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81.
M. A. Gladchenko S. D. Razumovskii D. A. Kovalev V. P. Murygina E. G. Raevskaya S. D. Varfolomeev 《Russian Journal of Physical Chemistry B, Focus on Physics》2016,10(3):496-503
The effect of mechanical pretreatment of surplus activated sludge from the wastewater treatment facilities of a plant producing chips (LLC “Frito Lay Manufacturing,” Kashira, Moscow oblast) in a cavitation disintegrator on methane generation in the process of anaerobic conversion is investigated. In laboratory conditions, cavitation disintegration pretreatment of the activated sludge results in a two- to sixfold increase in the transfer of various types of organic materials from the cell suspension into the aqueous phase. It is demonstrated that cavitation pretreatment of the activated sludge makes it possible to produce 31% extra methane as compared to the amount produced from the original sludge. 相似文献
82.
G. Ya. Grodzyuk A. E. Raevskaya A. L. Stroyuk S. Ya. Kuchmii M. Ya. Vortman V. N. Lemeshko V. V. Shevchenko S. V. Chertopalov Yu. V. Kolomzarov V. M. Sorokin 《Theoretical and Experimental Chemistry》2012,47(6):361-366
Colloidal CdS nanoparticles measuring 1.9-2.3 nm and stabilized by guanidine-containing dendrimers were produced. It was established
that such nanoparticles are characterized by photoluminescence in a wide spectral range (2.1-3.2 eV) with an average radiative
lifetime of 55-85 ns depending on the energy of the emitted quanta and also by electroluminescence in the visible region of
the spectrum (1.8-2.8 eV). 相似文献
83.
A. E. Raevskaya A. L. Stroyuk G. Ya. Grodzyuk S. Ya. Kuchmii V. M. Dzhagan V. F. Plyusnin V. P. Grivin 《Theoretical and Experimental Chemistry》2010,46(5):273-278
The dynamics of the radiative recombination of charge carriers in CdS nanoparticles stabilized in aqueous solutions of polyethyleneimine
was studied. It was shown that decay of the photoluminescence of the nanoparticles is characterized by a set of time constants
in the range of 10−1-102ns, while its rate depends on the energy of the radiation quanta. This relationship is interpreted as the result of competition
between the processes of radiative recombination and vibrational dissipation of the excitation energy. 相似文献
84.
Bostan A. I. Pyatnitskii Yu. I Raevskaya L. N. Borisenko M. V. Pryanikova V. G. 《Theoretical and Experimental Chemistry》2002,38(6):363-366
We have studied partial oxidation of methane on V2O5/SiO2 (0.8 mass % V) in a flow-through catalytic fixed-bed reactor. We found that the methane/air ratio in the starting reaction mixture has practically no effect on the selectivity of the process. The dependence of the selectivity on the methane conversion can be described by a model with such reaction parameters as the initial selectivity and the relative reactivity (with respect to methane) of the reaction products. 相似文献
85.
Sen" V. D. Tkachev V. V. Volkova L. M. Goncharova S. A. Raevskaya T. A. Konovalova N. P. 《Russian Chemical Bulletin》2003,52(2):421-426
The platinum(iv) complexes cis,trans,cis-PtIV(RNH2)(NH3)(OH)2Cl2, where R is 2,2,6,6-tetramethyl-1-oxyl-4-piperidinyl (1) or 2,2,5,5-tetramethyl-1-oxyl-3-pyrrolidinyl (2), were prepared by oxidation of the corresponding cis-PtII(RNH2)(NH3)Cl2 complexes with hydrogen peroxide. The reactions are catalyzed by tungstate salts, which makes it possible to carry out oxidation under mild conditions. The resulting complexes were characterized by elemental analysis, HPLC, and IR, UV, and ESR spectroscopy. The structure of complex 1 was established by X-ray diffraction analysis. Complex 1 exhibits the highest antitumor activity in an experimental tumor, viz., in P388 leukemia. The resistance of the tumor to this complex developed much slower than that to Cisplatin. 相似文献
86.
