Physicochemical Characterization of Carrageenans-A Critical Reinvestigation

DC FieldValueLanguage
dc.contributor.authorBerth, Gisela
dc.contributor.authorVukovic, Jasna
dc.contributor.authorLechner, M. Dieter
dc.date.accessioned2021-12-23T16:06:33Z-
dc.date.available2021-12-23T16:06:33Z-
dc.date.issued2008
dc.identifier.issn00218995
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/7459-
dc.description.abstractKappa-, iota-, and lambda-carrageenan (food grade) were analyzed by static light scattering (MALS in batch mode) in DAM NaNO3 at 25 and 60 degrees C, earlier heated up to 90 degrees C or not. At 25 degrees C, there was a strong tendency for a concentration-dependent aggregation in the order lambda < kappa < iota. At 60 degrees C, all samples were molecularly dispersed. The strongly temperature-dependent refractive index increments (equilibrium dialysis) differ. Data interpretation in terms of the wormlike chain model using the Skolnik-Odijk-Fixman approach led to an intrinsic persistence length around 3 to 4 nm and expansion factors as high as 1.5 and above in a thermodynamically good solvent for all three types. Triple-detector HPSEC (DRI, MALS, viscometry) on the three commercial samples plus a degraded (by acidic hydrolysis) kappa-carrageenan in the same solvent/eluant at 60 degrees C yielded a uniform and slightly Curved [eta]-M relationship for 5 x 10(3) <= M/(g mol) <= 3 x 10(6) and a nearly identical molar mass dependence of the radius of gyration. HPSEC at 25 degrees C on kappa-carrageenan confirmed formation of soluble aggregates. Special emphasis was Put on analytical and methodological aspects. The reliability of the experimental data was demonstrated by analogous measurements on dextran calibration standards. (c) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 110: 3508-3524, 2008
dc.language.isoen
dc.publisherJOHN WILEY & SONS INC
dc.relation.ispartofJOURNAL OF APPLIED POLYMER SCIENCE
dc.subjectAQUEOUS-SOLUTIONS
dc.subjectbiopolymers
dc.subjectDILUTE-SOLUTION
dc.subjectFIELD-FLOW FRACTIONATION
dc.subjectgel permeation chromatography light scattering
dc.subjectIOTA-CARRAGEENAN
dc.subjectKAPPA-CARRAGEENAN
dc.subjectLAMBDA-CARRAGEENAN
dc.subjectMOLECULAR-WEIGHT
dc.subjectPolymer Science
dc.subjectSIZE-EXCLUSION CHROMATOGRAPHY
dc.subjectSOLUTION BEHAVIOR
dc.subjectsolution properties water-soluble polymers
dc.subjectstatic light scattering
dc.subjectSTATIC LIGHT-SCATTERING
dc.subjecttemperature effects
dc.titlePhysicochemical Characterization of Carrageenans-A Critical Reinvestigation
dc.typejournal article
dc.identifier.doi10.1002/app.28937
dc.identifier.isiISI:000260587000026
dc.description.volume110
dc.description.issue6
dc.description.startpage3508
dc.description.endpage3524
dc.publisher.place111 RIVER ST, HOBOKEN, NJ 07030 USA
dcterms.isPartOf.abbreviationJ. Appl. Polym. Sci.
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