(Vestsi Akademii Navuk Belarusi)
SERIES OF CHEMICAL SCIENCES
Published by The Belaruskaya Navuka Publishing House, Minsk, Republic of Belarus
| Proceedings of the Academy of Sciences of Belarus (Vestsi Akademii Navuk Belarusi) SERIES OF CHEMICAL SCIENCES Published by The Belaruskaya Navuka Publishing House, Minsk, Republic of Belarus |
Egorov V.V., Repin V.A., Lopatkina E.G.
Determination of physiologically active quarternary ammonium salts by the precipitating titration technique using ion selective electrodes. pp. 9--12
Summary: A possibility has been shown of a quantitative determination of 1,4-di[N-4-tolyl- 4-N-trimethylammoniumbenzyl) carboxamidobutane dibenzene sulfonate in a preparate as well as benzalkonium chloride in a desinfecting solution by the method of precepitation potentiometric titration using ion selective electrodes.
Kuvaeva Z.I., Vodopyanova L A., Mikulich A.V.
Study of triptophane and lizine transfer through impregnated liquid membrane. pp. 17--20
Summary: The mass transfer of tryptophane and lysin through am impregnated liquid membrane with strong acid has been investigated. Correlation between flux size and concentration, hydrodynamics and temperature parameters of the membrane system was shown.
Matveiko N.P., Zharskii I.M., Poplavskii V.V.
Peruliarities of electrochemical processes on the modified surface of niobium electrodes. pp. 20--23
Summary: Electrochemical processes of obtaining hydrogen and inorganic oxidants (Cl2; KIO3 and KNO3) on niobium electrodes modified by treatment with silicon and carbon have been investigated.
Bolotnikova E.V., Stepanova E.A., Ratko A.I.
m-Xylene isomerisation on zeolite containing catalysts based on phosphorous containing matrix. pp. 24--30
Summary: Effect of alumosilicate matrix modification with phosphoric acid on acidic, sorption-structural and catalytic properties of the matrixes and zeolyte containing catalysts based on TsVM has been investigated in the process of precipitation. A sharp change of sorption-structural and catalytic properties has been observed in the case of matrix with 1 wt.% of phosphorous. Interaction of the matrix with zeolyte has been noted to affect positively the selectivity and stability of catalysts in m-xylene isomerization.
Senkov G.M., Nikitina A.M., Gorbatsevich M.F., Sominski S.D.
IR spectroscopy investigation of platinum electronic state in platinum alumina catalyst with chromium, dysprosium, lead and iron additives. pp. 30--33
Summary: Modification of platinum alumina catalyst with Cr, Dy, Pb and Fe leads to changes in Pt electron state in the catalysts investigated.
Lishtvan I.I., Abramets A.M., Monich G.S., Guletskaya I.I., Kucheryavaya V.G.
Colloid-chemical properties of lignohumic acids. pp. 33--36
Summary: The results of investigation of solubility and colloid-chemical properties of lignohumic acids are presented. Lignohumic acids prepared on the base of hydrolysated lignin have been studied. The solubility and surface activity of lignohumic acids have been shown to continiously grow with pH increasing, while their adsorption on the hydrophobic surface of a solid phase is higher than that on the liquid--gas boundary.
Shevchuk V.V., Fedorov I.V.
Effect of emulsions of the first type on electrokinetic properties water suspensions of calcite arid graphite. pp. 36--39
Summary: The effect of "oil-water" emulsions stabilised by SAA of different types on electro-kinetic properties of calcite and graphite has been studied by microelectrophoresis technique. Modification of calcite and graphite suspensions by these emulsions causes z-potential change of mineral particles. The strongest change of z-potential has been observed in the case of a cationic emulsifier and at a low viscosity of the hydrocarbon phase.
Komarov V.S., Repina N.S., Bondarenko S.N.
Inorganic magnet-filled adsorbents. pp. 40--44
Summary: Effects of magnetic powders content and hydroxide porous structure on adsorption-structural properties of inorganic magnet-filled adsorbents have been studied. Sorption capacity and specific surface of the samples have been shown to decrease with increasing powder content in the composite, the magnetic characteristics being increasing. As for adsorption-structural properties of inorganic magnet-filled adsorbents, their adsorption capacity has been found to change readily in both directions. A mechanism of structure formation of hydroxides in the presence of the magnetic powder has been considered and the interpretation of the results obtained is given.
