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Summary By fractionating the initial water-soluble polysaccharide from the tuberous roots ofEremurus altaicus, a homogeneous naturally acetylated glucomannan with a molecular weight of 108,000–120,000 has been isolated.On the basis of the results of periodate oxidation and methylation and a study of the products of partial cleavage of the glycosidic bonds, the structure of a repeating heptasaccharide section of the chain consisting of -14-linked D-glucopyranose (2 moles) and D-mannopyranose (5 moles) residues has been established. The glucomannan apparently contains 95–100 such sections. It has been shown that in each repeating solution there is one O-acetyl group at a C3 atom of a glucose residue.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 189–195, March–April, 1977. 相似文献
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N. I. Baram L. Biktimirov S. B. Dzhurabekova F. G. Kamaev A. I. Ismailov 《Chemistry of Natural Compounds》1991,27(3):309-312
Imines of methyl ethers of gossypol have been synthesized for the first time, their structures have been shown, and their immunomodulating activities have been determined. The quinoid form of existence of the imines of the dimethyl ether and the benzoid form of the imine of the mexamethyl ether of gossypol have been shown.A. S. Sadykov Institute of Bioorganic Chemistry, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 358–363, May–June, 1991. 相似文献
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Elgiz Bairamov Rukiye ?zturk Mert Zameddin Ismailov 《Journal of mathematical chemistry》2012,50(5):1100-1110
In this work, firstly in the Hilbert space of vector-functions all selfadjoint extensions of the minimal operator generated by linear singular symmetric differential expression with a selfadjoint operator coefficient A in any Hilbert space H, are described in terms of boundary values. Later structure of the spectrum of these extensions is investigated. 相似文献
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S. G. Mamedova F. M. Sadygov T. M. Il’yasly Z. I. Ismailov 《Russian Journal of Inorganic Chemistry》2009,54(2):319-322
The character of phase interaction in the Ce-Bi-Te ternary system has been investigated by differential thermal, X-ray diffraction,
and microstructural analyses, as well as by the measurement of microhardness and density of alloys. Phase diagrams of eight
polythermal and projection of the liquidus of the Ce-Bi-Te ternary system have been constructed.
Original Russian Text ? S.G. Mamedova, F.M. Sadygov, T.M. Il’yasly, Z.I. Ismailov, 2009, published in Zhurnal Neorganicheskoi
Khimii, 2009, Vol. 54, No. 2, pp. 364–367. 相似文献
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Sh. Yu. Islambekov A. K. Karimdzhanov S. M. Mavlyanov A. I. Ismailov 《Chemistry of Natural Compounds》1990,26(3):239-250
Information is given on vegetable tanning substances, their classification, distribution in the plant world, and structure, and the dependence of their tanning properties on their composition, and also on methods of enriching tanning extracts. The review of literature sources includes publications from 1950 to 1989. 相似文献