全文获取类型
收费全文 | 228篇 |
免费 | 5篇 |
专业分类
化学 | 135篇 |
晶体学 | 21篇 |
力学 | 6篇 |
数学 | 31篇 |
物理学 | 40篇 |
出版年
2023年 | 2篇 |
2022年 | 3篇 |
2021年 | 11篇 |
2020年 | 9篇 |
2019年 | 9篇 |
2018年 | 6篇 |
2017年 | 9篇 |
2016年 | 7篇 |
2015年 | 5篇 |
2014年 | 4篇 |
2013年 | 10篇 |
2012年 | 11篇 |
2011年 | 10篇 |
2010年 | 6篇 |
2009年 | 7篇 |
2008年 | 6篇 |
2007年 | 10篇 |
2006年 | 9篇 |
2005年 | 5篇 |
2004年 | 7篇 |
2003年 | 8篇 |
2002年 | 3篇 |
2001年 | 5篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 3篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 3篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1979年 | 4篇 |
1978年 | 5篇 |
1977年 | 6篇 |
1976年 | 2篇 |
1975年 | 3篇 |
1974年 | 4篇 |
1973年 | 2篇 |
1971年 | 2篇 |
1970年 | 2篇 |
1969年 | 1篇 |
1968年 | 2篇 |
排序方式: 共有233条查询结果,搜索用时 15 毫秒
1.
L. I. Bryukvina E. A. Ermolaeva S. N. Pidgurskiĭ L. F. Suvorova V. M. Khulugurov 《Physics of the Solid State》2006,48(1):68-72
It was detected for the first time that films consisting of a transition-metal-based structure form (via thermal diffusion
of intracrystalline impurities) on the surface of alkali-halide (LiF, NaF) crystals activated by transition metals Co, Ni,
or Mn. The thickness, density, and composition of the films are shown to be different, depending on the heat treatment conditions.
The crystals were annealed at temperatures varying from 473 to 1073 K in vacuum and air. The surface structures forming upon
annealing in vacuum exhibit magnetic properties. The films were studied by optical, x-ray fluorescence, and electron spectroscopy
to reveal the mechanisms of transition-metal film formation during thermal annealing. 相似文献
2.
A. N. Titov O. N. Suvorova S. Yu. Ketkov S. G. Titova A. I. Merentsov 《Physics of the Solid State》2006,48(8):1466-1471
Single crystals and polycrystals of titanium diselenide TiSe2 intercalated with ferrocene Fe(η5-C5H5)2 and cobaltocene Co(η5-C5H5)2 are synthesized. The magnetic susceptibility and electrical resistivity of the intercalation compounds are measured. The results obtained demonstrate that the intercalation brings about the formation of an impurity band with a temperature-dependent width. 相似文献
3.
Suvorova V. V. Panicheva L. P. Mamontova Yu. V. Belyatskii M. K. 《Russian Journal of Organic Chemistry》2003,39(7):957-962
Selective dehydrobromination of 1,2-dibromo-1-phenylethane to -bromostyrene was effected under conditions of phase-transfer catalysis in systems containing KOH, toluene, and tetraalkylammonium bromides. The high selectivity of the catalytic systems originates from stabilization by lipophilic cation of the phase-transfer catalyst of a E1cb-like transition state in the E2 mechanism. In the presence of a catalytic amount of lipophilic alcohols, phenylacetylene was obtained. Substrate activation by alcohol molecules is explained by enhancement of the acceptor power of halogen atoms due to solvation and by increased mobility of hydrogen atoms. 相似文献
4.
5.
6.
B. A. Tertov Yu. G. Bogachev Yu. V. Koshchienko G. M. Suvorova E. B. Tsupak N. K. Chub S. F. Breus 《Chemistry of Heterocyclic Compounds》1986,22(8):868-872
Organolithium and organosodium compounds of 1,2-dimethyl-, 1-methyl-2-ethyl-, 1-methyl-2-propyl-, and 1-phenyl-2-methylbenzimidazole, containing the metal in the alkyl group at position C(2), were obtained by metallation. It was found that metallation can be complicated by the addition of the metalling reagent at the C=N bond of the heterocycle. It was shown that the obtained organometallic compounds can be used for the synthesis of various derivatives of benzimidazole.The calculation was performed with the standard bond lengths. A planar model was used for the carbanion.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1073–1077, August, 1986. 相似文献
7.
8.
9.
A. D. Avrorin A. V. Avrorin V. M. Aynutdinov R. Bannash I. A. Belolaptikov D. Yu. Bogorodsky V. B. Brudanin N. M. Budnev A. R. Gafarov O. N. Gaponenko K. V. Golubkov T. I. Gress I. A. Danilchenko Zh. -A. M. Dzhilkibaev G. V. Domogatsky A. A. Doroshenko A. N. Dyachok V. A. Zhukov A. V. Zagorodnikov V. L. Zurbanov K. G. Kebkal O. G. Kebkal A. V. Kozhin K. V. Konischev A. V. Korobchenko F. K. Koshel A. P. Koshechkin V. F. Kulepov D. A. Kuleshov V. I. Ljashuk M. B. Milenin R. A. Mirgazov E. R. Osipova A. I. Panfilov L. V. Pan’kov E. N. Pliskovsky M. I. Rozanov E. V. Rjabov A. V. Skurihin A. A. Smagina O. V. Suvorova V. A. Tabolenko B. A. Tarashansky S. V. Fialkovsky Z. Honz B. A. Shaybonov A. A. Sheifler M. D. Shelepov S. A. Yakovlev 《Physics of Particles and Nuclei Letters》2016,13(6):737-746
In April 2015, the first cluster of Baikal-GVD was deployed in Lake Baikal and put into operation. It comprises eight strings. Each string consists of 24 optical modules. An optical module is a detection element of Baikal-GVD; it includes a Hamamatsu R7081-100 photomultiplier tube with a high quantum sensitivity. We describe the design of the optical module, the front-end electronics, and the laboratory characterization and calibration. 相似文献
10.