Linked Life Data

14661746

Source:http://linkedlifedata.com/resource/pubmed/id/14661746

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2003-12-9
pubmed:abstractText
SEC elution curves of spruce milled wood lignin (MWL) and guaiacyl lignin polymer models (G-DHPs) in N,N-dimethylformamide (DMF) exhibited a bimodal elution profile. Light scattering measurements indicated that these elution profiles were due to association effects between the molecules. This became apparent from the determination of high molar masses in the range 10(5)-10(8) g/mol. To study this effect, MWL and DHP were fractionated by precipitation in tetrahydrofuran (THF). The THF-insoluble fractions were found to be the fractions corresponding to the apparent high molar mass part of the DMF elution profiles. The THF-soluble fractions proved to be the less-associated fractions, with lower apparent molecular mass. The individual fractions proved to be rather stable in DMF. Accordingly, the bimodal elution profiles of the starting materials were not the result of an equilibrium between associated and molecular dispersed molecules but of different structures exhibiting a specific and stable association pattern. The different fractions were further characterised by SEC in THF after acetylation to determine molar masses in molecular disperse solutions.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0021-9673
pubmed:author
pubmed:issnType
Print
pubmed:day
12
pubmed:volume
1020
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
229-39
pubmed:dateRevised
2009-1-15
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Association behaviour of lignins and lignin model compounds studied by multidetector size-exclusion chromatography.
pubmed:affiliation
INRA/URCA, Equipe Parois et Matériaux Fibreux, CRA, 2 Esp R. Garros, BP 224, 51686 Reims Cedex, France. cathala@reims.inra.fr
pubmed:publicationType
Journal Article