Sr_1-xGd_xFe_12-xCo_xO₁₉ ( x = 0; 0.1; 0.2; 0.3; 0.4; 0.5) ferrites have been prepared by solid-state method under air at 1473 K. It has been found that increasing the value of x first leads to a slight decrease in the Curie temperature, from 727 K for the base ferrite SrFe₁₂O₁₉ to 725 K of solid solution Sr_0.9Gd_0.1Fe_11.9Co_0.1O₁₉, but with x further increasing, the Curie temperature rises reaching 745 K at x=0.5. It has been found that at 5 K and 300 K, spontaneous magnetization (n_o) values are respectively 4.2 and 3.7 % higher for solid solution Sr_0.9Gd_0.1Fe_11.9Co_0.1O₁₉ than for the base ferrite SrFe₁₂O₁₉.

Stable ethylene glycol and aqua-ethylene glycol electrolytes on the base of K[Au(CN)₂] and SnCl₄ for the electrochemical deposition of Au-Sn alloy with metals ratio and phase composition appropriated to the low-melt eutectic (Au - 70 at.%, Sn -30 at.%, Au₅Sn, AuSn) have been elaborated. The role of electrolytes components in the redox processes proceeding on the cathode and anode and their on the rate of deposition and Au : Sn ratio in the alloy have been developed. Composition and structure of Au-Sn alloy coatings have been investigated.

Synthetic calcium sulphate dihydrate has been prepared by sulfuric acid decomposition of dolomite powder. Parameters of process (order of mixing H₂SO₄ and MgSO₄ water suspension, MgSO₄ concentration, time of recrystallization, quantity of seed crystals, etc) affecting properties of high-strength gypseous binder have been determined. It has been shown that the product contains mainly α-CaSO₄ • 0,5H₂O and its properties meet the requirements of functional standard.

The method of template synthesis has been applied for the first time to control the pore structure of montmorillonite clay. Magnesiun sulfate hes been used as a template, having high hydration heat values for both cation and anion. Its presence in the swollen clay is accompanied by dehydration of clay particles, resulting in their interaction and formation of a structure having much higher sorption capasity and specific surface than for acid activated clay samples. The main factors of the template effect upon the improvement of montmorillonite clay parameters, as well as ways for further developments, are discussed. The explanation for regularities observed in montmorillonite clay structure formation and structural parameters' change, is given based on the colloidal chemistry background.

Authors' ideas on the chemistry of water deoxygenation on fibrous catalysts containing palladium or iron hydroxides, are presented. The most plausible mechanisms for oxygen reduction on these catalysts are suggested.

The effect treatment of glauconite by 10 % HCl at 30-90 °C on its composition, structure and catalytic properties in the reaction of turpentine isomerization has been determined. With activation temperature increasing, Al₂O₃, FeO, MgO, K₂O and CaO contents in glauconite decreases, while the specific surface area and the catalytic activity in the reaction of turpentine isomerization both increase. Turpentine isomerization on glauconite yields mainly camphene and dipentene, the highest amounts of them being formed for 4 h on the catalyst sample modified by 50 ml/g of 10 % HCl at 50 °C.

For the first time, the effect of Mn-oxide precursors (aqueous solutions of Mn(NO₃)₂, MnSO₄ and MnCl₂) on the physico-chemical properties of supported catalysts has been studied. It has been established that there are substantial differences in the nature of the precursor salt solutions' interaction contributing to the formation of catalysts with different physico-chemical and performance properties. It has been shown that the sample obtained by using an aqueous impregnating solution of Mn(NO₃)₂ has the best catalytic activity in the oxidation of divalent iron, while one prepared from MnCl₂ - the lowest one. The catalyst sample prepared using MnSO₄ aqueous solution for impregnation, has the highest abrasion resistance.

Electrodeposition of copper-zinc alloy of non-cyanide sorbate electrolyte at current densities of 1,0-3,5 A/dm² allows to produce yellow brass with a copper content of about 63-64 wt.°%. Using pulsed current allows to intensify the process of deposition 1,3-1,6 times and to increase the current efficiency of the alloy by 1,2-4,2 %. Coatings obtained by pulsed electrolysis have fine-grained structure, more compact and with good adhesion to the steel substrate. Imposition of pulsed current allows deposition of homogeneous phase coating and eliminates formation of intermetallic compounds.

