全文获取类型
收费全文 | 166篇 |
免费 | 0篇 |
专业分类
化学 | 106篇 |
晶体学 | 1篇 |
力学 | 6篇 |
数学 | 1篇 |
物理学 | 52篇 |
出版年
2022年 | 4篇 |
2021年 | 4篇 |
2020年 | 2篇 |
2019年 | 1篇 |
2018年 | 4篇 |
2017年 | 3篇 |
2016年 | 4篇 |
2015年 | 1篇 |
2014年 | 4篇 |
2013年 | 4篇 |
2012年 | 5篇 |
2011年 | 3篇 |
2010年 | 9篇 |
2009年 | 6篇 |
2008年 | 3篇 |
2007年 | 10篇 |
2006年 | 7篇 |
2005年 | 3篇 |
2004年 | 5篇 |
2003年 | 7篇 |
2002年 | 10篇 |
2001年 | 9篇 |
2000年 | 4篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 6篇 |
1990年 | 4篇 |
1988年 | 1篇 |
1987年 | 3篇 |
1986年 | 1篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1977年 | 2篇 |
1976年 | 1篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1973年 | 4篇 |
1968年 | 1篇 |
排序方式: 共有166条查询结果,搜索用时 31 毫秒
1.
O. V. Andreeva V. G. Bespalov A. L. Pyait V. N. Sizov A. S. Cherkasov 《Optics and Spectroscopy》2004,96(2):149-156
The results of a complex investigation of the recording of dynamic holograms by pulsed radiation with a duration of 20 ns and 300 ps in fullerene-containing media based on porous glasses and polymethyl methacrylate matrices are reported. Spectral analysis of these media in the range 300–700 nm was performed. The efficiency of hologram recording was found to relate with the occurrence of a band at 330 nm in the absorption spectrum of a medium. It is shown that dynamic holograms can be recorded in the fullerene-containing media by nanosecond and picosecond pulses. In the latter case, holograms arise mainly due to a change in the electronic polarizability of fullerene molecules, which is almost inertialess. The results obtained can be used in the development of ultrafast switching devices based on dynamic holograms. 相似文献
2.
A procedure was developed for the synthesis of polyfluoroalkylthiotrifluoroacetylketenes, and their reactions with nucleophilic reagents were studied. The resulting compounds were demonstrated to act as heterodienes in reactions with unsaturated compounds. 相似文献
3.
4.
A. I. Sizov T. M. Zvukova A. A. Gorkovskii Z. A. Starikova B. M. Bulychev 《Russian Chemical Bulletin》2004,53(10):2175-2178
The [Cp2HfH2Al(H)Br(OBu)]2 complex (1) was prepared by the reaction of Cp2HfBr2 with AlH3 in THF and characterized by X-ray crystallography. The formation of dinuclear complex 1 proceeds through the intermediate formation (as a result of cleavage of THF molecules) of the >Al(μ-OBu)2Al< fragment. The latter is linked to two hafnocene dihydride molecules by the Hf-H-Al hydrogen bridges. The Hf atom in complex 1 has a 16-electron environment.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2082–2085, October, 2004. 相似文献
5.
Computer simulation of the adsorption of Lennard–Jones fluid in slitlike micropores with structured walls was performed by the Monte Carlo and molecular dynamic methods. The influence of pore width, temperature, pressure, and surface structure on the disjoining pressure was considered. Structural and energy characteristics of the surface affect significantly the value of the disjoining pressure. Among the surface structural characteristics, the important role is played by the number and localization of vacancy-type defects. 相似文献
6.
It is shown that 2,2-difluoro-3-hydroxymethylbenzo-1,4-oxathianes are formed together with 3-trifluoromethylbenzo-1,4-oxathianes whenortho-(-trifluoromethyl--chloroethylthio)phenols are boiled with excess aqueous alkali. The mechanism of the reaction is discussed.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1457–1459, August, 1994. 相似文献
7.
Sizov A. I. Zvukova T. M. Belsky V. K. Bulychev B. M. 《Russian Chemical Bulletin》2001,50(11):2200-2202
The heterometallic zirconocene(iii) aluminum hydride complex (Cp2ZrH)2HAlCl2·C4H8O2·C6H6 was synthesized by reduction of Cp2ZrCl2 with lithium aluminum hydride in the presence of Cp2TiBH4 and 1,4-dioxane, and its structure was established by X-ray diffraction analysis. 相似文献
8.
B. M. Bulychev V. N. Verbetskii A. I. Sizov T. M. Zvukova V. K. Genchel’ V. N. Fokin 《Russian Chemical Bulletin》2007,56(7):1305-1312
Crystallization of non-solvated aluminum hydride from a diethyl ether-benzene mixed solvent was studied. The desolvation of
AlH3·(Et2O)x etherate in solution and the crystallization of α-AlH3 during polythermal heating of the solution occur only in the presence of ≥10 wt.% LiAlH4. The process is multistage, and the crystallization begins with the formation of the AlH3·0.25Et2O solvate, which recrystallizes in the solid phase into γ-AlH3 and then α-AlH3. Four crystalline modifications of aluminum hydride were characterized by X-ray diffraction and electron microscopy.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1259–1265, July, 2007. 相似文献
9.
Sizova O. V. Sizov V. V. Ershov A. Yu. Nikol'skii A. B. Baranovskii V. I. Shashko A. D. 《Russian Journal of General Chemistry》2001,71(7):995-1000
The results of ab initio quantum-chemical calculations of isolated ruthenium(II) complexes cis- [Ru(bpy)2(bipy)(X)]44q (bpy is 2,2'-bipyridyl, bipy is 4,4'-bipyridyl; X = NH3, Cl-, Br-, CN-, NO-
2, ONO-, MeCN, and NO+) are presented. Analysis of the charge distributions and the orbital structures of the complex ions points to absence of strong -acceptor bonds Ru-bpy, Ru-bipy, and Ru-X (X = NO+), to delocalization of -electron density under the action of strong donors X, to localized nature of lowest unoccupied molecular orbitals, and to special position of the nitrosyl complexes in this series. 相似文献
10.