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Physical hurdles to enhance watercress' quality and safety: Effects on chemical and bioactive parameters

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dc.contributor.authorPinela, José
dc.contributor.authorBarreira, João C.M.
dc.contributor.authorFernandes, Ângela
dc.contributor.authorCabo Verde, Sandra
dc.contributor.authorAntonio, Amilcar L.
dc.contributor.authorCarvalho, Ana Maria
dc.contributor.authorOliveira, Beatriz
dc.contributor.authorFerreira, Isabel C.F.R.
dc.date.accessioned2015-11-06T12:17:24Z
dc.date.available2015-11-06T12:17:24Z
dc.date.issued2015
dc.description.abstractThe hurdle concept provides a framework for combining a number of milder preservation factors (hurdles) in order to achieve an enhanced level of product safety and stability. For fresh vegetables such as watercress (Nasturtium officinale R. Br.), characterised by a reduced shelf-life, some of these hurdle have focused on the use of modified atmosphere packaging (MAP) combined with other physical or physicochemical factors (Alexandre et al., 2011; Silveira et al., 2014). Thus, in the present work, the combined effects of passive MAP, gamma irradiation and refrigerated storage on chemical and bioactive quality parameters of watercress were evaluated. Wild specimens were gathered in the Northeast region of Portugal, rinsed in tap water and a portion was immediately analysed (control). The remaining fresh material was packed under passive MAP, exposed to 1, 2 and 5 kGy of y-rays in a 6°Co chamber and stored at 4 oc for 7 days. Non-irradiated samples followed all the assays. Sugars, fatty acids, tocopherols and organic acids were analysed by chromatographic techniques. Phenolics and flavonoids were determined by spectrophotometer methods. The antioxidant activity was evaluated in hydroalcoholic extracts using four distinct in vitro assays. In general, the sucrose and organic acid levels increased in stored samples. The 5 kGy dose protected MUF A (monounsaturated fatty acids), while the 2 kGy dose was effective in favouring PUF A (polyunsaturated fatty acids). In either case, the hurdle treatment allowed obtaining watercress samples with a healthier fatty acids profile, as also verified in the increased PUF A/SF A (saturated fatty acids) ratio. Concerning tocopherols, the most relevant result was the effect achieved with the 5 kGy dose, particularly owing the contributions of a- (the major isoform) and ytocopherols. The same dose also allowed the best results in maintaining the antioxidant activity, as well as in phenolics and flavonoids. Through Linear Discriminant Analysis it was concluded that 2 kGy is the preferable hurdle to maintain the original characteristics of watercress. Nevertheless, the 5 kGy dose should also be considered when aiming to obtain a final product with healthier properties. Thus, this study highlighted the suitability of the applied hurdles to enhance watercress functionality and shelf-life.pt_PT
dc.identifier.citationPinela, José; Barreira, João C.M.; Fernandes, Ângela; Cabo Verde, Sandra; Antonio, Amilcar L.; Carvalho, Ana Maria; Oliveira, M.B.P.P.; Ferreira, Isabel C.F.R. (2015). Physical hurdles to enhance watercress' quality and safety: Effects on chemical and bioactive parameters. In 5th MoniQA International Conference 2015. Porto. ISBN 978-3-9504109-0-7pt_PT
dc.identifier.isbn978-3-9504109-0-7
dc.identifier.urihttp://hdl.handle.net/10198/12299
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationPRODER 53514 – AROMAPpt_PT
dc.relationApplication of Ionizing Radiation for a Sustainable Environment
dc.relationRECOVERY OF THE SUSTAINABLE USE OF TRADITIONAL FOODS THROUGH EMERGING PRESERVATION TECHNOLOGIES
dc.relationBIOACTIVE PROPERTIES & CYTOPROTECTIVE POTENTIAL OF NATURAL EXTRACTS/INDIVIDUAL COMPOUNDS: APPLICATION OF SINGLE CELL GEL ELECTROPHORESIS AND OTHER BIOCHEMICAL, CHEMICAL AND ELECTROCHEMICAL ASSAYS
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectWatercresspt_PT
dc.subjectHurdle technologypt_PT
dc.subjectPassive MAPpt_PT
dc.subjectGamma irradiationpt_PT
dc.subjectChemical compositionpt_PT
dc.subjectBioactivitypt_PT
dc.titlePhysical hurdles to enhance watercress' quality and safety: Effects on chemical and bioactive parameterspt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleApplication of Ionizing Radiation for a Sustainable Environment
oaire.awardTitleRECOVERY OF THE SUSTAINABLE USE OF TRADITIONAL FOODS THROUGH EMERGING PRESERVATION TECHNOLOGIES
oaire.awardTitleBIOACTIVE PROPERTIES & CYTOPROTECTIVE POTENTIAL OF NATURAL EXTRACTS/INDIVIDUAL COMPOUNDS: APPLICATION OF SINGLE CELL GEL ELECTROPHORESIS AND OTHER BIOCHEMICAL, CHEMICAL AND ELECTROCHEMICAL ASSAYS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/PEst-OE%2FAGR%2FUI0690%2F2014/PT
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oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/RECI%2FAAG-TEC%2F0400%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F92994%2F2013/PT
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oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F76019%2F2011/PT
oaire.citation.title5th MoniQA International Conference 2015, Food and Helath- Risks and beneffitspt_PT
oaire.fundingStream5876
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
oaire.fundingStreamSFRH
person.familyNamePinela
person.familyNameBarreira
person.familyNameFernandes
person.familyNameAntonio
person.familyNameCarvalho
person.familyNameFerreira
person.givenNameJosé
person.givenNameJoão C.M.
person.givenNameÂngela
person.givenNameAmilcar L.
person.givenNameAna Maria
person.givenNameIsabel C.F.R.
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person.identifier.orcid0000-0001-8271-9964
person.identifier.orcid0000-0001-5508-5935
person.identifier.orcid0000-0003-4910-4882
person.identifier.ridB-4466-2014
person.identifier.ridD-8269-2013
person.identifier.ridJ-1960-2014
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person.identifier.scopus-author-id54392272800
person.identifier.scopus-author-id54895546900
person.identifier.scopus-author-id44560921900
person.identifier.scopus-author-id20336503900
person.identifier.scopus-author-id36868826600
project.funder.identifierhttp://doi.org/10.13039/501100001871
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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
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
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rcaap.rightsopenAccesspt_PT
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