Известия Нац. академии наук Беларуси. Сер. хим. наук 2001, No.1
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Известия Нац. академии наук Беларуси. Сер. хим. наук 2001, No.1
| Известия Национальной академии наук Беларуси
СЕРИЯ ХИМИЧЕСКИХ НАУКИздатель: Беларуская навука, Минск, Республика Беларусь |
Номер 1, 2001
СОДЕРЖАНИЕ
НЕОРГАНИЧЕСКАЯ ХИМИЯ
Murashkevich A.N., Kunitskaya O.M., Zharskii I.M.
Interaction of calcium carbonate with fluorosilicic acid. pp. 5--11.
Summary: It is shown that the interaction of fluorosilicic acid with calcium carbonate in the temperature interval of 2--40 °C with the initial acid concentrations 0.14--7.0 wt.% is controlled by diffusion factors Optimal conditions which provide the full pass of the reaction are determined and the possibility of dividing the dispersion system components is shown.
Zyk V.V., Galieva Zh.N.
Preparation of oxides of rareearth elements from extract solutions of phosphogipsum. pp. 12--14.
Summary: Possible application of the extract method for isolating the rare earth elements from extract solutions of phosphogipsum is demonstrated.
Belous N.Kh., Samuskevich V.V.
Influence of calcium phosphate binder composition on its physical chemical characteristics. pp. 15--18.
Summary: The influence of the composition of the calcium phosphate binder on its physical mechanical characteristics was investigated by methods mathematical planning. The mathematical models that allow to predict properties of cements in the investigated area of compositions and also to make some general conclusions about influence of various factors on these properties are obtained.
КОЛЛОИДНАЯ ХИМИЯ
Bokshits Yu.V. Shevchenko G.P., Sviridov V.V.
Preparation of Ag-Cu colloidal particles by electroless deposition in water solution. pp. 19--23.
Summary: The possibility to form bimetallic Ag--Cu particles with different structure has been found by electroless deposition in aqueous solution. It was shown that particle size, size distribution and time behavior of their optical properties strongly depend on the structure of particles formed and on the conditions of particle deposition.
Komarov V.S., Repina N.S., Rabenok M.G.
Influence of ultrasound and vibration of on structure formation aluminium and ferric in the presence of electrolyte. pp. 24--27.
Summary: The mechanism of structure formation of aluminum and ferric hydroxides treated by vibration and ultrasound in the presence of electrolyte has been disclosed. The action of these physical and chemical factors directed mainly to enhance of specific surface of obtain samples has been explained from point of view of colloid chemistry.
In spite of various sized particle of initial and treated samples the changing of sorption capacity is less visible obviously because of similar charts f volume packing of their particles.
ФИЗИЧЕСКАЯ ХИМИЯ
Shevchenko G.P., Serezhkina S.V., Potapenko L.T., Sviridov V.V.
Regularities of ultrafine germanium formation by sol-gel method. pp. 28--31.
Summary: Various methods were used for the formation of stable germanium dioxide sols. Nanostructured germanium films were prepared by reduction of GeO2-layers formed on the base of such sols and their properties have been studied.
Teluschenko E.A., Kopylovich M.N., Baev A.K.
Constants of stability of Cr (III) and Ni (II) hydroxocomplexes from data of potentiometric titration. pp. 32--37.
Summary: A new method of quantitative evaluation of stability of hydroxocomplexes in aqueous solutions based on potentiometric titration was proposed. An optimal variant of its carrying out was established. Several thermodynamic parameters of stability of polynuclear hydroxocomplexes of Cr3+, Ni2+ and Cr3+-Ni2+ were determined.
Maksimuk Yu.V. Kozyro A.A. †, Kabo G.Ya., Sokolov V.D.
Thermodynamic propertties of bis (2-hydroxyethyl)terephthalate. pp. 38--41.
Summary: The thermodynamic functions of bis (2-hydroxyethyl)terephthalate were obtained by calorimetric methods in the temperature range 5--500 K. The thermodynamic analysis of transesterification of dimethyl terephthalate with ethylene glycol was made for different temperatures and phases of reagents.
Kenigsberg T.P., Agabekov V.E., Monakhova O.B.
Subphase influence on properties of Langmuir-Blodgett films of polyvinylbenzals. pp. 42--45.
Summary: Mechanical, optical, structural and thermal properties of Langmuir--Blodgett films of polyvinyl alcohol derivatives and their changes in consequence of modification of polymer molecules in monolayer by J2, CdJ2 and CdCl2 are investigated.
Savitskaya T.A., Pashkevich T.N., Kulinkovich O.G.
Swell of thermally sensitive poly-N-isopropylacrylamidic hydrogels in water-organic media. pp. 46--49.
Summary: It is found that, as the ratio of components in the temperature field lower that LCST of P-N-IPAA changes, reentrant phase transition is observed in the mixtures of water with ethanol, prophan-1-ol, prophan-2-ol, ethyleneglycol, butan-1,3-diol, butan-1,4-diol, except for water--glycerol one. In water--glycerol mixtures the gel undergoes a discontinuous collapsing. 10--20% additives of all the studied solvents and mainly glycerol were demonstrated to reduce the temperature of the phase transition. The largest reduction of the phase transition temperature correlates with the essential difference between solubility parameters of P-N-IPAA and glycerol.
