Proc. of the Natl. Academy of Sciences of Belarus, Ser. Chemical Sci., 2006, No.1
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Proc. of the Natl. Academy of Sciences of Belarus, Ser. Chemical Sci., 2006, No.1
| Proceedings of the National Academy of Sciences of Belarus
(Vestsi Natsiyanalnai Akademii Navuk Belarusi)
SERIES OF CHEMICAL SCIENCESPublished by The Belaruskaya Navuka Publishing House, Minsk, Republic of Belarus |
Number 1, 2006
CONTENTS
INORGANIC CHEMISTRY
Klyndjuk A. I., Petrov G. S., Polujan A. F., Bashkirov L. A.
Thermal expansion and electrical conductivity of Åu(Âà, Sr)2Cu3O7- d cuprates. pp. 5--9.
Summary: The thermal expansion and electrical conductivity of the Åu(Âà, Sr)2Cu3O7- d cuprates at 300--1100 K have been studied. Three structural phase transition temperatures (about 500, 800 and 1000 K) for both cuprates have been determined. The latter can be explained in terms of the rearrangement of the oxygen sublattice of samples. The values of the activation energy of electrical conductivity of the samples in oxygen, air and argon have been calculated.
ANALYTICAL CHEMISTRY
Zabrodskij V. N., Kashinskij A. V., Kosandrovich E. G.
Mathematical uncertainty of results of the analysis of air on contents H2S and NH3. pp. 10--17.
Summary: Uncertainties for results of H2S and NH3 determination in air have been calculated. Calculations have been done using spreadsheet approach making them more easy and reliable. Some metrological parameters of procedures, in particular, detection limits and expanded uncertainties of the final result, have been determined. The linear regression method has been used to obtain the relationship between the combined standard uncertainty and the analyte level. Components responsible for largest contributions to result uncertainty have been identified.
Egorov V. V., Bolotin A. A.
Influence nature of plasticizing agent and ion exchanger on selectivity ISE, convertible to cations physiologically active amines. pp. 18--21.
Summary: The influence of plasticizers - o-nitrophenyl octyl ether and dibutyl phthalate as well as ion-exchangers - tris(nonyloxy)benzene sulfonic acid and tetrakis(4-chlorophenyl)borate - on the selectivity of ISEs reversible to physiologically active amine (PhAA) cations possessing different structures has been studied. Both plasticizer and ion-exchanger were found to be able to essentially influence the potentiometric selectivity. The maximum effect of the selectivity change dependent on the plasticizer and ion-exchanger choice amounts to 2.7 orders. The results obtained have been explained in terms of specific character of PhAA ionogenic and other polar groups plasticizer solvation as well as peculiarities of the PhAA cations' ionic association with ion-exchangers.
Rahman'ko E. M., Tsvirko G. A., Bogdanovich U. V.
Film ion-selective electrode on anion CdBr42- for definition of cadmium at the presence of waterproof one-charge anions. pp. 22--25.
Summary: The electrochemical properties of ion-exchange electrode designed to determine cadmium in form of double-charged trirnethyloxybenzylammonium complex has been studied. Experimental values of the potentiometric selectivity coefficients for anions series have been determined. The data obtained show that the incorporation of unsymmetrical QAS with a high level of ion-exchange spatial accessibility results the increase of selectivity to a primary ion.
COLLOID CHEMISTRY
Komarov V. S., Repina N. S. †, Rat'ko A. I.
Influence of temperature of sedimentation metal hydroxides on sorbent structure. pp. 26--28.
Summary: The precipitation temperature dependence of structure alluminium/iron/magnium hydroxide formation has been studied. It has been shown the sorption capacity and specific surface of samples increases with precipitation temperature enhancing. The mechanism of temperature dependent structure formation processes responsible for colloid aggregation has been discussed.
Komarov V. S., Seredjuk L. I., Rat'ko A. I.
Synthes and studying of organic-mineral and carbon sorbents. pp. 29--31.
Summary: The organic modificators such as nitrocellulose and methykellulose were shown to influence much on structure of different organomineral substances. Thus, nitrocellulose is depolymerized and fails to be structure formed in alkaline medium. On the contrary, the nitrocellulose aqueous solution in a mixture with alkaline activated methacoaline hydroxide after shows high activity. Inorganic pore-former-free methylcellulose has a similar activity.
Mozhejko F. F., Vojtenko A. I., Goncharik I.I., Kulikova T. P.
The foam-forming and stabilizing activity of sodium decilsulphate in three-phase foams. pp. 32--34.
Summary: The influence of solid phase and inorganic salts on properties of sodium decylsulphate three-phase foams has been studied.
Ostrovskaja E. F., Krut'ko N. P., Opanasenko O. N., Ovseenko L. V.
Influence of reactionary ability of mineral materials on their interaction with bitumen emulsion. pp. 35--38.
