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Effects of different treatments on the phenolic composition of acorn extracts from Quercus robur and Quercus rotundifolia

2022Documento de conferência Acesso aberto
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dc.contributor.authorAlonso-Esteban, José Ignacio
dc.contributor.authorMateus, Cristiano
dc.contributor.authorFinimundy, Tiane C.
dc.contributor.authorRodrigues, Daniele Bobrowski
dc.contributor.authorBabo, Pedro
dc.contributor.authorCanadas, Raphael
dc.contributor.authorBarros, Lillian
dc.date.accessioned2023-03-15T14:46:21Z
dc.date.available2023-03-15T14:46:21Z
dc.date.issued2022
dc.description.abstractThe European oak (Quercus robur L.) and the holm oak (Quercus rotundifolia Lam.) are two examples of endemic species that already contribute for the socio-economic development of the Iberian Peninsula. The first one stands out because of its wood, and the second one has been traditionally managed as savannah-like ecosystems for livestock breeding [1]. However, from a chemical perspective, the potential of these plants, especially their acorns, can be further expanded. For this work, acorn samples of the two mentioned species were submitted to four different extraction methods in order to characterize the phenolic compounds of each extract. The four extractions were the following: 1 – maceration with water at 40 ºC for one hour; 2 – infusion with boiling water for 5 minutes; 3 – decoction with boiling water for 5 minutes; 4 – maceration with ethanol 80% (v/v) at room temperature for 1 hour. The extractions were performed using a solid/liquid ratio of 25 g/L and the phenolic compounds were analyzed by HPLD-DAD-ESI/MS [2]. The average extraction yields ranged between 9.58 – 21.89 g of extract/100 g for Q. robur and from 2.88 to 6.82 g of extract/100 g for Q. rotundifolia. Regarding the composition of phenolic compounds, gallic and ellagic acids were the most abundant molecules found in the samples of these species [3]. The total content of phenolic compounds varied between 71 - 124 mg/g of extract and 70 – 90.5 mg/g of extract in Q. rotundifolia and Q. robur, respectively. Gallic acid was the compound which was found in the greatest concentration in all the extractions, reaching its maximum concentration when the aqueous maceration extraction was applied. Ellagic acid and its derivatives (ellagitannins) were also found in the extracts, but to a lesser extent than gallic acid. Considering the extraction yield and the content of phenolic compounds, the most promising extraction method was the aqueous maceration, which could be applied to obtain extracts rich in gallic acid and ellagitannins from acorns.pt_PT
dc.description.sponsorshipThe authors are grateful to FCT (Portugal) for financial support through national funds FCT/MCTES (PIDDAC) to CIMO (UIDB/00690/2020 and UIDP/00690/2020) and SusTEC (LA/P/0007/2021); L. Barros thanks FCT for her Institutional Employment Program-Contract. J. I. Alonso-Esteban thanks the Ministry of Universities (Spain) and the European Union-Next Generation EU Funds for the Margarita Salas grant (UCM/572725/2021). This work was financed by "La Caixa" Foundation through "Programa Promove (Concurso 2020 - Projetos piloto inovadores)", within the scope of the project Acorn4MED - Valorização do resíduo florestal bolota para aplicação em biomedicina.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAlonso-Esteban, José Ignacio; Mateus, Cristiano Gabi dos Santos; Finimundy, Tiane C.; Rodrigues, Daniele B.; Babo, Pedro; Canadas, Raphael; Barros, Lillian (2022). Effects of different treatments on the phenolic composition of acorn extracts from Quercus robur and Quercus rotundifolia. In XXVI Encontro Galego-Portugues de Química: Book of Abstracts. Santiago de Compostelapt_PT
dc.identifier.isbn978-84-09-45895-0
dc.identifier.urihttp://hdl.handle.net/10198/27745
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherUniversidade de Santiago de Compostelapt_PT
dc.relationLA/P/0007/2021pt_PT
dc.relationMountain Research Center
dc.relationMountain Research Center
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAcorn extractspt_PT
dc.subjectQuercus roburpt_PT
dc.subjectQuercus rotundifoliapt_PT
dc.subjectResearch Subject Categories::TECHNOLOGY::Chemical engineering::Food technologypt_PT
dc.titleEffects of different treatments on the phenolic composition of acorn extracts from Quercus robur and Quercus rotundifoliapt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleMountain Research Center
oaire.awardTitleMountain Research Center
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00690%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00690%2F2020/PT
oaire.citation.conferencePlaceSantiago de Compostelapt_PT
oaire.citation.endPage350pt_PT
oaire.citation.startPage350pt_PT
oaire.citation.titleXXVI Encontro Galego-Portugues de Química: Book of Abstractspt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameMateus
person.familyNameFinimundy
person.familyNameRodrigues
person.familyNameBarros
person.givenNameCristiano
person.givenNameTiane C.
person.givenNameDaniele Bobrowski
person.givenNameLillian
person.identifier469085
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person.identifier.ciencia-id2F18-67B1-776A
person.identifier.ciencia-idA91B-FE1D-B275
person.identifier.ciencia-id9616-35CB-D001
person.identifier.orcid0000-0003-0757-9548
person.identifier.orcid0000-0003-3516-0795
person.identifier.orcid0000-0003-0260-5751
person.identifier.orcid0000-0002-9050-5189
person.identifier.ridJ-3600-2013
person.identifier.scopus-author-id35236343600
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
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
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