全文获取类型
收费全文 | 1270篇 |
免费 | 5篇 |
国内免费 | 1篇 |
专业分类
化学 | 843篇 |
晶体学 | 41篇 |
力学 | 19篇 |
数学 | 70篇 |
物理学 | 303篇 |
出版年
2022年 | 13篇 |
2021年 | 20篇 |
2020年 | 21篇 |
2019年 | 29篇 |
2018年 | 47篇 |
2017年 | 38篇 |
2016年 | 51篇 |
2015年 | 10篇 |
2014年 | 27篇 |
2013年 | 42篇 |
2012年 | 36篇 |
2011年 | 59篇 |
2010年 | 50篇 |
2009年 | 47篇 |
2008年 | 50篇 |
2007年 | 52篇 |
2006年 | 54篇 |
2005年 | 29篇 |
2004年 | 34篇 |
2003年 | 37篇 |
2002年 | 18篇 |
2001年 | 20篇 |
2000年 | 21篇 |
1999年 | 15篇 |
1998年 | 14篇 |
1997年 | 16篇 |
1996年 | 13篇 |
1995年 | 17篇 |
1994年 | 9篇 |
1992年 | 10篇 |
1991年 | 17篇 |
1990年 | 19篇 |
1987年 | 9篇 |
1986年 | 12篇 |
1985年 | 11篇 |
1984年 | 10篇 |
1983年 | 9篇 |
1982年 | 9篇 |
1980年 | 21篇 |
1979年 | 15篇 |
1978年 | 17篇 |
1977年 | 24篇 |
1976年 | 30篇 |
1975年 | 12篇 |
1974年 | 27篇 |
1973年 | 10篇 |
1972年 | 15篇 |
1971年 | 20篇 |
1969年 | 10篇 |
1967年 | 10篇 |
排序方式: 共有1276条查询结果,搜索用时 15 毫秒
71.
Rassolov A. V. Ivanov G. A. Bragina G. O. Baeva G. N. Smirnova N. S. Kazakov A. V. Usachev N. Ya. Stakheev A. Yu. 《Kinetics and Catalysis》2021,62(5):641-650
Kinetics and Catalysis - The catalytic performance of a bimetallic RhIn/SiO2 catalyst was studied in the liquid-phase hydrogenation of nitrobenzene. The formation of intermetallic Rh1In1... 相似文献
72.
M. V. Pavlovskaya N. N. Smirnova A. V. Markin D. F. Grishin 《Russian Journal of Applied Chemistry》2014,87(3):324-330
Specific features of radical polymerization of vinyl chloride in the presence of nitroxyl radicals of the imidazoline series (2-methyl-2,3-diphenyl-1,4-diazaspiro[4,5]dec-3-ene-1-oxyl, 2,2,5,5-tetramethyl-4-phenyl-2,5-dihydroimidazole-1-oxyl, 2,2,5-trimethyl-4,5-diphenyl-2,5-dihydroimidazole-1-oxyl) were studied. The possibility of preparing vinyl chloride-styrene block copolymers in the presence of these nitroxyl radicals was demonstrated, suggesting the occurrence of the polymerization by the reversible inhibition mechanism. The molecular-mass characteristics and the glass transition points of the synthesized samples were determined. 相似文献
73.
C. Magron Ph. Alfaurt B. Blank L. Daudin T. Eronen M. Gerbaux J. Giovinazzo D. Gorelov S. Grévy H. Guérin J. Hakala V. S. Kolhinen J. Koponen T. Kurtukian Nieto I. D. Moore H. Penttilä I. Pohjalainen J. Reinikainen M. Reponen S. Rinta-Antila M. Roche A. de Roubin N. Smirnova B. Thomas A. Voss L. Xayavong 《The European Physical Journal A - Hadrons and Nuclei》2017,53(4):77
74.
I. E. Smirnova H. Do Thi Thu O. B. Kazakova G. A. Tolstikov O. S. Kukovinets A. N. Lobov K. Yu. Suponitskii 《Russian Journal of Organic Chemistry》2012,48(10):1370-1376
Oxidation of dipterocarpol and its derivatives with ozone gave compounds containing lactone, lactol, alkoxytetrahydrofuran, aldehyde, and methyl ketone fragments in the side chain, as well as 1,2,4-trioxolane fragment in the A ring. The molecular and crystalline structures of dipterocarpol were determined by X-ray analysis. 相似文献
75.
N. V. Smirnova N. S. Gulyukina E. A. Astaf'ev O. A. Petrii G. A. Tsirlina I. P. Beletskaya 《Russian Journal of Electrochemistry》2002,38(6):626-632
A general characteristic of cathodic reduction of -phenylvinylphosphonic acid and its methyl- and chloro-parasubstituted derivatives on Pt/Pt, Pd/Pt, and Pd/Pt modified with Cd and Cu adatoms, is given. At effective pressures of about 103–104 Pa the processes occur at high rates and at some potentials are limited by the reactant diffusion from the bulk solution. In the presence of Cd and Cu adatoms two reduction waves (presumably, single-electron) may be isolated, i.e. the hampering by adatoms is more pronounced for a second successive stage of the process. At low effective hydrogen pressures the hydrogenation rate is higher on Pd electrodes, which possess a larger sorption capacity. Potential intervals where the reduction of substituted reactants may be complicated by destruction, are found. It is shown that -phenylvinylphosphonic acid undergoes a complete reduction with a current efficiency of 100% in both hydrochloric- and sulfuric-acid solutions. Conditions where the reduction of -(4-chlorophenyl)vinylphosphonic acid proceeds largely without destruction are found. Prospects for use of electrochemical reduction as a preparative method of a selective production of -arylethylphosphonic acids are considered. 相似文献
76.
77.
78.
79.
80.