(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 |
Summary: Anodic oxide films obtained by conventional and microplasm anodizing of copper-containing aluminium alloy in sodium phosphate solution followed by thermal annealing within the range of 600--1200 °C have been studied using X-ray diffractometry and IR spectroscopy.
Radion E.V.
Copper (II) and cobalt (II) hydrolysis in nitrate soludon in joint presence. pp. 8--13
Summary: Investigation of copper (II) and cobalt (II) hydrolysis in joint presence has been carried out. It has been shown that during alkaline precipitation heteronuclear hydroxide precipitate forms. Cobalt however forced out from it in three hours. It has been established that only metal aquaions are in equilibrium with precipitate in Cu (II) -- Co (II) -- NO3- -- OH- -- H2O system. There is no interaction between copper (II) and cobalt (II) in the solution and in the precipitate.
Summary: The ion-metric technique for prozerine determination in farmaceuticals has been devised using membrane electrode with raised seleclivity relative to prozerine. This technique is comparable in precision with iodine-metric technique for prozerine determination and differs from the latter in quickness and lesser labour-intensiveness.
Zhebentyaev A.I., Zhernosek A.K.
Chemicoanalytical properties of fluorescent ethonium associates with halogen derivatives of fluorescein. pp. 18--24
Summary: Optimal extraction conditions, spectral characteristics and the composition of ethonium ionic associates with halogen derivatives of fluorescein (eosin, phloxin A, erythrosin, rose bengal A) are determined. Procedures for ethonium extractive-fluorimetric and extractive-hotometric determination are worked out.
Summary: Adsorption-structural characteristics of porous ferrite and ferrite-containing adsorbents prepared by including burning-out additives and by modifying structure of iron hydroxide being one of the spinel components are studied in the paper. Ferrites possessing higher sorption capacity are shown to be produced by increasing coaese-porosity of iron hydroxide and by acting burning-out additives. Similar relationship is observed during synthesis of ferrite-containing samples by using iron hydroxide.
Kaputsky F.N., Starobinets G.L., Yorkshtovich T.L, Bychkovsky P.M., Borshchenskaya T.I., Kudelko T.A.
Molecular sorption of spyrobromin- and prospidin chlorides by weakly acidic cation exchange resin KB-4n2(H) from water-ethanol solutions. pp. 29--32
Summary: The unexchangeable sorption of two anticancer substances -- chlorides of spyrobromin and prospidin by the weakly acidic cation exchange resin KB-4n2(H) at 293 ± 1 K from water -- ethanol solutions is well discribed by the equations of the stoichiometrical localized sorption theory.
Kaputsky F.N., Yurkshtovich T.L., Dranitsa V.V., Pechurova L.I., Zayats S.I., Butrim S.M.
Study on polysaccharide oxidation process by nitrogen oxide (IV). pp. 33--36
Summary: Some regularities of oxidation processes in starch, cellulose and amilopectin by N2O4 solutions in CCl4 have been studied. Selectivity of the oxidation process, in starch was shown to depend on N2O4 concentration in the indifferent organic solvent.
Aleksandrovich Kh.M., Mitina T.D., Dikhtievskaya L.V., Mozheiko F.F.
The influence of electrolytes on intermolecular interactions of ionic surfactants in solutions. pp. 37--40
Summary: Intermolecular interactions of surfactants and solvent in water -- salt solutions in connection with flotation of soluble salts have been described.
Zhdanovich I.B., Markin A.D., Mozheiko F.F.
The influence of dinatrium methylenebisnaphthalenesutfonate on structural and rheological properties of hydrochloroacidic octadecylamine solutlons. pp. 41--44
Summary: Chemical interaction of investigated substances used for flotation of potassium ores was shown to result in decreasing structural and rheological characteristics of their mixed solutions and reducing flotation froth stability.
Senkov G.M., Nikitina A.M., Gorbatsevich M.F., Yevgrashin V.M.
