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Microwave-assisted extraction of phenolic compounds from Morus nigra leaves: optimization and characterization of the antioxidant activity and phenolic composition

2018-02Journal article Open access
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dc.contributor.authorRadojković, Marija
dc.contributor.authorMoreira, Manuela M.
dc.contributor.authorSoares, Cristina
dc.contributor.authorBarroso, M. Fátima
dc.contributor.authorCvetanović, Aleksandra
dc.contributor.authorŠvarc-Gajić, Jaroslava
dc.contributor.authorMorais, Simone
dc.contributor.authorDelerue-Matos, Cristina
dc.date.accessioned2020-01-23T15:23:25Z
dc.date.available2020-01-23T15:23:25Z
dc.date.issued2018-02
dc.description.abstractBACKGROUND Morus nigra (mulberry) fruit has been reported as a source of bioactive compounds, although information about their leaves is very limited. Usually, they are considered wastes and have been traditionally used only for tea preparation. The main objective of this work was to explore the valorization of mulberry leaves by polyphenols microwave‐assisted extraction (MAE) and characterization of their antioxidant activity and phenolic composition. A 23 factorial design combined with response surface methodology were applied to characterize the effect of main microwave parameters on total phenolic content (TPC). RESULTS The optimized MAE conditions were 20 mL of ethanol:water (1:1; v/v), 120 °C, 28 min, 0.414 g and medium stirring speed. Under these conditions, TPC was 19.7 ± 2.0 mg gallic acid equivalents (GAE) g‐1 dry plant (DP), and antioxidant activity was 15.3 ± 1.0 mg ascorbic acid (AA) g‐1 DP (ferric reduction activity power –FRAP– assay), 18.6 ± 1.3 mg Trolox equivalents (TE) g‐1 DP (2,2‐diphenyl‐1‐picrylhydrazyl –DPPH– assay) and 186 ± 15 mg TE g‐1 DP (oxygen radical absorbance capacity –ORAC– assay). When compared with ultrasound extraction and Pharmacopeia reference method, MAE was more efficient, representing a valuable technology. Of the 13 compounds identified by HPLC, the most abundant were rutin, chlorogenic, β‐resorcylic and caffeic acids. CONCLUSION These results indicate that mulberry leaves are of potential interest for agro‐food industries as a new source of natural antioxidants.pt_PT
dc.description.sponsorshipThis investigation is a part of the postdoctoral research by Marija Radojkovic, and she is grateful for financial support by ´the Serbian Ministry of Education, Science and Technological Development (Project No. TR 31013); the project 6818 - Transnational Cooperation Agreement between Portugal (FCT) and Serbia (MSTD) is also acknowledged. Authors are also grateful for financial support from project NORTE-01-0145-FEDER-000011 –311 Qualidade e Segurança Alimentar – uma abordagem (nano) tecnológica. The financial support from FCT/MEC through national funds and co-financed by FEDER, under the Partnership Agreement PT2020 through the project UID/ QUI/50006/2013 - POCI/01/0145/FERDER/007265, is also acknowledged. M. F. Barroso (SFRH/BPD/78845/2011) and Manuela M. Moreira (SFRH/BPD/97049/2013) are grateful to Fundação para a Ciência e Tecnologia for their postdoctoral fellowships.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1002/jctb.5541pt_PT
dc.identifier.issn1097-4660
dc.identifier.urihttp://hdl.handle.net/10400.22/15359
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSociety of Chemical Industrypt_PT
dc.relationVALORIZAÇÃO DE RESÍDUOS DA INDÚSTRIA FRUTÍCOLA
dc.relation.publisherversionhttps://onlinelibrary.wiley.com/doi/full/10.1002/jctb.5541pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectMorus nigra leavespt_PT
dc.subjectMicrowave-assisted extractionpt_PT
dc.subjectResponse surface methodologypt_PT
dc.subjectAntioxidant activitypt_PT
dc.subjectPhenolic compoundspt_PT
dc.titleMicrowave-assisted extraction of phenolic compounds from Morus nigra leaves: optimization and characterization of the antioxidant activity and phenolic compositionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleVALORIZAÇÃO DE RESÍDUOS DA INDÚSTRIA FRUTÍCOLA
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FQUI%2F50006%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F78845%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F97049%2F2013/PT
oaire.citation.endPage1693pt_PT
oaire.citation.issue6pt_PT
oaire.citation.startPage1684pt_PT
oaire.citation.titleJournal of Chemical Technology and Biotechnologypt_PT
oaire.citation.volume93pt_PT
oaire.fundingStream5876
oaire.fundingStreamSFRH
person.familyNameRadojković
person.familyNameMoreira
person.familyNameDias Soares
person.familyNamede Sá Barroso
person.familyNameMorais
person.familyNameDelerue-Matos
person.givenNameMarija
person.givenNameManuela M.
person.givenNameCristina Maria
person.givenNameMaria de Fátima
person.givenNameSimone
person.givenNameCristina
person.identifier1598822
person.identifier.ciencia-idA414-640D-9066
person.identifier.ciencia-id5016-4F99-C69D
person.identifier.ciencia-idAF16-22E5-5EBD
person.identifier.ciencia-idB111-BBFB-F200
person.identifier.ciencia-id9A1A-43FB-5C27
person.identifier.orcid0000-0002-1858-8979
person.identifier.orcid0000-0003-1500-9211
person.identifier.orcid0000-0003-0924-9681
person.identifier.orcid0000-0001-9011-5992
person.identifier.orcid0000-0001-6433-5801
person.identifier.orcid0000-0002-3924-776X
person.identifier.ridD-4990-2013
person.identifier.scopus-author-id7103289231
person.identifier.scopus-author-id25631648000
person.identifier.scopus-author-id7007053747
person.identifier.scopus-author-id6603741848
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.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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