Adsorption deformation of a microporous AR-V carbon adsorbent during the adsorption of n-hexanePleiades Publishing Ltd - Tập 85 - Trang 1960-1964 - 2011
V. V. Nabiulin, A. A. Fomkin, A. V. Tvardovskiy
Adsorption isotherms of n-hexane and adsorption deformation isotherms of an AR-V carbon adsorbent are measured in a pressure range of 1 Pa to 20 kPa at temperatures of 254.8–353 K. It is found that, except for the initial pressure range (p < 800 Pa), the relative linear deformation increases with increasing pressure and decreases with increasing temperature. At temperatures of 254.8, 273.2, and 29...... hiện toàn bộ
Nonlinear optical properties of solutions of heavy fullerenes in the near-ultraviolet regionPleiades Publishing Ltd - Tập 85 - Trang 1603-1608 - 2011
V. V. Sherstnev, N. A. Charykov, K. N. Semenov, N. I. Alekseev, V. A. Keskinov, O. A. Krokhina
Nonlinear optical properties (particularly optical limiting) are determined for solutions of heavy fullerenes C76 + C78 + C84 + C90 + …, in the near-ultraviolet region (λ ≈ 280 ± 7 nm). It is shown that no optical limiting is observed in solutions of light fullerenes (C60 and C70), but found in solutions of water-soluble fullerenol-d (a mixture of oxypolyalcohols of fullerene C60-C60(OH)
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Sorption of catechins under conditions of reverse-phase high-efficiency liquid chromatographyPleiades Publishing Ltd - Tập 84 - Trang 1421-1427 - 2010
R. V. Shafigulin, K. V. Egorova, A. V. Bulanova
The physico-chemical principles of catechin sorption from various polar solvents onto silica gel modified with octadecyl groups were studied. Thermodynamic characteristics of the sorption were calculated, and the applicability of different models of retention was demonstrated for catechins under the conditions of reverse-phase high-efficiency liquid chromatography.
Deformation and thermodynamic instability of a C84 fullerene cagePleiades Publishing Ltd - - 2010
A. R. Khamatgalimov, V. I. Kovalenko
Quantum chemical calculations of electronic and geometric structures were performed for molecules of 24 isomers of C84 fullerenes obeying the isolated pentagons rule. The reasons for the instability of isomers not obtained experimentally were established, and the possibility of obtaining some of them was proven. It was shown that the deformation of hexagons and pentagons is the most important geom...... hiện toàn bộ
Removal Mechanisms of Phenanthrene and Benzo(a)pyrene from Wastewater by Combining Bacillus subtilis with FerratePleiades Publishing Ltd - Tập 95 - Trang S242-S251 - 2022
Shuyan Zang, Qian Zhao, Mario Alberto Gomez, Xiaochen Luo, Bo Li, Xiaofeng Wang
A new method that combines Bacillus subtilis (B. subtilis) with K2FeO4 has been developed to enhance the degradation of phenanthrene (Phe) and benzo(a)pyrene (BaP) in wastewater. The results showed that (i) BaP and Phe after pre-oxidation with K2FeO4 were more easily bio-degraded by the cooperating methods, showed faster kinetics and shorter half-life (t1/2); (ii) removal rate of Phe was always hi...... hiện toàn bộ
Method of moving parabolas for determining the compositions of coexisting phases in binary systemsPleiades Publishing Ltd - Tập 89 - Trang 1745-1748 - 2015
A. Yu. Zakharov, A. A. Schneider
A simple and fast method for determining the compositions of coexisting phases in binary systems is proposed and validated. The method is based on the precise determination of common tangents to a sequence of pairs of parabolas approximating the free energy in concave regions separated by convex regions.
Multiplicity of Te–Te Bonds in Tellurium-Containing Lanthanide CompoundsPleiades Publishing Ltd - - 2019
V. N. Serezhkin, M. Albakajaji, L. B. Serezhkina
The structures of 272 compounds containing 337 LnTen coordination polyhedra, where Ln is any lanthanide from La to Lu in the crystals, are analyzed using Voronoi–Dirichlet(VD) polyhedra. It is shown that the parameters of VD polyhedra allow determination of the valence state of Ln atoms. It is established that tellurides contain Ln(II) and Ln(III) atoms bonding from 4 to 9 tellurium atoms that exi...... hiện toàn bộ