COMPOSITION AND PROPERTIES OF THE POLYSACCHARIDE COMPLEX OF BIDENS FRONDOSA L. GROW-ING IN UZBEKISTAN

The qualitative and quantitative composition of the polysaccharide complex of Bidens frondosa L. has been studied. Water-soluble polysaccharides (WSPS-C – 7.3%, WSPS-H – 8.1%), pectin substances (PS – 4.8%) and hemicelluloses (HMC-A – 1.0% and HMC-B – 2.5%) were isolated from the aerial part of a series of medicinal plants (Bidens frondosa L.) growing in Uzbekistan. According to the results of chromatographic analysis, glucose, sucrose and traces of fructose were identified in an alcoholic solution. By gas chromatography (GC), rhamnose (HMC-A and HMC-B), arabinose and xylose (in all PS), glucose and galactose (in all polysaccharides, except pectin substances) were identified in hydrolysates of isolated polysaccharides. Along with neutral monosaccharides, galacturonic acid is present in pectin substances hydrolysates and, according to titrometric analysis, pectin substances is low-esterified. The isolated polysaccharides were analyzed by IR-spectroscopy.