全文获取类型
收费全文 | 115篇 |
免费 | 2篇 |
专业分类
化学 | 60篇 |
晶体学 | 2篇 |
数学 | 4篇 |
物理学 | 51篇 |
出版年
2021年 | 1篇 |
2020年 | 6篇 |
2019年 | 3篇 |
2018年 | 1篇 |
2017年 | 1篇 |
2016年 | 2篇 |
2015年 | 3篇 |
2014年 | 3篇 |
2013年 | 11篇 |
2012年 | 6篇 |
2011年 | 8篇 |
2010年 | 4篇 |
2009年 | 1篇 |
2008年 | 10篇 |
2007年 | 5篇 |
2006年 | 4篇 |
2005年 | 1篇 |
2004年 | 7篇 |
2003年 | 4篇 |
2002年 | 5篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1993年 | 3篇 |
1992年 | 1篇 |
1991年 | 5篇 |
1990年 | 1篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1977年 | 1篇 |
1976年 | 2篇 |
排序方式: 共有117条查询结果,搜索用时 15 毫秒
51.
52.
Cyanopeptolin CB071 (1), a trypsin inhibitor, was isolated from the freshwater cyanobacterium Aphanocapsa sp. Its complete structure was determined by detailed NMR spectroscopy and MS analyses, along with chemical reactions. The compound showed inhibition of trypsin at a concentration of IC50=2.5 microM. 相似文献
53.
54.
We report spatially resolved Raman scattering from Si-doped epitaxial laterally overgrown GaN structures to investigate spatial variations in stress and free electron concentration. The doping-induced increase in the free electron concentration is relatively higher in the laterally overgrown regions than in the coherently grown regions due to the increased contribution of the high-energy A1 longitudinal optical phonon–plasmon coupled mode. In addition, the E2(high) [E2(low)] phonon energy shifts downward (upward) more significantly in the laterally overgrown regions than in the coherently grown regions. The doping-induced Raman shifts of the E2(high) and E2(low) phonons in the laterally overgrown regions are approximately ?0.6 and 0.11 cm?1, respectively, corresponding to the in-plane stress of ~0.22 GPa. 相似文献
55.
Jie Yang Ji‐Inn Song Qiao Song Julia Y. Rho Edward D. H. Mansfield Stephen C. L. Hall Megan Sambrook Feihe Huang Sbastien Perrier 《Angewandte Chemie (International ed. in English)》2020,59(23):8860-8863
Typically, the morphologies of the self‐assembled nanostructures from block copolymers are limited to spherical micelles, wormlike micelles and vesicles. Now, a new generation of materials with unique shape and structures, cylindrical soft matter particles (tubisomes), are obtained from the hierarchical self‐assembly of cyclic peptide‐bridged amphiphilic diblock copolymers. The capacity of obtained photo‐responsive tubisomes as potential drug carriers is evaluated. The supramolecular tubisomes pave an alternative way for fabricating polymeric tubular structures, and will expand the toolbox for the rational design of functional hierarchical nanostructures. 相似文献
56.
Dr. Amit Kumar Dr. Nitee Kumari Dr. Sateesh Dubbu Dr. Sumit Kumar Taewan Kwon Dr. Jung Hun Koo Jongwon Lim Inki Kim Prof. Yoon-Kyoung Cho Prof. Junsuk Rho Prof. In Su Lee 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(24):9547-9556
Interest and challenges remain in designing and synthesizing catalysts with nature-like complexity at few-nm scale to harness unprecedented functionalities by using sustainable solar light. We introduce “nanocatalosomes”—a bio-inspired bilayer-vesicular design of nanoreactor with metallic bilayer shell-in-shell structure, having numerous controllable confined cavities within few-nm interlayer space, customizable with different noble metals. The intershell-confined plasmonically coupled hot-nanospaces within the few-nm cavities play a pivotal role in harnessing catalytic effects for various organic transformations, as demonstrated by “acceptorless dehydrogenation”, “Suzuki–Miyaura cross-coupling” and “alkynyl annulation” affording clean conversions and turnover frequencies (TOFs) at least one order of magnitude higher than state-of-the-art Au-nanorod-based plasmonic catalysts. This work paves the way towards next-generation nanoreactors for chemical transformations with solar energy. 相似文献
57.
Deoxygenation of the cyclic thionocarbonates of 2,3-dihydroxy esters was mediated with magnesium in methanol, which provided a facile method for the synthesis of α-hydroxy esters 相似文献
58.
Lim Jung Woon Hann Swook Kim Jong-Sup Kim Yoon Seon Lee Tae Ho Jeong Myung Yong Kim Boo-Gyoun Rho Byung Sup 《Optical and Quantum Electronics》2012,44(3-5):235-240
Optical and Quantum Electronics - We proposed and demonstrated a polymer-based wavelength division multiplex filter based on multimode interference for 1.31/1.55-μm bidirectional operations. A... 相似文献
59.
60.