The main experimental results on interfacial catalysis of lipolytic reactions involving phospholipases A₂ and C with different specificity in the presence of some biologically active compounds containing fragments that could potentially interact with functionally important sites of the active center of these lipolytic enzymes, have been discussed. It has been suggested to use phospholipolysis as an indicator to determine the biosafety of xenobiotics and diagnostics of acute ne-crotizing pancreatitis.

The review is devoted to model compositions for exact molding of the metal articles with complicated geometrical configuration obtained from petrochemical, polymer and rosin products.

La_1-xPr_xInO₃ (x = 0,001; 0,002; 0,003; 0,004), La_0,998Pr_0,002In_1-yM_yO₃ (M - Cr³+, Mn³+; y = 0,002; 0,003) solid solutions were obtained by solid-phase method and studied by XRD, IR-spectroscopic, dilatometric and thermal analysis methods. All samples were single-phased and had the structure of orthorhombically distorted perovskite. It has been found that the IR-spectra for all solid solutions differ slightly from those for LaInO₃. It has been shown that in the temperature range of 400-1100 K all solid solutions based on lanthanum indate are thermally stable.

The effect of Pd and Ag additives (0,5-1,5 % by weight) on the crystal structure and gas sensitivity of tungsten oxide WO₃ prepared by sol-gel method, has been studied. A large increase (more than 3-4 times) of the sensitivity to CO and CH₄ as compared with the starting WO₃, and the shift of the high sensitivity band to low temperatures (from 120 °C) have been established. Response values to 300 ppm CO and 9,8 ppm CH₄ in the air have been 350 and 320 %, respectively (170 °C).

The process and mechanism of phase separation of the salt dispersion of potassium ore clay minerals using polyacryla-mide flocculants has been studied. It has been shown that it proceeds through the following sequential steps: adsorption of the polymers on the surface of clay particles in salt solution; interaction of polymer molecules adsorbed on different particles; flocculation of clay particles with the polymer; precipitation of clay solids. The product obtained after separation of brine, containing up to 80 % clay minerals, has chemical and mineralogical composition similar to that of soils, is environmentally safe and so can be used for various applications.

The conditions for deposition of metal hydroxides, the effect of drying temperature and salt template on the structural parameters of mesoporous materials, have been studied. It has been shown that hydroxide rapid precipitation and thermal treatment during drying increases the sorption capacity of obtained samples. The salt template affects the structure stronger than the temperature. It has been noted that the sorption capacity of samples obtained depends to some extent on the pH of the complete precipitation of metal hydroxides. These differences are caused by the presence of sodium sulfate in the solution, wherein the cation and anion contribute to the dehydration of the gel particles, increasing their interaction with each other.

Cobalt-shell powders of different color have been synthesized using microgranules of technogenic SiO₂, and their properties have been studied.

Convenient and technologically suitable methods for immobilization of palladium and 1,2-azole ligands on mesoporous aluminum and silicon oxides have been developed. The obtained palladium composites: Pd /Al₂O₃(60), Pd / Al₂O₃(90), Pd-L¹/ Al₂O₃(60), Pd-L² /SiO2(60) and L¹PdCl₂@SiO₂ demonstrate high catalytic activity and recovery in the Suzuki reaction in aqueous media.

The synthesis of some ferrocene derivatives and investigation of their redox properties by cyclic voltamperometry and PM7 methods has been described.

New 7α- and 7β-methyl-19-nortestosterone derivatives containing 6-chloro- or 6-methoxynicotinic acids fragments at C-17 have been prepared. The key intermediate, 19-nor-6-dehydrotestosterone acetate, was synthesized from diosgenin. A copper(I) chloride catalyzed 1,6-conjugate addition of methylmagnesium iodide to 19-nor-6-dehydrotestosterone acetate led to a mixture of 17β-acetoxy-7α-methylestr-4-еn-3-one as a major product and their 7β-isomer. Methanolysis and then acylation of made compounds with 6-chloronicotinoyl chloride or 6-methoxynicotinoyl chloride gave the corresponding target 17β-(6-chloronicotinoyloxy)-7α-methylestr-4-en-3-one, 17β-(6-chloronicotinoyloxy)-7β-methylestr-4-en-3-one and 17β-(6-methoxynicotinoyloxy)-7α-methylestr-4-en-3-one.

Using methods of theoretical conformational analysis, the Phe-Gln-Phe-Tyr-OMe tetrapeptide has been designed and synthesized. Amino acid fragments of this tetrapeptide are present in the active center of protein A, providing its binding with the Fc-fragment of human IgG antibodies. Activity of this tetrapeptide has been confirmed by studies of its binding affinity with Fc-fragment of human IgG antibodies.

New copolymers based on methylmethacrylate containing distributed phenantrenequinone molecules have been produced for the purpose of optical recording by generating holographic diffractive structures under laser illumination. Chemical conditions for formation of holograms are discussed and confirmed by the spectral characteristics of the material.

The synthesis of gelling dextran esters with phosphate and carbamate groups in the dextran - phosphoric acid - urea system has been described. The effect of reaction time on hydrogels' gel fraction yield, their functional composition and the degree of equilibrium swelling has been studied. Swelling of hydrogels in the wide range of pH has been studied. The obtained hydrogels may be used as drugs delivery systems.

Phosphate rock flotation has been studied using various surfactant mixtures, based mainly on carboxylic acids and their soaps. It has been shown that addition of aliphatic or terpene alcohols to carboxylic soaps, increases the surface activity of solutions and regulates the flotation (three-phase) foam properties. The application of this mixture for the cleaner flotation allows to obtain a concentrate containing 27-28 % of P₂O₅ and 90-94 % recovery of phosphate minerals from washed ore in the finished product.

The polysulfone hollow fiber membranes have been studied for clarification of the Acetobacter culture broth. It has been found that ultrafiltration of the broth without additional pre-treatment is unefficient due to formation the gel-layer of high molecular weight biosynthesis byproduct (M_w = 2900 kD) on the membrane surface. The method for pre-treatment of the culture broth, increasing the average flux from 8-10 up to 20-25 l/m²h, has been proposed.

The regularities for synthesis of titanium-containing wear resistant partially frit glazes for floor tiles providing the required physico-chemical properties and aesthetic characteristics in accordance with GOST 27180-2001 and STB EN ISO 10545-2007, have been established.

The possibility for producing highly siliceous micro and mesoporous vitreous materials glasses by chemical treatment of glasses based on Na₂O-B₂O₃-SiO₂ system with the phase separation, by 3 M HCl solution has been established. It has been was demonstrated that CaO incorporation into the composition of sodiumborosilicate glasses increases the specific surface of micropores.

The results of studies on the selection and evaluation of the use efficiency of natural mineral raw materials and industrial wastes in compositions for porcelain tiles are described. The optimal resource saving compositions for production of porcelain tiles under industrial manufacturing conditions with good physical and chemical properties (water absorption of 0.120.25%, the mechanical strength in bending of 59.5-60.1 MPa, frost resistance - more than 150 cycles) have been found.

By the chemical fractionation method, the effect of 1-5 w. % of biochar addition to sandy and sandy-loam sod podzol soils on the Сd, Pb and U reserves in exchangeable (sorbed reversibly) and mobile (conditionally bioavailable) forms has been investigated. It has been found that, under conditions favorable for growing of agricultural plants, an essential decrease of Cd, Pb and U reserves in forms determining their mobility and availability in sandy soils could be caused by 3-5 w. % of biochar, but in sandy-loam soils it can be obtained with 3 w. % of biochar.