(Vestsi Natsiyanalnai Akademii Navuk Belarusi)
SERIES OF CHEMICAL SCIENCES
Published by The Belaruskaya Navuka Publishing House, Minsk, Republic of Belarus
| Proceedings of the National Academy of Sciences of Belarus (Vestsi Natsiyanalnai Akademii Navuk Belarusi) SERIES OF CHEMICAL SCIENCES Published by The Belaruskaya Navuka Publishing House, Minsk, Republic of Belarus |
Summary: The ferric sulfosalicylate having composition of Fe2(C7H4O6S)3 has been synthesized by reaction of ferric hydroxide with 5-sulfosalicylic acid. Obtained substance has been investigated by IR-spectroscopic and DTA technique. It has been done a conclusion about ferric ion coordination by carboxylic group and about the fact that coordinate bond O ® Fe is characterized substantial part of ionicity.
Summary: Alkaline activation of soils and undersoil layers has been studied. It has been shown that activation of thermotreated samples promotes increasing of sorption capacity and specific surfase of obtained adsorbents and the reasons have been considered. It has been stated that sorption capacity and specific surfase of the samples depend on degree of dissolution of after activation solution before its neutralization. Explanation of changing of structural characteristics of synthesized porous materials has been givan from a point of view of their physical properties and their interaction with alkalines.
Summary: Effect of the ion-exchanger and plasticizer nature on the selectivity of film ISEs reversible to alkaline and alkaline earth metals cations have been studied. It has been established that change in selectivity achieved about four orders of magnitude due to the variation of the ion-exchanger nature and about six orders of magnitude due to the variation of the nature of the plasticizer. These findings allows to control the selectivity and cross-sensitivity of ISEs by means of the rational choice of the ion-exchanger and plasticizer and are of essential practical interest for creation of the «electronic tongue» -- type intellectual multisensor systems.
Summary: The surface modification of fibrous sorbent Fiban AK-22-1 has been studied using different compounds containing amino groups. The structure parameters (coefficient of filtration, effective porous size) of modified materials have been investigated. Zeta-potential measurements of modified sorbents have been performed using the streaming potential method. Improved materials having positive charge of its surface are formed at using of derivatives of tetrasubstitutcd ammonium as modifier at a region of pH equal from 2.8 to 10.5.
Gavriluk I. V., Kuvaeva Z. I.
Water sorption by heptane solutions of dinonylnaphtalene sulfonic acid with aromatic amino acids. pp. 22--25
Summary: It has been established that water sorpion by reverse micelles of dinonylnaphthalene sulfonic acid with amino acids (phenylalanine, tryptophan) is function of a contens of amino acids in the sulfonic extractant and of its ionic form.
Milevich T. I.
Sorption of heavy metals ions and radionuclides Pleurotus ostreatus native biomass. pp. 26--29
Summary: It has been shown that dry biomass of «Veshenka» fungus is able to bind ions of heavy metals and radionuclides and it has high selectivity to especially dangerous pollutant -- Pb2+ ion. This composition is a perspective substrate for obtaining of sorbents which can be used as enterosorbent in different fields of production including medicine.
Grin'ko V. N., Vodopyanova L. A., Kuvaeva Z. I.
Extraction of leucine by dinonylnaphtalene sulfonic acid from water-salt solutions. pp. 30--33
Summary: Extraction of leucine by octane solution of dinonylnaphtalene sulfonic acid from water-salt solutions in wide range of pH has been studied. The maximum extraction was at pH » 2.0 when leucine exists as cation and zwitter-ion forms simultaneously. Water sorption by extraction complexes of organic phase has been determined.
Kurgan S. V., Petrov G. S., Bashkirov L. A., Klyndyuk A. I., Bushinskii M. V.
Physical-chemical properties of solid solutions of La1-xGdxCoO3 cobaltites. pp. 34--38
Summary: Solid solutions of La1-xGdxCoO3 (x = 0; 0.1; 0.25; 0.5; 0.75; 0.9; 1.0) have been synthesized. Crystal lattice parameters have been calculated on a base of X-ray data. Measurements of electrical conductivity and thermal expansion of the obtained samples have been carried out at temperature range of 300--1100 K in air. Anomalies of electrical conductivity and thermal expansion at semiconductor-metal phase transition are observed for all cobaltites, as well as values of average linear coefficient of thermal expansion changes.
