Известия Нац. академии наук Беларуси. Сер. хим. наук 2002, No.2
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Известия Нац. академии наук Беларуси. Сер. хим. наук 2002, No.2
| Известия Национальной академии наук Беларуси
СЕРИЯ ХИМИЧЕСКИХ НАУКИздатель: Беларуская навука, Минск, Республика Беларусь |
Номер 2, 2002
СОДЕРЖАНИЕ
НЕОРГАНИЧЕСКАЯ ХИМИЯ
Mozolevskaya T. V., Stepanova L. I.
Synthesis of molybdenum trioxide with regulated dispersion in water media. pp. 5--11
Summary: It has been shown that variating synthesis conditions allowes to receive from aqueous solution of molybdenum acid both crystalline round particles and needle-shaped and parallelepiped-shaped molybdenum trioxide particles with the size from a few nanometres to some micrometres.
Gorbunova V. A., Gamanovich N. M., Novikov G. I.
Structure and conductivity of electrode materials on the basis of manganites of mixed REE of cerium group. pp. 12--19
Summary: The structure characteristics and conductivity parameters (at 290--1270 К) of novel efficient La0.8-xLnxCa0.2Mn0.94Cr0.04Ni0.02O3 and La1-xLnxMnO3 (Ln -- mixture based on cerium group rare earth elements with varied composition; x = 0-1) materials were investigated which are promising for application in air electrodes of high temperature fuel cells as well as other electro-chemical devices with zirconia electrolyte.
Yakutik I. M., Shevchenko G. P., Branitsky G. A., Sviridov V. V. †
Preparation of silver sols by contact reduction of metal in water solution. pp. 20--24
Summary: A possibility was found of using the reactions of contact metal reduction from aqueous solutions to produce silver sols. The effects of the nature of the reducing agents and water-soluble polymers used, pH, stirring, solution temperature, ultrasonic radiation etc. on optical properties of the sols and on the size and shape of the silver particles were investigated. It was shown that the reason for the sols being formed upon the contact metal reduction is that the silver particles are dispersed by the action of the water-soluble polymers.
КОЛЛОИДНАЯ ХИМИЯ
Komarov V. S., Rabenok M. G., Rat'ko A. I., Repina N. S.
Adsorbents on the basis of siliceous sapropels. pp. 25--28
Summary: Adsorption-structural and acidic properties of surface of corbon-mineral adsorbents abtained on the basis of silisa sapropels activated by alkali havr been studied. It has been that adsorbtion capacity and specific surface of the samples depend directly on chemical compasiyion of sapropel (presence of silica and alumina). It has been shown that surface acidity of the synthesized samples rises leneally with rising aluminina content in sapropel.
Komarov V. S., Rabenok M. G., Rat'ko A. I., Repina N. S.
Carbon-mineral adsorbents on the basis of carbonate sapropels. pp. 29--32
Summary: The combined method for obtaining metal-phosphate and metal-sulfate carbon-mineral adsorbents on the basis of carbonate sapropels has been elaborated. It has been shown that metal-phosphate adsorbents have the higher structural characteristics due to their low crystallization. Hydrophobic and acidic properties of surfase of synthesized carbon-mineral adsorbents depend on carbonate content in initial sapropel.
ФИЗИЧЕСКАЯ ХИМИЯ
Kirillov A. M., Kopylovich M. N., Baev A. K.
Cyclohexane oxidation in the presence of hydroxocomplexes of iron (III)-chromium (III). pp. 33--38
Summary: The quantum-chemical simulation of the processes of cyclohexane oxidation by hydrogen peroxide in the presence and absense of hydroxocomplexes Fe(III)-Cr(III) has been carried out. Mechanisms of these processes have been proposed, their thermodynamic profiles have been calculated using the semi-empirical method PM3. It has been established that the most effective catalysts for cyclohexane oxidation are hydroxo complexes of Fe3+.
Elinson I. S., Omelchenko T. N., Martinovich V. I., Tsygankov V. I.
Chemical stability and sorption properties of anionits based on chlorocontaining synthetic fibers. pp. 39--42
Summary: Chemical stability of ion exchangers synthesed by interaction of polyvinyl chloride fibers with organic polyamines has been investigated. The dependence of sorption of hydrogen chloride on duration of ion exchangers keeping in the presence of oxygen has been determined.
