Весці Нац. акадэміі навук Беларусі. Сер. хім. навук, 2000, No.3
/ Выданні акадэміі / Навуковыя часопісы
Весці Нац. акадэміі навук Беларусі. Сер. хім. навук, 2000, No.3
| Весці Нацыянальнай акадэміі навук Беларусі
СЕРЫЯ ХІМІЧНЫХ НАВУКВыдавец: Беларуская навука, Мінск, Рэспубліка Беларусь |
Нумар 3, 2000
ЗМЕСТ
НЕАРГАНІЧНАЯ ХІМІЯ
Komarov V.S., Repina N.S.
Low-temperature method of acidic activation of clay. pp. 5--8
Summary: Low-temperature acidic method of montmorillonite clays activation has been considered for the first time. It has been shown that the obtained samples of activated clay and clay-oxide sorbents don't yield to that activated by acid using generally accepted method in their sorption characteristics. It has been noted the activation method proposed isn't connected with energetic expenditures being simple in apparatus and ecologically pure.
Levitskii I.A., Papko L.F.
Liquation distribution in multicomponent borosilicate glasses. pp. 9--12
Summary: The method of quantitative adaptation of electron microscopic data allows to reveal/principles of morphological changes and estimate kinetics of liquation distribution of multicomponent glaze glasses.
Rakhman'ko E. M., Yakimenko T.M., Tarazevich M.Ya., Yakimenko O.V.
Influence of solvent nature on anion-exchange extraction of platinum (IV) by trinonyloctadecyl ammonium chloride solution from chloride mediums. pp. 13--18
Summary: The influence of organic solvent nature on the anion-exchange extraction of platinum (IV) complex anion by quaternary ammonium salts (QAS) from chloride has been investigated. The maximum values of exchange constants are observed in the case of inert solvents. The processes of association of QAS in different solvents have been considered. The self-coordinate results have been received assuming dimerization of INODACI in toluene.
КАЛОІДНАЯ ХІМІЯ
Goncharik I.I., Mozheiko F.F., Golubovich S.A.
Influence of inorganic electrolytes on foamforming activity of solutions of sodium salts of fatty acids. pp. 19--22
Summary: Influence of sodium, potassium, calcium, magnesium, aluminium chlorides on foamforming activity of sodium salts of fatty acids (lauric, myristic, palmitic) has been studied. It has been shown the presence of inorganic electrolytes enhance foamforming and stability of foams formed.
ФІЗІЧНАЯ ХІМІЯ
Ogorodnikov V.A., Soldatov V.S., Shunkevich A.A., Oboturov A.V.
Sorption of zinc from water-salt solutions in dynamic regime on FIBAN K-4 fibrous ion-exchanger. pp. 23--27
Summary: Sorption processes of zinc ions on FIBAN K-4 fibrous carboxylic action-exchanger from solutions ZnSO4--Na2SO4--H2O, which were used as models of rayon plants effluents, are delt with. Zinc sorption dependence on solution flow rate through ion-exchange column, sodium sulfate and zinc ions concentrations has been investigated.
Kuvaeva Z.I., Bychkova V.A., Vodopyanova L.A., Zhavnerko L.B., Soldatov V.S.
Lysine extraction byliquid cation exchanger from water salt solutions. pp. 28--31
Summary: The effect of the solution pH and lysine concentration on its ion exchange extraction from 0.1 M NaCl solutions has been studied by a liquid cation exchanger (dinonyl naphtalene sulfonic acid dissolved in heptane). The extraction values have a maximum at the solution pH corresponding to predominant content Lys+ (pH 2.8).
Smychnik T.P., Dudarchik B.M., Skakovskii E.D.
Structural investigation of fraction of peat humic acids using 13CNMR spectroscopy. pp. 32--35
Summary: Using 13С NMR spectroscopy it was shown that the chemical constitution peculiarities of peat humic acids depend on the chemical composition of plant biopolymers and ecological conditions of peat formation.
