全文获取类型
收费全文 | 303篇 |
免费 | 0篇 |
专业分类
化学 | 214篇 |
晶体学 | 2篇 |
力学 | 1篇 |
数学 | 31篇 |
物理学 | 55篇 |
出版年
2022年 | 3篇 |
2021年 | 2篇 |
2020年 | 5篇 |
2019年 | 6篇 |
2018年 | 7篇 |
2017年 | 5篇 |
2016年 | 10篇 |
2015年 | 3篇 |
2014年 | 5篇 |
2013年 | 18篇 |
2012年 | 9篇 |
2011年 | 13篇 |
2010年 | 17篇 |
2009年 | 11篇 |
2008年 | 10篇 |
2007年 | 15篇 |
2006年 | 8篇 |
2005年 | 5篇 |
2004年 | 6篇 |
2003年 | 9篇 |
2002年 | 4篇 |
2001年 | 7篇 |
2000年 | 4篇 |
1999年 | 6篇 |
1998年 | 5篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1994年 | 5篇 |
1993年 | 3篇 |
1992年 | 3篇 |
1991年 | 8篇 |
1990年 | 3篇 |
1987年 | 4篇 |
1986年 | 3篇 |
1984年 | 4篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1977年 | 2篇 |
1975年 | 2篇 |
1974年 | 4篇 |
1972年 | 5篇 |
1967年 | 3篇 |
1966年 | 2篇 |
1961年 | 4篇 |
1960年 | 5篇 |
1959年 | 7篇 |
1958年 | 7篇 |
1956年 | 4篇 |
1955年 | 2篇 |
排序方式: 共有303条查询结果,搜索用时 125 毫秒
1.
2.
Matveeva E. D. Podrugina T. A. Grishin Yu. K. Tkachev V. V. Zhdankin V. V. Aldoshin S. M. Zefirov N. S. 《Russian Journal of Organic Chemistry》2003,39(4):536-541
A mixed phosphonium-iodonium ylide, phenyliodoniumethoxycarbonylmethylenetriphenylphosphorane borofluoride, was synthesized. Its structure was established by means of X-ray diffraction analysis. Temperature dependence of 1H, 13C, and 31P spectra of the ylide synthesized was investigated. A dynamic equilibrium between Z and E-isomers was observed. 相似文献
3.
4.
5.
Zelenin K. N. Verbov V. N. Matveeva Z. M. 《Chemistry of Heterocyclic Compounds》1977,13(12):1324-1327
It follows from the PMR spectra that the reaction of 1-methyl-, 1-phenyl-, 1-ethyl-,1-phenyl-, and 1,1-diphenyldiazenium salts with cis- and trans-d-styrenes, which leads to the corresponding 3-d-4-phenyl-1,2,3,4-tetrahydrocinnolines, takes place with retention of the configuration in the starting styrenes. It is therefore proposed that this reaction be regarded as a special case of [4+s + 2s]-cycloaddition.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1658–1661, December, 1977. 相似文献
6.
7.
8.
Yu. G. Baklagina A. K. Khripunov A. A. Tkachenko V. V. Kopeikin N. A. Matveeva V. K. Lavrent'ev V. K. Nilova T. E. Sukhanova R. Yu. Smyslov I. S. Zanaveskina V. V. Klechkovskaya L. A. Feigin 《Russian Journal of Applied Chemistry》2005,78(7):1176-1181
The structure and sorption properties of gel films of bacterial cellulose were studied in its interaction with polyvinylpyrrolidone and silver nanoparticles stabilized by this compound. 相似文献
9.
E. D. Matveeva T. A. Podrugina M. V. Prisyazhnoi I. N. Rusetskaya N. S. Zefirov 《Russian Chemical Bulletin》2007,56(4):798-805
Interaction of aliphatic and aromatic aldehydes and ketones with optically active L-α-amino acids or their esters in the three-component catalytic one-pot synthesis of α-aminophosphonates was studied. The
corresponding α-amino phosphonates are formed in high yields as mixtures of diastereomers.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 768–774, April, 2007. 相似文献
10.
A. G. Matveeva E. I. Matrosov Z. A. Starikova G. V. Bodrin S. V. Matveev P. V. Petrovskii E. E. Nifant’ev 《Russian Chemical Bulletin》2005,54(11):2519-2534
The trifunctional ligand, 2,6-bis(diphenylphosphorylmethyl)-4-methylphenol (L
2), forms complexes with cerium(III) nitrate having a ligand to metal ratio of 1: 1, 2: 1, and 3: 1. The structures of these complexes in the solid state and
in solution were studied by X-ray diffraction, IR and NMR (1H and 31P) spectroscopy, and conformational analysis (molecular mechanics). The 2: 1 complexes of L
2 with lanthanum(III) and neodymium(III) nitrates were synthesized and characterized. In all complexes, the neutral ligand is coordinated through both phosphoryl
oxygen atoms. The hydroxy oxygen atom is coordinated only in some complexes, and the hydrogen atom of the hydroxy group is
involved in hydrogen bonding. The compositions and structures of the resulting complexes depend on the method of synthesis
and the nature of solvent. The ligand was found to undergo easy inner-sphere oxidation. The structure of one of the transformation
products was established by X-ray diffraction. Unlike the coordinated ligand, the free ligand is very stable to oxidation.
Dedicated to Corresponding Member of the Russian Academy of Sciences T. A. Mastryukova.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2440–2454, November, 2005. 相似文献