全文获取类型
收费全文 | 206篇 |
免费 | 2篇 |
专业分类
化学 | 107篇 |
晶体学 | 1篇 |
力学 | 21篇 |
数学 | 14篇 |
物理学 | 65篇 |
出版年
2019年 | 6篇 |
2017年 | 2篇 |
2014年 | 4篇 |
2013年 | 5篇 |
2012年 | 6篇 |
2011年 | 5篇 |
2009年 | 4篇 |
2008年 | 9篇 |
2007年 | 6篇 |
2006年 | 8篇 |
2005年 | 5篇 |
2003年 | 2篇 |
2002年 | 2篇 |
2001年 | 3篇 |
2000年 | 4篇 |
1999年 | 3篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1994年 | 8篇 |
1993年 | 6篇 |
1992年 | 7篇 |
1991年 | 5篇 |
1990年 | 4篇 |
1989年 | 6篇 |
1988年 | 4篇 |
1986年 | 3篇 |
1985年 | 3篇 |
1984年 | 5篇 |
1982年 | 4篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1979年 | 4篇 |
1978年 | 6篇 |
1977年 | 8篇 |
1976年 | 7篇 |
1975年 | 2篇 |
1973年 | 3篇 |
1972年 | 2篇 |
1968年 | 2篇 |
1967年 | 3篇 |
1966年 | 3篇 |
1959年 | 1篇 |
1957年 | 2篇 |
1956年 | 1篇 |
1952年 | 1篇 |
1942年 | 2篇 |
1940年 | 1篇 |
1937年 | 4篇 |
1935年 | 1篇 |
1896年 | 3篇 |
排序方式: 共有208条查询结果,搜索用时 218 毫秒
31.
32.
The limits of identification of twenty six common cations, with a selected number of spray reagents used in paper chromatography, have been determined. A table of the most sensitive tests is given. 相似文献
33.
J. M. Pollard 《BIT Numerical Mathematics》1979,19(4):545-548
We describe a novel form of Monte Carlo method with which to study self-avoiding random walks; we do not (in any sense) store the path of the walk being considered. As we show, the problem is related to that of devising a random-number generator which can produce itsnth number on request, without running through its sequence up to this point. 相似文献
34.
35.
Synaptic vesicles: structure of chromaffin granule membranes 总被引:2,自引:0,他引:2
36.
37.
A penalty function, finite volume method is described for two-dimensional laminar and turbulent flows. Turbulence is modelled using the k-? model. The governing equations are discretized and the resulting algebraic equations are solved using both sequential and coupled methods. The performance of these methods is gauged with reference to a tuned SIMPLE-C algorithm. Flows considered are a square cavity with a sliding top, a plane channel flow, a plane jet impingement and a plane channel with a sudden expansion. A sequential method is employed, which uses a variety of dicretization practices, but is found to be extremely slow to converge; a coupled method, evaluated using a variety of matrix solvers, converges rapidly but, relative to the sequential approach, requires larger memory. 相似文献
38.
Z.M. Babar Wan Mohd Azizi Solachuddin JA Ichwan Qamar Uddin Ahmed Abul Kalam Azad Imranul Mawa 《Natural product research》2019,33(15):2266-2270
The current study provides a way of extraction for both active NSO and WSE from Nigella sativa seeds using 98% methanol. About 1?kg of ground seeds was macerated by 1:2.5 w/v (g/mL) for 72?hours. After rotary evaporation and 7 days of continuous drying and chilling at 50 and 4?°C, NSO and WSE were obtained at the same instant. Solubility tests of 24 solvents and 11 thin layer chromatographic analyses while 2, 2-diphenyl-1-picrylhydrazyl free radical scavenging assay of NSO (73.66) , WSE (33.32) and NSO?+?WSE (78.22) against ascorbic acid (IC50?=?4.28?mg/mL) was performed. WSE was found to be highly soluble in water and 5% NaOH exhibiting the same Rf value of 0.95 for EtOH:DMSO (9:1) against the honey. WSE has revealed more than twofold higher anti-oxidant activity than others. Formulation of WSE with Tualang honey may provide better targeted hydrophilic drug delivery systems. 相似文献
39.
Corrigendum: Multifunctional Nanoprobes for Nanoscale Chemical Imaging and Localized Chemical Delivery at Surfaces and Interfaces
下载免费PDF全文
![点击此处可从《Angewandte Chemie (International ed. in English)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Dr. Yasufumi Takahashi Dr. Andrew I. Shevchuk Dr. Pavel Novak Prof. Yanjun Zhang Neil Ebejer Prof. Julie V. Macpherson Prof. Patrick R. Unwin Dr. Andrew J. Pollard Dr. Debdulal Roy Dr. Charles A. Clifford Dr. Hitoshi Shiku Prof. Tomokazu Matsue Prof. David Klenerman Prof. Yuri E. Korchev 《Angewandte Chemie (International ed. in English)》2014,53(28):7109-7109
40.
Antonio Fernandez Emily J. Thompson Jeffrey W. Pollard Takanori Kitamura Marc Vendrell 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(47):17050-17054
We report the novel chemical design of fluorescent activatable chemokines as highly specific functional probes for imaging subpopulations of immune cells in live tumours. Activatable chemokines behave as AND‐gates since they emit only after receptor binding and intracellular activation, showing enhanced selectivity over existing agents. We have applied this strategy to produce mCCL2‐MAF as the first probe for in vivo detection of metastasis‐associated macrophages in a preclinical model of lung metastasis. This strategy will accelerate the preparation of new chemokine‐based probes for imaging immune cell function in tumours. 相似文献