Rudakova O. A., Chistyakova E.I., Zhukov V.K.
Influence of additions of oil soluble SAS on wax extraction process. pp. 36--37
Summary: Possible application of oil-soluble surface active substances for intensifying process of wax extraction is shown.
Malchenko S.N., Karkotsky G.F., Malchenko N.S., Rat'ko A.I.
Increasing oneelectrode gas sensor selectivity. pp. 38--43
Summary: It has been found that the shunting of metal heater by semiconductor layer is a necessary condition of function of the In2O3-based one-electrode semiconductor gas sensors (OESS). The correlation between the optimal consumed electrical power, resistance maximum and output signal of OESS to CO and CH4 has been discovered. The introduction of compounds of Bi, Ag and Н3PO4 in the semiconductor increases selectivity to these gases and results in increasing both maximum resistance and respective consumed electrical power.
Agabekov V.E., Shakhab S.N., Ivanova N.A., Ariko N.G.
Light-reflective coverings for film polarizers of transflective type. pp. 44--47
Summary: Light-reflective covering composition for transflective polarizers on the basis of dispersion the couting by titanum dioxide mica plates pigment in solusion of A-50T was developed. Transflective polarizer formed with that covering is comparable with foreign analogues for its optical and exploitational properties.
Kaputskii F.N., Mardykin V.P., Gaponik L.V., Lesnyak V.P., Kostyuk S.V.
Synthesis of aromatic hydrocarbon resins by cationic polymerization of C9-fraction. pp. 48--51
Summary: Cationic oligomerization of the C9- fraction was investigated to obtain main optimal parameters of aromatic hydrocarbon resins (AHR) synthesis. The dependence of AHR properties on C9-fraction preparation and conditions of oligomerization proceses was obtained. A number of active species of C9-fraction oligomerization was suggested. It was found that in the presence of the АlСl3 • OPh2 complex oligomerization is similar to the process with "living" chains. The variation of all studied in this work parameters of oligomerisation allows to synthesire AHR with given properties for the wide range of applications.
Egorov V.V., Rakhman'ko E.M., Rat'ko A.A., Konash A.V., Avlasevich Yu.S.
Anionselective electrodes based on metalloporphyrins. pp. 52--56
Summary: The selectivity of studied anionselective electrodes based on Co tetraphenylporhyrin substantially depends on the ratio of concentration metalloporphyrin:liquid ion exchanger in the membrane. The membranes based on "pure" metalloporphyrins are characterized by strong pH response excluding strong alkaline pH region. The incorporation of liquid ion exchanger into this membranes leads to appearance of wide plateau on potential-pH curves in acid region of pH, opening possibilities for using this tupe of membranes.
Dolgopalets V.I., Davydov V.Yu., Kisel M.A.
Inhibition of peroxide oxidation of lipids by stable nitroxide radicals based on stearic acid. pp. 57--61
Summary: Inhibition of Fe2+/ADP-induced peroxidation of rat liver phosphatidylcholine in liposomes by 4-, 7-, 12-, and 16-doxylstearic acids (DSA) was studied. It was found that the inhibitory effect of DSA's depends on the position of nitroxide radical on fatty acid chain being in the following order: 4-DSA > 7-DSA > 12-DSA > 16-DSA. 4-DSA acid inhibits the lipid peroxidation in the same extent as the natural antioxidant tocopherol. Amidation and esterification of 7-DSA resuites in decrease of its inhibitory effect.
АРГАНІЧНАЯ ХІМІЯ
Brilev V.V. †, Agabekov V.E., Tarasevich V.A., Vasilevski D.A., Makovetski K.M.
