Online determination of structural properties and observation of deviations from power law behavior - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Biomacromolecules Année : 2008

Online determination of structural properties and observation of deviations from power law behavior

Résumé

Synthetic amyloses, pullulans, phytoglycogen, rabbit liver glycogen, oyster glycogen, and dextrans were studied using high-performance size-exclusion chromatography combined with multiangle laser light scattering (MALLS) and online quasi-elastic light scattering (QELS), which provided the R-H distributions up to 65 nm. Different structural parameters were extracted from entire molar mass distributions, including the slope of the log-log plot of R-Hi versus M-i and the rho(i) = R-Gi/R-Hi ratio. This approach enabled to observe deviations from the De Gennes scaling law concept. Evidences that the power laws do not obey the general universality were furnished by the observation of strong deviations in the relation between radii and molar masses for the branched polysaccharides, a decrease of p-parameter with molar mass toward values much lower than theoretically expected, and the fact that relation between p-parameter and apparent segment density did not show the expected power law decrease with an exponent of 1/3. The universality of scaling behavior seems no longer to be realized if structural heterogeneity governs the system.
Fichier non déposé

Dates et versions

hal-02664832 , version 1 (31-05-2020)

Identifiants

Citer

Agnès Rolland-Sabaté, Maria Guadalupe Mendez-Montealvo, Paul Colonna, Veronique V. Planchot. Online determination of structural properties and observation of deviations from power law behavior. Biomacromolecules, 2008, 9 (7), pp.1719-1730. ⟨10.1021/bm7013119⟩. ⟨hal-02664832⟩

Collections

INRA INRAE
5 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More