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Does gamma-irradiation affect the quality of fresh-cut watercress?

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dc.contributor.authorPinela, José
dc.contributor.authorBarreira, João C.M.
dc.contributor.authorAntonio, Amilcar L.
dc.contributor.authorBarros, Lillian
dc.contributor.authorCabo Verde, Sandra
dc.contributor.authorCarvalho, Ana Maria
dc.contributor.authorOliveira, Beatriz
dc.contributor.authorFerreira, Isabel C.F.R.
dc.date.accessioned2015-06-26T09:20:02Z
dc.date.available2015-06-26T09:20:02Z
dc.date.issued2015
dc.description.abstractWatercress (Nasturtium officinale R. Br.) is a nutrient rich perennial plant of the Brassicaceae family highly appreciated in the Mediterranean cuisine. It is eaten raw in salads, soups and other recipes and used in folk medicine due to its medicinal and therapeutic properties [1,2]. However, it has a reduced shelf-life of approximately 7 days [3]. Since most conventional preservation treatments can't extend the shelf-life without compromising the quality and consumers are more aware about the limitations and side effects of the commonly used sanitizing treatments [4], irradiation emerged as a potential and safe alternative against these conventional postharvest treatments. In this study, the effect of different doses of gamma-irradiation on fresh-cut watercress quality was evaluated. Samples were collected in Bragança region (Northeast of Portugal), rinsed in tap water and packaged in sterilized bags. Packaged samples were exposed to 0 (control), 1, 2 and 5 kGy of γ-rays in a 60Co chamber and stored at 4 ºC for 7 days. Among the evaluated parameters, color was measured with a colorimeter, total soluble solids using a digital refractometer, and pH with a digital pH-meter. Macronutrients were determined using standard procedures, and hydrophilic (sugars, organic acids, phenolics and flavonoids) and lipophilic (fatty acids and tocopherols) compounds by chromatographic or spectrophotometric techniques. Furthermore, the bioactivity was evaluated in hydroalcoholic extracts through DPPH scavenging activity, reducing power, β-carotene bleaching inhibition and TBARS formation inhibition. Data were evaluated through Linear Discriminant Analysis (LDA) to verify if the differences induce by irradiation on the evaluated parameters could act as discriminant variables. Among the 58 studied variables, only 13 (including fructose, glucose, citric acid, some fatty acids such as linoleic and α-linolenic acids, β- and γ-tocopherols and β-carotene bleaching inhibition) were selected in the application of LDA, which is a strong indication of the similarity between the results obtained for the remaining 45 variables. Furthermore, some of the observed differences proved to be advantageous for the irradiated samples. Thus, this study demonstrated that, up to 5 kGy, gamma-irradiation did not affect the main quality parameters of fresh-cut watercress.por
dc.description.sponsorshipPRODER - Project AROMAP, for financial support of the work and FCT (Portugal) for financial support to CIMO (PEst-OE/AGR/UI0690/2011), REQUIMTE (PEst-C/EQB/LA0006/2011), J. Pinela (SFRH/BD/92994/2013), J.C.M. Barreira (SFRH/BPD/72802/2010) and L. Barros (research contract).por
dc.identifier.citationPinela, José; Barreira, João C.M.; Antonio, Amilcar L.; Barros, Lillian; Cabo Verde, Sandra; Carvalho, Ana M.; Oliveira, M. Beatriz P.P.; Ferreira, Isabel C.F.R. (2015). Does gamma-irradiation affect the quality of fresh-cut watercress?. In RAD - International Conference on Radiation Applications. Budva, Montenegro. ISBN 978-86-80300-00-9
dc.identifier.isbn978-86-80300-00-9
dc.identifier.urihttp://hdl.handle.net/10198/11910
dc.language.isoengpor
dc.peerreviewedyespor
dc.relationProject AROMAPpor
dc.relationStrategic Project - UI 690 - 2011-2012
dc.relationStrategic Project - LA 6 - 2011-2012
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.relation.publisherversionhttp://www.rad-conference.org/proceedings.phppor
dc.subjectGamma irradiationpor
dc.subjectWatercresspor
dc.subjectNasturtium officinale R. Br.por
dc.subjectAntioxidantspor
dc.subjectNutritional parameterspor
dc.titleDoes gamma-irradiation affect the quality of fresh-cut watercress?por
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleStrategic Project - UI 690 - 2011-2012
oaire.awardTitleStrategic Project - LA 6 - 2011-2012
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/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.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F92994%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F72802%2F2010/PT
oaire.citation.conferencePlaceBudva, Montenegropor
oaire.citation.endPage3por
oaire.citation.startPage3por
oaire.citation.titleRAD - International Conference on Radiation Applicationspor
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6820 - DCRRNI ID
person.familyNamePinela
person.familyNameBarreira
person.familyNameAntonio
person.familyNameBarros
person.familyNameCarvalho
person.familyNameFerreira
person.givenNameJosé
person.givenNameJoão C.M.
person.givenNameAmilcar L.
person.givenNameLillian
person.givenNameAna Maria
person.givenNameIsabel C.F.R.
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person.identifier.orcid0000-0002-9050-5189
person.identifier.orcid0000-0001-5508-5935
person.identifier.orcid0000-0003-4910-4882
person.identifier.ridB-4466-2014
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person.identifier.ridJ-1960-2014
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project.funder.identifierhttp://doi.org/10.13039/501100001871
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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
project.funder.nameFundação para a Ciência e a Tecnologia
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