全文获取类型
收费全文 | 64篇 |
免费 | 0篇 |
专业分类
化学 | 23篇 |
晶体学 | 1篇 |
数学 | 23篇 |
物理学 | 17篇 |
出版年
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 2篇 |
2018年 | 1篇 |
2017年 | 1篇 |
2016年 | 3篇 |
2014年 | 1篇 |
2013年 | 5篇 |
2012年 | 2篇 |
2011年 | 1篇 |
2010年 | 5篇 |
2009年 | 1篇 |
2008年 | 1篇 |
2007年 | 4篇 |
2006年 | 5篇 |
2005年 | 6篇 |
2003年 | 2篇 |
2002年 | 1篇 |
1999年 | 2篇 |
1998年 | 4篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1981年 | 1篇 |
1979年 | 2篇 |
1977年 | 1篇 |
排序方式: 共有64条查询结果,搜索用时 15 毫秒
21.
22.
Yu.B. Vassiliev V.S. Bagotzky N.V. Osetrova A.A. Mikhailova 《Journal of Electroanalytical Chemistry》1979,97(1):63-76
The promoting action of tin in the binary system platinum tin has been studied. A direct correlation of polarization and adsorption measurements has been carried out using an adsorption method of applying the promoter. The method of fast potentiodynamic pulses has been used to control the amount of tin and organic species on the surface. Studies have been made with smooth and platinized electrodes on the adsorption and oxidation of formic acid and methanol. A comparison of electro-oxidation rates at constant organic species coverage has made it possible to reveal the true catalytic effect as a result of introduction of tin. This effect has been found to be independent of both the nature of the substance under oxidation and the state of the electrode surface (smooth or rough). The promoting effect of tin is observed in the reactions where the limiting stage is represented by R+OHads; in the reactions where the limiting stage is represented by electron transfer or else the interaction R+Hads, the promoting effect of tin does not show up, which fact points to the selectivity of its catalytic action. 相似文献
23.
V.S. Bagotzky Yu.B. Vassiliev O.A. Khazova 《Journal of Electroanalytical Chemistry》1977,81(2):229-238
A generalized scheme of successive stages for chemisorption, electrooxidation and electroreduction of simple organic compounds from methane to CO2 on platinum group metals has been developed on the basis of experimental data. The actual pathway of electrooxidation or electroreduction of an organic compound and the yield of the reaction products depend on the ratio between the rates of individual steps which, in their turn, are determined by various factors (potential, temperature, coverage of the surface with Hads and OHads, with reacting and intermediate organic particles, as well as with foreign particles). The accumulation of chemisorbed compounds on the electrode surface depends on the relationship between the rates of their formation and subsequent transformation. 相似文献
24.
L. V. Pugolovkin S. Yu. Vassiliev M. I. Borzenko V. K. Laurinavichyute G. A. Tsirlina 《Russian Chemical Bulletin》2013,62(6):1317-1322
The ionic composition of long-lived metastable aqueous solutions of oxo compounds of tungsten(IV) with pH ≤ 1 was studied by spectrophotometry. The nature of some isopolytung-states formed in these solutions in the presence of various inorganic acids (HCl, HClO4, HNO3, H2SO4, and H2SeO4) was established. 相似文献
25.
26.
27.
The possibility of detecting J/Ψ → e + e ? decays produced in the Compressed Baryonic Matter (CBM) experiments in Au-Au collisions at a beam energy of 25 GeV/nucleon is studied. Special selection criteria are formulated and the optimal target thickness is identified in order to facilitate the selection of signal events in the presence of a dominant background. An efficient method for determining the rejection boundaries for the mentioned selection criteria is proposed. It is shown that the criteria used make it possible to accumulate sufficient J/Ψ → e + e ? decay statistics in a fast and reliable way. 相似文献
28.
Basiev TT Vassiliev SV Doroshenko ME Osiko VV Puzikov VM Kosmyna MB 《Optics letters》2006,31(1):65-67
Different regimes of laser operation and stimulated Raman scattering (SRS) for a laser diode (LD)-pumped PbMoO4:Nd3+ crystal have been investigated. Under 1.5 W LD pumping, the output power of the PbMoO4:Nd3+ laser in the free-running mode at 1056 nm reached 0.65 W with a slope efficiency of up to 53%. Using different LiF: F-2 saturable absorbers, we achieved a maximum pulse energy of 11 microJ at a 1.4 ns pulse duration and a maximum output power of 0.35 W (10 microJ) at a 7 ns pulse width in the passively Q-switched mode. PbMoO4:Nd3+ self-Raman-laser operation at 1163 nm (first Stokes) was obtained for the first time, to our knowledge. The self-Raman-laser output pulse energy was measured to be as high as 6 microJ and the pulse duration was estimated to be shorter than 500 ps. 相似文献
29.
S. Yu. Vassiliev A. I. Yusipovich Yu. E. Rogynskaya F. Kh. Chibirova A. M. Skundin T. L. Kulova 《Journal of Solid State Electrochemistry》2005,9(10):698-705
The difference in degradation behavior of titania-doped tin dioxide films is explained by a pronounced effect of the doping level on the film dispersity and fine distribution of titania. A two to three times decrease in nanoparticles sizes in the doped films compared with nanoparticles in SnO2 film (20–30 nm) is revealed by using scanning tunneling microscopy (STM). Such STM data (measured in ex situ configuration) combined with XRD and Mössbauer spectroscopy analysis confirm that the nanoparticles are composed of nanostructured heavily disordered SnO2 and TiO2 rutile solid solution or of amorphous phase containing both SnO2 and TiO2, the content of the crystalline and amorphous phases being approximately equal.
相似文献
S. Yu. VassilievEmail: |
30.
A. N. Kozlov S. A. Zibrov A. A. Zibrov V. I. Yudin A. V. Taichenachev V. P. Yakovlev E. A. Tsygankov A. S. Zibrov V. V. Vassiliev V. L. Velichansky 《Journal of Experimental and Theoretical Physics》2016,122(5):823-831
Magnetic resonance at the Fg = 1 \( \rightleftarrows \)Fe = 1 transition of the D1 line in 87Rb has been studied with pumping and detection by linearly polarized radiation and detection at the double frequency of the radiofrequency field. The intervals of allowed values of the static and alternating magnetic fields in which magnetic resonance has a single maximum have been found. The structure appearing beyond these intervals has been explained. It has been shown that the quadratic Zeeman shift is responsible for the three-peak structure of resonance; the radiofrequency shift results in the appearance of additional extrema in resonance, which can be used to determine the relaxation constant Γ2. The possibility of application in magnetometry has been discussed. 相似文献