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1.
Berezkin Victor G. Mardanov Robert G. Moiseew Aleksey A. Malinowska Irena Różyło Jan K. 《平面色谱法杂志一现代薄层色谱法》2002,15(5):377-379
JPC – Journal of Planar Chromatography – Modern TLC - 相似文献
2.
S. A. Talipov B. T. Ibragimov K. M. Beketov Sh. Yu. Islambekov R. G. Mardanov A. I. Ismailov 《Chemistry of Natural Compounds》1995,31(6):685-689
The results are given of an x-ray structural investigation of hemigossypolone isolated from the stems of a wiltinfected cotton plant and of gossypolone obtained by oxidizing gossypol. 相似文献
3.
V. G. Berezkin A. A. Korolev I. V. Malyukova R. G. Mardanov 《Russian Chemical Bulletin》1997,46(12):2064-2073
The effects of the carrier gas nature and pressure on the relative retention values of organic compounds were studied using
a series of capillary columns differing in the film thickness of the polar stationary phase (PEG-20M). Relative retention
depends linearly on the carrier gas pressure. This dependence becomes more pronounced in the following order of carrier gases:
helium < nitrogen < carbon dioxide. The limiting relative retention at a carrier gas pressure approaching zero rather than
relative retention values measured experimentally (relative retention time, Kovats retention index,etc.) is an invariant characteristic of a compound subjected to chromatography. For the carrier gases studied, the limiting retention
values almost does not depend on the nature of the carrier gas used. The limiting indicating the complex absorption-adsorption
nature of these parameters. Dissolution of a carrier gas in the stationary liquid phase has an effect on the relative retention.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2177–2186, December, 1997. 相似文献
4.
A method for preconcentration of poorly volatile impurities by continuous thermodesorption of the major component on a TLC
plate is proposed. The method provides multiple (200–500) concentration of the organic impurities present in the initial solution.
A simple device for such concentration is suggested.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2075–2076, October, 1998. 相似文献
5.
A. I. Ismailov Z. Shukurov S. A. Talipov F. G. Kamaev R. G. Mardanov B. T. Ibragimov 《Chemistry of Natural Compounds》1994,30(1):42-48
A new compound, which we have called gossindan, has been isolated from the products of the oxidation of gossypol by oxygen in an alkaline medium. The structure of gossindan has been established on the basis of a study of IR, mass, PMR, and13C NMR spectra and x-ray structural analysis as 6,6-di-(2,7-dihydroxy-3-isopropyl-5-methylindan-1-one).A. S. Sadykov Institute of Bioorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Fax 627071. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 50–58, January–February, 1994. 相似文献
6.
An optimal control problem with a control delay is considered, and a more broad class of singular (in classical sense) controls is investigated. Various sequences of necessary conditions for the optimality of singular controls in recurrent form are obtained. These optimality conditions include analogues of the Kelley, Kopp–Moyer, R. Gabasov, and equality-type conditions. In the proof of the main results, the variation of the control is defined using Legendre polynomials. 相似文献
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8.
We consider the problem of analytic continuation of a solution to the system of Maxwell equations in a bounded spatial domain from data on part of the boundary of the domain. We construct an approximate solution to the problem using the Carleman matrix method. 相似文献
9.
Transport in Porous Media - The two key parameters of the Brinkman’s model for fluid flow in porous media—permeability and effective viscosity—are determined theoretically. The... 相似文献
10.
Dzh. I. Mardanov 《Ukrainian Mathematical Journal》1992,44(5):642-645
Sufficient conditions are found for the existence of an integral manifold of solutions.Translated from Ukrainskii Matematcheskii Zhurnal, Vol. 44, No. 5, pp. 709–712, May, 1992. 相似文献