Lead- and iron influence on surface state of alumoplatinum catalyst modified by dysprosium and chromium. pp. 45--48
Summary: Desactivation of alumoplatinum catalyst modified by Dy, Cr and Pb and Fe additives leads to an increase in mean-strength acidic sites. Pb and Fe additives were concentrated on the external layer of investigated catalyst grains.
Radkevich V.Z., Savchits M.F., Paukshtis E.A., Yegiazarov Yu.G.
On formation of active phase in CO-oxidation copper zeolite-containing catalysts. pp. 48--53
Summary: The copper state was studied at different stages of CO-oxidation zeolite-containing catalyst preparation using the methods of diffuse reflection spectra, ESR, X-ray diffraction, IR-spectroscopy of adsorbed CO molecules. High activity of catalyst obtained by repeated ionic exchange was revealed to be due to scaling distribution of an active component representing a complex metal -- oxide system with Cu--Cu and Cu--O bonds in it.
Ignasheva O.E., Agabekov.V.E., Belyatsky V.N.
Modifcation of thermoevaporated thin films of benzo [a] phenoxazine derivatives by fluorine-containing plasmas. pp. 54--60
Summary: The effect of the fluorine-containing plasmas on the chemical structure and surface properties of vacuum deposited films based on benzo[a]phenoxazine derivatives has been studied. The possibility to form different hydrophobic film surfaces and to change film surface properties in a broad range depending on the type of plasma and the initial chemical structure of the compounds under investigation was shown.
Koktysh D.S., Rogach A.L., Belenkov V.V., Shifrina A.L., Rakhmanov S.K.
Silver halide photoemulsion microcrystal development as a conjugated redox process with nanogalvanic cell participation. pp. 60--63
Summary: It was shown that photolayer pre-development treatment by electrolyte solutions may result in a significant increase (twice and even more) of the X-ray film sensitivity to the action of ionizing radiation. This effect can be associated with the possibility of silver redistribution in the real photographic layer according to mechanism of electrochemically conjugated anodic and cathodic reactions of chemical development on silver particles forming nanogalvanic cells.
Summary: The (E)-4- [2-(9-arylmethyl-3-carbazolyl) ethenyl]-1- methylpyridinium salts have been synthesized by condensation of the 9-arylmethyl-3- formylcarbazoles with the 1,4-dimethylpyridinium salts.
Masalov N.V., Pritytskaya T.S., Kulinkovich O.G.
Synthesis and polymeraization of 3-(4-piperidinobutyl)- and 3-(4-morfolinobutyl) pyrrole. pp. 66--69
Summary: Synthesis of 3-(4-piperidinobutyl)- and 3-(4-morfolinobutyl) pyrrole based on the acylation of 1-(4-methylphenylsulfonyl)pyrrol is described. The electroconductive polymers soluble in water and polar organic solvents with conductivity (5--7) · 10-6 Sm · cm-1 are obtained by oxidative polymerization of produced monomers.
Summary: The possibility to form different complexes depending on the component ratio in a film, namely, polyvinyl alcohol (PVA), copper chloride, and orthophosphoric acid, is established. It is found that with the CuCl2 concentration of 2 to 7 mol.% the composites have the property of increased molecular mobility in the region of the alpha-relaxation process and sensitivity to water vapors. The films may be recommended as electrosensitive materials with maximal polarizability in the temperature ranges of 100--120 °C and 170--180 °C that change their geometric sizes due to water vapor sorption and an applied electric field.
Korshunova T.A., Mostovlyansky O.A.
The influence of thermal treatment on properties of microfiltration capron membranes. pp. 73--75
Summary: The influence of thermal treatment on the structural and mechanical properties of microfiltration capron membranes has been studied. It was shown that thermal treatment at 170 °C makes it possible to obtain membranes with more homogeneous and durable structure.