K. M. Gitis N. I. Raevskaya A. V. Zaitsev V. Yu. Borovkov S. B. Kozan G. V. Isagulyants 《Russian Chemical Bulletin》1992,41(9):1547-1550
An investigation has been conducted into the effect of the acid and dehydrogenating functions of an aluminoplatinum catalyst on the synthesis of 2-methylimidazole from ethylenediamine and acetic acid. It has been established that formation of the intermediate 2-methylimidazoline involves the acid Al2O3 centers and its rate of formation is greater than the rate of its subsequent dehydrogenation to 2-methylimidazole on the Pt centers. The symbatic nature of the variations in the 2-methylimidazole yield and the surface area of the platinum in the aluminoplatinum catalyst has been demonstrated.N. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 117913 Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 9, pp. 1992–1996, September, 1992. 相似文献
87.
An investigation has been conducted into the staged synthesis of 2-methylimidazole from ethylenediamine and acetic acid in the presence of a bifunctional aluminoplatinum catalyst. It has been shown that the formation stage of 2-methylimidazoline occurs more quickly on -Al2O3 than its dehydrogenation on the Pt centers. From a comparison of the processes of dehydrogenation of 2-methylimidazoline in the molten phase and in aqueous solution it follows that the water eliminated in the imidazoline formation stage could cause the decrease in activity during the dehydrogenation on the Pt centers. The structures of the secondary and intermediate products have been established for each stage of the process and their formation routes are discussed.N. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 117913 Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 9, pp. 1997–2002, September, 1992. 相似文献
88.
Methods have been developed for obtaining soluble and insoluble dextran carbonates. The addition of the latter to E. coli
L-asparaginase has given water-soluble, gel-like, and insoluble forms of the immobilized enzyme. The influence of the bound
polymer on some physicochemical properties of L-asparaginase has been determined. The antileukemic action of soluble dextran
derivatives of L-asparaginase has shown that their efficiency is greater than that of the native enzyme.
A. Kirkhenshtein Institute of Microbiology, Latvian Academy of Sciences, Riga. Translated from Khimiya Prirodnykh Soedinenii,
No. 3, pp. 432–436, May–June, 1993. 相似文献
89.
LetP n O(h) be the set of algebraic polynomials of degreen with real coefficients and with zero mean value (with weighth) on the interval [?1, 1]: $$\smallint _{ - 1}^1 h(x)p_n (x) dx = 0;$$ hereh is a function which is summable, nonnegative, and nonzero on a set of positive measure on [?1, 1]. We study the problem of the least possible value $$i_n (h) = \inf \{ \mu (p_n ):p_n \in \mathcal{P}_n^0 \} $$ of the measure μ(P n)=mes{x∈[?1,1]:P n(x)≥0} of the set of points of the interval at which the polynomialp n∈P n O is nonnegative. We find the exact value ofi n(h) under certain restrictions on the weighth. In particular, the Jacobi weight $$h^{(\alpha ,\beta )} (x) = (1 - x)^\alpha (1 + x)^\beta $$ satisfies these restrictions provided that ?1<α, β≤0. 相似文献
90.
A. S. Emelyanov S. I. Raevskaya F. I. Savenko I. P. Raevski M. A. Malitskaya E. I. Sitalo 《Bulletin of the Russian Academy of Sciences: Physics》2009,73(1):123-124
It is established that, as a result of application of even a small (∼0.5 kV cm−1) bias field E, the maximum of the piezoelectric coefficient d
31 in (1 − x)Pb(Mg1/3Nb2/3)O3 − xPbTiO3(x = 0.06, 0.13) crystals shifts from the Vogel-Fulcher temperature to the critical point in the E-T phase diagram of a given composition. The field dependence of the d
31(T) peak magnitude has a maximum near the E values corresponding to the critical point.
Original Russian Text ? A.S. Emelyanov, S.I. Raevskaya, F.I. Savenko, I.P. Raevski, M.A. Malitskaya, E.I. Sitalo, 2009, published
in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2009, Vol. 73, No. 1, pp. 132–133. 相似文献