Abstract
A representative mucilage, named Hibiscus-mucilage Mo, was isolated from the roots of Hibiscus moscheutos L.; it was homogeneous by ultracentrifugal analysis, electrophoresis, and gel chromatography. Its intrinsic viscosity in aqueous solution was 32.2. It is a partially acetylated, acidic polysaccharide of molecular weight ≈1,900,000, and is composed of l-rhamnose: d-galacturonic acid: d-glucuronic acid in approximately equimolar ratio. Methylation of the carboxyl-reduced derivative and partial hydrolysis studies indicated a repeating unit of the following structure. ▪
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