several countries. It presents high moisture content at harvest, so it can only be preserved for a few days under room temperature. Therefore, drying processes can be employed to increase its shelf-life. However, drying exposes the product to high temperatures that can result in some losses of flavour, texture, colour and nutrients. To minimize these detrimental effects, several pretreatments may be used as possible strategies to improve nutritional attributes and sensory properties, after dehydration and during long-term storage. The objective of this work was to evaluate the effect of six pretreatments on quality and nutritional contents of Galega kale submitted to convective air drying. Water and steam blanching, simple or combined with chemical treatments, were applied to kale samples before convective drying. When compared to the absence of pretreatment, steam blanching provided improvements on retention percentages of 7.3 and 13.6% for vitamin C and total antioxidant capacity, respectively. Regarding pigments, steam blanching enabled higher retention of total chlorophylls. Total phenolic content was the only nutritional parameter in which steam blanching preceded by chemical treatment with metabisulfite provided better results than isolated steam blanching. Steam blanching for 1 min, without the need of previous chemical treatment, applied to kale samples before drying, demonstrated to be a valuable approach to reduce deterioration of the majority of the parameters in study, and also improved significantly the appearance of Galega kale after the drying process.pt_PT
dc.identifier.citationARAÚJO, Ana C.; OLIVEIRA, Sara M.; RAMOS, Inês N.; BRANDÃO, Teresa R. S.; SILVA, Cristina L. M - Effect of pretreatments on quality parameters and nutritional compounds of dried Galega kale (Brassica Oleracea L. Var. Acephala). In 29th EFFoST Conference - Food Science Research and Innovation: Delivering Sustainable Solutions to the Global Economy and Society, Athens, Greece, 10-12 November 2015. – In DERMESONLOUOGLOU, Efimia …[et al.] (ed.) - Proceedings 29th EFFoST Conference. Athens: NTUA, School of Chemical Engineering, 2015. ISBN 978-618-82196-1-8. Vol. 2, p. 840-845pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.14/19850
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectGalega kalept_PT
dc.subjectDryingpt_PT
dc.subjectPretreatmentspt_PT
dc.subjectNutrientspt_PT
dc.subjectQualitypt_PT
dc.titleEffect of pretreatments on quality parameters and nutritional compounds of dried Galega kale (Brassica Oleracea L. Var. Acephala)pt_PT
dc.typeconference object
dspace.entity.typePublication
person.familyNameOliveira
person.familyNameRamos
person.familyNameBrandão
person.familyNameSilva
person.givenNameSara
person.givenNameInês
person.givenNameTeresa
person.givenNameCristina
person.identifierJ-9418-2012
person.identifier1473674
person.identifier.ciencia-id7913-12FC-8DE9
person.identifier.ciencia-id7B19-E23B-BB31
person.identifier.ciencia-id6611-634A-132C
person.identifier.orcid0000-0003-0649-2694
person.identifier.orcid0000-0002-8390-0690
person.identifier.orcid0000-0002-8857-6471
person.identifier.orcid0000-0002-0495-3955
person.identifier.ridM-5180-2013
person.identifier.ridI-9890-2017
person.identifier.ridJ-9418-2012
person.identifier.ridA-3568-2013
person.identifier.scopus-author-id16022986400
person.identifier.scopus-author-id7006766707
person.identifier.scopus-author-id6602174128
person.identifier.scopus-author-id7201387397
rcaap.rightsrestrictedAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication6663c3d3-4fe7-4fe6-a175-8f9e1f76d978
relation.isAuthorOfPublication94376d98-c135-470b-b03f-c8839cf2e76c
relation.isAuthorOfPublicationebf7ead0-3772-4fd6-988c-f6b8722de84e
relation.isAuthorOfPublication4e2903de-0679-4cb1-981e-10de14c0c995
relation.isAuthorOfPublication.latestForDiscovery4e2903de-0679-4cb1-981e-10de14c0c995

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