Komarov V.S., Repina N.S., Karpinchik E.V., Kosobutskaya N.F.
Effect of the electric field on a structure of co-precipitated hydroxides with paramagnetic and diamagnetic ions. pp. 44--49
Summary: Effect of electric field on co-precipitated adsorbents structure formation with participation of para- and diamagnetic ions has been studied. It has been shown that adsorbents with more small pores are formed while tension of electric fiels increases. Radius of the pores changes linearily depending on Bohr magneton of the ions. A slope of the curves Bohr magneton -- reff (A°) to the axis of abscissae is determined by the Bohr magneton value of ion mixture. The interpretation of the experimental results is given and a mechanism of a structure formation of the adsorbents prepared in the presence of paramagnetic ions has been revealed.
Titov V.P., Yakubovskaya S.V., Berezutskii S.S., Filimonov V.A.
Proton mobility in crystalline titanium phosphates. pp. 49--53
Summary: Proton mobility in a- and g-crystalline titanium hydrophosphates has been studied in the temperature range from 20 to 5500 °C. Crystalline titanium hydrophosphates have been found to possess a rather high conductivity up to condensation temperature of the acidic orthophosphate groups. A mechanism of proton conductivity has been discussed based on crystalline structure of titanium hydrophosphates.
Goikhman A.Sh.†, Grinshpan D.D., Lushchik L.G.
Crystalline structure of cellulose precipitated from its solutions in zinc chloride. pp. 53--57
Summary: Changes in the crystalline structure of cellulose regenerated from its solutions in zinc chloride and from crystalsolvates formed in these solutions have been investigated by X-ray diffraction method. Two structure parameters -- a crystal lattice type and a cellulose crystallinity degree -- have been estimated using computer programme taking into account change in an amorphous structure. It has been shown that during precipitation of cellulose from its solutions in zinc chloride cellulose II modification is formed, while the cellulose precipitated from crystalsolvates has IV modification. In the both cases a sharp reduction of a cellulose crystallinity degree has been observed.
Matys V.G., Zharskii I.M., Matveiko N.P., Poplavskii V.V.
Effect of underlayer nature on activity of composite electrodes based on titanium in reaction of cathodic hydrogen evolution. pp. 57--62
Summary: The electrochemical behaviour of complex electrode system based on titanium has been studied in the reaction of cathode hydrogen evolution. Titanium plates with two layer coverings consisting of electrocatalitically active platinum-containing working layer and a transient layer preventing corrosion distruction or passivation of the electrode during anode polarisation were investigated. Parameters of hydrogen evolution reaction have been calculated from cathode polarisation curves taking into account ohmic loss in the electrolyte and the electrode. A conclusion has been made based on the calculations that electrode material resistance must be taken into consideration both during composite covering formation and properties interpretation of the electrodes produced.
Stepanova E.A., Ratko A.J.
Cracing of n-hexane on zeolite-containing catalysts based on HTsVM and pillared clay. pp. 62--67
Summary: This paper is devoted with the catalytic activity of zeolite-containing catalysts on the base of zeolite HTsVM and pillared clay in cracking of n-hexane at 300--4500 °C and atmospheric pressure. It has been shown the most cracking activity display sample which includes montmorillonite matrix modified aluminium oligomer cations in conjunction with phosphate ions. It has been established that the degree of n-hexane conversion correlate well with the value of Brensted aciolity of the obtained catalysts.
Chuiko V.A., Manukov E.N., Yaremchenko N.G.
Solvolysis of dibromocarbene adduct of 3-carene. pp. 70--72
Summary: 4-Bromo-3-methoxy-3, 8, 8-trimethylbicyclo[5.1.0]oct-4-ene, 4-bromo-5-methoxy-3, 8, 8-trimethylbicyclo[5.1.0]oct-3-ene, 4-bromomethylene-3-methoxy-3, 7, 7-trimethylbicyclo[4.1.0]heptane have been shown to be methanolysis products of 4, 4-dibromo-3-methoxy-3, 8, 8-trimethyltricyclo [5.1.0.03.5]octane.
