Zobrazeno 1 - 10 of 67 pro vyhledávání: '"I. V. Efimova"'
1
Effect of the Polarity of the Medium on the Kinetics of the Radical-Chain Oxidation of Cumene in the Presence of Ascorbic Acid
Autor: I. V. Efimova, O. V. Smirnova, I. A. Opeida
Publikováno v: Russian Journal of Physical Chemistry A. 93:661-664
The inhibition of the initiated oxidation of cumene by oxygen under homophase conditions, where acetonitrile or dimethylsulfoxide are used as the solvent, by ascorbic acid is studied. The kinetics of the oxidation process is investigated via a gas vo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::28c87900f9a66dad77d4c743d3743a4d
https://doi.org/10.1134/s0036024419040113
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3
Acylation of humic acids
Autor: V. I. Rybachenko, S. L. Khil’ko, R. G. Semenova, O. V. Smirnova, V. S. Berezhnoi, I. V. Efimova
Publikováno v: Solid Fuel Chemistry. 49:206-212
A method for the chemical modification of humic acids with benzoyl chloride under the conditions of phase-transfer catalysis was developed. It was demonstrated by potentiometric titration that the reaction of humic acids with benzoyl chloride can occ
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::317365e119c0f6b34f4b277779924bf3
https://doi.org/10.3103/s0361521915040047
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4
Oxidation of cumene in an aprotic medium in the presence of ascorbic acid
Autor: I. V. Efimova, O. V. Smirnova, I. A. Opeida
Publikováno v: Russian Journal of Physical Chemistry A. 89:963-967
The process of the initiated oxidation of cumene (IPB) with oxygen under homophase conditions in the presence of ascorbic acid (AA) used over a wide range of concentrations is studied. It is shown that in this system, ascorbic acid is consumed in two
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b4238a045f192dc7c81f7e59efa0f004
https://doi.org/10.1134/s0036024415060278
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5
Antioxidant properties of hymatomelanic acids from brown coal
Autor: S. L. Khil’ko, V. S. Berezhnoi, I. V. Efimova, V. I. Rybachenko, O. V. Smirnova
Publikováno v: Solid Fuel Chemistry. 47:193-196
The antioxidant activity of a low-temperature fraction of hymatomelanic acids from brown coal in a model process of the radical chain oxidation of cumene was determined using a gas-volumetric method. Their antiradical activity was evaluated by spectr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bb86715ac983a081e2e49708ab42aef7
https://doi.org/10.3103/s0361521913040058
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6
Antioxidant activity of humic acids in radical-chain oxidation processes
Autor: S. L. Khil’ko, I. V. Efimova, O. V. Smirnova
Publikováno v: Russian Journal of Applied Chemistry. 85:1351-1354
The behavior of humic acids in radical-chain oxidation processes was examined by the gas-volumetric method using model hydrocarbons (cumene and ethylbenzene). It was shown that the liquid-phase oxidation of hydrocarbons is inhibited in the presence o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e74c133c2bde513868d915e28df4d32f
https://doi.org/10.1134/s1070427212090091
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7
Antioxidant and pro-oxidant activity of ascorbic and humic acids in radical-chain oxidation processes
Autor: I. V. Efimova, S. L. Khil’ko, O. V. Smirnova
Publikováno v: Russian Journal of Applied Chemistry. 85:252-255
Joint action of ascorbic and humic acids in radical-chain oxidation of model hydrocarbons was studied. This effect is promising for development of complex directed-action preparations with controllable redox properties and development of antioxidants
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::53b4e9487e8a0f0a1a212a7faedc929b
https://doi.org/10.1134/s1070427212020164
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8
Antioxidant properties of humic acids from brown coal
Autor: I. V. Efimova, O. V. Smirnova, S. L. Khil’ko
Publikováno v: Solid Fuel Chemistry. 45:367-371
It was demonstrated by a gas-volumetric method that humic acids from brown coal exhibit pronounced antioxidant properties, being the effective inhibitors of the model reactions of initiated radicalchain oxidation of hydrocarbons (cumene and ethylbenz
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eb080fc30cb25ff3c5d642effe1d5001
https://doi.org/10.3103/s036152191106005x
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9
Reactions between a superoxide anion and alkyl bromides in dimethyl sulfoxide
Autor: A. I. Pomeshchenko, O. M. Zarechnaya, I. V. Efimova, I. A. Opeida, A. F. Dmitruk
Publikováno v: Russian Journal of Physical Chemistry A. 85:1737-1741
The activation parameters of the reactions between a superoxide anion (O 2 ·− ) and alkyl bromides are measured. An ab initio study of the transition states for various mechanisms of this reaction is performed. The mechanism of radical separation
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::324f813af168a74a9cb02937a89429d6
https://doi.org/10.1134/s0036024411100189
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10
Oxidation of cumene in the presence of high concentrations of ascorbic acid
Autor: O. V. Smirnova, I. A. Opeida, I. V. Efimova
Publikováno v: Russian Journal of Applied Chemistry. 84:427-430
Initiated oxidation of cumene by oxygen in the presence of ascorbic acid was studied. ORGANIC SYNTHESIS AND INDUSTRIAL ORGANIC CHEMISTRY ISSN 1070-4272, Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 3, pp. 427–430. © Pleiades Publishing
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e116aaa1082381f82f605151b8b3757f
https://doi.org/10.1134/s1070427211030165
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