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From waste to value: Antioxidant and antimicrobial properties of fresh and dried cardoon leaf extracts

2025-04-02Documento de conferência Acesso aberto
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datacite.subject.fosCiências Médicas::Ciências da Saúde
datacite.subject.sdg03:Saúde de Qualidade
dc.contributor.authorBarbosa, Cássia H.
dc.contributor.authorAndrade, Mariana A.
dc.contributor.authorDuarte, Maria Paula
dc.contributor.authorMateus, Ana Rita
dc.contributor.authorTomé, Sidney
dc.contributor.authorVilarinho, Fernanda
dc.contributor.authorFernando, Ana Luísa
dc.contributor.authorSanches Silva, Ana
dc.date.accessioned2026-03-04T15:34:31Z
dc.date.available2026-03-04T15:34:31Z
dc.date.issued2025-04-02
dc.description.abstractCynara cardunculus L. (cardoon) is a resilient perennial crop that is highly productive under extremely challenging conditions. Even though its flowers are used in the cheese-making process, its bioactive-rich leaves are largely discarded [1]. This study assessed the antioxidant and antimicrobial potentials of fresh and dried cultivated cardoon leaves (var. altilis DC) using ethanolic and methanolic extracts as well as the effects of oven-drying with forced air circulation on the bioactive profile. Dried leaf extracts showed better antioxidant activity than fresh leaf extracts, despite having a greater polyphenol profile. A total of 16 compounds were identified, and luteolin, apigenin, and chlorogenic acid were the most prevalent. The highest antioxidant activity was presented by dried leaf extracts for both the methanolic (EC50 = 0.8 mg/mL, AAC = 279.67) and ethanolic (EC50 = 2.1 mg/mL, AAC = 448.06) solvents. Gram-positive bacteria were more sensitive to ethanolic and methanolic extracts than Gram-negative bacteria. With lower minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values (125–2000 μg/mL) across most of the tested bacteria, the dried leaf ethanolic extract showed greater antimicrobial activity. Although Aspergillus fumigatus was only mildly inhibited, dried leaf extracts demonstrated superior antimicrobial effectiveness compared to fresh leaf extracts. These studies demonstrate the potential benefits of using dried cardoon leaves in the food, cosmetic, and pharmaceutical industries because of the bioactive components they have. These findings encourage sustainable production and consumption, which align with the goals of the United National Sustainable Development Goal 12, as well as the principles of circular economy. Cardoon leaves can be further transformed into relevant products in the current industrial world while simultaneously ensuring economic and environmental sustainability.eng
dc.description.sponsorshipCássia H. Barbosa agradece à Fundação para a Ciência e Tecnologia (FCT), Portugal, pela bolsa de doutoramento 2021.08154.BD. Os autores agradecem à empresa NINA, Lda, pelo fornecimento das folhas de cardo. Este trabalho foi financiado pelo Centro de Engenharia Mecânica e Sustentabilidade de Recursos—MEtRICs, com fundos nacionais da FCT/MCTES, e por fundos nacionais da FCT/MCTES através das bolsas UIDB/00211/2020 e 2023.15813.PEX.
dc.identifier.urihttp://hdl.handle.net/10400.18/11139
dc.language.isoeng
dc.peerreviewedn/a
dc.relationMechanical Engineering and Resource Sustainability Center
dc.relationCenter for the Study of Animal Science
dc.relation2021.08154.BD
dc.rights.uriN/A
dc.subjectCardoon Leaf
dc.subjectCircular Economy
dc.subjectCynara Cardunculus
dc.subjectCardo
dc.subjectSegurança Alimentar
dc.titleFrom waste to value: Antioxidant and antimicrobial properties of fresh and dried cardoon leaf extractseng
dc.typeconference object
dspace.entity.typePublication
oaire.awardNumberUIDB/04077/2020
oaire.awardNumberUIDB/00211/2020
oaire.awardNumber2021.08154.BD
oaire.awardTitleMechanical Engineering and Resource Sustainability Center
oaire.awardTitleCenter for the Study of Animal Science
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04077%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00211%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/2021.08154.BD/PT
oaire.citation.conferenceDate2025-04-02
oaire.citation.conferencePlacePorto, Portugal
oaire.citation.titleDare2Change – Innovation‑Driven Agrifood Business, 2 abril 2025
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamOE
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
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
relation.isProjectOfPublicationeeea3256-1b3a-4b50-a399-e612ad441012
relation.isProjectOfPublication69b75eb9-6f25-4ad8-98db-6cc7e9bcdcc7
relation.isProjectOfPublication4bf6b417-9ca7-4789-9d0c-4c83efb0fd9a
relation.isProjectOfPublication.latestForDiscoveryeeea3256-1b3a-4b50-a399-e612ad441012

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