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61.
B. V. Fenelonov E. A. Ustinov V. A. Yakovlev Ch. N. Barnakov M. S. Mel’gunov 《Kinetics and Catalysis》2007,48(4):599-602
The prospects of carbon adsorbents as vehicular hydrogen storage media are briefly discussed. 相似文献
62.
P. Potera S. Ubizskii YA. Zhydachevskii D. Sugak Solskii T. Lukasiewicz 《辐射效应与固体损伤》2013,168(12):821-824
The present work is devoted to investigation of optical absorption in pure and neodymium-doped YAlO3 (YAP) single crystals in the spectral range 0.2–1.1 μm induced by the influence of 12C ions irradiation with energy 4.50 MeV/u (MeV per nucleon) and a fluence 2 × 109 cm?2 or of 235U ion irradiation with energy 9.35 MeV/u and a fluence 5 × 1011 cm?2. The induced absorption in the case of 12C ions irradiation is caused by recharging of point growth defects and impurities under the radiation influence. After irradiation by 235U ions with fluence 5 × 1011 cm?2 the strong absorption rise is probably caused by contribution of the lattice destruction as a result of heavy ion bombardment. 相似文献
63.
V. N. Kravchenko N. YA. Minina A. M. Savin I. V. Berman O. P. Hansen C. B. Sorensen 《高压研究》2013,33(2):305-308
Anisotropy of the piezoresistance relaxations has been observed in p -(0 0 1)GaAs/Al 0.5 Ga 0.5 As heterostructures. The character of relaxation process depends on the direction of the applied uniaxial compression: after loading along [1 m 1 0] direction the specimen resistance relaxes down to the lower magnitude while after loading along [1 1 0] direction it relaxes up to the higher magnitude. Shubnikov-de Haas oscillations and Hall effect measurements indicate that variation of the carrier concentration j N in the quantum well during relaxation processes has different signs for uniaxial compression along [1 m 1 0] and [1 1 0] directions and correlates with the corresponding change of the resistance. The piezoelectric field that in GaAs can reach the magnitude E =1.152 2 10 6 V/m at uniaxial stress P =1 kbar along d 1 1 0 ¢ directions is supposed to be responsible for the metastable state after loading (unloading) and redistribution of carriers during the relaxation process. 相似文献
64.
65.
L.?V.?IlkevichEmail author T.?B.?Tkachenko A.?V.?Samarov A.?A.?Burtsev S.?A.?Sozinov L.?M.?Hitsova A.?N.?Popova Ch.?N.?Barnakov A.?P.?Kozlov 《Russian Chemical Bulletin》2018,67(6):986-990
Graphene oxide was obtained from expanded graphite according to the modified Hummers method. The reaction time was significantly reduced (from 24 to 8 h) by applying the expanded graphite in the oxidation process. The interlayer distance in obtained samples was equal to 0.70–0.74 nm. Structural features of the material were studied by the powder X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, transmission electron microscopy, XPS spectroscopy, and NMR spectroscopy. 相似文献
66.
Yu. G. Osokin M. YA. Grinberg V. Sh. Feldblyum O. A. Yasinskii V. V. Plachtinskii E. R. Kofanov V. A. Ustinov G. S. Mironov 《Reaction Kinetics and Catalysis Letters》1978,9(2):189-192
The isomerization kinetics of 5-vinylbicyclo [2,2,1]-hept-1ene to 5-enthylidenbicyclo [2,2,1] hept-2-ene in the presence of iron pentacarbonyl and parasubstituted anilines has been investigated. The kinetic data correlate with -constants of the substitutes according to Jaffe.
5- [2,2,1]-2- 5- [2,2,1] -2- - . - .相似文献
67.
The paper considers the dynamic process of contact interaction of infinite impulse-loaded strips arranged with a gap. The
behavior of the strips is described by linear elastic dynamics equations. The contact problem is solved by the collocation
method. The process of impact of two and three strips is analyzed. The calculation results are compared with data obtained
by using the finite-element method. 相似文献
68.
反相高效液相色谱法测定棒柄花中反式-4-(1-丙烯基)苯酚-β-D-吡喃葡萄糖苷 总被引:1,自引:1,他引:0
用反相高效液相色谱法建立棒柄花中反式-4-(1-丙烯基)苯酚-β-D-吡喃葡萄糖苷的含量测定方法,并测定其含量。色谱柱Reliasil-C18(250 mm×4.6 mm,5μm),流动相乙腈-水(体积比22∶78),流速1.0mL/m in,检测波长257 nm。结果待测组分在0.080 4~0.281 4μg范围内与峰面积线性关系良好,相关系数为0.999 5,平均加标回收率为98%,RSD为1.8%(n=6)。本法简便、快速、重复性好、结果准确可靠。 相似文献
69.
In this paper we generalize the definition of Levy flight (LF). With the help of a useful definition for the critical exponents of LF by introducing the concept of cutoff steplength, we calculate analytically the exponents of FDLFs in arbitrary d dimensions, utilizing the generating function method. 相似文献
70.
The derivative nonlinear Schrodinger equation for the low frequency circular polarized wave, propagating parallel to the bias magnetic field in a ferromagnetic system, is derived by the reductive perturbation expansion method. 相似文献