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1.
N. I. Berezina 《Computational Mathematics and Modeling》1992,3(2):207-211
Translated from Metody Matematicheskogo Modelirovaniya i Vychislitel'noi Diagnostiki, pp. 174–180, Izd. Moskovskogo Universiteta, Moscow, 1990. 相似文献
2.
Complexes of Co(II) and Zn(II) with three-membered structures containing 1,3-indanedione, 1,3,4-thiadiazole, and pyridine moieties were obtained. 相似文献
3.
Kulikov M. A. Vorob'ev Yu. G. Berezina G. R. Stepanenko V. A. 《Russian Journal of General Chemistry》2004,74(6):954-956
Novel symmetrical macroheterocyclic compounds were prepared by the reactions of 2,3-dicyanopyridine and 2,3-dicyanopyraine with 2,5-diamino-1,3,4-thiadiazole in butanol in the presence of sodium butylate. Physicochemical properties and biological activity of the products were studied. 相似文献
4.
Shukin V. G. Berezina R. N. Derendyaev B. G. Koptyug V. A. 《Russian Chemical Bulletin》1970,19(12):2583-2586
Russian Chemical Bulletin - 相似文献
5.
The electric transport of solvent ions and molecules through membrane systems containing cations of tetraalkylammonium bases is studied. The interrelation between electrokinetic characteristics of sulfonated cation-exchange membranes at different degrees of their saturation with tetrabutylammonium ions and the content of water in membranes at equilibrium is established. A new type of conductor-insulator percolation transitions is revealed for homogeneous MF-4SK perfluorinated membranes saturated with organic counterions. This transition is interpreted with allowance for the concept of the governing role of narrow channels in the membrane microstructure. The electroosmotic permeability of MF-4SK membranes in solutions of sodium and tetraethylammonium chloride, as well as in their mixtures, is studied. An experimentally observed abnormally high amount of water transferred by tetraethylammonium ions is discussed with allowance for the dynamic hydration characteristics of ions.__________Translated from Kolloidnyi Zhurnal, Vol. 67, No. 4, 2005, pp. 485–493.Original Russian Text Copyright © 2005 by Kononenko, Berezina, Shkirskaya. 相似文献
6.
Bharathi Avula Babu L. Tekwani Narayan D. Chaurasiya NP Dhammika Nanayakkara Yan‐Hong Wang Shabana I. Khan Vijender R. Adelli Rajnish Sahu Mahmoud A. Elsohly James D. McChesney Ikhlas A. Khan Larry A. Walker 《Journal of mass spectrometry : JMS》2013,48(2):276-285
Therapeutic efficiency and hemolytic toxicity of primaquine (PQ), the only drug available for radical cure of relapsing vivax malaria are believed to be mediated by its metabolites. However, identification of these metabolites has remained a major challenge apparently due to low quantities and their reactive nature. Drug candidates labeled with stable isotopes afford convenient tools for tracking drug‐derived metabolites in complex matrices by liquid chromatography‐tandem mass spectrometry (LC‐MS‐MS) and filtering for masses with twin peaks attributable to the label. This study was undertaken to identify metabolites of PQ from an in vitro incubation of a 1:1 w/w mixture of 13C6‐PQ/PQ with primary human hepatocytes. Acquity ultra‐performance LC (UHPLC) was integrated with QTOF‐MS to combine the efficiency of separation with high sensitivity, selectivity of detection and accurate mass determination. UHPLC retention time, twin mass peaks with difference of 6 (originating from 13C6‐PQ/PQ), and MS‐MS fragmentation pattern were used for phenotyping. Besides carboxy‐PQ (cPQ), formed by oxidative deamination of PQ to an aldehyde and subsequent oxidation, several other metabolites were identified: including PQ alcohol, predictably generated by oxidative deamination of PQ to an aldehyde and subsequent reduction, its acetate and the alcohol's glucuronide conjugate. Trace amounts of quinone‐imine metabolites of PQ and cPQ were also detected which may be generated by hydroxylation of the PQ/cPQ quinoline ring at the 5‐position and subsequent oxidation. These findings shed additional light on the human hepatic metabolism of PQ, and the method can be applied for identification of reactive PQ metabolites generated in vivo in preclinical and clinical studies. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
7.
N. M. Berezina Vu Thi Thao D. R. Karimov R. S. Kumeev A. V. Kustov M. I. Bazanov D. B. Berezin 《Russian Journal of General Chemistry》2014,84(4):737-744
Spectral properties and chemical stability of Mn(III), Mn(IV), Fe(III), Fe(IV), and Cu(III) complexes of β-octabromotriphenylcorrole [(β-Br)8(ms-Ph)3Cor], synthesized from β-unsubstituted compounds by their reaction with molecular bromine, were studied. Cyclic voltammetry, electron microscopy, and X-ray spectral microanalysis were used to obtain electrochemical characteristics of metal corroles M(β-Br)8(ms-Ph)3Cor and gain insight into the surface texture of active catalysts on the basis of metal corroles. The electron-acceptor β-bromine substitution in the MCor macrocycle shifts the equilibrium in electron-donor solvents to lower oxidation states of the metals and also stabilizes manganese and destabilizes copper complexes in the protondonor medium HOAc-H2SO4. The electrocatalytic activity of the complexes in the reduction of molecular oxygen depends on the nature of the ligand and increases in the order Mn ≤ Cu ? Fe in the case of β-octabrominated macrocycles. The character of distribution of active centers on the surface of the catalysts was established for the first time. 相似文献
8.
Reaction of 1-imino-2-phenyl-1H-inden-3-amine with 3,3′-dichloro-, 2,2′-disulfo-, and 2,2′-dinitrobiphenyl-4,4′-diamines gave 2 : 1 and 1 : 2 linear condensation products and symmetrical macroheterocycles. The products were characterized by the IR, UV, and 1H NMR data. 相似文献
9.
Berezina E. S. Koz'minykh V. O. Igidov N. M. Shirinkina S. S. Koz'minykh E. N. Makhmudov R. R. Bukanova E. V. 《Russian Journal of Organic Chemistry》2001,37(4):539-546
Pivaloylpyruvamides were obtained by reaction of pivaloylpyruvic acid with ammonia, primary and secondary amines. The amides in solutions exist as an equilibrium tautomeric mixture of ketoenol and minor -diketone forms. The pivaloylpyruvamides under mild conditions react with benzylamine or arylamines to furnish products of substitution at the -carbonyl group, the corresponding amides of (Z)-2-benzylamino- or 2-arylamino-5,5-dimethyl-4-oxo-2-hexenoic acid. The latter also exist in solutions as two tautomers. The amides synthesized possess a biological activity. 相似文献
10.