(Vestsi Natsiyanalnai Akademii Navuk Belarusi)
SERIES OF CHEMICAL SCIENCES
Published by The Belaruskaya Navuka Publishing House, Minsk, Republic of Belarus
| Proceedings of the National Academy of Sciences of Belarus (Vestsi Natsiyanalnai Akademii Navuk Belarusi) SERIES OF CHEMICAL SCIENCES Published by The Belaruskaya Navuka Publishing House, Minsk, Republic of Belarus |
Summary: Conditions of TiO2• nH2O films formed on the surface of electroplated nickel coatings by sol-gel method are discussed. It is shown that presence of these films causes to the 2-5 times deterioration of acid corrosion rate and double increase in microhardness and wear resistance.
Poddenezhny E.N., Plushch B.V., Boiko A.A.
Maturing of volume formed gels upon synthesis of silica glass by sol-gel method. pp. 10--14
Summary: The problems of structure maturing of volumeformed gels upon synthesis of silica glass by modifited sol-gel method were studied. The intermicelleous liquid, distilled water, hydrofluoric and oxalic acids as well as ammonium hydroxyde were utilized as liquids media for maturing. The effect of type and properties of liquids on physical characteristics of the gels prepared and efficiency of maturing was investigated.
Strel'tsov E.A.
Electrochemical synthesis of chalcogenides and metal solid solutions. pp. 15--22
Summary: Regularities of electrodeposition of metal chalcogenides as well as solid solutions have been considered using undeipotential deposition (UPD) of metal adatoms on selenium and tellurium. It has been shown that UPD may be used not only for electrosynthesis of metal solid solutions and chalcogenides but also for control of their micro- and nanostructure.
Summary: Flammability, strain and strengh properties, thermal, thermomechanical properties of pyromellitimide films modified with phosphorus anhydride have been studied. The effect of the modifying agent on kinetics of cyclization of polyamic acid compositions containing phosphorus anhydride has been investigated. We have demonstrated that the modification of polypyromellitimide with phosphorus anhydride allows oxygen index of the polyimide material, to be steeply increase, its thermal and thermomechanical properties to be considerably improve and the amount of heat generated during its burning to be grealty reduce at the same time practically preserving its good strain and strength characteristics.
Soldatov V.S., Kuvaeva Z.I., Bychkova V.A., Vodopyanova L.A.
Lon-exchange equilibria at lysine extraction by liquid sulfocationite. pp. 27--31
Summary: The amounts of the ionic species of lysine Lys2+ and Lys+ extracted from the lysine-NaCl aqueous solutions by a liquid cation exchanger (dinonyl naphtalene sulfonic acid dissolved in heptane) have been computed. The increase in selectivity of Lys+ has been observed at pH 2.5--4.0. The effect was interpreted accounting for an additional interaction between ions Lys2+ and Lys+ in the organic phase.
Mitskevich E.N., Novikov G.I.
Thermodynamic characteristics of process of oxidation of ferrous salt solutions by oxygen. pp. 32--36
Summary: The reaction of ferrous salts solutions oxidation by oxygen has been studied using a calorimeter with the isothermal cover. The DH° value for this reaction at 298 and 313 K have been determined.
Volkova E.S., Roganov G.N., Guzikov A.Ya.
Thermodynamic properties of some diacetylene hydrocarbons and their halogen derivatives. pp. 37--40
Summary: The values of heat capacities at constant pressure, entropies, adduced enthalpies and energies of Gibbs have been calculated by methods of statistical thermodynamic for pentadiyne-1,3, hexadiyne-2,4, hexadiyne-1,5, 1,6-dibromhexadiyne-1,5 and difluoracetylene on the basis of molecular and spectral data in the interval 298.15--1000 K. allowing for ideal gas conditions.
Orobei N.V., Butylin B.A., Novikov G.I.
Detetmination of dessolution heats of hexafluorosilicates in water. pp. 41--43
Summary: The values of dissolution heats of hexafluorosilicates of alkali and alkali -- earth elements in water at 298.15 K are determined by a calorimeter equipment with the isothermal cover.
Azarko V.A., Potkin V.I., Agabekov V.E., Kaberdin R.V., Sharendo E.V., Nechai N.I.
