An analytical ultracentrifugation based study on the conformation of lambda carrageenan in aqueous solution

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dc.authorid0000-0002-0335-2162en_US
dc.authorid0000-0001-6951-1114en_US
dc.contributor.authorAlmutairi, Fahad M.
dc.contributor.authorAdams, Gary G.
dc.contributor.authorKök, Mehmet Şamil
dc.contributor.authorLawson, Christopher J.
dc.contributor.authorGahler, Roland
dc.date.accessioned2021-06-23T19:34:21Z
dc.date.available2021-06-23T19:34:21Z
dc.date.issued2013
dc.departmentBAİBÜ, Mühendislik Fakültesi, Gıda Mühendisliği Bölümüen_US
dc.description.abstractThe conformation and heterogeneity of lambda-carrageenan, a sulphonated galactan from red seaweed, solubilised in aqueous solvent with the assistance of microwave irradiation, has been assessed by a combination of analytical ultracentrifugation, size-exclusion chromatography, light scattering and capillary viscometry. Preparations appeared generally unimodal on the basis of sedimentation coefficient distributions from sedimentation velocity although at the highest concentrations a shoulder appears with a sedimentation coefficient approximately 1.1 times greater than that of the main component. Even under conditions commensurate with charge suppression simple linear regression was insufficient to represent non-ideal concentration dependence and the extraction of the Gralen concentration dependence parameter k(s). A more general fitting algorithm was therefore employed. Mark-Houwink-Kuhn-Sakurada analysis of the change in intrinsic viscosity [eta] with molecular weight, together with the Wales-van Holde ratio (combination of k(s), with [eta]) point to an extended flexible conformation for lambda-carrageenan in the (weight average) molecular weight range M-w = 340,000-870,000 g/mol. The origin of the larger sedimentation coefficient component appearing at the higher concentrations is considered. (C) 2013 Elsevier Ltd. All rights reserved.en_US
dc.identifier.doi10.1016/j.carbpol.2013.04.027
dc.identifier.endpage209en_US
dc.identifier.issn0144-8617
dc.identifier.issue1en_US
dc.identifier.pmid23769538en_US
dc.identifier.scopus2-s2.0-84878418551en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage203en_US
dc.identifier.urihttps://doi.org/10.1016/j.carbpol.2013.04.027
dc.identifier.urihttps://hdl.handle.net/20.500.12491/7477
dc.identifier.volume97en_US
dc.identifier.wosWOS:000321167300030en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.institutionauthorKök, Mehmet Şamil
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofCarbohydrate Polymersen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectLambda-carrageenanen_US
dc.subjectIntrinsic Viscosityen_US
dc.subjectSedimentation Coefficienten_US
dc.subjectConcentration Dependenceen_US
dc.subjectMolar Massen_US
dc.subjectExtended Flexible Coilen_US
dc.titleAn analytical ultracentrifugation based study on the conformation of lambda carrageenan in aqueous solutionen_US
dc.typeArticleen_US

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