Chemical composition of grape stalks of Vitis vinifera L. from red grape pomaces

Detalhes bibliográficos
Autor(a) principal: Prozil, Sónia O.
Data de Publicação: 2012
Outros Autores: Evtuguin, Dmitry V., Cruz-Lopes, Luísa
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.19/7546
Resumo: The chemical composition and the structure of macromolecular components of grape stalks from red grape pomaces have been evaluated. These are composed mainly of cellulose (30.3%), hemicelluloses (21.0%), lignin (17.4%), tannins (15.9%) and proteins (6.1%). Among hemicelluloses the xylan was the most abundant (ca. 12%). The parameters of cellulose unitary cell, average diameter of nanofibrils and the degree of crystallinity (75.4%) were assessed by X-ray scattering analysis. The xylan was partially acetylated glucuronoxylan (DS=0.49) possessing the Xylp:MeGlcpA ratio of 25:1. The lignin of grape stalks was suggested to be of HGS type with H:G:S molar proportion of 3:71:26 as revealed by analysis of nitrobenzene oxidation products. Among alkali soluble condensed tannins procyanidins prevailed over prodelphinidins. The abnormal response of grape stalks to kraft pulping, leading to poorly delignified fibrous material, was attributed to a particular lignin structure and it structural association with other macromolecular components of grape stalks.
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spelling Chemical composition of grape stalks of Vitis vinifera L. from red grape pomacesGrape stalksChemical compositionCelluloseLigninTanninsXylanThe chemical composition and the structure of macromolecular components of grape stalks from red grape pomaces have been evaluated. These are composed mainly of cellulose (30.3%), hemicelluloses (21.0%), lignin (17.4%), tannins (15.9%) and proteins (6.1%). Among hemicelluloses the xylan was the most abundant (ca. 12%). The parameters of cellulose unitary cell, average diameter of nanofibrils and the degree of crystallinity (75.4%) were assessed by X-ray scattering analysis. The xylan was partially acetylated glucuronoxylan (DS=0.49) possessing the Xylp:MeGlcpA ratio of 25:1. The lignin of grape stalks was suggested to be of HGS type with H:G:S molar proportion of 3:71:26 as revealed by analysis of nitrobenzene oxidation products. Among alkali soluble condensed tannins procyanidins prevailed over prodelphinidins. The abnormal response of grape stalks to kraft pulping, leading to poorly delignified fibrous material, was attributed to a particular lignin structure and it structural association with other macromolecular components of grape stalks.Repositório Científico do Instituto Politécnico de ViseuProzil, Sónia O.Evtuguin, Dmitry V.Cruz-Lopes, Luísa2023-01-13T11:29:05Z20122023-01-12T12:31:23Z2012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.19/7546engProzil, S. O., Evtuguin, D. V., & Lopes, L. P. C. (2012). Chemical composition of grape stalks of Vitis vinifera L. from red grape pomaces. Industrial Crops and Products, 35(1), 178–184. https://doi.org/10.1016/j.indcrop.2011.06.0350926-6690cv-prod-150428110.1016/j.indcrop.2011.06.0352-s2.0-80051942963info: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:RCAAP2023-01-16T15:29:40Zoai:repositorio.ipv.pt:10400.19/7546Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:45:15.257778Repositório 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 grape stalks of Vitis vinifera L. from red grape pomaces
title Chemical composition of grape stalks of Vitis vinifera L. from red grape pomaces
spellingShingle Chemical composition of grape stalks of Vitis vinifera L. from red grape pomaces
Prozil, Sónia O.
Grape stalks
Chemical composition
Cellulose
Lignin
Tannins
Xylan
title_short Chemical composition of grape stalks of Vitis vinifera L. from red grape pomaces
title_full Chemical composition of grape stalks of Vitis vinifera L. from red grape pomaces
title_fullStr Chemical composition of grape stalks of Vitis vinifera L. from red grape pomaces
title_full_unstemmed Chemical composition of grape stalks of Vitis vinifera L. from red grape pomaces
title_sort Chemical composition of grape stalks of Vitis vinifera L. from red grape pomaces
author Prozil, Sónia O.
author_facet Prozil, Sónia O.
Evtuguin, Dmitry V.
Cruz-Lopes, Luísa
author_role author
author2 Evtuguin, Dmitry V.
Cruz-Lopes, Luísa
author2_role author
author
dc.contributor.none.fl_str_mv Repositório Científico do Instituto Politécnico de Viseu
dc.contributor.author.fl_str_mv Prozil, Sónia O.
Evtuguin, Dmitry V.
Cruz-Lopes, Luísa
dc.subject.por.fl_str_mv Grape stalks
Chemical composition
Cellulose
Lignin
Tannins
Xylan
topic Grape stalks
Chemical composition
Cellulose
Lignin
Tannins
Xylan
description The chemical composition and the structure of macromolecular components of grape stalks from red grape pomaces have been evaluated. These are composed mainly of cellulose (30.3%), hemicelluloses (21.0%), lignin (17.4%), tannins (15.9%) and proteins (6.1%). Among hemicelluloses the xylan was the most abundant (ca. 12%). The parameters of cellulose unitary cell, average diameter of nanofibrils and the degree of crystallinity (75.4%) were assessed by X-ray scattering analysis. The xylan was partially acetylated glucuronoxylan (DS=0.49) possessing the Xylp:MeGlcpA ratio of 25:1. The lignin of grape stalks was suggested to be of HGS type with H:G:S molar proportion of 3:71:26 as revealed by analysis of nitrobenzene oxidation products. Among alkali soluble condensed tannins procyanidins prevailed over prodelphinidins. The abnormal response of grape stalks to kraft pulping, leading to poorly delignified fibrous material, was attributed to a particular lignin structure and it structural association with other macromolecular components of grape stalks.
publishDate 2012
dc.date.none.fl_str_mv 2012
2012-01-01T00:00:00Z
2023-01-13T11:29:05Z
2023-01-12T12:31:23Z
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/10400.19/7546
url http://hdl.handle.net/10400.19/7546
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Prozil, S. O., Evtuguin, D. V., & Lopes, L. P. C. (2012). Chemical composition of grape stalks of Vitis vinifera L. from red grape pomaces. Industrial Crops and Products, 35(1), 178–184. https://doi.org/10.1016/j.indcrop.2011.06.035
0926-6690
cv-prod-1504281
10.1016/j.indcrop.2011.06.035
2-s2.0-80051942963
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.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
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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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