Catalytic oxidation of 4-hydroxy-4'-methylbiphenyl derivatives in acetic acid solution. pp. 62--65
Summary: 4-Pentyloxy- and 4-acetoxy-4'-biphenyl carboxylic acids have been prepared by liquid-phase oxidation of the appropriate derivatives of 4-hydroxy-4'-methylbiphenyl in the presence of three-component catalyst (Co, Mn, ZrO) promoted by NaBr in acetic acid with additives of acetic anhydride. The latter concentration should not be lower than the minimal ("critical") value which is slightly higher than of equimolar concentration of the substrate. A possibility has been shown to reuse acetic acid solution of the mixed Co-Mn-ZrO-bromide catalyst in the oxidation reaction.
Kuz'mitskii B.B., Kondratenkova E.M., Mashkovich A.E., Skupskaya R.V., Picus L.P., Bondar' N.F.
7-oxo-9,11-ethano-13-thiaprostanoids and their effect on gastroenteric tract. pp. 66--69
Summary: Experiments on female Vistar rats showed that some prostanoids, namely 7-oxo-ethano-13-thiaprostanoid I, II, V, administrated one hour before ethanol administrations (both the studied compound and ethanol were administrated per os) decreased the damage of stomach mucosa by 50-60%, though they displayed low cytogastroprotective activity in the model of acid indomethacin-induced acute ulcers in С3Н mice. As to the motor function of small intestine in mice, only prostanoid V enhanced this parameter. The highest non-specific protective effect (77%, p < 0.001) was registered after the administration of thiaprostanoid IX. Dicarboxylic analogue III increased the damaging action of acid indomethacin on stomach mucosa by 53%, with its protective effect in the model of ethanol-induced acute ulcers in rats being preserved.
БІЯАРГАНІЧНАЯ ХІМІЯ
Koroleva E.V., Katok Ya.M., Lakhvich F.A.
Synthesis of 11-deoxyprostaglandins analogues with cyclopentane fragment in w-chain. pp. 70--74
Summary: The synthesis of new 11-deoxyprostanoids with cyclopentane fragment in w-chain has been realized as a result of reaction sequence including nitrile oxide generation from nitromethyl derivative of 2-(w-carbmethoxyhexyl)-2-cyclopentene-1-one, its 1,3-cycloaddition to cyclopenten-1-one and reductive transformations of these cycloadducts.
Katok Ya.M., Lakhvich F.A., Koroleva E.V.
Synthesis of 11-deoxyprostaglandins Fa with bicycloheptane fragment in w-chain. pp. 75--78
Summary: The synthesis of new 11-deoxyprostanoids F1a with C14--C20-bicyclohepntane fragment in (w-chain has been realized by reductive transformations of 13,15-isoxazolinoprostanoids.
ХІМІЯ ВЫСОКАМАЛЕКУЛЯРНЫХ ЗЛУЧЭННЯЎ
Senkov G.M., Nikitina A.M., Gorbatsevich M.F., Chuiko V.A., Udarov B.G.
Turpentine isomerization on fibrous sulfocationite. pp. 79--82
Summary: The influence of reaction temperature on isomerization of a-pinen over sulfocationite has been investigated. The optimal temperature is 115 °C.
Valendo A.Ya., Nesterenok P.V., Voronova E.I., Ugolev I.I., Bogushevich S.E.
Formation of titanium-aluminium complexes in homogeneous system Cp2TiCl2-AlEt2Cl modified by diphenylmagnesium. pp. 83--85
Summary: Using ESR method it has been shown that the modification of homogeneous catalyst system Cp2TiCl2--AlEt2Cl by diphenylmagnesium leads to formation of complexes of Ti(III) with organoaluminium compounds, which are different from analogoes complexes forming in unmodified system and have two alkyl substituting groups at the aluminum atom in side position.
Transformation of complexes Cp2TiCL2AlR2 with bridge chlorine bonds to complexes Cp2TiClHAlR2 with bridge hydrogen atom has been observed with increasing modificator concentration.
ТЭХНІЧНАЯ ХІМІЯ І ХІМІЧНАЯ ТЭХНАЛОГІЯ
Tishin Yu.D., Snopkova T.A., Solov'eva T.V.
