학술논문
Change of Polysaccharide Molecular-Weight Distribution and Fraction Homogeneity After Periodate Oxidation.
Document Type
Article
Author
Source
Subject
*POLYSACCHARIDES
*MOLECULAR weights
*OXIDATION
*ALDEHYDES
*GEL permeation chromatography
*NUCLEAR magnetic resonance spectroscopy
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Language
ISSN
0009-3130
Abstract
The effect of periodate oxidation on the molecular weight and fraction homogeneity of dextran dialdehydes and carboxymethylcellulose dialdehydes was studied using C NMR spectra and gel-permeation chromatography with dual detection. Oxidation of dextran formed homogeneous polymer fractions containing three types of oxidized residues. Oxidation of carboxymethylcellulose occurred more slowly, caused a sharp drop of molecular weight, and formed heterogeneous polymer fractions in the early reaction stages that became homogeneous at high conversions. [ABSTRACT FROM AUTHOR]