Kaputskii F.N., Bychkovskii P.M., Yurkshtovich T.L., Starobinets G.L.
Comprative estimation of influence of solvatophobic ettects on nonexchange sorption of some organic electrolytes by carboxylic ion-exchangers from water-ethanol solutions. pp. 50--54.
Summary: Molecular sorption of three organic electrolytes by two carboxylic ion-exchangers from a binary system water-ethanol in a wide range of composition has been investigated. It is established that in all cases at N2 (0.3 (N2 -- molar fraction of ethanol) the sorption equilibrium is displaced to direction of the binary solution, what is explained by microscopical demixture of the binary solution and interaction of hydrophobic radicals of electrolytes with hydrophobic microphase of the binary solution.
БИООРГАНИЧЕСКАЯ ХИМИЯ
Kuz'mitskii B.B., Konoplya N.A., Lyubin G.S., Koroleva E.V., Katok Ya.M., Chernikhova T.V.
Synthesis and immunotropic activity of prostanoids containing heterocyclic and carbocyclic fragments in w-chain. pp. 55--59.
Summary: To estimate structure-function relationships as well as to find promising immunomodulators among synthetic prostaglndin analogoes, we studied immunotropic activities of a number of new synthesized prostanoids containing hetero- and carbocyclic fragments in w-chain.
It was revealed that most of the studied compounds, administrated at saturation doses (1--5 µ g/kg) per os, stimulated humoral immunity in CBA mice immunized with sheep red blood cells (SRBS) (1.5 • 107 SRBC per a mouse intraperitoneally).
The largest immunoenhancing activity was displayed by the compound characterized by the presense of 13-oxo-15-hydroxy, 15-pyridilic fragment in w-chain combined with native carbmcthoxialcylic w-chain. This compound induced 2.5-fold increase in antibody-cell accumulation in the spleen of the immunized animals.
Makarenko M.V., Shcherban' A.I.
Optimization of the chloramine T method for radioiodinalion of prostatic acid phosphatase. pp. 60--62.
Summary: Optimal conditions tor preparation of |125I|-labelled human prostatic acid phosphatasc (PAP) by chloraminc T method were developed, which make it possible to increase the radiochemical yield and immunorcactivity of labelled PAP. The influence of buffer systems, pH of reaction mixture and molarity of borate buffer was investigated. Iodination in 0.2 M borate buffer, pH 8.0 make it possible to prepare |125I|-PAP with 90-98% immunorcactivity. Under storage of labelled PAP during 2 month immunorcactivity is decreased only by 10%. On the base of prepared |125I|-PAP high-sensitive competitive radioimmunoassay of PAP in human scrum have developed.
Survilo L.I., Kiseleva E.P., Vashkevich I.I., Sviridov O.V., Demidchik E.P., Strel'chonok O.A.
A radioimmunological analytical system for thyroid peroxidase determination in biological tissue extracts. pp. 63--67.
Summary: An analytical system for radioimmunological determination of human thyroid peroxidase (TPO) has been developed for the first time. This system includes lyophilised preparations of human autoantibodies to TPO, radioiodinated TPO. standards prepared with the use of pure TPO and immobilized protein A as a solid phase precipitating agent. The specific binding of |125I|TPO in the system accounts for 35-40%, the non-specific binding of the radioactive label do not exceed 5%. TPO is accurately determined in a concentration range 8 to 1000 microgram/l, and the total analysis takes 3 h. The procedure and reagents developed can be applied in a technology of TPO isolation and purification from thyroid tissue extracts, that is intended for immunoanalytical kits production.
ХИМИЯ ВЫСОКОМОЛЕКУЛЯРНЫХ СОЕДИНЕНИЙ
Komar' V.V., Kalinina N.Yu.
Influence of zinc stearate on properties of epoxy-polyester powder compositions. pp. 68--71.
Summary: We demonstrate the possibility of regulating the process of structurization and controlling the reological properties of powder epoxy-polyester compositions at mechanoactivation with modificator zinc stearate.
Siderko V.M., Raiman M.V., Epshtein O.L., Kulinkovich O.G.
Synthesis of copolymers of N-isopropylacrylamide with hydrophobic and hydrophilic monomers and properties of their solutions. pp. 72--74.
Summary: Series of copolymers of N-isopropylacrylamide with varying content of vinyl heptadecyl ketone and b-(N-acryloylaminoethyl) triethyl ammonium iodide units in polymer chains were prepared by radical copolymerization. The cloud point dependence on composition and concentration of copolymer in aqueous media and on composition of water-organic liquid mixtures has been studied.
ТЕХНИЧЕСКАЯ ХИМИЯ И ХИМИЧЕСКАЯ ТЕХНОЛОГИЯ
Levitsky I.A., Pavlyukevich Yu.G., Radchenko Yu.S., Aksamentova N.V.
Phase-structural transformation in basic magmatic rocks uder heating. pp. 75--80.