Summary: The interaction between various mineral substances with bitumen components emulsions has been studied. In particular the equilibrium concentration of octadecylpropelenediamine (ODPDA) in a dispersion phase as well as ODPDA absorption on bitumen droplets and mineral surface has been determined. The value of ODPDA absorption on mineral materials was shown to be dependent on reaction ability of the latter, which is characterized by a total basic ion-exchange potential (TBIEP). The variation of pH values for dispersion phase formed while the interaction of bitumen emulsions with mineral materials correlates with data obtained for model HC1 and ODPDA solutions.
PHYSICAL CHEMISTRY
Azizbekjan O. P., Jakimovich M. N., Bychkova V. A., Kuvaeva Z. I.
Solubility of L-isoleucine and L-leucine in water solutions. pp. 39--43.
Summary: The solubility of L-isoleucine and L-leucine in aqueous/hydrochloric/ammonia/ ethanol solutions at 25 %C have been measured. The amino acid solubility was shown to be invariable in aqueous solutions in the pH range 3,0-9,0. The solubility out the pH range mentioned is rising up to reach the maximum at pH ® 0 and pH 12,0. The solubility of L-isoleucine and L-leucine cations was shown to be essentially higher than that for appropriate anions.
Kabo A. G., Blohin A. V., Markin A. V., Smirnova N. N., Lebedev B. V. †
Enthalpy and temperature depolymerization of separate polymeric phases fullerene C60. pp. 44--48.
Summary: Temperature functions of heat capacity for samples of crystalline dimerized and polymerized fullerite C60 phases have been investigated in the "heat bridge" differential scanning calorimeter within 300-650 K interval with uncertainty ± 3%. The samples have been synthesized from monomelic C60 under pressure of ~109 Pa and at elevated temperatures. Endothermal transformations caused by depolimerization of C60 dimer and polymers have been detected in the temperature range studied, and their thermodynamic characteristics (temperature ranges and enthalpies of transformation) have been determined.
Hryntsevich I. B.
Influence of structure flavonoids on their reactionary ability in relation to radikals of a-hidroxiethile. pp. 49--52.
Summary: The influence of various flavonoids and the appropriate model compounds on the formation of primary ethanol radiolysis products such as acetaldehyde and butan-2,3-diol has been studied. The structure of flavonoids influences much the yield of ethanol radiolysis products. Flavon(ol)s and model compounds were shown to have the largest activity to a-hydroxyethyl radicals, which resulted the maximum suppression of butan-2,3-diol formation.
Serezhkina S. V., Frolova E. V., Shevchenko G. P., Malashkevich G. E.
Formation and properties of ultradisperse particles Germanium in thin film of systems SiO2--GeO2 and ZrO2--GeO2. pp. 53--57.
Summary: The peculiarities of GeO2 to Ge reduction in the sol-gel derived SiO2--GeO2 and ZrO2--GeO2 thin films has been discussed. The Germanium nanoparticles formation process in thin films was shown to be determined by the composition, method of initial sol preparation as well as the oxide matrix nature.
Vatutina O. M., Sokolova V. I., Sokol V. P., Soldatov V. S.
A new composite sorbent for clearing potable water of arsenic. pp. 58--61.
Summary: A new composite sorbent FIBAN As-5 for water purification from arsenic compounds in domestic conditions has been developed in the Institute of Physical Organic Chemistry. FIBAN As-5 is a fibrous nonwoven material, diameter of fiber is 48.5 ± 5 µm, length -- 6--8 cm, contains nanoscale hydrated Fe(III) oxide particles. Concentration of Fe(III) is 1.3--1.5 mmol/g.
The main sorbent characteristics are presented and comparative analysis with well-known sorbents based on nanoscale hydrated Fe(III) oxide particles has been carried out.
ORGANIC CHEMISTRY
Dikusar E. A., Kadutskij A. P., Kozlov N. G., Juvchenko A. P., Melnichuk L. A.
Salt of spiro-derivatives benzo [f] quinoline and of some natural carboniferous acids. pp. 62--63.
Summary: A new method for salt formation from spiro-derivatives of benzo[f]quinoline and natural carboxylic acid has been developed.
BIOORGANIC CHEMISTRY
Tsyganova O. V., Kiseleva E. P., Vashkevich I.I., Sviridov O. V.
Isolation of autoantibodies to human thyroid peroxidase by antigen-affinity chromatography and their use in an immunoassay. pp. 64--71.
Summary: Using fractionation on chromatographic columns containing immobilized human thyroperoxidase (TPO) or thyroglobulin, pure autoantibodies (AAB) to TPO have been obtained from blood serum of patients with thyroid autoimmune diseases. AAB affinity to full-length TPO and its proteolysis fragments have been studied. A construction was developed and medical and analytical parameters were determined of a competitive enzyme immunoassay system for the quantitative analysis of AAB to TPO in undiluted human serum samples.
