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Molecular characteristics of functional polysaccharides
Author(s) -
Norisuye Takashi
Publication year - 1995
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19950990106
Subject(s) - radius of gyration , intrinsic viscosity , gyration , chemistry , chain (unit) , aqueous solution , amylose , molecule , hydrodynamic radius , viscosity , rheology , solvent , thermodynamics , excluded volume , polymer , physics , organic chemistry , mathematics , geometry , astronomy , starch , micelle
The molecular characteristics of sodium hyaluronate and amylose in various solvents are discussed by summarizing our recent studies. Data for the intrinsic viscosity and the radius of gyration are analyzed on the basis of the wormlike or helical wormlike chain, with excluded‐volume effects taken into account by the Yamakawa‐Stockmayer‐Shimada theory. The unperturbed hyaluronate molecule in 0.2 M or 0.5 M aqueous NaCl is shown to behave like a wormlike chain with Kuhn's segment length of about 8 nm. Amylose in the unperturbed state is more flexible, regardless of the kind of solvent, its stiffness parameter being about one half that for the hyaluronate chain, but it assumes an irregular helical conformation similar to what is predicted by conformation analysis.