[en] The change in functional composition and molecular mass of crab, shrimp, and Antarctic shrimp (krill) chitin under the effect of ionizing radiation has been studied. By electron paramagnetic resonance spectroscopy it was established that primary radicals appear in positions 1 and 4 of the pyranose ring with subsequent breakdown of the glycoside bond analogous to cellulose and chitosan decay when γ-irradiated. A scheme of radiochemical transformations of chitin is suggested

[en] Change of chitin functional composition and molecular mass in crabs, shrimps and other crustaceans under effect of ionizing radiation is studied. It is established through ESR spectroscopy method that primary radicals originate in the positions 1 and 4 of pyranose cycle with subsequent decomposition of glycoside coupling similarly to cellulose and chitosan decomposition by γ-radiation. Mechanism of chemical transformations is proposed

[en] The surface morphology of cellulose gel-films after contact with water solutions of silver, selenium and platinum nanoparticles, stabilized by water-soluble polymers has been studied. It is found that nanoparticles interact with the cellulose matrix and tightly are adsorbed in it. The choice of protective polymer is essential for the process of cluster formation and optimization of hybrid nanosystem properties

[en] The variation of the structural characteristics in the transition from a block polymer to a Langmuir-Blodgett film has been investigated for cellulose acetomyristinate by the methods of X-ray diffraction analysis. The effect of length and number of acid residues on the diffraction pattern of block cellulose acetomyristinate is studied. The role of acyl substituent in the formation of an ordered structure of multilayer Langmuir-Blodgett films is established. A model of packing of cellulose acetomyristinate molecules in the Y-type films is suggested. The model is based on a two-domain structure in which close-packed myristic-acid residues are located either normally or at a certain angle to the plane of glucoside rings on one side of the polymer chain

[en] The data are presented on optimization of cellulose synthesis by Acetobacter xylinum (strain VKM V-880) and the structural characteristics of A. xylinum cellulose gel film synthesized during static cultivation. The structural changes caused by the removal of water from gel films are established and the structural organization of macromolecular chains in cellulose A. xylinum is studied