A number of 2-acylcyclohexane-1,3-diones with phthalimidoyl substituent in the side chain have been synthesized through acylation of 5-mesitylcyclohexane-1,3-dione and dimedone by the terminal phthalimidoyl substituted acetic, propionic and butyric acid chlorides. Depending on the length of the acyl chain, these р-triketones in the reaction with ethoxy-amine formed ethoxyimino derivatives both at acyl carbonyl group and at ring oxo group.

Synthesis of new 2'(3')-fluorinated analogues of 5-azacitidine has been performed by condensation of silylated 5-azacito-zine with blocked fluorodeoxy pentofuranosides. Deblocking of intermediate nucleosides produced target 2'-desoxy-2'-fluor-5-azacitidine and 3'-desoxy-3'-fluor-5-azacitidine in high yields. Structure of synthesized compounds has been proved by spectral methods.

A series of potential bioactive nitrogen zerumbone derivatives by carbonyl group containing terpene ring, has been synthesized. For the first time, microwave irradiation method has been used for their preparation. The structures of the obtained compounds have been determined by 1Н NMR and IR spectroscopy.

Syntheses of a phosphoramidite reagent for 5'-phosphorylation of oligonucleotides, and of a modified solid-phase support (controlled pore glass, CPG) for 3'-phosphate modification of oligonucleotides are described. Efficasy of the reagents has been confirmed by the synthesis of phosphorylated oligonucleotides. The oligonucleotides have been analyzed by electrophoresis and HPLC.

The contribution of monooxygenase component in carcinogenic activation of a key procarcinogenic derivative of benzo(a) pyrene - 7,8-benzo(a)pyrenediol in lung adenocarcinoma cell line A549 has been evaluated. It has been shown that the contribution of monooxygenase process under the experimental conditions in A549 cells is only 13 %, which corresponds with the relatively low level of constitutive expression of CYP1A1 and CYP1B1. When cells are exposed to 20-methylcholanthrene, monooxygenase component in carcinogenic activation of 7,8-benzo(a)pyrenediol has reached 25 %. Moreover, 90 % is accounted for a "complete" carcinogen - diolepoxide-2. As 20-methylcholanthrene is a polycyclic aromatic compound and exists with a benzo(a) pyrene in the tobacco smoke, this suggests a whole pool of polycyclic aromatic hydrocarbons entering the organism may significantly affect not only the level but also the direction of carcinogenic PAH activation of individual compounds.

Hollow fiber ultrafiltration membranes on the basis of polysulfone and multiwalled carbon nanotubes (MWCNT) have been obtained by phase inversion process. MWCNT were dispersed in N,N-dimethylacetamide by non-covalent modification method using polyvinylpyrrolidone, which is one of the component of the spinning solution. It has been shown that incorporation of MWCNT at low concentration has a significant effect on the structure and transport properties of the hollow fiber membranes.

Mechanism of action for flame-retardant mix of melamine and red phosphorus on oxidative thermal destruction process and combustion of polyamide 6 based polymer compounds has been studied. By thermogravimetry, technological properties of polymer compounds have been estimated.

Thermocracking of model heavy oil feedstock in presence of surfactants has been carried out. Gas, petrol and diesel fractions, liquid oil residue and coke have been obtained. Composition of gas and distillate fractions has been analyzed by the gas and liquid-gas chromatography methods. It has been determined, from thermocracking material balance data, that use of surfactants increases the yield of liquid fractions and decreases coke formation. A number of the physicochemical characteristics was been determined, for the purpose of distillate fractions' quality rating.

It has been shown that both gravimetric method and electrochemical methods can be used to evaluate the effect of additives on the rate of corrosion. The results of determining the corrosion rate by the electrochemical method under dynamic conditions are in good agreement with the results of field tests.

Photocatalytically active CeO₂-TiO₂ composites have been prepared by the sol-gel method from inorganic precursors with varied СеО₂/ТiO₂ ratio. Their catalytic activity has been shown to be higher than that for individual СеО₂ or TiO₂ oxides and can be used for photocatalytic water purification.

The effect of modification of phosphorite powder with low P₂O₅ content by inorganic acids on extraction of water-soluble and citric-soluble components, as well as on dustiness, has been studied. Formation of new phases on the surface of activated phosphorite powder has been established by X-ray analysis. On the basis of data obtained, the optimal conditions for the phosphorite powder modification have been determined.