Malchenko N. S., Ratko A. L, Zonov Yu. G., Muravitskaya E. V.
Formation of structure of indium and bismuth oxides from sols of co-precipitated metals hydroxides. pp. 39--44
Summary: Peculiarities of the formation of In2O3--Bi2O3 mixed oxide obtained by the sol-gel method have been studied. The effect temperature and phase composition on the microstructure of particles of indium oxide and morphology of samples have been investigated.
Summary: A method of synthesis of functional substituted nitrogen- and phosphorus containing salts of D, L-camphoric and m-carborane-1,7-dicarboxylic acids has been described.
Bezborodov V. S., Kauhanka U. M.
Reduction of some 3-amyl-5-(4-substitutcd)-phenyl-2-isoxazolines with Raney nickel in formic acid. pp. 49--52
Summary: Reduction of some 3-amyl-5-(4-substituted)-phenyl-2-isoxazolines with Raney nickel in formic acid has been studied. It has been stated that cleavage of 2-isoxazolinic cycle in Ia-r compounds leads to either correspondent b-hydroxyketones <>II or a, b-unsaturated ketones III as main products in dependence on temperature and substitute in aryl part of the molecule.
Okaev E. B.
Synthesis of novel highly lipophylic quaternary ammonium salts having controlled steric accessibility of their cationic center. pp. 53--57
Summary: A scries of novel highly lipophilic quaternary ammonium salts (QAS) has been designed and prepared. It has been shown that trialkyl(2,3,4-trialkoxybenzyl)ammonium and trialkyl(3,4,5-trialkoxybcnzyl)ammonium QAS derivatives can be prepared from pyrogallol and methyl gallate, respectively, in good overall yield. When more than one methyl group at quaternary nitrogen atom is present, these compounds demonstrate increased affinity for double-charged anions. The latter fact opens up possibilities for their use as electroactive compounds in ion-selective electrodes.
Rudakov D. A., Shirokii V. L., Knizhnikov V. A., Potkin V. I., Maier N. A., Ryabtsev A. N.
Electrochemical behavior of halogen derivates of bis(1,2-dicarbollyl)cobalt (III). pp. 58--59
Summary: Electrochemical behavior of halogened ions of bis(1,2-dicarbollyl)coball (III) has been studied. Influence of halogen onto reversible potentials has been determined.
Summary: Highly specific monoclonal antibodies (MAB) to human thyroid peroxidase (TPO) giving no cross-reactions with structurally related antigens (thyroglobulin and peroxidases from other sources) have been obtained. The MABs retained antigen-binding capacity after the immobilization onto a solid phase and the chemical modification with a biotin derivative. It has been shown that MAB clones A1 and F8 interact with the spatially separated conformational epitopes of TPO and thus TPO has the ability to associate with the two MABs simultaneously. In terms of the epitope specificity, MAT F8 are similar to antibodies from the blood of patients with autoimmune thyroiditis. It has been concluded that the characteristics of MAB binding activity meet the requirements of an affinity chromatography and immunoanalysis.
Karasyova E. I., Gaponik P. N., Voitekhovich S. V., Metelitza D. I.
Activation of peroxidase-catalyzed oxidation of chromogenic substrates by tetrazole and its derivatives. pp. 67--73
Summary: The effect of tetrazole (T) and its 5-substituted derivatives 5-aminotetrazole (AmT), 5-benzyltetrazole (BT), 1,3-di(5-tetrazolyl)propane (DTP), 1,2-di(5-tetrazolyl)ethane (DTE) and 5-(2-di-methylaminoethyl)-tetrazole (DMAET) on the peroxidase-catalyzed oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) and guaiacol has been studied at 20 °C in phosphatecitrate buffer (pH 6.4 and 7.2). Activating effect of the used compounds was characterised by the coefficient a, M-1 that decreased in the TMB oxidation as follows: BT>DTP>T>DTE>DMAET from 828 (BT) up to 62 M-1 (DTE) at pH 7.2. Peroxidase-catalyzed oxidation of guaiacol was weakly activated by AmT and DMAET, tetrazole was indifferent in reaction, but DTE, DTP and BT in concentrations higher that of substrate inhibited the peroxidase process.
