(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: The results of dilatometrical, thermographical and X-ray investigations of the conditions of Bi2Ti4O11 compound formation are presented. The many-staged character of the compound formation process has been shown. A temperature of this compound formation has been determined.
Gorbunova V.A., Novikov G.I., Gamanovich N.M.
A promising fuel for high-temperature fuel cell. pp. 9--11
Summary: Experimental data are presented of the processes of electrochemical oxidation of gaseous fuels based on CH4, NH3 C2H5OH and on products of partial burning (containing CO and H2) of industrial carbon fuels in high-temperature solid electrolyte fuel cell (HTFC). Some problems of HTFC performance optimization are considered.
Summary: Interaction of oil-in-water emulsions stabilized by various surfactants with a calcite surface has been examined by IR-spectroscopy.
Summary: An effect of iron (III) species in aqueous solution on its spectrophotometrical determination using sulphosalisylic acid has been investigated. If iron is in a form of polynuclear hydroxocomplexes in aqueous solution a formation of its complex with sulphosalisylate in alkaline media is shown to be process, so an analytical determination of iron in such a solution is complicated. It has been also shown that destruction of polynuclear hydroxocomlexes by acidifying offers obtaining true value of iron (III) concentration in a solution. In the presence of sulphosalisylic acid the hydroxocomlexes destruction process is accelerated substantially in a solution.
Summary: A behavior of anion-exchange extraction of halogenide complexes platinum (IV) by quaternary ammonium salts (QAS) from chloride and bromide media and film anion-selective electrodes (ISE) based on higher quaternary ammonium salts has been investigated. An effect of concentration of all the reagents and other factors on extraction has been studies and conditional exchange constants have been determined.
Petkevich T.S., Senko T.L., Berezovik G.K., Egiazarov Yu.G.
Effect of reaction products on isopropyl alcohol dehydration on fibrous sulfocationite FIBAN-1. pp. 24--28
Summary: A pulse technique has been applied to study a reaction of 2-propanol dehydration over FIBAN sulfonic acid cation exchangers. Propen has been shown to have no effect on the reaction, while water influenced substantially depending on its concentration in FIBAN sulfonic acid cation exchangers. The kinetics at a hige water content indicate a carbonium ion mechanism and in the case of low water content a concerted mechanism is observed.
Shevchenko G.P., Bokshits Yu.V., Sviridov V.V.
Influence of hydrogen peroxide on optical properties of a silver sol. pp. 29--32
Summary: Effect of H2O2 on optical properties of silver sols has been investigated. This effect was found to be associated with the changes in a size, a shape and a morphology of silver particles in the initial sol due to redox-reactions resulting, on the one hand, in the silver dispersed up to subcolloidal sizes and, on the other hand, in the particle growth and crystallization.
Agabekov V.E., Shutova T.G., Butovskaya G.V.
Peculiarities of thermal and photo-transformation of the surface layers of thin films of 3-methyl-3-tert-butylperoxy-l-butynylsilver. pp. 33--37
Summary: Peculiarities of thermal and photo-transformation of the surface layers of thin films of 3-methyl-3-tert-butylperoxy-l-butynylsilver and thermal transformation of its powder and melt have been studied by X-ray photoelectron spectroscopy. Oxidation processes with participation of oxygen adsorbed on the surface as well as processes of gaseous and low-boiling products formation have been shown to play a substantial role in the surface layers of the films.
Kaputskii F.N., Yurkshtovich T.L., Starobinets G.L., Bychkovskii P.M.
Sorption of some biologically active electrolytes by carboxylic cation-exchanger. pp. 38--42
Summary: Sorption of three anticancer electrolytes: chlorides of spyrobromin and prospydin and bromide of oxythiamin from water on two carboxylic cation-exchanger in H+-form -- MKO end KB-4 has been investigated and described by an analog of Langmuirs equation. The sorption parameters of the process and Gibbs energy of sorption has been calculated. The reduction of their sizes at transition from MKO to KB-4 is explained. The energy decrease of hydrophobic interactions at transition from spyrobromin and prospydin to oxythiamin is accompanied by strong increase of mobility the latter in a phase of MKO, that confirmed by measurements of effective diffusion coefficient and their release from the cation-exchanger phase.
Goncharik I.I., Mozheiko F.F., Golubovich S.A.
An effect of associate formation on foamforming ability of compositions based on salts of aliphatic amines and carboxylic acids. pp. 43--47
Summary: An associate formation between sodium salts of carboxylic acids and hexadecy ammonium chloride has been proved. Foamforming ability of the soluble associates is substantially higher than that of the initial components.
Maksimuk Yu.V., Trakhanov P.K.
