Abstract
A representative mucilage, named Hibiscus-mucilage SL, was isolated from the leaves of Hibiscus syriacus L. It was homogeneous on electrophoresis and gel chromatography. Its intrinsic viscosity value in aqueous solution was 26.5. It was mainly composed of acidic polysaccharide, and its molecular weight was estimated to be about 2000000. The polysaccharide is composed of L-rhamnose : D-galactose : D-galacturonic acid : D-glucuronic acid in the molar ratio of 8.0 : 1.1 : 8.0 : 4.0. Methylation analysis of both the mucilage and the carboxyl-reduced derivative, and partial hydrolysis studies enabled elucidation of the structural features.
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