Polysaccharides ofAconitum zaravschanicum

The dynamics of the accumulation of water-soluble polysaccharides and pectin substances of Aconitum zaravschanicum Steinb over the vegetation periods have been studied. The maximum amounts of polysaccharides have been established and their comparative physicohemical characteristics have been determined.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbekistan Republic, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 357–359, May–June, 1993.     

Polysaccharides ofEremurus. XV. Structure of the glucomannan ofEremurus lactiflorus

Ten oligosaccharides have been isolated from the products of the partial hydrolysis of a native acetylated glucomannan obtained fromEremurus lactiflorus O. Fedtsch. Their structures have been studied with the aid of acid hydrolysis before and after reduction with NaBH₄, by the GLC method, and also by chromatography with markers. The compositions and sequence of the monomers in tetra- and heptaoligo-saccharides have been determined by the¹³C NMR method. The glucommannan ofE. lactiflorus differs from theEremurus glucomannans studied previously by the ratio of monosaccharides, the presence of 0-Ac groups, the degree of polymerization, and the presence of a cellobiose unit (Glcp-Glcp) in the polymer chain. The repeating unit consists of 14 hexose residues.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 680–684, November–December, 1982.     

Polysaccharides ofPolygonatum I. Isolation and characterization of polysaccharides fromPolygonatum sewerzowii

Summary The water-soluble polysaccharides of the rhizomes of thePolygonatum sewerzowii Regl. have been studied. A method has been developed for separating the polysaccharide fraction. A new native acetylated glucomannan has been isolated which has been called severan and consists of manno- and glucopyranose residues linked with one another by -1 4 bonds in a ratio of 15.4:1.Institute of the Chemistry of Plant Substances, Academy of Plant Substances of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 555–559, September–October, 1978.     

Polysaccharides ofEremurus. X. Characteristics of the polysaccharides ofEremurus lactiflorus andE. luteus

Water-soluble polysaccharides have been isolated from two species ofEremurus — E. lactiflorus andE. luteus — with yields of 13.5% and 20.5%, respectively. They contained mainly glucose and mannose in ratios of 1:5 and 1:3.1. The polysaccharides ofE. lactiflorus were separated from a column of DEAE-cellulose. The yield of neutral fraction was 10.3%. Gel filtration of the polysaccharides on Sephadex G-200 showed their polydispersity. Homogeneous fractions were obtained by fractional precipitation with ethanol. They have been characterized with respect to monosaccharide composition, molecular weight, and IR spectra.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 604–608, September–October, 1979.     

Polysaccharides ofUngernia. VI. A mannan from the bulbs ofUngernia vvedenskyi

The results of a study of the structure of ungeromannan-V fromUngernia vvedenskii Khamidkh by oxidation with chromic oxide and with sodium periodate and by methylation have shown that the monosaccharide residues in it are linked by -1 4 glycosidic bonds. The macromolecule of ungeromannan-V has slight branching.Deceased.Institute of the Chemistry of Plant Substances of the Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 770–775, November–December, 1980.     

Polysaccharides of Iris I. Glucomannan fromIris sogdiana

Several fractions of alkali-soluble polysaccharides have been isolated from the seeds ofIris sogdiana Bge. The separation of one of the fractions has yielded a glucomannan consisting of glucose and mannose residues in a ratio of 1:1.2. On the basis of the results of oxidation with chromium trioxide of the acetate of the glucomannan, and of periodate oxidation and methylation, it has been established that its molecule consists of a linear chain composed of -D-glucopyranose and -D-mannopyranose residues connected by -14 bonds, although the presence of branching is not excluded. The possibility has been shown of isolating D-mannose by the hydrolysis of the seeds.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 466–471, July–August, 1979.     

Polysaccharides ofEremurus. XI. Products of the oxidation and methylation of a glucomannan fromEremurus lactiflorus

It has been established by oxidation with chromium trioxide and sodium periodate and by methylation that the monosaccharide residues in the glucomannan ofEremurus lactiflorus O. Fed. are linked by -1 ; 4 bonds, and there is a mannose residue at the nonreducing end. The glucomannan macromolecule has a linear structure.Deceased.Institute of the Chemistry of Plant Substances of the Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodynkh Soedinenii, No. 6, pp. 767–770. November–December, 1980.