Linked Life Data

18177031

Source:http://linkedlifedata.com/resource/pubmed/id/18177031

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2008-1-25
pubmed:abstractText
Effects of shear flow on intramolecular and intermolecular associations of dilute aqueous alkali solutions of dextran, hydroxyethylcellulose (HEC), and a hydrophobically modified analogue (HM-HEC) in the presence of a chemical cross-linker agent were characterized with the aid of viscometry and rheo-small-angle light scattering (rheo-SALS) methods. The picture that emerges at short times in the course of cross-linking of the polymer solutions under the influence of a constant shear rate is that HEC coils contract because of intramolecular cross-linking, whereas the HM-HEC species show an incipient association and the dextran molecules are unaffected. At longer times, interchain cross-linking of the polymers promoted the growth of large flocs, which were disrupted by shear forces when they were sufficiently large. These findings are novel, and both the building up of aggregates and disaggregation are well substantiated by the SALS results.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1520-6106
pubmed:author
pubmed:issnType
Print
pubmed:day
31
pubmed:volume
112
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1082-9
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Intramolecular and intermolecular association during chemical cross-linking of dilute solutions of different polysaccharides under the influence of shear flow.
pubmed:affiliation
Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315, Oslo, Norway.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't