Filmforming and spectral properties of 2-nitro-3,4-dichloro-1,3-butadiene derivatives. pp. 44--49
Summary: Filmforming, spectral and resist properties of thin films obtained by vacuum vapor deposition of 2-nitro-3,4-dichloro-1,3-butadiene derivatives have been studied.
Supichenko G.N., Skakovskii E.D., Agabekov V.E., Murashko V.L., Dikusar E.A., Bagutskii V.V.
Features of 3-methyl-3-triphenylmethylperoxy-l-butyne thermal decomposition in solution. pp. 50--53
Summary: Thermolysis of 3-methyl-3-triphenylmethylperoxy-1-butine solutions has been investigated and quantitative characteristics of its thermal decomposition in deuterocyclohexane as well as radical formation in decane -- chlorobenzene mixture have been obtained. It has been established that the reaction of triphenylmetoxy radical isomerization influences essentially on products formation.
Komarov V.S., Rabenok M.G., Repina N.S.
Effect of ultrasound and vibration on formation of aluminium and ferrous hydroxide structures at the presence of electrolyte. pp. 54--58
Summary: The mechanism of structure formation on the example of aluminium and iron hydroxides subjected to ultrasound and vibration at the presence of electrolyte has been disclosed in this paper. It has been shown the action of chemical and physical factors is directing to extension of specific surface of obtaining sorbents mainly. It has been givan explanation to this phenomenon from the point of view of colloid chemistry.
Kenigsberg Ò.P., Agabekov V.E., Monakhova Î.Â.
Subphase influence on properties of monomolecular layers of polyvinylbenzals. pp. 59--64
Summary: Molecular and superficial properties of monolayer films of polyvinyl alcohol derivatives on water and aqueous solutions of J2, CdJ2 and CdCl2 were investigated. It was established that the surfactants are adsorbed on polymer molecules. J2 is an inside plasticizer and formed complex with polymer in monolayer.
Summary: To find promising immunostimulator prototypes among synthetic prostaglandin analogues, immunotropic activities of a number of new synthesized prostanoids were studied. In terms of their chemical structure, the compounds were 11-dezoxi PGE analogues and PGH carbaanalogues synthesized on the basis of new prostanoid synthons such as 1,1-ethylenedioxy-2-acylcyclopentenes, 2-acylcyclopentene-2-en-1-ols and 2-acylbicyclo[2, 2, 1] heptenes. It was found out that 7 of the 15 studied prostanoids, administrated per os at saturation doses of 0.5-10 µg/kg simultaneously with immunization, increased the primary immune response to sheep red blood cells in CBA mice. It should be pointed out that oxoethylic, oxopentylic and 6-oxocarbonylic fragments resulted, on condition of the presence of malonic ester residue in w-chain, in gradual enhancement of immunostimulating activity of the prostanoids. The exchange of malonic ester residue for pentyl or phenylisoxazolic fragment, carried out in w-chain, resulted in displaying the sufficient immunosuppressive activity.
Puchkaev A.V., Tarun E.I., Adzerikho I.E., Mrochek A.G., Minchenya V.Ò., Metelitsa D.I.
Inactivating action of ultrasoonic cavitation on oligomeric ferments-glucose-6-phosphate dehydrogenase and urease. pp. 70--76
Summary: Inactivation of two oligomeric enzymes -- glucose-6-phosphate dehydrogenase (G6PDH) and soya bean urease by ultrasonic cavitation (27 kHz, specific intensity -- 60 W/cm2) was studied in buffered physiological solution, pH 7.4 and in water at 25-60 °C. Two-step US-inactivation of G6PDH was shown at 35-45 °C and the rate constants of inactivation were determined for both steps. Any steps of urease US-inactivation at 37-60 °C and enzyme concentration 127.1 nM were not displayed. The US-inactivation rates of both enzymes were much higher as those at their thermoinactivation.
Babitskaya S. V., Kiselev P.A., Kisel M.A.
Synthesis of new phospholipid probes with intramolecularly quenched fluorescence and their action as phospholipase A2 substrates. pp. 77--82
Summary: New fluorescent analogues of phosphatidylethanolamine with intramoleculariy quenched pyrene fluorescence by the 2,4,6-trinitrophenyl or 2,4-dinitro-5-aminophenyl group were synthesized. Spectral properties of substances obtained were described. A possibility of using of these probes as substrate for phospholipase A2 to monitor the enzymatic activity was demonstrated.
