全文获取类型
收费全文 | 340篇 |
免费 | 1篇 |
国内免费 | 2篇 |
专业分类
化学 | 159篇 |
晶体学 | 2篇 |
力学 | 13篇 |
数学 | 87篇 |
物理学 | 82篇 |
出版年
2022年 | 4篇 |
2018年 | 3篇 |
2017年 | 5篇 |
2016年 | 4篇 |
2014年 | 4篇 |
2013年 | 7篇 |
2012年 | 6篇 |
2011年 | 6篇 |
2010年 | 7篇 |
2009年 | 8篇 |
2008年 | 8篇 |
2007年 | 7篇 |
2006年 | 13篇 |
2005年 | 10篇 |
2004年 | 14篇 |
2003年 | 11篇 |
2002年 | 12篇 |
2001年 | 14篇 |
2000年 | 7篇 |
1998年 | 8篇 |
1997年 | 5篇 |
1996年 | 11篇 |
1995年 | 9篇 |
1994年 | 4篇 |
1993年 | 7篇 |
1992年 | 10篇 |
1991年 | 3篇 |
1990年 | 17篇 |
1989年 | 9篇 |
1988年 | 6篇 |
1987年 | 4篇 |
1986年 | 9篇 |
1985年 | 6篇 |
1984年 | 5篇 |
1983年 | 4篇 |
1982年 | 7篇 |
1981年 | 3篇 |
1980年 | 4篇 |
1977年 | 5篇 |
1976年 | 5篇 |
1975年 | 6篇 |
1973年 | 5篇 |
1972年 | 10篇 |
1971年 | 2篇 |
1970年 | 4篇 |
1969年 | 4篇 |
1968年 | 4篇 |
1967年 | 4篇 |
1966年 | 2篇 |
1965年 | 5篇 |
排序方式: 共有343条查询结果,搜索用时 0 毫秒
101.
Aleshunin P. A. Aleshunina D. V. Ostrovskii V. A. 《Russian Journal of Organic Chemistry》2011,47(11):1786-1788
Russian Journal of Organic Chemistry - 相似文献
102.
103.
Obninsk Institute of Atomic Energy. Translated from Matematicheskie Zametki, Vol. 56, No. 5, pp. 98–107, November, 1994. 相似文献
104.
105.
Nedel'ko V. V. Korsunskii B. L. Chukanov N. V. Larikova T. S. Korchevskaya E. V. Malin A. A. Shcherbinin M. B. Ostrovskii V. A. 《Russian Journal of Organic Chemistry》2003,39(5):727-730
The kinetics of thermal decomposition of 3'-azidothymidine (AZT) in melt at 140-201°C were studied by the thermogravimetric and manometric methods. The process follows the first-order kinetics and is decribed by the Arrhenius equation: k = 1014.7±0.5 exp[-(38100±900)/RT] (1/s). The kinetic and activation parameters are typical of thermal decomposition of aliphatic azides; they suggest that decomposition of the azido group is the rate-determining stage. The formation of nitrogen (1 mol per mole of AZT), furan, methyl alcohol, water, and carbon dioxide was confirmed by mass spectrometry. Thymine was found to be one of the condensed products of thermal decomposition of 3'-azidothymidine. 相似文献
106.
S. É. Ivanova G. I. Koldobskii V. A. Ostrovskii 《Chemistry of Heterocyclic Compounds》1993,29(7):770-774
The review discusses the results obtained in the synthesis of substituted 1,2,4-triazoles and 3H-1,3,4-benzotriazepines from 5-aryltetrazoles and N-arylbenzimidoyl chlorides. The farther possibilities of obtaining 3H-1,3,4-benzotriazepines, the mechanism of their formation, and the physical and chemical properties have been assessed.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 907–912, July, 1993. 相似文献
107.
Extremal Problems for Operators in Banach Spaces Arising in the Study of Linear Operator Pencils, II
M. I. Ostrovskii 《Integral Equations and Operator Theory》2005,51(4):553-564
This paper is devoted to the study of operators satisfying the condition
where stands for the spectral radius; and Banach spaces in which all operators satisfy this condition. Such spaces are called V–spaces. The present paper contains partial solutions of some of the open problems posed in the first part of the paper. The main results: (1) Each subspace of lp (1 < p < ) is a V–space. (2) For each infinite dimensional Banach space X there exists an equivalent norm |||·||| on X such that the space (X, |||·|||) is not a V–space. (3) Let X be a separable infinite dimensional Banach space with a symmetric basis. If X has the V-property, then X is isometric to lp, 1 < p < . 相似文献
108.
109.
110.
A. B. Zhivich G. I. Koldobskii V. A. Ostrovskii 《Chemistry of Heterocyclic Compounds》1990,26(12):1319-1328
A summary is given for the methods of preparing tetrazolium salts, the physicochemical properties of these compounds, and their application in research and industry.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1587–1599, December, 1990. 相似文献