Influence of chemical composition of wood on strength properties of wood-mineral composition material. pp. 86--88
Summary: The comparative estimation of influence of the kind of wood filler kind, its separate components and extracts on strength properties of wood-mineral composite material on ordinary portlandcement and that modified by sulfoaluminate addition.
Shinkareva E.V., Tavgen V.V., Sonov Yu.G.
Oxidation of powdered chromium and features of its interaction with aluminachromiumphosphate binder at heating on air. pp. 89--92
Summary: The behaviour of powdered chromium and compositions based on it with aluminachromiumphosphate binders at heating on air in the temperature range from 500 to 1000 °C was investigated.
Stepanova L.I., Mozolevskaya T.V., Purovskaya O.G.
Electrochemical behaviour of nonstoichiometric copper sulfide in copper electrodeposition solutions of different composition. pp. 93--98
Summary: The results of detailed electrochemical investigation of nonstoichiometric copper sulfide films behaviour in different solution for copper electrodeposition are presented.
Statkevich S.A., Andreeva R.A., Abaev G.N.
Kinetics of organic wastes pyrolysis. pp. 99--104
Summary: A mathematical model of organic wastes pyrolysis is developed. Basing on the experimental data obtained kinetic constants of the process are designed. A computer variant of the reactionary knot model of wastes thermal destruction is developed. The possibility of fuel gas derivation from organic wastes in want of thermal autonomy of reactionary is shown.
Bogdanova V.V., Kobets O.I.
Development of flameproof compositions with required properties. pp. 105--108
Summary: The aim of this study was to develop ways of creating flameproof compositions for prevention of wood fires with a required set of properties. The comparative research of thermal, flamepro of and moisture-resistant properties of the individual flamepro of composition on the basis of nephelin modified by various quantities of finely divided silicon dioxide and same compositions put on sawdust was carried out.
Mozheiko F.F., Markin A.D., Shlomina L.F.
Influence of inorganic salts and their compositions with carbamide on lump formation of potassium chloride. pp. 109--111
Summary: The influence of some inorganic salts on lump formation of potassium chloride has been studied. It is shown that aluminium chloride and ferric chloride and their mixtures with carbamide are effective anti-lump formers of potassium chloride.
Lin D.G., Vorob'eva E.V.
Investigation of oxidative structurization of polyethylene films on metals. pp. 112--115
Summary: The rate of oxidative structurization and the maximal degree of crosslinking of macromolecules in polyethylene films oxidized in contact with copper are higher than that with aluminium. Obviously this is due to the catalitical copper compounds influence trasferred in polymer volume at contact oxidation.
Ivanova N.P., Bazhanova O.N., Zharskii I.M.
Electrochemical toning of nickel coverings. pp. 116--118
Summary: The condition of electrochemical way of getting the painted films of nickel coverings and chemical characteristics of films formed in different modes of electrolysis. The films toned in the pulsed mode of electrolysis have the best corrosion resistance
ФІЗІКА-ХІМІЧНЫЯ ПРАБЛЕМЫ ЭКАЛОГІІ
Zhigunova L.N., Dubova N.Ya., Pavlovich E.L., Petrovich A.V.
Investigation of distribution peculiarities of nitrocompounds precursors in milk. pp. 119--122
Summary: Season peculiarities of the nitrates and nitrites distribution as a careinogenic compounds redistribution in milk were studied in different districts of Gomel region of Belarus. Considerable part of probes has large quantity both of nitrates and nitrites. The average level of nitrates contamination was determined to be about 13.3 mg/kg, and that of nitrites -- about 0.16 mg/kg. It is pointed that the reglamentation of their contence in milk as precursors of nitrosocompounds is necessary.
/ Выданні акадэміі / Навуковыя часопісы / Да пачатку старонкі
Распрацавана і падтрымліваецца Мікалаем М. Касцюковічам. Апошняе абнаўленне: 21 лістапада 2006 г.
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