Summary: Radioactive spot morphology of the Volozhin District area and the reasons for mosaic of this pollution have been investigated. The tendencies of the secondary radionuclide redistribution were observed. The recommendations for reduction of the Chernobyl disaster consequences for national economy and local population are proposed.
Zivers Y., Kudelsky A.Y., Lukashev Y.K., Pashkevich Y.I., Sholts R.
Microelements in surface and underground water of central and south-easter Belarus. pp. 80--87
Summary: Surficial and underground waters in Pripyatskaya zone close to Chernobyl and in Sozhskaya remote zone affected by nuclear accident were analysed by ICP-MS technique for 44 chemical elements. The data were compared with underground waters of Minsk and European standard for potable water (1990).
Kuznetsov Y.A., Generalova Y.A.
Microelements, radioisotopes and the form of their occurence in buried Holocene soils. pp. 87--91
Summary: The common distribution of Sr-90, Mn, Cu, V, Cr, Ni, Co, Ti, Pb and their occurence forms in the buried Holocene soils are examined.
Summary: Essential differences in coagulation of humic acids of peat and sapropel which should be taken into consideration in using peat and sapropel raw materials were revealed as a result of investigation.
Shchurevich O.A., Lyubliner I.P.
Production and properties of phosphoroacidic ion exchanger on woodworking waste base. pp. 96--100
Summary: Properties of phosphoroacidic ion exchanger produced by chemical modification of woodworking waste -- sawdust were studied.
Klyuev A.Yu., Shlyashinsky R.G.
Production and investigation of properties of heat hafdenable varnishes. pp. 100--104
Summary: The influence of modifiers on the properties of Diels--Alder adducts-terpene hydrocarbons with maleic anhydride was studied. The physical-chemical properties of the composition of epoxy resin hardened with an adducts have been investigated.
Summary: The data on the nitrosodimethylamine precursors content -- dimethylamine and nitrogen dioxide -- in the atmosphere of Minsk, Gomel, Vetka and Svetlogorsk are presented. Regularities of their distribution in the atmosphere within a year cycle were investigated.
Summary: The article summarize the literature and patent materials concerning the methods of synthesis of aromatic hydrocarbon resins (AHR) employing the C9 fraction. It has been shown that there is lack of the universal method providing the simultaneous improvement of all the operation properties of AHR under consideration. The material collected in the article enables choice of the proper approach to modifying the AHR synthesis technique which properties suite to the requirements of different applications.
Summary: Beta-diketonates of dicyclopentadienyltitaniumchloride, (C5H5)2TiCl(RCOCHCOR'), R=R'=Me, R=R'=Ph, R=Me, R'=Ph, have been prepared by reactions of dicyclopentadienyltitaniumthienylchloride with corresponding beta-diketones or of dicyclopentadienyltitaniumdichloride with sodium beta-diketonates.
Yuvchenko A.P., Dikusar E.A., Zvereva T.D., Moiseichuk K.L.
Synthesis of peroxy containing esters of o-carboran-1-carboxylic acid. pp. 119--121
Summary: A method of synthesis of 3-methyl-3-tert.-butyl (pentyl) peroxy-1-[1-o-carboranoyloxycyclopenthyl (cyclohexyl)]- 1-butynes by the reaction of corresponding lithium peroxy alcoxides with chloroanhydride of o-carborane-1-carboxylic acid has been described.
Oparin D.A., Solodunov A.A.
Reaction between tetrafluoroborate 1-ethyltio-2-phenyl-4-n-chlorphenylphthalazine and diethylaminoesten. pp. 121--122
Summary: 1-[2-(indane-1,3-dione-2-ylidene)ethylidene] -2-phenyl-4-p-chlorphenyl-1,2-dihydrophthalazin was produced by the reaction of 1-ethylthio-2-phenyl- 4-p-chlorphenylphthalaziniumtetrafluoroborate with diethylaminoethen followed by the reaction mixture treatment with indane-1,3-dione.
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