Makarevich N. A.
Application of classical Raoult's and Van't Hoff's laws and state equation for description of associated solutions of non-electrolytes and electrolyte. pp. 43--49
Summary: New thermodynamic charactericties such as associative and associative-ionization coefficient are proposed for discription of associated solutions of non-electrolytes and electrolytes. Their introduction into several thermodynamic equations allows to use them for theoretical description of processese in real solutions.
Shahab S. N., Agabekov V. E., Ariko N. G.
Optical properties of uniaxially stretched polyvinylalcohol films colored by indigo carmine. pp. 50--54
Summary: The results on studies of optical characteristics and polarization ability of the uniaxially oriented polyvinylalcohol films with dichroic organic dye -- indigo carmine are summarized.
Kol'nenkov V. P.
Diagrams of selectivity fields in four-ionic ion exchange equilibriua. pp. 55--61
Summary: A graph-analytical method for modeling and analysis of tetrahedral diagram of the fields of ion selectivity in the fourionic differently valent exchange has been developed. Using concrete examples the dependence of selectivity fields and corresponding rows on correlation between the pair equilibrim coefficients and valents of changing ions has been shown.
Shahab S. N., Agabekov V. E., Ariko N. G.
Influence of quinaldine red on optical and thermal properties of uniaxially stretched polyvinylalcohol films. pp. 62--65
Summary: The influence of concentration of the dye in film and degree of its stretching on temperature destruction and coefficient of thermal conductivity of film is investigated.
ОРГАНИЧЕСКАЯ ХИМИЯ
Dikusar E. A., Kozlov N. G., Potkin V. I., Moiseichuk K. L.
Tertiary acetylenic alcohols based on 1-heptadecine. pp. 66--72
Summary: The tertiary acetylenic alcohols were synthesized by reaction of 1-heptadecyne with butyl lithium followed by interaction of 1-lithiumheptadecyne obtained with alyphatic, aromatic, alicyclic and terpenic ketones.
Vashkevich E. V., Potkin V. I., Kozlov N. G., Vecher E. I.
Quinoline derivatives on the basis of 3-(l-adamanthyl)-3-chloro-2-propen-1-al. pp. 73--75
Summary: The corresponding hydrochlorides of s-trans-1-(1-adamantyl)-3-iminoaryl-1-propenyl-1-R-amines were obtained by the interaction of s-cis-3-(1-adamantyl)-3-chloro-2-propen-1-al with p-anisidine, ptoluidine, p-iodaniline and 1-naphthylamine. 2-(1-Adamantyl)-substituted quinolines were synthesized by heterocyclization in glacial acetic acid of the salts obtained. The sulfation of 2-(1-adamantyl)quinoline by sulfuric acid lead to the formation of 2-(1-adamantyl)-8-quinolylsulfoacid.
БИООРГАНИЧЕСКАЯ ХИМИЯ
Drozhdenyuk A. P., Eremin A. N., Moroz I. V., Pavlovskaya Zh. I., Mikhailova R. V.
Purification of out-of-cell catalase of the mushroom P. piceum on 648 CaF-gel. pp. 76--82
Summary: Two forms of catalase (CAT--1 and CAT--2) of the mushroom P. piceum were purified by bath-chromatography on CaF-gel from filtrate of culture liquid (FCL). The conditions of the absorbtion of catalases from FCL on CaF-gel were optimized. The catalase samples were characterized by spectral and kinetic techniques. The molar extinction coefficient of CAT--1 (405 nm) and CAT--2 (404 nm) are equal 98 200 and 96 500 M-1 • cm-1 accordingly. CAT--1 and CAT--2 contained 15.4 and 14.1% of a-helix, 28.9 and 29.4% antiparallel, 4.1 and 5.1% of parallel b-sheets, 26.7 and 21.7% of b-turns. The kinetic parameters of catalases complex depended on protein content in the reaction solution. The maximal specific activity CAT--1 and CAT--2 was 58.8 and 80.6 units. At concentration 0.5 nM, CAT--1 and CAT--2 were kinetically characterized: Km 50.5 and 54.1 mM, kcat 2.27 • 106 and 3.18 • 106 s-1. The low operational stability of CAT--1 and CAT--2 were shown.
