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21.
Substantial computational resources and time are needed for computer simulation of the corona discharge with allowance for the sheath processes. This circumstance necessitates a search for and development of simplified models in which the processes in the sheath of corona discharge are reduced to the boundary condition at the surface of active electrode. A unipolar model that takes into account only one type of carriers is considered, and the boundary condition on the discharge electrode describes the rate of variations in the electron-flux density from the sheath. The calculated I–V characteristics are compared with experimental data for interelectrode distances ranging from several millimeters to several centimeters to reveal the applicability of the model. The simulated and experimental results are in good agreement at interelectrode distances of greater than 1 cm. 相似文献
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I. A. Bessonova L. N. Samusenko M. S. Yunosov M. R. Yagidaev V. G. Kondrat'ev 《Chemistry of Natural Compounds》1991,27(1):79-81
The new C20-diterpene alkaloid acoridine has been isolated from the epigeal part ofAconitum coreanum (Levl.) Rapaics, and the structure of 14-hydroxy-2-propionylhetisine has been established for it on the basis of spectral characteristics. Acoridine is the first diterpene alkaloid esterified by propionic acid.Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 91–93, January–February, 1991. 相似文献
24.
A.?Yu.?Kashner I.?V.?Dyachenko Yu.?V.?Samusenko Yu.?I.?Rozhinskii V.?D.?DyachenkoEmail author 《Russian Journal of Organic Chemistry》2018,54(7):1071-1075
New substituted naphthostyryl derivatives have been synthesized by nucleophilic vinylic substitution reactions and converted to the corresponding N-alkyl derivatives by treatment with alkyl halides. 相似文献
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A. P. Karishin Yu. V. Samusenko L. A. Solomakha D. I. Osobik 《Chemistry of Heterocyclic Compounds》1969,3(4):190-194
Acenaphthenequinone and its derivatives readily condense with 3-phenyl-, 3-p-tolyl-, 3-(4-methoxyphenyl)-, 3-(2-methoxyphenyl)-, 3-(4-ethoxyphenyl)rhodanines. The UV absorption spectra of these compounds in dioxane lie in the range 363–390 m. Replacement of oxygen by sulfur at position 2 in the thiazolidine ring gives rise to a 14 to 41 m bathochromic shift. 相似文献
27.
The partial molar free energy, enthalpy, and entropy of sorption of C11−C23
n-alkanes were calculated on the basis of the GC data obtained on the glass capillary column coated with fullerene C60 (Ful-60) as stationary phase. The thermodynamic parameters ofn-alkane sorption on a column with Ful-60 and a fused silica capillary column with polydimethylsiloxane OV-1 were determined
and compared. The enthalpy-entropy compensation effect for the sorption ofn-alkanes on Ful-60 and OV-1 was found. A linear dependence of the partial molar free energy ofn-alkane sorption on the temperature of analysis and carbon chain length was found. The free energy contributions of the methylene
groups were calculated, and their temperature dependences were studied. The differences in the temperature dependences of
the energy contributions of methylene groups ofn-alkanes on Ful-60 and OV-1 were revealed. The entropy contribution is 68–82% of the enthalpy contribution which indicates
a substantial role of the number of contacts with Ful-60 in retention ofn-alkanes. The ability of Ful-60 for dispersive interactions is similar to those of nonpolar liquid phases and substantially
differs from that for carbon adsorbents. Fullerene columns were shown to be convenient for analysis of highly boiling organic
substances in aqueous and organic solutions.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1490–1495, August, 1999. 相似文献
28.
In this paper, we suggest a method for the construction of asymptotic formulas for solutions of systems of differential equations
in the case where the roots of the characteristic equation are simple
Ukrainian Pedagogical University, Kiev. Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 48, No. 9, pp. 1278–1285,
September, 1996. 相似文献
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