Chemical composition of barks from Quercus faginea trees and characterization of their lipophilic and polar extracts

Detalhes bibliográficos
Autor(a) principal: Ferreira, Joana P.A.
Data de Publicação: 2018
Outros Autores: Miranda, Isabel, Sousa, Vicelina, Pereira, Helena
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/15556
Resumo: The bark from Quercus faginea mature trees from two sites was chemically characterized for the first time. The barks showed the following composition: ash 14.6%, total extractives 13.2%, suberin 2.9% and lignin 28.2%. The polysaccharides were composed mainly of glucose and xylose (50.3% and 35.1% of all monosaccharides respectively) with 4.8% of uronic acids. The suberin composition was: ω-hydroxyacids 46.3% of total compounds, ɑ,ω-alkanoic diacids 22.3%, alkanoic acids 5.9%, alkanols 6.7% and aromatics 6.9% (ferulic acid 4.0%). Polar extracts (ethanol-water) had a high phenolic content of 630.3 mg of gallic acid equivalents (GAE)/g of extract, condensed tannins 220.7 mg of catechin equivalents (CE)/g extract, and flavonoids 207.7 mg CE/g of extract. The antioxidant activity was very high corresponding to 1567 mg Trolox equivalents/g of extract, and an IC50 of 2.63 μg extract/ml. The lipophilic extracts were constituted mainly by glycerol and its derivatives (12.3% of all compounds), alkanoic acids (27.8%), sterols (11.5%) and triterpenes (17.8%). In view of an integrated valorization, Quercus faginea barks are interesting sources of polar compounds including phenols and polyphenols with possible interesting bioactivities, while the sterols and triterpenes contained in the lipophilic extracts are also valuable bioactive compounds or chemical intermediates for specific high-value market niches, such as cosmetics, pharmaceuticals and biomedicine
id RCAP_b0c39ad160b8df7bfa498023e77fca7a
oai_identifier_str oai:www.repository.utl.pt:10400.5/15556
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Chemical composition of barks from Quercus faginea trees and characterization of their lipophilic and polar extractsQuercus fagineabarkchemical compositionThe bark from Quercus faginea mature trees from two sites was chemically characterized for the first time. The barks showed the following composition: ash 14.6%, total extractives 13.2%, suberin 2.9% and lignin 28.2%. The polysaccharides were composed mainly of glucose and xylose (50.3% and 35.1% of all monosaccharides respectively) with 4.8% of uronic acids. The suberin composition was: ω-hydroxyacids 46.3% of total compounds, ɑ,ω-alkanoic diacids 22.3%, alkanoic acids 5.9%, alkanols 6.7% and aromatics 6.9% (ferulic acid 4.0%). Polar extracts (ethanol-water) had a high phenolic content of 630.3 mg of gallic acid equivalents (GAE)/g of extract, condensed tannins 220.7 mg of catechin equivalents (CE)/g extract, and flavonoids 207.7 mg CE/g of extract. The antioxidant activity was very high corresponding to 1567 mg Trolox equivalents/g of extract, and an IC50 of 2.63 μg extract/ml. The lipophilic extracts were constituted mainly by glycerol and its derivatives (12.3% of all compounds), alkanoic acids (27.8%), sterols (11.5%) and triterpenes (17.8%). In view of an integrated valorization, Quercus faginea barks are interesting sources of polar compounds including phenols and polyphenols with possible interesting bioactivities, while the sterols and triterpenes contained in the lipophilic extracts are also valuable bioactive compounds or chemical intermediates for specific high-value market niches, such as cosmetics, pharmaceuticals and biomedicineIng-Feng Chang, National Taiwan UniversityRepositório da Universidade de LisboaFerreira, Joana P.A.Miranda, IsabelSousa, VicelinaPereira, Helena2018-06-05T09:13:00Z20182018-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/15556engFerreira JPA, Miranda I, Sousa VB, Pereira H (2018) Chemical composition of barks from Quercus faginea trees and characterization of their lipophilic and polar extracts. PLoS ONE 13(5): e019713510.1371 /journal.pone.0197135info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-12T01:31:27Zoai:www.repository.utl.pt:10400.5/15556Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:01:10.309828Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Chemical composition of barks from Quercus faginea trees and characterization of their lipophilic and polar extracts
title Chemical composition of barks from Quercus faginea trees and characterization of their lipophilic and polar extracts
spellingShingle Chemical composition of barks from Quercus faginea trees and characterization of their lipophilic and polar extracts
Ferreira, Joana P.A.
Quercus faginea
bark
chemical composition
title_short Chemical composition of barks from Quercus faginea trees and characterization of their lipophilic and polar extracts
title_full Chemical composition of barks from Quercus faginea trees and characterization of their lipophilic and polar extracts
title_fullStr Chemical composition of barks from Quercus faginea trees and characterization of their lipophilic and polar extracts
title_full_unstemmed Chemical composition of barks from Quercus faginea trees and characterization of their lipophilic and polar extracts
title_sort Chemical composition of barks from Quercus faginea trees and characterization of their lipophilic and polar extracts
author Ferreira, Joana P.A.
author_facet Ferreira, Joana P.A.
Miranda, Isabel
Sousa, Vicelina
Pereira, Helena
author_role author
author2 Miranda, Isabel
Sousa, Vicelina
Pereira, Helena
author2_role author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Ferreira, Joana P.A.
Miranda, Isabel
Sousa, Vicelina
Pereira, Helena
dc.subject.por.fl_str_mv Quercus faginea
bark
chemical composition
topic Quercus faginea
bark
chemical composition
description The bark from Quercus faginea mature trees from two sites was chemically characterized for the first time. The barks showed the following composition: ash 14.6%, total extractives 13.2%, suberin 2.9% and lignin 28.2%. The polysaccharides were composed mainly of glucose and xylose (50.3% and 35.1% of all monosaccharides respectively) with 4.8% of uronic acids. The suberin composition was: ω-hydroxyacids 46.3% of total compounds, ɑ,ω-alkanoic diacids 22.3%, alkanoic acids 5.9%, alkanols 6.7% and aromatics 6.9% (ferulic acid 4.0%). Polar extracts (ethanol-water) had a high phenolic content of 630.3 mg of gallic acid equivalents (GAE)/g of extract, condensed tannins 220.7 mg of catechin equivalents (CE)/g extract, and flavonoids 207.7 mg CE/g of extract. The antioxidant activity was very high corresponding to 1567 mg Trolox equivalents/g of extract, and an IC50 of 2.63 μg extract/ml. The lipophilic extracts were constituted mainly by glycerol and its derivatives (12.3% of all compounds), alkanoic acids (27.8%), sterols (11.5%) and triterpenes (17.8%). In view of an integrated valorization, Quercus faginea barks are interesting sources of polar compounds including phenols and polyphenols with possible interesting bioactivities, while the sterols and triterpenes contained in the lipophilic extracts are also valuable bioactive compounds or chemical intermediates for specific high-value market niches, such as cosmetics, pharmaceuticals and biomedicine
publishDate 2018
dc.date.none.fl_str_mv 2018-06-05T09:13:00Z
2018
2018-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/15556
url http://hdl.handle.net/10400.5/15556
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Ferreira JPA, Miranda I, Sousa VB, Pereira H (2018) Chemical composition of barks from Quercus faginea trees and characterization of their lipophilic and polar extracts. PLoS ONE 13(5): e0197135
10.1371 /journal.pone.0197135
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Ing-Feng Chang, National Taiwan University
publisher.none.fl_str_mv Ing-Feng Chang, National Taiwan University
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799131100511993856