Additivity of standard enthalpies of formation of benzoyl carboxylic acids and their methyl esters in a gas phase. pp. 48--52
Summary: A procedure of additive calculation of standard enthalpies of benzene derivatives formation has been suggested based on increment-replacement scheme taking into account ortho- and connected ortho-interactions. The values of additive parameters for methylbenzenes, benzenecarboxylic acids and their methyl esters (48 compounds) are obtained by the least squares method. The calculated sized DfH0m (298.15, g) are in a good agreement with these experimental (± 2.4 kJ/mol).
Aleksandrovich Kh.M.
A modifying effect of cationic polyelectrolytes on clay-salt dispersions. pp. 53--56
Summary: A modifying effect of cation-active polyelectrolytes based on copolymers of polyvinyl benzene and naphthalene on clay-salt dispersions in salt solutions has been studied and these polyelectrolytes show promise as agents for potassium ores flotation.
Komarov V.S., Repina N.S., Rabenok M.G.
Effect of ultrasound and vibration on iron and magnesium hydroxide structure. pp. 57--60
Summary: An effect of ultrasound and vibration on a formation of pore structure of iron and magnesium hydroxides has been studied. A form of hydroxides particles and their crystallization degree have been shown to play a great role in a process of a structure formation. It has been stated that the ultrasound treatment effectively influence an increase of sample specific surface, and the vibration treatment effects substantially a sample growth and their sorption capacity. Structural changes data for the hydroxides has been explained in terms of a theory and a mechanism of the changes has been revealed.
Jiang Xiao Hong, Proleskovsky Yu.A.
A comparative evaluation of the methods of water activity estimation in natural brines of the Pripyat valley. pp. 61--65
Summary: In this paper the methods of water activity estimation in a mixture system of strong electrolytes have been compared. An optimal variant of the water activity determination for the system of the natural brines of the Pripyat valley has been discussed.
Kenigsberg T.P., Monakhova O.B., Agabekov V.E.
Properties of monomolecular layers and their Langmuir-Blodgett films of cellulose acetates. pp. 66--71
Summary: Molecular, structural and optical properties of mono- and multilayer films of di- and triacetate cellulose on water and aqueous solution of J2, CdJ2, CdCl2, BaCl2 have been studied. The surfactant has been shown to be absorbed on the polymer molecules. J2 plays a role of an inner plastizer and facilitates multilaers formation.
Summary: Porcine proisulin has been isolated from a secondary fraction of the industrial process of insulin purification. The native prohormone and its damaged molecular form with the cleavaged Arg63-Gly64 bond prevailed in the isolated preparation. According to the quality gradation accepted in immunoassay technology the purified proinsulin met the following requirements: suitable for labelling, immunizaition and standard preparation. Murine monoclonal antibodies to proinsulin have been obtained and characterized. A purified product of one of the clones was immobilized on CNBr-activated Sepharose. An interaction of the isolated proinsulin and the prohormone in insulin fractions with the immunoaffinity column has been studied. In principle, the possibility was shown for contaminant proinsulin to be completely removed from commercial insulin preparations by immunoaffinic chromatography.
Kalinichenko E.N.
An effect of 3'-fluorin-3'dezoxy analogues of trimer of (2'-5')oligoadenyl acid on fagocital activity of macrofags: stereochemical aspect. pp. 79--84
Summary: The influence of 5'-triphosphorylated fluoro-3'-deoxyanalogs of 2-5A and its 5'-dephosphorylated derivatives on phagocytosis of macrophages, using mouse macrophage-like cell line P388D1 was investigated. In summary, we have demonstrated that 3'-fluoro-3'-deoxy analogs of 2-5A and 2-5A core enhanced the phagocytic chemiluminescence. The conformational features of the sugarphospate backbone play the important role in the binding fluorodeoxy analogs with p3A3 receptor. The 2-5A-receptor exists on the mouse macrophage like cell line P388D1 and includes two binding sites with the dissociation constants Kd1 and Kd2 at about 4•10-7 M and 1.4•10-9 M, respectively. The conclusion can be drawn that 2-5A-receptor prefers a trimer in the S-conformation of sugar fragments. Luminil-dependent chemiluminescent analysis was used to study the influence of oligomers on the zymosan-induced phagocytosis of P388D1 cells.
Dolgopalets V.I., Kisel M.A., Kulinkovich O.G.
Synthesis of fatty acid containing reporter and photoactive groups in terminal region of fatty acid chains. pp. 85--88
Summary: A versatile approach to synthesis of stearic acid analogues containing both reporter and photoactive groups in terminal region of fatty acid residues is described. As a key compound in the synthesis, 16-heptadecenoic acid has been used. 17,18-Dibromostearic acid (fluorescence quencher), 16-doxylstearic acid (spin probe), and 16-azidostearic acid (photoactive label) have been prepared by use of this approach.
