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61.
O. S. Kukovinets R. Kh. Mudarisova A. F. Sagitova M. I. Abdullin 《Russian Journal of General Chemistry》2017,87(4):778-781
The reaction of apple pectin modified by organic pharmacophores (nicotinic, salicylic, 5-aminosalicylic, and anthranilic acids) with Cu(II) cations was studied by spectral methods. The compositions of the complexes were determined and their stability constants, as well as the thermodynamic parameters (ΔH 0, ΔG 0, ΔS 0) of the complex formation were calculated. The structure of the drug in the polymeric ligand was found to affect certain physicochemical properties of the metal complexes. 相似文献
62.
V. A. Egorov L. S. Khasanova A. M. Galeeva F. A. Gimalova M. F. Abdullin M. S. Miftakhov 《Russian Journal of Organic Chemistry》2017,53(3):371-373
New functionalized pyrrolidines have been synthesized from accessible amino acids by the [C+NC+CC]-coupling reaction. 相似文献
63.
S. N. Dubovitsky N. G. Komissarova O. V. Shitikova L. V. Spirikhin D. V. Khasanova L. F. Zainullina M. F. Abdullin Y. V. Vakhitova M. S. Yunusov 《Russian Chemical Bulletin》2015,64(6):1335-1340
A new zwitterionic derivative of the lupan pentacyclic triterpenoid series, viz., the sulfobetaine with a 4-(dimethylammonio)butane-1-sulfonate moiety, was synthesized by quaternization of betulin 28-(2-dimethylaminoacetate) with 1,4-butane sultone. The sulfobetaine was found to possess a dose-dependent proliferative effect toward human embrionic kidney cells HEK293 and human T-lymphocytes. Betulin chosen as a comparison compound demonstrated an effect against cells of both the tumor (HepG2, Jurkat) and the normal origin (human HEK293 and T-lymphocytes) which differ from that of the sulfobetaine, inhibiting their proliferation. The new sulfobetaine can prove to be a promising basis for the development of reparative and immunostimulating agents. 相似文献
64.
Yassir Ibrahim Dinar 《Advances in Mathematics》2011,226(6):5018
We obtain polynomial Frobenius manifolds from classical W-algebras associated to regular nilpotent elements in simple Lie algebras using the related opposite Cartan subalgebras. 相似文献
65.
Dinar Abdullin Gregor Hagelueken Robert I. Hunter Graham M. Smith 《Molecular physics》2013,111(6):544-560
Pulsed electron–electron double resonance (PELDOR or DEER) spectroscopy is frequently used to determine distances between spin centres in biomacromolecular systems. Experiments where mutual orientations of the spin pair are selectively excited provide the so-called orientation-selective PELDOR data. This data is characterised by the orientation dependence of the modulation depth parameter and of the dipolar frequencies. This dependence has to be taken into account in the data analysis in order to extract distance distributions accurately from the experimental time traces. In this work, a fitting algorithm for such data analysis is discussed. The approach is tested on PELDOR data-sets from the literature and is compared with the previous results. 相似文献
66.
A method is proposed for the determination of copper and cadmium by atomic absorption spectrometry in a propane-butane-air
flame with electrochemical and sorption preconcentration. Electrochemical preconcentration was performed on metal (tantalum,
titanium, molybdenum, and platinum), glassy-carbon, and spectrographic graphite electrodes. Sorption preconcentration was
performed on filter paper with immobilized dithizone, 8-hydroxyquinoline, and rubeanic acid. It is demonstrated that copper
and cadmium can be determined in water within the concentration range 1–10 ώg/L. 相似文献
67.
68.
The approximation of electron motion along electric field force lines is used to calculate current in diodes with knife-edge and point emitters. The diode current is limited by space charge, with each current tube considered as a diode element with electrodes in the form of coaxial cylinders or concentric spheres. The effect of the cathode cavity in which the emitter is installed upon current magnitude is considered by limiting beam dimensions at the anode.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 3–6, February, 1992. 相似文献
69.
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