RESEARCH INTO PROPERTIES AND STRUCTURE OF BASIC POLYSACCHARIDE IN PRUNUS DOMESTICA (CHERRY)
The paper deals with FTIR and <sup>13</sup>C NMR spectroscopic, thermo-gravimetric, radioactive and viscosimetric analyses of the diluted gum water solution. It revealed that there are galactan and arabinan in the basic residue of cherry gum extract in the environs of Shamakhi city (Azerbaijan) with 14% moisture mineral salts of 2-3%. Most of them include e Na<sup>+</sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup>, K<sup>+</sup>, Zn<sup>2+</sup> Fe<sup>3+</sup> ions. In the meanwhile Cu<sup>2+</sup>, Mg<sup>2+</sup>, Cd<sup>2+</sup> ions make up 0.001% of total mass. Following FTIR and C NMR analyses, there are mainly -OH, -COOH, -O- functional groups with molecular mass for arabinogalactan fraction of 130 kDa. At the same time, the quantity and activity of radioactive elements such as <sup>137</sup>Cs, <sup>226</sup>Ra, <sup>228</sup>Ra, <sup>40</sup>K, <sup>235</sup>U, <sup>238</sup>U in the content of cherry gum have been established by γ-spectrometer method. It demonstrated that isotopes dominate in <sup>238</sup>U and <sup>40</sup>K and their activity are respectively 1.31±0.243 and 04±0.16 Bk/gr. The content of these radioactive isotopes in the gum makes it possible to produce arabinogalactan-based sorbents.