What question did this study set out to answer?

To investigate the dilute solution conformation, hydrodynamic properties, and molar mass dependencies of various dextran polysaccharides in water and sodium hydroxide.

July 1, 2000Macromolecules

Structure Properties of Dextran. 2. Dilute Solution

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Authors

CICatalina E. IoanUniversity of Freiburg TAThomas AberleUniversity of Bern WBWalther BurchardUniversity of Freiburg

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Implication

Experimental analysis reveals molar mass dependencies of hydrodynamic dimensions in dextrans, indicating that increasing branching density alters macromolecular conformation.

Key Points

To investigate the dilute solution conformation, hydrodynamic properties, and molar mass dependencies of various dextran polysaccharides in water and sodium hydroxide.
Evaluated 13 dextran samples of varying molar masses, including commercial Leuconostoc mesenteroides products, a fractionated sample, and five acid-degraded samples in water and 0.5 M NaOH.
Characterized macromolecular dimensions using static and dynamic light scattering, viscometry, reducing end-group analysis, and online SEC-MALLS with viscosity detection.
Radius of gyration measurements for fractionated samples converged onto a single universal curve, whereas intrinsic viscosity split into distinct curves for commercial versus acid-degraded samples.
Polydispersity increased markedly with weight-average molar mass, though to a lesser extent than predicted by theoretical models for hyperbranched polysaccharides.
Interpenetration and solvent-draining functions increased as molar mass increased, directly reflecting an elevated branching density.

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Ioan et al. (2000) studied this question.

synapsesocial.com/papers/6a70b6a82163a0a01bc4ec33 https://doi.org/10.1021/ma000282n

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Implication

Experimental analysis reveals molar mass dependencies of hydrodynamic dimensions in dextrans, indicating that increasing branching density alters macromolecular conformation.

Structure Properties of Dextran. 2. Dilute Solution

Discussion

Member takes

Implication

Key Points

Cite This Study

Structure Properties of Dextran. 2. Dilute Solution

Discussion

Member takes

Implication

Key Points

Cite This Study

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