Summary: The activation energy values of thermal oxidative destruction obtained in a temperature range corresponding to initiation of polymer oxidation have been proposed to be used in calculation of intermolecular interaction energy in polyethylene.
Omelchenko T. N., Elinson I.S., Martinovich V.I., Soldatov V.S., Tsygankov V.I.
Fiber copolymers with aldehyde groups and ion exchangers based on them. pp. 87--92
Summary: Graft polymerization of acrolein on polypropylene fibers followed by amination of the graft copolymers and some properties of the ion exchangers created have been studied.
Senkov G. M., Nikitina A.M., Gorbatsevich M.F., Chuiko V.A., Udarov B.G.
Influence of static exchange capacity of catalyst on a-pinen isomerization. pp. 93--95
Summary: The influence of static exchange capacity (SEC) on the isomerization of a-pinen over sulfocationit catalyst has been investigated in the range 0.57 ¸ 3.7 mg-eqv/g. The conversion of a-pinen and its isomerization into camphen is more effective for catalyst with SEC = 3.13 mg-eqv/g.
Summary: The binders on basis of the cationic bituminous emulsion for granulation and hydrophobization of porous clay-salt powder are described.
Gubarev A.A., Kopylovich M.N.,Gorskii G.M.
Aluminium-resin: formation and stability. pp. 99--102
Summary: The influence of pH-value and concentration of aluminium ions on various kinds of glue was studied. The physico-chemical characteristics of aluminium-resin complexes were calculated by molecular-mechanical method.
Klyuev A.Yu., Shlyashinskii R.G., Prokopchuk N.R., Shostak L.M.
Features of thermooxidative destruction of esters of colophohyterpenemaleic resins. pp. 103--107
Summary: Stability of esters of colophonyterpenemaleic resins to termooxidative destruction are studied.
Levitskii I.A., Gailevich S.A.
About application of belarussian kaolins in production of sanitary ceramic products. pp. 108--111
Summary: The study explores possible application of enriched kaolins of Belarus in ceramic mass for production of sanitary ceramic products. Various contents for the ceramic mass are proposed. The casting suspensions, structures and phase composition of products are described.
Kovrik S.I., Smychnik T.P., Lipskaya T.I.
Sedimentation of cupric and plumbous cations by peat-alkali suspensions. pp. 112--114
Summary: The amount of Cu+2 and Pb+2 cations sedimentated under the impact of peat-alkali suspension from solutions of their salts exceeds the stoichiometrically calculated one.
Agabekov V.E., Ariko N.G., Shlyashinskii R.G., Klyuev A.Yu., Kulevskaya I.V., Ivanova N.A., Shakhab S.N.
Effect of colophony esters on adhesive properties of undrying glue. pp. 115--117
Summary: Influence of the type of colophony esters used as adhesive additive to pressure-sensitive glue on adhesion strength of the sticky layer of light film polarizer for glass surface of liquide crystal indicator has been investigated.
Kordikov V.D., Eshchenko L.S., Shpakovskaya E.S.
Preparation and properties of anticorrosive pigments on the basis of iron-zinc phosphatic wasters. pp. 118--121
Summary: The chemical, phase and dispersion composition of phosphatic slurries formed during waste water purification of metal working factories is investigated. Conditions of anticorrosion pigment preparation on the basis of this slurry are determined. Protective properties of priming paint, obtained using iron-zinc phosphatic pigment are studied.
Bychek I.V., Kuzmenkov M.I., Kapitanova O.A.
Phosphate binder from wasters of leather production. pp. 122--125
Summary: Phosphate binder, which has been worked out, is based on ashes obtained by burning the chromium containing wasters of leather processing production. It is used as a binder component when thermostable and highly strengthened fireproof products are produced. The exploiting properties of this binder can compete with those of well-known aluminium chromium phosphate binder produced from technical raw material, the binding properties of the former even excel the latter.
Kol'nenkov V.P.
Distribution coefficients in simple ion exchange systems with n ³ 4. pp. 126--134
Summary: A method was developed for finding and description of the composition regions, in which ion exchanger equilibrated to solution shows preference to one, two, tree or more ions from their complex mixture. Diagram, which illustrates this differential preference for fourion exchange, is shown. Appropriate equations and systems of inequalities described this local regions are derived.
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