6 tulemused
A new water-soluble polysaccharide (ESPS-1), with the average molecular weight of 52.1kDa and a specific optical rotation of +169.7° (c 1.0, H2O), was successfully isolated by warm-water extraction and then purified using DEAE-Cellulose and Sephadex G-100 columns from the roots of Eremurus
A heteropolysaccharide ESP, was separated from a water extract of dried roots of Eremurus spectabilis by column chromatographies on DEAE-cellulose A52 and Sephadex G-100. Specific optical rotation, molecular mass and total carbohydrate content of ESP were -36.3°, 43.8 kDa and 97.2%, respectively.
Water-soluble glucomannans from roots of Eremurus iae and E. zangezuricus were studied. These polysaccharides were shown to contain 28.8; 69.0, and 2.2% (E. iae) and 22.6; 74.8, and 2.6% (E. zangezuricus) of D-glucose, D-mannose and acetyl groups, respectively. Their IR spectra were identical and
Water-soluble glucomannan from roots of Eremurus zangezuricus Mikheev was studied. The polysaccharide contains D-glucose, D-mannose, and acetyl groups in the molecular ratio of 1:2.8:0.38. 13C NMR studies showed that the polysaccharide under study is a linear, partly acetylated
By electron microscopy and roentgenography glucomannanes from four species of Eremurus have been examined and shown to be polymorphic. Deacetylated glucomannane produces a lamellar form with a high degree of crystallinity. Partially acetylated glucomannane produces a fibrillar form representing a