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1.
It is demonstrated theoretically that the initial (both elastic and viscous) magnetic susceptibility components for nanocrystalline
magnets caused by the processes of rotations (in the region of linear response) have resonant rather than relaxation character
typical already for the susceptibility component caused by displacements of domain boundaries.
__________
Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 88–92, June, 2007. 相似文献
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L. A. Oparina O. V. Vysotskaya A. V. Stepanov I. V. Rodionova G. F. Myachina N. K. Gusarova B. A. Trofimov 《Russian Journal of Organic Chemistry》2008,44(1):120-123
2-Hydroxymethylfuran reacted with acetylene in superbasic catalytic systems MOH-DMSO (M = Na, K) under mild temperature conditions (75–85°C, 1–2 h), yielding 80% of 2-vinyloxymethylfuran. The product, as well as acetaldehyde acetals derived therefrom, turned out to be promising as modifiers for electrolyte in lithium-sulfur rechargeable batteries. 相似文献
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M. S. Dudkin N. A. Rodionova I. S. Kazanskaya I. V. Gorbacheva E. I. Kozarez N. A. Denisyuk 《Chemistry of Natural Compounds》1981,16(4):338-342
The enzymatic hydrolysis of a 4-0-methylglucuronoxylan of white sweetclover (Melilotus albus) by a highly purified homogeneous endo-1, 4--xylanase fromAspergillus niger 14 has shown that the enzyme hydrolyzes 97% of the polysaccharide in 72 h. Acidic and neutral oligosaccharides were found in the hydrolysate after the action of the enzyme. An investigation of the hexauronic acid isolated has shown that the glucuronic acid is attached to the nonreducing end of the xylooligosaccharide, which demonstrates the specific action of the enzyme on the polysaccharide.M. V. Lomonosov Odessa Technological Institute of the Food Industry. A. N. Bakh Institute of Biochemistry, Academy of Sciences of the USSR, Moscow. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 477–483, July–August, 1980. 相似文献
7.
G. F. Myachina E. N. Sukhomazova S. A. Korzhova I. V. Rodionova E. N. Deryagina 《Russian Journal of Applied Chemistry》2007,80(3):386-388
Redox-active sulfurized poly(methylene polysulfides) ?[CH2S y ] n ? (y = 4–22) were prepared by deep sulfurization of poly(methylene di- and trisulfides) with elemental sulfur. The use of the substances obtained as an active cathode material of rechargeable lithium cells ensures their cycling with a specific discharge capacity of 418–550 mA h g?1. 相似文献
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B. A. Trofimov A. G. Mal’kina I. A. Dorofeev G. F. Myachina I. V. Rodionova T. I. Vakul’skaya L. M. Sinegovskaya T. A. Skotheim 《Russian Journal of General Chemistry》2007,77(9):1559-1566
Oligosulfides derived from ethyne-1,2-dithiol were synthesized in up to 96% yield via insertion of elemental sulfur into the Na-Csp bond of sodium acetylides (HC≡CNa, NaC≡CSNa) in liquid ammonia, followed by hydrolysis and spontaneous oligomerization of ethynethiols, ethynedithiols, and mono-and bis-(polysulfanyl)ethynes (HC≡CSH, HSC≡CSH, HC≡CSxH, HSxC≡CSyH). The resulting polyenic oligosulfides were isolated as brown powders melting in the temperature range from 122 to 203°C and containing up to 77% of sulfur; they are sparingly soluble in organic solvents and are high-resistance semiconductors (10?13–10?14 S cm?1) possessing paramagnetic (1017–1018 spin g?1) and redox properties. According to the data of IR and ESR spectroscopy and cyclic voltammetry, the oligomers obtained consist mainly of different oligosulfide units, including oligothienothiophene structures. They also ensure a high discharge capacity (345–720 mA h g?1) of lithium sulfur rechargeable batteries. 相似文献
9.
The method of successive estimation of regression parameters, which is widely used in nonlinear regression analysis, is applied to obtain kinetic information from spectral data for the case when the spectra of individual components are unknown. Using a model example with a two-step successive reaction, the reliability of the algorithm is demonstrated. To compare the proposed method with other known methods for estimating kinetic parameters literature data are used. All simulations were done using a new software for nonlinear regression analysis: FITTER. The proposed approach is especially useful when the spectra of reaction components are unknown and when formal calibration methods do not provide desirable accuracy. 相似文献
10.
S. A. Azimov M. L. Allaberdin Kh. Kh. Artykov S. O. Edgorov Sh. V. Inogamov B. B. Levchenko V. D. Lipin S. L. Lutpullaev K. Olimov T. P. Rodionova K. T. Turdaliev A. A. Yuldashev B. S. Yuldashev M. M. Muminov I. Suvanov Z. Trka 《Czechoslovak Journal of Physics》1985,35(9):920-934
Data on the multiplicity, momentum and angular spectra of fastp
n1 GeV/c) neutrons produced in inelastic interactions of protons with neon nuclei and protons at 300 GeV/c are presented. The experimental results obtained for p20Ne interactions are compared with predictions of the additive quark model in which the intranuclear cascading of slow particles is taken into account.We thank V. G. Grishin and R. J. Loveless for valuable discussions. 相似文献