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Biochemical and colour changes of watercress (Nasturtium officinale R. Br.) during freezing and frozen storage

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dc.contributor.authorGonçalves, E.M.
dc.contributor.authorCruz, R.M.S.
dc.contributor.authorAbreu, M.
dc.contributor.authorBrandão, Teresa R. S.
dc.contributor.authorSilva, Cristina L.M.
dc.date.accessioned2010-10-07T13:45:20Z
dc.date.available2010-10-07T13:45:20Z
dc.date.issued2009
dc.description.abstractThe effects of water blanching, freezing, and frozen storage during 400 days at three different temperatures ( 7, 15 and 30 C), on watercress (Nasturtium officinale R. Br.) colour Hunter Lab parameters,chlorophyll degradation, vitamin C content loss and peroxidase (POD) activity were evaluated. The blanching induced significant changes on colour values and chlorophylls and vitamin C contents. POD activity was reduced 85% from its initial value. Freezing did not affect chlorophylls and vitamin C levels, however, promoted significant differences in colour values and POD residual activity. During frozen storage, ascorbic acid (AA) and POD activity Degradations followed first-order kinetics, and colour parameters (LH aH bH, aH/bH, LH aH/bH, LH/aH bH and hue (h0 H)) were successfully described by zero-order kinetics. The storage temperature effect was successfully described by the Arrhenius law. Chlorophylls and dehydroascorbic acid (DHAA) contents were kept constant during frozen storage.por
dc.identifier.citation"Journal of Food Engineering". ISSN 0260-8774. 93: 1 (2009) 32–39por
dc.identifier.doi10.1016/j.jfoodeng.2008.12.027
dc.identifier.urihttp://hdl.handle.net/10400.14/2678
dc.language.isoengpor
dc.publisherElsevierpor
dc.subjectFrozen watercresspor
dc.subjectQuality parameterspor
dc.subjectPeroxidase activitypor
dc.subjectKineticspor
dc.titleBiochemical and colour changes of watercress (Nasturtium officinale R. Br.) during freezing and frozen storagepor
dc.typejournal article
dspace.entity.typePublication
person.familyNameGonçalves
person.familyNameCruz
person.familyNameAbreu
person.familyNameBrandão
person.familyNameSilva
person.givenNameElsa Margarida
person.givenNameRui
person.givenNameMarta
person.givenNameTeresa
person.givenNameCristina
person.identifier1123160
person.identifierJ-9418-2012
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person.identifier.ciencia-id6611-634A-132C
person.identifier.orcid0000-0002-5814-0490
person.identifier.orcid0000-0002-0839-1881
person.identifier.orcid0000-0002-0245-7122
person.identifier.orcid0000-0002-8857-6471
person.identifier.orcid0000-0002-0495-3955
person.identifier.ridN-4198-2013
person.identifier.ridJ-9418-2012
person.identifier.ridA-3568-2013
person.identifier.scopus-author-id7004990784
person.identifier.scopus-author-id8522888800
person.identifier.scopus-author-id7102768632
person.identifier.scopus-author-id6602174128
person.identifier.scopus-author-id7201387397
rcaap.rightsopenAccesspor
rcaap.typearticlepor
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