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[en] Kinetic regularities of deep oxidation of small amounts of different organic compounds in the air are studied. The investigation has been carried out in non-gradient reactors in stationary regimes in a wide range of the parameter changes with the measurement of kinetic isotope effects to clarify the nature of slow stages

[en] The study of the interaction in the system ammonium perrhenate-sodium thiosulfate-hydrochloric acid-water using the chemical and X-ray phase analyses in a wide range of component ratios has shown that in the system two main process occur: formation of rhenium sulphide and separation of elemental sulphur. The degree of rhenium precipitation mainly depends on the ratio of components and to a less degree - on the mass of precipitate and the presence of high concentrations of ammonium chloride in the initial solutions. Rhenium sulphide and elemental sulphur interact in the moment of separation

[en] The interaction between components in the MoO₃ - MgO system, containing 0.1-78 mass. % MoO₃ in the temperature range from room to 1150 deg, is studied using the electron spectroscopy of diffusion reflection, X-ray phase analysis and thermography. Electron spectra of the structures, formed at different stages of thermal transformations, are determined. In the MoO₃-HgO system already at the stage of impregnation the interaction of components with the formation of hydrated forms of the basic magnesium molybdate and its double basic salts takes place. Thermal decomposition of the compounds proceeds through the stage of intermediate X-ray amorphous product of basic magnesium molybdate type and ends with the formation of highly disperse magnesium molybdate. The most complete transformation of components into MgMoO₄ takes place only at 800 deg. Magnesium molybdate is characterized by a wide absorption band at 265 nm

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[en] Stability constants have been measured of chelate complexes of nine lanthanides with N-hydroxyacetophenonevaline in aqueous media at 25, 35 and 45⁰C. Standard thermodynamic functions have been calculated. (author)