Summary: The phase and structural peculiarities, have been studied of thermal transformations of basic magmatic rocks of the Republic of Belarus. The information obtained can be used as a base of structural and controlled synthesis of artificial silicate materials.
Khripovich A.A.
Interaction- of carbohydrates and nitrous compounds of different structure in alkaline medium with melanoidins formation. pp. 80--83.
Summary: Formation of melanoidins in alkaline medium have been investigated. The influence of temperature, exposure time and chemical nature of reagents on intensity of the bioactive compounds synthesis on "Maillard reaction" in model systems has been studied.
Klyuev A.Yu., Shlyashinskii R.G., Prokopchuk N.R., Stromsky A.S., Shostak L.M.
Thermooxidative destruction of terpenoidmaleic adducts and their salts. pp. 84--88.
Summary: Thermal stability of terpenoidmaleic adducts prepared by processing colophony and turpentine with maleic anhydride and their salts has been investigated. It has been shown that salts of KMA and KTMA are more stable then their analogues on the basis of parent colophony. The experimental data obtained allow to recommend amine and sodium salts of K.MA and KTMA as thermally stable additives to coolants.
Kashinskaya T.Ya., Shevchcnko N.V., Tsynkalova L.Yu., Parmon S.V.
Mechanical-chemical transformations of peat humic matters. pp. 89--92.
Summary: Applyng thermal, IR-spectral analysis and gel-penetrating chromatography the humic matters of ten and raised peats have been investigated. Dispersion of peat in the attrition device results in their humic acids chemical composition change.
Shevchuk V.V., Busel A.V., Minin A.V., Rudakovskaya T.G., Zhdanovich I.B.
Influense of sodium choride solutions on concrete corrosion. pp. 93--95.
Summary: The mechanism of sodium and potassium chloride action on concrete corrosion has been studied. It has been shown that the concrete destruction is caused by the transformation of the lime formed when the concrete becomes harden in soluble calcium chloride under the action of sodium and potassium chloride.
Golubeva V.S., Chistyakova E.I., Rudakova O.A.
Influence of extraction conditions on output and chemical composition of alcoholic peat extracts. pp. 96--97.
Summary: The influence of extraction conditions on the output and the chemical composition of alcoholic peat bitumens was studied.
ФИЗИКО-ХИМИЧЕСКИЕ ПРОБЛЕМЫ ЭКОЛОГИИ
Khomich V.S., Kukareka S.V., Kukharchik T.I., Kravchuk L.A., Fedorov A.B.
Pollution of natural environment by heavy metals in the impact zone of crystal glass production. pp. 98--103.
Summary: Crystal glass production is responsible for 1/4 of total lead emission in Belarus. In the article results of landscape-geochemical investigations in the impact zone of the Neman Crystal Glass Plant (Berezovka) which have produced lead crystal glass about 100 years are discussed. It was established, that in this zone heterogeneous landscape-geochemical polyelemental anomaly developed. In the association lead and zinc are of first priority. Anomaly is revealed in the atmospheric air, surface and ground waters, soils and vegetation. It is displayed differently in various components. So in air and vegetation pollution is revealed up to 1.5 km from the source, soil pollution most distinct on the distance up to 0.5 km. High level of ground waters pollution is determined on the sites adjacent to the plant territory and to waste water treatment facilities. Data on heavy metals accumulation in aerosol emission and main components of the environment are given.
Likhacheva A.V., Martsul' V.N., Magrel L., Denis L.
Interaction of sewage platforms with the environment. pp.104--108.
Summary: The research directed on the reception the quantitative information which will allow to estimate and predict a level of sewage sludge platforms influence on the environment are carried out. The laws of migration of zinc. chrome and iron from Biological sewage sludge (BSS) are established. The total emissions of organic substances, ammonia and hydrogen sulfide in the atmosphere at the BSS storage on the sewage sludge platforms are determined. On the basis of experimental data and analysis of the known approaches to the estimation of ecological consequences a technique of the estimation of the sewage sludge platforms influence on the environment is developed.
ОБЗОРЫ
Sokolov Yu.A.
Quantum-chemical investigation of steroids and search for relationships: structure-activity. pp. 109--119.
Summary: The publications for last 10--15 years dedicated to search for structure -- activity relationships between various biological activities of steroids and quantum chemical indexes (electronic densities, dipole moments, molecular orbital energies and other electronic structure characteristics) are reviewed.
УЧЕНЫЕ БЕЛАРУСИ
Лесникович Анатолий Иванович (К 60-летию со дня рождения). С. 120--121
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Свиридов Вадим Васильевич (К 70-летию со дня рождения). С. 122--124
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Кузнецов Владилен Александрович (К 70-летию со дня рождения). С. 125--126
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/ Издания академии / Научные журналы / К началу страницы
Разработана и поддерживается Николаем Н. Костюковичем. Последнее обновление: 2 декабря 2006 г.
Создана при участии Игнатия И. Корсака
Копирайт © 2001-2006 Национальная академия наук Беларуси
Копирайт © 2001 Издательство "Беларуская навука"