Summary: A method for enzyme-linked immunosorbent assay of human chorionic gonadotropin have been developed. Monoclonal antibody to a-hCG was conjugated with horseradish peroxidase and MAb to b-hCG was covalently coupled to formylated polystyrene macroformats. The antigen's working range is 5 to 2000 IU/L. Coefficients of variation were < 2%.
Summary: Regularities of K-40 distribution in soil mantle of Belarus and radiogeochemical map are given.
Strakh L.I., Ivashkevich I.I.
Geochemical barriers of a marginal area of the marshes of Polesje. pp. 98--102
Summary: Analysis of landscape-geochemical particularities of catena mortgaged on the fringe of cross-section marsh allowed to select a barrier geosystem in the marginal area of marsh. This geosystem is an independent element of a landscape-geochemical structure of catena and demonstrates characteristics of the complex geochemical barrier. The associations of elements concentrated on geochemical barriers of one type and diffused on barriers of other type spatially combined with them have been chosen. The phenomena of barrier geochemical inversion have been found.
Summary: A degree of nitrone C alkaline hydrolysis has been established to be higher than that of nitrone D under the same conditions. A chemical nature of an alkali has no effect on a ratio of carboxylate and amide groups of a water soluble copolymer formed, being simultaneously a determining factor for a viscosity value.
Egorov A. I., Rogachev A.V., Kazachenko V.P.
Duffusion processes during polyethyleneterephthalate film dyeing in active gas phase. pp. 106--108
Summary: Peculiarities of phtalocyanines and dispersed dyes diffusion in polyethyleneterephthalate film during its processing in a gas phase have been determined. The values of diffusion coefficient and activation energy in a temperature range 90-180 °C have been obtained.
Smychnik L.Yu., Dudarchik V.M.
Effect of hydrogen peroxide on destruction of humic acid fractions of peat. pp. 109--112
Summary: It was shown that stability of humic acid fractions depends on the degree of their chemical maturity and geobotanic nature of the corresponding peats.
Orobei N.V., Tretyak A.N., Novikov G.I.
Production of fluorosilicates from waste products of glassware manufacture. pp. 113--115
Summary: A possibility has been shown to produce commercially pure hexafluorosilicates from fluorine-containing waste products of glassware manufacture.
Ogorodnikov V.A., Soldatov V.S., Shunkevich A.A.
Zinc sorption by fibrous carboxylic cation-exchanger from a model solutions of viscose ryon manufacture effluents. pp. 116--119
Summary: Processes have been studied of zinc ions sorption on FIBAN K-4 fibrous carboxylic acid cation-exchanger from solutions of ZnSO4- Na2SO4- H2O used as model ones of viscose rayon manufacture effluents. A study of zinc sorption from solutions containing 0.025 g/l Zn2+ and 2 g/l Na2SO4 by a column technique at a flow rate 10.0 ml/min (8.84 ml/cm2 min) has shown that breakthrough dynamic capacity of the ion-exchanger increases with pH of the solution. Breakthrough curves of zinc obtained at pH in the range of 5.5-7.5 show slight deterioration of zinc sorption dynamics at pH = 7.5. Nevertheless, zinc-containing alkaline solutions have been found to be the most preferable ones for zinc sorption due to a high sorption ability of the ion-exchanger at pH > 7.
Galai E.I.
Mobility regulation of nature brines with peat additives. pp. 120--123
Summary: Changes of acidity, sorption capacity as well as resistivity of a peat solution under the action of brines have been determined. A sorption value of peat in brines has been calculated. A concentration of brines in peat soils at which a salt migration is reduced has been revealed.
Elshin A.I., Vegera A.I.
Potable water purification using a system prefilter-cross-flow membrane module. pp. 124--128
Summary: The subject of the work was the efficiency investigation of system prefiltercross-flow membrane module for potable water purification. The knitted filter media "PTTF" was used as prefilter for ultra- and microfiltration membranes. Experimental data show an increase of membrane module output when PTTF filter is used. Membrane module average output growth has a tendency to exponential increasing with increasing of filtrate volume for microfiltration membrane. For ultrafiltration membrane the output growth in the range of 15-20% was observed while for microfiltration membrane it was in the range 50-150%.
Sereda T.G.
Biochemical purification of drainage water on landfillings of urban ore. pp. 129--133
Summary: Biochemical purification of drainage water (leachant) of urban ore has been studied using a monoculture of aquatic plants Riccia and pre-treatment of the leachant with 1% solution of Ca(OH)2 to pH from 9.0 to 9.5.
Lishtvan I.I., Lesnikovich A.I., Komarov V.S., et al.
Kaputskii Fedor Nikolaevich (To 70th anniversary). pp. 136--137
Click here to read this article in Russian (Win1251)
Komarov V.S., Sviridov V.V., Lishtvan I.I., et al.
Ermolenko Nikolai Fedotovich (To 100th anniversary). pp. 138--141
Click here to read this article in Russian (Win1251)
 Academy |