Potential use of olive pomaces from Galega Vulgar and Cobrançosa cultivars to obtain phenolic compounds and oligosaccharides with prebiotic activity

Detalhes bibliográficos
Autor(a) principal: Freitas, Laura Anaísa
Data de Publicação: 2022
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/25424
Resumo: Mestrado em Engenharia Alimentar / Instituto Superior de Agronomia. Universidade de Lisboa
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spelling Potential use of olive pomaces from Galega Vulgar and Cobrançosa cultivars to obtain phenolic compounds and oligosaccharides with prebiotic activityolive pomacephenolic compoundsautohydrolysisoligosaccharidesprebioticsMestrado em Engenharia Alimentar / Instituto Superior de Agronomia. Universidade de LisboaThe valorisation of waste and agro-industrial residues constitutes a challenge for economically sustainable and environmentally friendly industrial processes. Olive pomace is a by-product generated in large amounts as a result of olive oil extraction. These solid residues are mostly lignocellulosic materials. The present study aimed to evaluate the potential use of extracted olive pomaces from olives with different ripening indexes (RI) and from different cultivars, namely Cobrançosa (RI: 2.51; 3.34 and 4.66) and Galega Vulgar cultivars (RI: 1.85; 2.89 and 4.82)), as source of antioxidant phenolic extracts and to produce oligosaccharides with prebiotic activity. The residual olive pomaces were dried and extracted in a Soxhlet system successively with n-hexane (6 h), ethanol (16 h) and water (16 h). Bioactive compounds were quantified in ethanol and water extracts. Galega olive pomaces presented a higher total extractives value (69.35%), oil yield (30.86%), bioactive compounds and a higher antioxidant capacity on ethanol extracts, when compared with Cobrançosa olive pomaces (57.88% total extractives and 25.82% oil). Cobrançosa pomaces’ structural components (14.47% lignin and 22.05% polysaccharides) were higher than in Galega pomaces (10.59% lignin and 13.49% polysaccharides). A hydrothermal pretreatment (autohydrolysis) was carried out following a central composite rotatable design (CCRD), as a function of temperature (T: 142-198°C) and time (t: 48-132 min). R0 equal or higher than 4.18 produced high sugar yields. Autohydrolysis conditions of 198ºC/90min generated the highest sugar yield (178.3 g/ kg dry pomace for COB-1 and 177.8 g/kg dry pomace for GAL-2), and thus the highest oligosaccharides yield (53.50% for COB 1 and 47.14% for GAL 2). Xylose, arabinose, and glucose were the main monosaccharides obtained by the previous optimized autohydrolysis condition, leading to the formation of mainly xylooligosaccharides. The production of oligosaccharides with prebiotic activity from olive pomaces showed to vary with olive cultivar and with hydrothermal conditions. RI near 2.50 obtained the best oligosaccharides yieldss.n.Dias, Suzana FerreiraMiranda, Isabel SanchesRepositório da Universidade de LisboaFreitas, Laura Anaísa20222025-09-01T00:00:00Z2022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.5/25424engFreitas, L.A. - Potential use of olive pomaces from Galega Vulgar and Cobrançosa cultivars to obtain phenolic compounds and oligosaccharides with prebiotic activity. Lisboa: ISA, 2022, 87 p.info:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:54:59Zoai:www.repository.utl.pt:10400.5/25424Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:09:17.989984Repositório 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 Potential use of olive pomaces from Galega Vulgar and Cobrançosa cultivars to obtain phenolic compounds and oligosaccharides with prebiotic activity
title Potential use of olive pomaces from Galega Vulgar and Cobrançosa cultivars to obtain phenolic compounds and oligosaccharides with prebiotic activity
spellingShingle Potential use of olive pomaces from Galega Vulgar and Cobrançosa cultivars to obtain phenolic compounds and oligosaccharides with prebiotic activity
Freitas, Laura Anaísa
olive pomace
phenolic compounds
autohydrolysis
oligosaccharides
prebiotics
title_short Potential use of olive pomaces from Galega Vulgar and Cobrançosa cultivars to obtain phenolic compounds and oligosaccharides with prebiotic activity
title_full Potential use of olive pomaces from Galega Vulgar and Cobrançosa cultivars to obtain phenolic compounds and oligosaccharides with prebiotic activity
title_fullStr Potential use of olive pomaces from Galega Vulgar and Cobrançosa cultivars to obtain phenolic compounds and oligosaccharides with prebiotic activity
title_full_unstemmed Potential use of olive pomaces from Galega Vulgar and Cobrançosa cultivars to obtain phenolic compounds and oligosaccharides with prebiotic activity
title_sort Potential use of olive pomaces from Galega Vulgar and Cobrançosa cultivars to obtain phenolic compounds and oligosaccharides with prebiotic activity
author Freitas, Laura Anaísa
author_facet Freitas, Laura Anaísa
author_role author
dc.contributor.none.fl_str_mv Dias, Suzana Ferreira
Miranda, Isabel Sanches
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Freitas, Laura Anaísa
dc.subject.por.fl_str_mv olive pomace
phenolic compounds
autohydrolysis
oligosaccharides
prebiotics
topic olive pomace
phenolic compounds
autohydrolysis
oligosaccharides
prebiotics
description Mestrado em Engenharia Alimentar / Instituto Superior de Agronomia. Universidade de Lisboa
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-01-01T00:00:00Z
2025-09-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/25424
url http://hdl.handle.net/10400.5/25424
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Freitas, L.A. - Potential use of olive pomaces from Galega Vulgar and Cobrançosa cultivars to obtain phenolic compounds and oligosaccharides with prebiotic activity. Lisboa: ISA, 2022, 87 p.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/embargoedAccess
eu_rights_str_mv embargoedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv s.n.
publisher.none.fl_str_mv s.n.
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
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