全文获取类型
收费全文 | 704篇 |
免费 | 59篇 |
国内免费 | 1篇 |
专业分类
化学 | 642篇 |
晶体学 | 4篇 |
力学 | 4篇 |
数学 | 50篇 |
物理学 | 64篇 |
出版年
2023年 | 12篇 |
2022年 | 12篇 |
2021年 | 14篇 |
2020年 | 24篇 |
2019年 | 22篇 |
2018年 | 8篇 |
2017年 | 12篇 |
2016年 | 26篇 |
2015年 | 34篇 |
2014年 | 36篇 |
2013年 | 38篇 |
2012年 | 51篇 |
2011年 | 72篇 |
2010年 | 46篇 |
2009年 | 34篇 |
2008年 | 62篇 |
2007年 | 56篇 |
2006年 | 36篇 |
2005年 | 23篇 |
2004年 | 34篇 |
2003年 | 22篇 |
2002年 | 31篇 |
2001年 | 8篇 |
2000年 | 11篇 |
1999年 | 4篇 |
1998年 | 7篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1995年 | 3篇 |
1993年 | 2篇 |
1988年 | 1篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 3篇 |
1980年 | 1篇 |
1979年 | 3篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1974年 | 2篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1925年 | 1篇 |
排序方式: 共有764条查询结果,搜索用时 15 毫秒
181.
Potter CV Dean JL Kybett AP Kidd R James M Canning M 《Organic & biomolecular chemistry》2004,2(24):3535-3540
In January 2003, the Royal Society of Chemistry launched Organic & Biomolecular Chemistry (OBC)--a journal promising to provide high quality research from all aspects of synthetic, physical and biomolecular organic chemistry. The journal was set to build upon the foundations laid down by its predecessor publications (J. Chem. Soc., Perkin Trans. 1 and J. Chem. Soc., Perkin Trans. 2) as well as complement the subject coverage already published in prestigious general chemistry journals such as Chemical Communications and Chemical Society Reviews. Nearly two years on, just how is the programme developing and what can the community expect to see from the Royal Society of Chemistry (RSC)? 相似文献
182.
Stephen Caddick Duncan B JuddAlexandra K.de K Lewis Melanie T ReichMeredith R.V Williams 《Tetrahedron》2003,59(29):5417-5423
The scope of nickel boride mediated reduction of nitriles has been extended further to allow the preparation of Boc protected amines via a mild catalytic process. It is noteworthy that the toxicity of this procedure is greatly reduced due to its catalytic nature in nickel(II) chloride used in combination with excess sodium borohydride. The protocol is marked by its resilience towards air and moisture and hence an easy and general practical protocol. 相似文献
183.
Christophe Deraedt Amalia Rapakousiou Yanlan Wang Lionel Salmon Melanie Bousquet Didier Astruc 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2014,126(32):8585-8589
Simple “click” polycondensation metallopolymers of redox‐robust bis(ethynyl)biferrocene (biFc) and di(azido) poly(ethylene glycol) (PEG400 and PEG1000) were designed for multiple functions including improvement of water solubility and biocompatibility, the introduction of mixed valency and sensing capabilities, and as nanoparticle stabilizers for catalysis. 相似文献
184.
Cydney K. Seigerman Tiffiny M. Micyus Sharon R. Neufeldt Melanie S. Sanford 《Tetrahedron》2013,69(27-28):5580-5587
This paper describes the development of a mild Pd-catalyzed C–H arylation reaction using potassium aryltrifluoroborates in conjunction with Mn(OAc)3 as the oxidant. The scope of this transformation is explored with a variety of different aryltrifluoroborates and arylpyridine substrates. Preliminary mechanistic studies suggest that the reaction proceeds via a high-valent Pd mechanism with C–H activation occurring at or before the rate determining step. 相似文献
185.
186.
187.
188.
189.
190.