Summary: Influence of soil organic components onto radioactive strontium mobility in the soil medium has been analyzed. Distribution of the 90Sr between various organic fractions of soils having different quantitative and qualitative composition of organic matter has been studied. The samples of mineral and organic soils contaminated by radionuclides of Chernobyl origin were used as the objects of investigation. Fulvic- and humic-acid fractions differed in solubility and mobility in a soil medium have been separated. Differentiation of soils on the 90Sr mobility in accordance with portion of radionuclide in the immobile organic fractions has been fulfilled. New types of organic and organomineral additives decreased mobility and biological availability of the 90Sr have been suggested on a base of obtained data.
Summary: Sulfonation process of polystyrene and petroleum polymer resins having low molecular weight with sulfuric and chlorosulfonic acids, complex of sulfotrioxide and dioxane has been explored at different conditions. Synthesized water-soluble sulfoderivatcs of petroleum polymer resins were effective as plasticizers of cement mortars.
Summary: Influence of corrosion inhibitor of IK-M elaborated on a base of optimal combination of sulfonate and alkyl-phenol caps onto thermal-oxidative, physical-chemical and protective properties of motor M-10G2k and industrial I-20A oils has been studied. Its 10% concentration was found to provide thermal-oxidative properties to these oils at a level of corrosion inhibitor AKOR-1 produced in Russia.
Zhdanok S. L., Bambalov N. N.
Influence of pH onto stability of color of humic acids solutions. pp. 90--92
Summary: Destruction of humic acid molecules takes place in the alkaline medium under the influence of both the photolytic and hydrolytic reactions.
Drebenkova I. V.
Oil-soluble corrosion inhibitors on a base of fat acids of vegetation oils. pp. 93--97
Summary: Possibility of application of fat acids of vegetation oils as alternative corrosion inhibitors for improving of protective properties of minerals oils has been shown on a base of results of investigation of their physical-chemical and protective properties.
Levitskii I. A., Shimchik I. S.
Structure and properties of glasses of Na2O--CaO-- B2O3--SiO2 system. pp. 98--101
Summary: Results of a complex study of Na2O--CaO--B2O3--SiO2 system have been presented. Influence of CaO introduced to the system instead of SiO2 in a quantity of mass from 5 up to 30 wt% (with step 5%) has been stated. Influence of CaO to melting, crystallizing and physical-chemical properties has been studied. Phenomenon of phase inversion in the obtained glasses is supposed.
Zaitseva T. L., Zhukov V. K.
Influence of extraction conditions on guantity of substances educed from Potentilla (Comarum palustre L.). pp. 102--104
Summary: Influence of some technologic parameters onto output of water-alcohol extract from Potentilla (Comarum palustre L.) has been studied. Their optimal values for obtaining of maximal quantity of extractive substances have been determined.
Bobkova N. M., Khotko S. A.
Easily melted glasses on a base of ZnO--PbO--B2O3 having reduced content of lead oxide. pp. 105--108
Summary: Characteristics of glasses in a system of ZnO--PbO--B2O3 (+SiO2 and BaO) having reduced content of lead oxide have been analyzed. The field of compounds which can be used as fluxes for producing of silicate paints and glass covering has been determined.
Mozheiko F. F., Alexandrovich Kh. M., Voitenko A. I.
Intensification of a process of deslime of potassium ores. pp. 109--113
Summary: It has been proposed to use perspective dispersing agents (peptising agents) for intensification of process of deslime of difficultly beneficating high clay potassium ores.
Zholnerovich N. V., Gorskii G. M., Chyornaya N. V.
Influence of cationic polyelectrolytes onto durability of paper consisted of fibrous suspension. pp. 114--117
Summary: Usage of cationic polyelectrolytes in fibrous suspension rises durability of fibrous structured grid and prepared from it paper samples.
Lesnikovich A.I., Lakhvich F.A., Agabekov V.Ye. et al.
Fyodor Nikolaevich Kaputskii (to 75th anniversary). pp. 118--119
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Lesnikovich A.I., Lakhvich F.A., Soldatov V.S. et al.
Vladimir Enokovich Agabekov (to 65th anniversary). pp. 120--122
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