ХИМИЯ ВЫСОКОМОЛЕКУЛЯРНЫХ СОЕДИНЕНИЙ
Shlyk E. G., Gorskii G. M.
Change of structure ordering of cellulose during beating process. pp. 83--85
Summary: Using IR spectroscopy and X-ray diffraction analysis the crystalling degree of cellulose changed during the beating process has been studied.
ТЕХНИЧЕСКАЯ ХИМИЯ И ХИМИЧЕСКАЯ ТЕХНОЛОГИЯ
Lishtvan I. I., Gapanovich E. V., Kraiko B. M.
Purification of stock-breeding complexes sewage by electro-floto-coagulation. pp. 86--90
Summary: Possible application of electro-float-coagulation for stock-breeding complexes sewage purification from ammonium and phosphate ions has been shown.
Brazhnikov M. M., Grinyuk E. V., Brazhnikova L. Yu., Krul L. P.
Adhesion properties of glue compounds in glass-paper systems. pp. 91--93
Summary: Methodical approaches to determine adhesion properties of polymer glues in a glass-glue-paper system which are suit-
able for label glues quality estimation have been considered. Techniques for glues adhesion properties determining based on
shearing and tearing off testings have been proposed.
Ostroukh O. V., Tsedrik T. P., Boltovskii V. S.
Production of ethyl alcohol and fodder yeast by bioconversion of plant raw material. pp. 94--98
Summary: The process of bioconversion of cellolignine obtained from wood-shrubby raw material has been studied. The influence of various microbe species and their aggregations on dynamics of reducing substances and protein accumulation during cellolignine solid-phase fermentation has been investigated.
Karpunin I. I.
Changing of chemical composition of products of lignin compounds transformation under alkali digestion. pp. 99--102
Summary: The paper deals with the products of alkali digestion in lignin model compounds. Some tetrameric and pentameric compounds formed in the course of alkali digestion were isolated and identified. The composition of isolated and identified compounds indicates the course of condensation-polymerization reactions during alkali digestion of plant material.
Mozeiko F. F., Korshuk E. F., Potkina T. N., Zonov Yu. G.
Substantial composition of phosphorites of the Mstislavl deposit. pp. 103--107
Summary: It has been shown, that phosphatic minerals of the Mstislavl deposit phosphorites are submitted basically by fluorcarbonateapatite, and their optical and X-ray diffraction parameters are typical for similar minerals of the Russian platform deposits.
Burdovitsina L. I., Domovskaya T. G., Mozeiko F. F.
Influence of thermal activated phosphogypsum on foaming capasity of binary mixtures of anion-active SAS. pp. 108--112
Summary: The stabilizing effect of heat-treated phosphogypsum on foaming capacity of different anion-active surfactants has been studied. Possible application of phosphogypsum as a local raw material for production of cellular concrete is shown.
ФИЗИКО-ХИМИЧЕСКИЕ ПРОБЛЕМЫ ЭКОЛОГИИ
El'shin A. I., Vegera A. I., El'shina I. A.
Influence of secondary contamination of water in water-supply systems on its filtration. pp. 113--120
Summary: The results of a research with secondary water contamination of urban and industrial water supply systems is presented. It was found that products of corrosion and bio-fouling, which inderictly influence on such parameters as turbidity, total organic contentration and iron concentration are the reasons of secondary pollution of tap water in systems of drinking and technical water supplies. For qualitative valuation of secondary pollution availability and filterability of water a silt density index (SDI) can be used. It was shown that water pre-filtration through the ordinary filters, for example, the knitted ones, improves parameters of water (firterability, turbidity, total organic concentration etc). On the basis of the data obtained a modified of SDI calculation is developed for different water systems.
УЧЕНЫЕ БЕЛАРУСИ
Игорь Николаевич Ермоленко (К 70-летию со дня рождения). С. 121--123
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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 © 2002-2006 Национальная академия наук Беларуси
Копирайт © 2002 Издательство "Беларуская навука"
