Separation of phenols, alcohols, and alkylbenzenes by gas chromatography on adsorption layers of copper and nickel alizarinates

The separation of mixtures of phenols, alcohols, and alkylbenzenes by gas chromatography on adsorption layers of nickel and copper alizarinates was investigated. The thermodynamic parameters were calculated. It was shown that the sorbates differ in strength of interaction with the copper and nickel ions in their alizarin complexes.     

Cyclic deformation of aluminium and its alloys

The formation of slip bands is the main mechanism of cyclic deformation in pure Al. Their density, orientation and heights in polycrystalline Al were investigated during cycling. Types, sizes and densities of precipitates are responsible for the mode of cyclic deformation in AlCu4 pure alloy. In technical Al alloys intermetallic phases have detrimental effects on deformation homogeneity and largely govern the fatigue mechanism of the material and especially microcrack initiation.     

含氧光敏引发体系的研究——Ⅵ.二苯酮/三乙胺体系引发光聚合过程中的再次引发效应

过去,作者曾发表了多种光敏引发体系引发烯类单体光聚合的工作,在研究2,2-二甲氧基苯乙酮在氧存在下引发甲基丙烯酸甲酯光聚合时,结合在聚合物链端的引发剂碎片具有光化学活性,在光聚合反应中产生高分子自由基,发生再次聚合,出现高分子量     

Sodium aluminum hydride reduction of organic compounds in hydrocarbon media

Summary The reduction of complex esters and carbonyl compounds in hydrocarbon media by aluminum hydrides of the alkali metals results in the formation of the corresponding alcohol in high yield. The reduction of nitriles proceeds with the formation of primary amines.     

Alkali metal salts of acrylamide C3H4NOM (M = Li,Na, and K): Synthesis and vibrational spectra

Alkali metal salts of acrylamide C₃H₄NOM (M = Li, Na, and K) were synthesized for the first time by metallation of acrylamide with alkali metals, their alkyl derivatives, or hydrides. The structures of the compounds synthesized were studied by Raman and IR spectroscopy. Based on the results obtained, an ionic structure was proposed for the salts. The salts were tested as initiators of the anionic polymerization of acrylamide. The catalytic activity of C₃H₄NOM in the polymerization of acrylamide is not lower than that of the well known catalyst, KOBu¹.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 2316–2319, September, 1996.     

A study of complexation in the system constituted by water,carbamide, and sulfur dioxide at 293 K

Electronic absorption spectroscopy and potentiometry were applied to study complexation at 293 K in a system constituted by water, carbamide, and sulfur dioxide. The composition and stability of the molecular and ionic complexes formed was determined in relation to the concentration of components in solution.Translated from Zhurnal Prikladnoi Khimii, Vol. 77, No. 8, 2004, pp. 1266–1270.Original Russian Text Copyright © 2004 by Khoma, Gavrilenko, Nikitin.     

Reactions of diisobutyl- and diethylaluminum hydrides with α-acetylenes

Conclusions To obtain Al vinyl compounds R₂A1CH=CHR' by reacting R₂AlH with HC=CR', we must use weakly acid acetylenes (alkyl acetylenes) and perform the reaction in aliphatic hydrocarbons at a low temperature in excess acetylene.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 910–912, April, 1968.     

Application of an ion-selective field effect transistor with a photocured polymer membrane in nephrology for determination of potassium ions in dialysis solutions and in blood plasma

Application of a potassium ion sensor based on an ion sensitive field effect transistor (ISFET) for ion control of a dialysis solution in an artificial kidney and in blood plasma of patients treated by hemodialysis is presented. Sensors and their long-term stability were characterised in constant contact with test solutions. Test results are compared to those obtained with conventional ion-selective electrodes and commercial blood ion analyser. Tested ISFET sensors showed high reliability in potassium ion measurements in the physiologically significant concentration range which, along with low cost of their production, makes them promising for cited application.     

Influence of the silver ions on the physicochemical properties of methyl methacrylate-methacrylic acid copolymer films

The effect of silver ions on the physicochemical properties of methyl methacrylate-methacrylic acid copolymer films, namely, film-forming properties and resistance to fluorine-containing plasma, acid etchers, and temperature, was studied by lithography, derivatography, atomic-force microscopy, and optical spectroscopy. The activation energies were calculated for thermal transformations in the copolymer with and without silver ion additions, when heated in air to 300°C.     

Synthesis of yttrium,lanthanum, neodymium,praseodymium, and lutetium alkoxides and acetylacetonates

A convenient and practical method is proposed for the synthesis of lanthanide and yttrium alkoxides. The method involves dissolving the metals or their hydrides in a solution of dry HCl in the corresponding alcohol, with subsequent dehalogenation of the LnCl₃ solution by an equivalent amount of alkali metal (Na, Li), The rareearth alkoxides are easily converted into acetylacetonates Ln(acac)₃ by the action of acetylacetone.A. N. Nesmeyanov Institute of Elementoorganic Compounds, Russian Academy of Sciences, 117813 Moscow. Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 11, pp. 2490–2493, November, 1992.