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21.
P. M. Kochergin L. A. Reznichenko R. N. Gireva E. V. Aleksandrova 《Chemistry of Heterocyclic Compounds》1998,34(10):1142-1147
A series of 1-alkyl(1,2-dialkyl)-substituted 4-nitro-5-hydroxyalkylamino- and 4-hydroxyalkylamino-5-nitro-imidazoles were
obtained by the reaction of 1-alkyl(1,2-dialkyl)-substituted 4-nitro-5-chloro(bromo)imidazoles with amino alcohols. Their
reactions with thionyl chloride and carboxylic acid halides and their catalytic hydrogenation were studied.
For Communication 96, see [1].
Center of the Chemistry of Medicinal Agents, All-Russia Scientific-Research Chemical-Pharmaceutical Institute, Moscow 119815.
Novokuznetsk Scientific-Research Chemical-Pharmaceutical Institute, Novokuznets 654034, Russia. Zaporozh'e State Medical University,
Zaporozh'e 33074. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10. pp. 1346–1351, October, 1998. 相似文献
22.
T. A. Anokhina S. N. Khadzhiev V. L. Baiburskii I. L. Aleksandrova 《Reaction Kinetics and Catalysis Letters》1986,30(2):303-309
Catalytic and acidic properties of bifunctional catalysts containing faujasite, superhigh-silica zeolite and mordenite have been studied in isomerization of C8-alkylaromatic hydrocarbons.
C8 , , - .相似文献
23.
24.
N. I. Aleksandrova 《Doklady Physics》2014,59(3):129-132
Propagation of unsteady waves under the effect of a step point load on a square lattice of springconnected masses is investigated. The problem is solved by two methods. Asymptotic solutions at large time intervals, which describe the behavior of long-wave perturbations, are derived analytically. The solution over the whole time interval for the waves of the entire spectral range is derived by the finite difference method. These solutions are compared, and their good agreement is shown. 相似文献
25.
26.
Spartak S. Khutsishvili Marina V. Lesnichaya Tamara I. Vakul’skaya Gania Dolmaa Galina P. Aleksandrova Aleksandr L. Rakevich 《光谱学快报》2018,51(4):169-173
Structural peculiarities and supramolecular organization of medicinally promising nanocomposites, synthesized from humic substances, which essentially differ depending on decomposition degree, have been studied using electron spin resonance, transmission electron, and confocal laser scanning microscopy techniques and some other modern physical–chemical methods. It is shown that stable zero-valent gold nanoparticle of about 10–17?nm in size are formed in a natural macromolecular matrix. The nanocomposites obtained turn out to be stable in aggregative state for a long time and preserve their properties that are extremely important for prospective medicinal substances. 相似文献
27.
Boris A. Trofimov Ludmila A. Oparina Lidiya N. Parshina Marina Ya. Khil’ko Anatolii P. Tantsyrev Galina P. Aleksandrova 《Cellulose (London, England)》2013,20(3):1201-1214
Diverse celluloses including non-mercerized and mercerized ones have been successfully vinylated with acetylene in the superbase catalytic systems MOH/DMSO and MOH/THF (M = Na, K) at 85–140 °C. Depending on the reaction conditions, degree of substitution of the hydroxyl groups by highly reactive polymerazable vinyloxy groups ranges 0.11–1.22, the yields of vinylated celluloses (insoluble in water, but soluble in DMSO) being 41–89 %. Vinylated celluloses are easily decomposed under the action of white rot fungi: Phanerochaete chrysosporium, Trametes versicolor and Trametes hirsutus, and can constitute a basis for the preparation of biodegradable polymer materials (due to polymerization or polyaddition at the vinyloxy group). 相似文献
28.
Shirokova L. N. Aleksandrova V. A. Bondarenko G. N. Shandryuk G. A. 《Russian Journal of Applied Chemistry》2020,93(11):1655-1660
Russian Journal of Applied Chemistry - Different forms of 6-О-carboxymethyl chitin were prepared, namely, the salt form containing, the carboxy group in the –COONa form, the acid form... 相似文献
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30.
S. A. Aleksandrova 《Siberian Mathematical Journal》2018,59(5):763-767
We construct a computable real function not Σ-definable in hereditarily finite superstructures over the extensions with decidable theory of the reals. 相似文献