全文获取类型
收费全文 | 165篇 |
免费 | 0篇 |
专业分类
化学 | 96篇 |
力学 | 4篇 |
数学 | 4篇 |
物理学 | 61篇 |
出版年
2022年 | 2篇 |
2021年 | 1篇 |
2020年 | 3篇 |
2019年 | 2篇 |
2018年 | 9篇 |
2017年 | 6篇 |
2016年 | 8篇 |
2015年 | 2篇 |
2014年 | 3篇 |
2013年 | 7篇 |
2012年 | 6篇 |
2011年 | 9篇 |
2010年 | 6篇 |
2009年 | 2篇 |
2008年 | 10篇 |
2007年 | 2篇 |
2006年 | 5篇 |
2005年 | 9篇 |
2004年 | 7篇 |
2003年 | 8篇 |
2002年 | 2篇 |
2001年 | 1篇 |
2000年 | 3篇 |
1999年 | 5篇 |
1998年 | 8篇 |
1997年 | 4篇 |
1996年 | 4篇 |
1994年 | 1篇 |
1993年 | 4篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1990年 | 3篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1986年 | 2篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1979年 | 4篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有165条查询结果,搜索用时 15 毫秒
11.
12.
Mikhail P. Koroteev Vitalii K. Belskii Anna R. Bekker Eduard E. Nifantyev 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4)
Abstract Previously we synthesized and examined in detail 1,2- alkylideneglucofuanose 3,5,6-bicyclophosphites; mono- and bicyclophosphates with peculiar chemical and physiological activity were obtained on their base [1]. During the study of their structural dependence, we modified the hydrocarbonic moiety, synthesiz-ed 1,2,3- and 3,5,6-bicyclophosphites and cyclophosphates of gulofuanose, and correlated their features with those of glucose analogues. Furthermore, an additional phosphonate moiety (obtained by a stereoselective reaction of an appropriate ketonic sugar with silylphosphites) was introduced into the glucofuranose 3,5,6-bicyclophosphite molecule to the third carbon atom. As a result, the monosaccharide matrix gained two functional groups containing tri- and fourcoordinated phosphorus. 相似文献
13.
14.
15.
Akimov DA Fedotov AB Koroteev NI Naumov AN Sidorov-Biryukov DA Zheltikov AM Miles RB 《Optics letters》1999,24(7):478-480
An experimental technique based on coherent one-dimensional hyper-Raman-resonant four-wave mixing in broad cylindrically focused light beams has been developed for line-by-line imaging of spatial distribution of excited atoms in a low-temperature plasma of optical breakdown. The technique was applied to map excited lead atoms in a low-temperature laser-produced plasma. 相似文献
16.
Tsao L. Dou Kh. Sun' G. Lyu Yu. Koroteev A. M. Krasnov G. B. 《Russian Journal of Organic Chemistry》2003,39(3):384-391
The reactivity of melezitose hydroxy groups was studied by tritylation in pyridine with subsequent acetylation. After partial detritylation of the products, acetyl group transfer from position 4 to 6 was observed. The structure of the prepared melezitose derivatives was established on the basis of their IR, 1H, 13C, and 1H-1H COSY NMR, and mass spectra (fast atom bombardment), as well as from the results of model calculations performed with the aid of SGI Indigo Molecule-Pattern-Work-Station software package (Biosym) where the potential energy function was approximated with the CVFF potential. The reactivity of primary hydroxy groups in melezitose was found to decrease in the following order: 6' > 6 6' > 1'. 相似文献
17.
18.
19.
N. S. Magomedova A. N. Sobolev M. P. Koroteev N. M. Pugashova V. K. Bel'skii É. E. Nifant'ev 《Journal of Structural Chemistry》1991,32(3):368-373
L. Ya. Karpov Scientific-Research Physical Chemistry Institute. Translated from Zhurnal Strukturnoi Khimii, Vol. 32, No. 3, pp. 67–73, May–June, 1991. 相似文献
20.
E. V. Orlova A. E. Goldberg M. A. Kiskin P. S. Koroteev A. L. Emelina M. A. Bykov G. G. Aleksandrov Zh. V. Dobrokhotova V. M. Novotortsev I. L. Eremenko 《Russian Chemical Bulletin》2011,60(11):2236-2250
Binuclear heterometallic complexes (??2-bpy)CoLn(Piv)5(H2O), (??2-bpy)NiLn(Piv)5(H2O), and (??2-bpy)CuLn(Piv)5(HPiv) (Ln = Sm or Gd, Piv- is the pivalate anion) were synthesized. A comparative study of the structural characteristics and the thermolysis of the resulting compounds was performed. 相似文献