Potential use of grape stems and pomaces from Touriga Nacional and Marselan cultivars as source of polyphenols and oligosaccharides
Autor(a) principal: | |
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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/10400.5/25471 |
Resumo: | Mestrado em Engenharia de Viticultura e Enologia (Double degree) / Instituto Superior de Agronomia. Universidade de Lisboa / Faculdade de Ciências. Universidade do Porto |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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7160 |
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Potential use of grape stems and pomaces from Touriga Nacional and Marselan cultivars as source of polyphenols and oligosaccharidespomacestemspolyphenolsoligosaccharidesautohydrolysisMestrado em Engenharia de Viticultura e Enologia (Double degree) / Instituto Superior de Agronomia. Universidade de Lisboa / Faculdade de Ciências. Universidade do PortoGrape pomace and stems, in addition to lees, are the main by-products of winemaking. They represent waste disposal, or they are used for wine alcohol production, as source of grapeseed oil, fertilizer, or for animal feed. However, these by-products are important sources of nutraceutical molecules with functional properties, including polyphenols with antioxidant activity. This study aimed to valorize these cellulosic materials from winemaking as source of bioactive phenolic compounds and to produce oligosaccharides with prebiotic activity. Grapes from Touriga Nacional and Marselan varieties (Vitis vinifera L.) were used for conventional red winemaking in the winery pilot plant of the Instituto Superior de Agronomia. The summative analysis was carried out to determine the chemical composition of the grape pomace (skins and seeds) and stems of both varieties: ash content, organic content as extractives (by sequential extraction in Soxhlet using dichloromethane, ethanol, and water), lignin fraction, and structural polysaccharides (cellulose and hemicelluloses). The amount of extractives was high and around 64.1% (d.w.) for both pomaces, and 46.2% and 59.5% for Marselan and Touriga Nacional stems. The main contribution came from polar compounds solubilized by ethanol and water, representing 82% of the total extractives, with total phenols contents ranging from 213.4 in Touriga Nacional stems to 457.1 g GAE/kg of dry material in Marselan pomaces. After extractives removal, the pomaces and stems were submitted to a hydrothermal treatment to get oligosaccharides from hemicelluloses. The autohydrolysis was carried out following a central composite rotatable design as a function of temperature (142-198°C) and time (48-132 min). For the materials of both varieties, the production of sugars by autohydrolysis showed to increase with reaction temperature and time. The highest sugar yields varied from 116.3 to 168.3 g of glucose/kg dry biomass. The autohydrolysis showed to be a feasible approach to obtain added-value oligosaccharides from hemicelluloses, from grape pomaces and stemss.n.Ferreira-Dias, SuzanaRicardo da Silva, Jorge ManuelRepositório da Universidade de LisboaMangione, Roberta20222025-09-01T00:00:00Z2022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.5/25471TID:203082346engMangione, R. - Potential use of grape stems and pomaces from Touriga Nacional and Marselan cultivars as source of polyphenols and oligosaccharides. Lisboa: ISA, 2022, 75 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:RCAAP2024-11-20T19:09:50Zoai:repositorio.ul.pt:10400.5/25471Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-11-20T19:09:50Repositório 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 grape stems and pomaces from Touriga Nacional and Marselan cultivars as source of polyphenols and oligosaccharides |
title |
Potential use of grape stems and pomaces from Touriga Nacional and Marselan cultivars as source of polyphenols and oligosaccharides |
spellingShingle |
Potential use of grape stems and pomaces from Touriga Nacional and Marselan cultivars as source of polyphenols and oligosaccharides Mangione, Roberta pomace stems polyphenols oligosaccharides autohydrolysis |
title_short |
Potential use of grape stems and pomaces from Touriga Nacional and Marselan cultivars as source of polyphenols and oligosaccharides |
title_full |
Potential use of grape stems and pomaces from Touriga Nacional and Marselan cultivars as source of polyphenols and oligosaccharides |
title_fullStr |
Potential use of grape stems and pomaces from Touriga Nacional and Marselan cultivars as source of polyphenols and oligosaccharides |
title_full_unstemmed |
Potential use of grape stems and pomaces from Touriga Nacional and Marselan cultivars as source of polyphenols and oligosaccharides |
title_sort |
Potential use of grape stems and pomaces from Touriga Nacional and Marselan cultivars as source of polyphenols and oligosaccharides |
author |
Mangione, Roberta |
author_facet |
Mangione, Roberta |
author_role |
author |
dc.contributor.none.fl_str_mv |
Ferreira-Dias, Suzana Ricardo da Silva, Jorge Manuel Repositório da Universidade de Lisboa |
dc.contributor.author.fl_str_mv |
Mangione, Roberta |
dc.subject.por.fl_str_mv |
pomace stems polyphenols oligosaccharides autohydrolysis |
topic |
pomace stems polyphenols oligosaccharides autohydrolysis |
description |
Mestrado em Engenharia de Viticultura e Enologia (Double degree) / Instituto Superior de Agronomia. Universidade de Lisboa / Faculdade de Ciências. Universidade do Porto |
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/10400.5/25471 TID:203082346 |
url |
http://hdl.handle.net/10400.5/25471 |
identifier_str_mv |
TID:203082346 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Mangione, R. - Potential use of grape stems and pomaces from Touriga Nacional and Marselan cultivars as source of polyphenols and oligosaccharides. Lisboa: ISA, 2022, 75 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 |
repository.mail.fl_str_mv |
mluisa.alvim@gmail.com |
_version_ |
1817549463031382016 |