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Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/34790
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dc.contributor.authorRencoret, Jorge-
dc.contributor.authorRío Andrade, José Carlos del-
dc.contributor.authorMarques, Gisela-
dc.contributor.authorGutiérrez Suárez, Ana-
dc.contributor.authorIbarra, David-
dc.contributor.authorSantos, José Ignacio-
dc.contributor.authorJiménez-Barbero, Jesús-
dc.contributor.authorMartínez, Ángel T.-
dc.date.accessioned2011-04-19T11:53:57Z-
dc.date.available2011-04-19T11:53:57Z-
dc.date.issued2008-
dc.identifier.citationHolzforschung 62: 514-526 (2008)es_ES
dc.identifier.urihttp://hdl.handle.net/10261/34790-
dc.descriptionRencoret, Jorge et al.-- 13 pages, 7 figures, 6 tables, 49 references.es_ES
dc.description.abstractThe chemical structure of milled-wood lignins from Eucalyptus globulus, E. nitens, E. maidenii, E. grandis, and E. dunnii was investigated. The lignins were characterized by analytical pyrolysis, thioacidolysis and 2D-NMR that confirmed the predominance of syringyl over guaiacyl units and only showed traces of p-hydroxyphenyl units. E. globulus lignin had the highest syringyl content. The heteronuclear single quantum correlation (HSQC) NMR spectra gave information about relative abundances of inter-unit linkages in the whole polymer. All the lignins showed a predominance of β-O-4' ether linkages (66-72% of total side-chains), followed by β-β' resinol-type linkages (16-19%) and lower amounts of β-5' phenylcoumaran-type (3-7%) and β-1' spirodienone-type linkages (1-4%). The analysis of desulphurated thioacidolysis dimers provided additional information on the relative abundances of the various carbon-carbon and diaryl ether bonds, and the type of units (syringyl or guaiacyl) involved in each of the above linkage types. Interestingly, 93-94% of the total β-β' dimers included two syringyl units indicating that most of the β-β' substructures identified in the HSQC spectra were of the syringaresinol type. Moreover, three isomers of a major trimeric compound were found which were tentatively identified as arising from a β-β' syringaresinol substructure attached to a guaiacyl unit through a 4-O-5' linkage.es_ES
dc.description.sponsorshipThis study has been funded by the Spanish project AGL2005-01748, the CSIC project 2006-4-0I-039 and the BIORENEW EU-Project (NMP2-CT-2006-026456). Javier Romero (ENCE, Pontevedra, Spain) is acknowledged for providing the wood samples. J.R. thanks the CSIC for a I3P fellowship and the COST Action E-41 for funding an stay at KTH; and GM thanks the Spanish MEC for a FPI fellowship.es_ES
dc.language.isoenges_ES
dc.publisherWalter de Gruyteres_ES
dc.rightsopenAccesses_ES
dc.subjectEucalypt woodes_ES
dc.subjectMilled-wood lignin (MWL)es_ES
dc.subjectPyrolysis-GC/MSes_ES
dc.subject2D NMRes_ES
dc.subjectHSQCes_ES
dc.subjectThioacidolysises_ES
dc.subjectDimerses_ES
dc.subjectTrimerses_ES
dc.subjectDesulphurationes_ES
dc.subjectEucalyptus globuluses_ES
dc.subjectEucalyptus nitenses_ES
dc.subjectEucalyptus maideniies_ES
dc.subjectEucalyptus grandises_ES
dc.subjectEucalyptus dunniies_ES
dc.titleStructural characterization of milled wood lignin from different eucalypt specieses_ES
dc.typeartículoes_ES
dc.identifier.doi10.1515/HF.2008.096-
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderMinisterio de Economía y Competitividad (España)-
dc.contributor.funderConsejo Superior de Investigaciones Científicas (España)-
dc.contributor.funderEuropean Commission-
dc.contributor.funderMinisterio de Educación y Ciencia (España)-
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003329es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003339es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100000780es_ES
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.cerifentitytypePublications-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.grantfulltextopen-
item.openairetypeartículo-
item.fulltextWith Fulltext-
item.languageiso639-1en-
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