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

2012Journal article Open access
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dc.contributor.authorProzil, Sónia O.
dc.contributor.authorEvtuguin, Dmitry V.
dc.contributor.authorCruz-Lopes, Luísa
dc.date.accessioned2023-01-13T11:29:05Z
dc.date.available2023-01-13T11:29:05Z
dc.date.issued2012
dc.date.updated2023-01-12T12:31:23Z
dc.description.abstractThe 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.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationProzil, 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.2011.06.035pt_PT
dc.identifier.doi10.1016/j.indcrop.2011.06.035pt_PT
dc.identifier.eid2-s2.0-80051942963
dc.identifier.issn0926-6690
dc.identifier.slugcv-prod-1504281
dc.identifier.urihttp://hdl.handle.net/10400.19/7546
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectGrape stalkspt_PT
dc.subjectChemical compositionpt_PT
dc.subjectCellulosept_PT
dc.subjectLigninpt_PT
dc.subjectTanninspt_PT
dc.subjectXylanpt_PT
dc.titleChemical composition of grape stalks of Vitis vinifera L. from red grape pomacespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage184pt_PT
oaire.citation.issue1pt_PT
oaire.citation.startPage178pt_PT
oaire.citation.titleIndustrial Crops and Productspt_PT
oaire.citation.volume35pt_PT
person.familyNameGonçalves Oliveira Valente da Cruz-Lopes
person.givenNameLuísa Paula
person.identifier.ciencia-id7916-0833-5B38
person.identifier.orcid0000-0001-6502-7202
rcaap.cv.cienciaid7916-0833-5B38 | Luísa Paula Gonçalves Oliveira Valente da Cruz-Lopes
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationfa1274f5-f7f8-4afd-8ed8-5f988d6c7226
relation.isAuthorOfPublication.latestForDiscoveryfa1274f5-f7f8-4afd-8ed8-5f988d6c7226

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