A glucomannan from Arum korolkovii
SummaryA glucomannan has been isolated from the tubers ofArum korolkovii Regel. It has been shown that the polysaccharide contains O-acetyl groups and consists mainly of (1 → 4)-β-linked aldohexopyranose units of glucose and mannose in a ratio of 1:1.6. The nonreducing ends of the glucomannan are glucose residues, and branching is localized at C2 and C3 of mannose.
Plant Mucilages. I. Isolation and Property of a Mucous Polysaccharide, “Plantasan, ” from Plantago major L. var. asiatica Seeds
An acidic polysaccharide has been isolated from the seed of Plantago major L. var. asiatica DECAISNE. The polysaccharide, named plantasan, was homogenous on gel chromatography and glass-fiber paper electrophoresis, and it was the representative mucilage of the seed. The component carbohydrates of it were D-xylose, L-arabinose, D-galacturonic acid, L-rhamnose and D-galactose, and the molar ratio of them was 15 : 3 : 4 : 2 : O. 4.
Electrophoresis of dyed polysaccharides on cellulose acetate
Polysaccharides have been shown to react with Procion dyes to give colored products. The degree of substitution varies with the dye to polysaccharide ratio used in the reaction and with the structure of the polysaccharide. The dyed polysaccharides give visible bands on gel filtration and on electrophoresis on cellulose acetate strips. Separations of mixtures of colored polysaccharides by the latter method are complete within 5 min and match the results obtained with the undyed polysaccharides by free-boundary, Tiselius electrophoresis.