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1.
A. Sh. Sharifkanov Sh. S. Akhmedova R. A. Timirova I. S. Chanysheva E. G. Il' yasov 《Chemistry of Heterocyclic Compounds》1971,7(3):326-327
1,4-Bis(2,5-dimethyl-4-hydroxypiperidino)-2-butene and 1,4-bis(2,5-dimethyl-4-hydroxypiperidino)-2-butyne (II and III) were obtained by the action of 1,4-dibromo-2-butene and 1,4-dibromo-2-butyne on the form of 2,5-dimethyl-4-piperidol (I). The benzoates (IV and V) were obtained by acylation of II and III with benzoyl chloride.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 352–353, March, 1971. 相似文献
2.
N. R. Akhmedova O. M. Aliev I. B. Bakhtiyarly 《Russian Journal of Inorganic Chemistry》2006,51(3):478-483
A T-x diagram is designed for the Yb2S3-In2S3 system using physicochemical methods. A complex chemical reaction occurs in the system to yield ternary compounds Yb3InS6 (S1), YbInS3 (S2), Yb3In5S12 (S3), and YbIn3S6 (S4). In2S3-based limited solid solutions are found. Phases S1, S3, and S4 are formed by peritectic reactions at 1260, 1200, and 1100 K, respectively. Compound S2 melts congruently at 1390 K. Compound S3 crystallizes in monoclinic system (a = 10.90 Å, b = 21.01 Å, c = 3.846 Å, β = 96.2°). Compounds S1 and S4 crystallize in orthorhombic system (for S1, a = 16.76 Å, b = 13.70 Å, c = 3.88 Å; for S4, a = 3.86 Å, b = 11.64 Å, c = 20.98 Å, d exp = 4.62 g/cm3). Compound S2 crystallizes in cubic system (a = 10.68 Å). 相似文献
3.
A. M. Gasanaliev G. M. Minkhadzhev B. Yu. Gamataeva P. A. Akhmedova 《Russian Journal of Inorganic Chemistry》2006,51(4):633-638
The four-component system LiF-K2WO4-CaF2-CaWO4 has been studied by physicochemical analysis. The phase and crystallization trees have been predicted a priori and have been experimentally verified by constructing a topological model of the phase diagram and by solving the equations expressing the general law of liquidus surface formation. The heat-storage properties of the eutectic compositions are evaluated. 相似文献
4.
B. A. Mamedov R. A. Akhmedova S. S. Mashaeva M. Sh. Gurbanov A. M. Guliev 《Russian Journal of Applied Chemistry》2013,86(10):1610-1616
Polyconjugated oligomers containing aromatic links with hydroxyl and amino functional groups were synthesized by oxidative polycondensation of 4-aminophenol. They exhibit solubility and fusibility, heat resistant, paramagnetic and semiconductor properties, and also high reactivity in reactions characteristic for aromatic hydroxyl groups. These oligomers were used as supplements to industrial polymers. Composite materials were obtained including a rubber with high physico-mechanical, thermal, and electrical properties. 相似文献
5.
Z. G. Asadov R. A. Ragimov G. A. Akhmedova 《Russian Journal of Applied Chemistry》2011,84(7):1188-1194
We carried out oxypropylation of pentaerythritol with propylene oxide at different molar ratios of reagents under the action
of alkali (NaOH) catalyst. The most important physical and chemical characteristics of the obtained esters were determined
and their properties as surfactants were studied. Based on these data we calculated colloid-chemical and thermodynamic parameters
of micellization and adsorption. 相似文献
6.
A mathematical model of the functioning of an insurance company with allowance for advertising expenses is suggested. The basic characteristics of the capital of the company and the advertising efficiency are examined in the case in which the advertising expenses are proportional to the capital. 相似文献
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8.
Summary The results of a study of the products of the hydrolysis and oxidative cleavage according to Barry of cotton-plant-stem xylan has shown that its main chain consists of 14--L-anhydroxylopyranose units. Each elementary link of the xylan contains 6–7 xylopyranose units and has two side chains formed by residues of D-glucose and D-glucuronic acid, which are attached in position 2 or 3 of the xylose units of the main chain.V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 305–308, May–June, 1973. 相似文献
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We show that the dispersionless limits of the Pfaff–KP (also known as the DKP or Pfaff lattice) and the Pfaff–Toda hierarchies admit a reformulation in terms of elliptic functions. In the elliptic form, they look like natural elliptic deformations of the respective dispersionless KP and two-dimensional Toda hierarchies. 相似文献