Kuzmitskii B.B., Bondar N.F., Mashkovich A.E., Nasek V.M., Romanova V.N., Lachvich F.A.
Effect of a structure modification on citoprotector activity of 7-oxo-9,11-ethanoprostanoids. pp. 80--83
Summary: The carbocyclic PGH analogues with modified chains have been shown to affect positively trombocite membrane decreasing a degree of induced aggregation of blood plates while slightly influence erythrocyte resistance to acidic haemolysator. A substitution of alkyl omega-chain by isoxazolylimidazole group is one of the perspective modifying factors. Most of 7,13-dioxo-9,11-ethanoprostanoids stimulate a release of allergic mediator of an instance type from the mass cells. This fact permits for the corresponding effects to be predicted in the case of their using as potential medicines.
Kuznetsov V.A., Generalova V.A., Kolnenkov V.P.
Dynamics of technogenic radionuclides in river valleys: the experience of radiogeochemical landscape monitoring. pp. 90--93
Summary: The results of monitoring in river valleys based on the facial approach and with reference to geochemical differenciation in alluvial processes and pedogenesices are given. The task is formulated to study geochemical processes dealing with a landscape self purification from radiactive pollution.
Savchenko V.V., Gurch E.P., Savchenko S.V.
Peruliarities of technophilic elements distribution in alluvial ecosystems of Belarus. pp. 93--100
Summary: The investigation of lateral and vertical distribution of Cr, Ni, Ph, Cu, Zn, Mo, Co, V, Mn, Ba, Ti, Zr, Sn, Ag in alluvial soils and floodland motley grass of the 120 km section of Svisloch river downstream of the Minsk City has been carried out. The data of the similar study of the control area, 110 km section of Berezina River draining the biosphere reserve are given for a comparison reason. According to the study the lateral distribution of anomalous metals across the floodplain varies essentially depending on a number of factors such as a nature of primary anthropogenic source, previous dispersion history of the anomalous constituents, a geomorphological level, a distance from the river bed and local conditions, etc. The vertical distribution is not homogeneous. A stepwise decrease of Cr, Cu, Zn, Ni, Sn, Ag, Mo concentration from the top layer down to the lowest layer may be explained in terms of the recent intensity of pollutions (40--50 years) and effect of a biogeochemical barrier.
Belous N.Kh., Samuskcvich V.V., Stukalenko A.A.
Effect of solidification conditions of copper-phosphate binder on composition and properties of the cement stone formed. pp. 104--107
Summary: The influence of hardening conditions of binder, containing copper phosphate, upon composition and properties of formed cement stone was studied. The variation limits of the studied parameters allowing optimization of operational characteristics of the material have been determined.
Koktysh D.S., Mamedov A, A., Korzun G.M., Belenkov V.V., Rakhmanov S.K.
Effeciency of antifoggants in the modified chemical development. pp. 108--111
Summary: A joint using of antifoggants of different chemical nature in the modified development of the X-ray medical film has been studied. The action of two antifoggants mixture in the developing solution as compared to the individual compounds has been shown to be more effective due to formation of silver organic salts of different solubility in the depth and on the surface of a photolayer.
Zilbergleit M.A., Kebich M.S., Gorbatenko I.V., Fedorova O.I.
Effect of a forced aeration on bioconversion rate of wood components. pp. 111--115
Summary: The effeciency of a forced aeration on the processes of destruction and humification of a wood substance has been shown. The influence of N-containing salt cation nature on a formation rate and a yield of humic substances has been investigated.
Buinova I.F. †, Solntsev A.P., Volozhin A.I.
Synthesis of diterpene imidocarboxylic acids. pp. 118--119
Summary: The method of diterpene imidocarboxylic acids preparation has been described on the example of N-(p-carboxyphenyl)imide of maleopimaric acid synthesis. The method proposed permits for the products of high purity to be obtained quantitatively and in a one step. Six previously unknown compounds have been synthesized.
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