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1.
A method was developed for the determination of largest Lyapunov index for short chaotic time sequences with allowance for
the presence of noise in the response of the system. For this purpose a simple unidimensional representation modelling the
dynamics of irregular self-oscillations was investigated. Conditions were found for adequate determination of the largest
Lyapunov index from the noise-distorted signals. The results were used to obtain the largest Lyapunov index for the Belousov—Zhabotinskii
reaction taking place in an ideal-mixing closed reactor and in a constant-mixing flow-type reactor.
Institute of Organic Chemistry, National Academy of Sciences of Ukraine. Translated from Teoreticheskaya i éksperimental’naya
Khimiya, Vol. 33, No. 3, pp. 136–142, May–June, 1997. 相似文献
2.
L. P. Tikhonova T. S. Ivashchenko P. E. Strizhak 《Theoretical and Experimental Chemistry》1993,28(3):213-216
It was shown that a binuclear complex of composition [Cr2(OH)2(bpy)4]3+ acts as a reaction catalyst in the oscillating chemical system bromate-malonic acid-compound of chromium with 2,2 bipyridyl. The catalytically active compound was investigated by fast-atom-bombardment mass spectrometry, electron and EPR spectroscopies, and cerimetric analysis. The formal redox potential of such a complex E0 was obtained by cyclic voltammetry as +0.72 V.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 28, No. 3, pp. 266–270, May–June, 1992. 相似文献
3.
We have analyzed experimental data on the time dependence of the potentials of 16 platinum point-contact electrodes for spatiotemporal chaos in the Belousov-Zhabotinskii reaction. We show that the largest Lyapunov exponent is a convenient characteristic for spatiotemporal chaos. We found that in going from temporal to spatiotemporal chaos, the embedding dimension of the system increases by a factor of three. We have observed that as the largest Lyapunov exponent increases, we observe a decrease in the degree of spatial correlation of the process.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 31, No. 1, pp. 34–39, January–February, 1995.We would like to thank the Foundation for Basic Research of the State Science and Technology Committee of Ukraine for financial support of this work (Project 3.3/87). 相似文献
4.
K. B. Yatsimirskii P. E. Strizhak V. V. Pavlishchuk 《Theoretical and Experimental Chemistry》1989,25(6):679-683
ESR measurements have been made on complexes formed by copper(II) with [12]anS4, [13]anS4, iso-[14]anS4, and [18]anS6; they show intramolecular reduction for the central ion by electron transfer from the donor sulfur atoms, and free cation-radicals are formed in solution. The covalency parameter 2 indicates that the copper-sulfur bonds are mainly covalent. The electronic structures are analogous to those of the active centers in copper-bearing blue proteins.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 25, No. 6, pp. 737–742, November–December, 1989. 相似文献
5.
G. R. Kosmambetova V. I. Gritsenko P. E. Strizhak A. M. Korduban 《Theoretical and Experimental Chemistry》2006,42(2):133-138
We have studied the catalytic properties of copper-cerium oxide catalysts, supported on zirconium, aluminum, titanium, and
manganese oxides, in the reaction of selective oxidation of CO in hydrogen-rich mixtures. We have shown that the high activity
and selectivity of catalysts supported on zirconium and aluminum oxides is connected with the presence of (in addition to
divalent copper) higher amounts of copper in the (+1) oxidation state in the catalysts.
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Translated from Teoreticheskaya i éksperimental’naya Khimiya, Vol. 42, No. 2, pp. 119–124, March–April, 2006. 相似文献
6.
In a Ferroin-catalyzed oscillatory Belousov-Zhabotinskii reaction, the temperature dependences of the largest Lyapunov exponent (LLE) and the induction period for a chaotic regime to appear are linear in the 285–308 interval when plotted on Arrhenius coordinates. For the LLE, the activation energies calculated for different concentrations of the catalyst are in the 82–126 kJ/mole interval, and for the induction period in the 61–95 kJ/mole interval. On the basis of the experimental data, it has been concluded that this autooscillatory chemical system, within a narrow range of catalyst concentrations, is relatively insensitive to random, small, external perturbations.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 29, No. 2, pp. 186–190, March–April, 1993.The authors wish to thank K. B. Yatsimirskii, Academician of the Academy of Sciences of Ukraine, for discussing the data obtain in this work. 相似文献
7.
G. R. Kosmambetova P. E. Strizhak É. M. Moroz T. E. Konstantinova A. V. Gural’skii V. P. Kol’ko V. I. Gritsenko I. A. Danilenko O. A. Gorban 《Theoretical and Experimental Chemistry》2007,43(2):102-107
The morphological and catalytic properties of samples of nanomeric zirconium dioxide, stabilized with yttrium oxide, manufactured
via the effect of a UHF field during the process of drying precipitated zirconium hydroxide and calcination at temperatures
from 300 to 1000 °C, were studied. It was shown that the highest activity in the oxidation of CO occurred with 40 nm particles
of zirconium dioxide prepared at 1000 °C.
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Translated from Teoreticheskaya i éksperimental’naya Khimiya, Vol. 43, No. 2, pp. 96–101, March–April, 2007. 相似文献
8.
Methane oxidative carbonylation catalyzed by rhodium chalcogen halides over carbon supports 下载免费PDF全文
G. R. Kosmambetova P. E. Strizhak V. I. Gritsenko S. V. Volkov L. B. Kharkova O. G.Yanko O. M. Korduban 《天然气化学杂志》2008,17(1):1-7
Gas phase carbonylation of methane is studied in the presence of molecular oxygen over pure carbon carriers and carbon supported rhodium chalcogen halides. Activated carbons and fullerene blacks have been used as carbon supports. XPS and IR-spectroscopy data show the formation of rhodium chalcogen halides in solids prepared by different methods. We have found that the productivity of acetic acid by carbon supported rhodium chalcogen halides depends strongly on the carbon carrier and the method of the catalyst preparation. Namely, the catalyst with highest productivity for the acetic acid is prepared by synthesizing the rhodium chalcogen halide over the carbon support followed by thermal destruction. We have also found that rhodium chalcogen halides over activated carbons are more active compared with fullerene supported catalysts. 相似文献
9.
10.
L. Yu. Dolgikh I. L. Stolyarchuk P. E. Strizhak A. V. Shvets V. G. Il’in 《Theoretical and Experimental Chemistry》2006,42(1):37-42
The dependence of the activity and selectivity of ion-exchanged forms of zeolite X with incorporated cesium process in alkylation
of toluene with methanol in the side chain on the nature of the ion-exchanged cations (Na+, Cs+, Mg2+, Zn2+) has been established. It is shown that introduction of Mg2+ and Zn2+ in combination with Cs2CO3 significantly increased the yields of ethylbenzene and styrene in comparison with their yields on alkali forms of zeolite
X.
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Translated from Teoreticheskaya i éksperimental’naya Khimiya, Vol. 42, No. 1, pp. 33–38, January–February, 2006. 相似文献