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1.
I. V. Yakushin 《Russian Physics Journal》1991,34(12):1090-1094
The contribution of the interacting vector and pseudovector torsion components to the interaction of polarized photons in an atomic sodium vapor is investigated. Estimates are obtained for the parameters of the gauge-theoretical model of gravitation.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 50–55, December, 1991. 相似文献
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U. K. Stirna I. V. Sevast’yanova V. A. Yakushin D. M. Vilsone 《Polymer Science Series B》2007,49(11-12):261-266
Comb-shaped segmented poly(urethanes) have been synthesized from ethers via the one-step procedure with the use of glycerol monostearate, D,L-3-octadecyloxy-1,2-propanediol, 3-tert-butoxy-1,2-propanediol, 3-benzyloxy-1,2-propanediol, and 1,2-propanediol as chain extenders. The soft segment of poly(urethanes) was derived from macrodiol (poly(tetramethylene glycol) with M n = 1000), and 1,6-hexamethylene diisocyanate and 4,4′-cyclohexylmethane diisocyanate were used as diisocyanates. The effect of the structure of side chains located at the hard segments on the formation of hydrogen bonds in comb-shaped poly(urethanes) has been studied by IR spectroscopy. On the basis of DSC measurements, the glass transition temperatures of the soft and hard segments and the temperature and enthalpy of melting of the crystalline phase have been estimated and the microphase separation of segments has been assessed. The mechanical characteristics of the polymers under study have been examined. 相似文献
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A. I. Kovalev Yu. I. Lyakhovetskli M. M. Teplyakov A. L. Rusanov P. V. Petrovskii S. O. Yakushin 《Russian Chemical Bulletin》1993,42(9):1529-1535
The chemical heterogeneity of polyphenylenes obtained by trimerization poiycycio-condensation of acetylaromatic compounds has been investigated by GLC-MS analysis of the products of trimerization cyclocondensation of acetophenone. The mechanism for the formation of side products of the reaction is discussed. The presence of dypnone fragments in the polyphenylene structure results in a decrease in the thermal stability of these polymers.Deceased March, 1993.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1595–1601, September, 1993. 相似文献
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Dmitrii V. Zagorevskii Tatyana V. Volkova Sergey O. Yakushin Boris G. Antipov Yurii S. Nekrasov 《Journal of mass spectrometry : JMS》1991,26(9):748-750
Fragmentation of the acetyl- and propionyl-ferrocenes under electron impact together with the rupture of C? CO bonds, characteristic of ketones, also includes elimination of water and migration of the OH group to the central metal atom, which is due to keto-enol tautomerization of the acyl group in molecular or fragment ions. 相似文献
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