TECHNICAL CHEMISTRY AND CHEMICAL TECHNOLOGY
Krut'ko N. P., Mozhejko F. F., Korshuk E. F., Shevchuk V. V., Dihtievskaja L. V., Potkina T. N.
Influence of surface-active substances and hydrocarbons on physicomechanical properties of granulation potash manures. pp. 72--77.
Summary: Modified compositions obtained from fat amine, carboxylic acid and non-polar substances were shown to be very effective waterproofing agents for KCl, providing 60% degree of hydrophobization and 96--97% dynamic adhesion of potassium chloride.
Zajtseva T. L., Zhukov V. K. Krivorot A. A., Golubeva V. S.
Structure and properties of hydro-alcoholic extracts from some peat forming plants. pp. 78--80.
Summary: The extracts from plant samples of low moor flora (Phragmites Communis Trin., Menyanthes trifoliate L., Comamm Palustre L.) have been isolated by extraction with water-alcoholic solvent. The optimum technological parameters of extracting peat-forming plants have been determined. The output of extracts on the average is of 22.9% from weight of air-dry raw material. The chemical constituents of extracts have been studied. Extracts from peat-forming plants was shown to contain high quantity of biologically active substances such as triterpenoids and unsaturated organic acids. The antiseptical action of Phragmites Communis's extract to Pseudomonas aeruginosa and Staphylococcus aureus has been detected.
Bobkova N. M.
The glass of borates, their property and a structure. pp. 81--85.
Summary: The dependence of borate glasses properties upon the content of alkali and alkali earth metal oxides has been analyzed. Structural interpretation of relationship between glass composition and the appropriate properties has been proposed.
Karpunin I. I.
Kinetics and the mechanism of alkaline boiling of wood at the presence of salts of metals of variable valency. pp. 86--90.
Summary: Within the studied range of parameters, kinetics-mathematical model of alkaline wood cooking taking into account the effect of variable valence metal salts (copper and nickel acetates) has been presented.
The model allows forecasting the system behavior for above salts, optimizing and controlling alkaline cooking mode in preparation of fibrous intermediate products from plant raw materials.
Bambalov N. N., Smirnova V. V., Navosha J. J., Parmon S. V.
Peculiarities of fractions of peat humie acids. pp. 91--95.
Summary: Molecular structure of labile fraction of peat humic acids has been studied by means of acidic hydrolysis and IR-spectroscopy. It was shown that the labile fraction contains the more light hydrolysable substances compare to fraction isolated by a sodium pyrophosphate and unfractioned humic acids. The differences in composition of labile fractions isolated from low-moor and high-moor types of peat has been established.
Dormeshkin O. B., Vorob'ev N. I., Novik D. M.
Obtaning of potassium nitrate by conversion method. pp. 96--101.
Summary: The process of potassium chloride conversion by ammonium nitrate in order to develop the non-waste technology for potassium nitrate production has been studied.
The optimal way of organizing the process has been proposed on the basis of solubility diagram investigation for the system Ê+, NH4+ // NO3-,C1" -- H2O, and the main steps of the process have been studied.
The results obtained provide the opportunity for developing the optimal technological mode of potassium chloride conversion and form the basis for designing the process installation.
Shevchuk V. V., Fedorov I. V., Vojtenko A. I., Strel'chenok E. V.
Adsorption of first sort emulsions by natural minerals dispersions. pp. 102--106.
Summary: Adsorption of oil-in-water emulsions stabilized by various surfactants, montmorillonite, calcite and graphite suspensions in water and in saturated water solutions of sodium and potassium chloride has been studied.
It has been established that emulsifier's nature is a determining factor in the adsorption process.
Bokaja G. M., Ivanova L. A., Dambovskaja T. D.
Complex method of an estimation of metal corrosion in motor oils environment. pp. 107--110.
Summary: An integrated laboratory method of qualitative estimation of atmospheric, chemical and electrochemical metal corrosion intensity under the conditions, simulating fuel tank of automotive and tractor machinery, has been designed.
A composition of combined corrosion inhibitor for engine fuels has been suggested and its testing results in comparison to AKOR-1, the corrosion inhibitor produced and adopted for these purposes in Russian Federation, have been provided.
Chernaja N. V.
Influence of rosin padding on paper and a cardboard quality. pp. 111--115.
Summary: The deviation in the structure of alumina resin complexes by means of pH increasing from 1.95--2.70 to 4.30--5.30 in Al2(SO4)3 solution leads to the improvement of the gluing of process. The properties of the paper depends on possible aluminium compounds combinations.
Prokopchuk N. R., Kljuev A. J., Puchkova N. V.
Resistance of modified rosins and their esters to thermooxidizing destruction. pp. 116--123.
Summary: Stability of modified colophonies and their esters under thermodestruction conditions has been studied.
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