全文获取类型
收费全文 | 159篇 |
免费 | 2篇 |
专业分类
化学 | 102篇 |
晶体学 | 1篇 |
力学 | 4篇 |
数学 | 24篇 |
物理学 | 30篇 |
出版年
2022年 | 2篇 |
2021年 | 2篇 |
2020年 | 2篇 |
2016年 | 2篇 |
2015年 | 2篇 |
2014年 | 3篇 |
2013年 | 5篇 |
2012年 | 2篇 |
2011年 | 5篇 |
2010年 | 3篇 |
2008年 | 3篇 |
2007年 | 2篇 |
2006年 | 3篇 |
2005年 | 2篇 |
2004年 | 5篇 |
2003年 | 3篇 |
2002年 | 2篇 |
2001年 | 2篇 |
2000年 | 7篇 |
1998年 | 3篇 |
1997年 | 2篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 4篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1982年 | 7篇 |
1980年 | 3篇 |
1978年 | 2篇 |
1976年 | 4篇 |
1974年 | 2篇 |
1973年 | 2篇 |
1971年 | 4篇 |
1969年 | 4篇 |
1968年 | 2篇 |
1967年 | 2篇 |
1966年 | 4篇 |
1965年 | 2篇 |
1934年 | 2篇 |
1932年 | 2篇 |
1888年 | 3篇 |
1887年 | 4篇 |
1883年 | 6篇 |
1870年 | 2篇 |
1863年 | 2篇 |
1862年 | 2篇 |
排序方式: 共有161条查询结果,搜索用时 15 毫秒
71.
G. Palm 《Probability Theory and Related Fields》1976,36(1):27-45
Ohne Zusammenfassung 相似文献
72.
73.
74.
75.
76.
We demonstrate a simple and rapid single-step method to fabricate an enzyme microreactor incorporating the N-glycosidase PNGase F (peptide-N-glycosidase F) into a porous polymer-based monolith. The monolith is contained in a capillary format, while the enzyme reactor is ready to use within 1 h of preparation. The monomers making up the monolith, including N-acryloxysuccinimide for covalent immobilization of the enzyme, are mixed with PNGase F and introduced into the column by capillary force for polymerization/immobilization. Glycoproteins (ribonuclease B, asialofetuin, alpha1-acid glycoprotein, and ovalbumin) perfused through the PNGase F reactor were shown to be effectively deglycosylated on a time-scale of seconds/low minutes using low nanogram to microgram per microliter concentration (corresponding to a total sample consumption of 0.1-20 microg of a glycoprotein). The reactor enzyme activity was shown to be reproducible for at least 8 weeks when used and stored at room temperature. Evaluation was performed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. 相似文献
77.
E. Palm 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》1967,79(5):251-251
78.
The extrinsic photoconductive decay at T=20–100 K is analyzed in FZ-grown Si: In material after pulsed irradiation by a PbSSe infrared laser (=4 m). Trapping time constants (=10 ns-100 s) are resolved for the prevalent In acceptor (N
In=1016–1017 cm–3) and for additional shallow acceptors B, Al, and the X(In)-center present at low concentrations (N=1012–1014 cm–3). Hole capture cross sections determined for the acceptor levels show a large scatter over up to 4 orders of magnitude. It is shown that the capture cross section is dependent on all the dopant concentrations present in the sample due to nearest neighbor interaction. Due to the formation of donor-acceptor dipoles, the capture cross section assumes low values. A model calculation of the interaction based on only fundamental parameters of Si is in accordance with the experimental data within the experimental error. The hole capture cross sections for isolated acceptors are p=1×10–12, 1×10–14, 1×10–13, 2.5×10–13 cm2 for indium, X-center, aluminum, and boron at the temperatures T=95 K, 100 K, 70 K, 45 K, respectively. 相似文献
79.
R. Palm 《Fresenius' Journal of Analytical Chemistry》1883,22(1):323-324
Ohne Zusammenfassung 相似文献
80.
Hans A. Kestler Ludwig Lausser Wolfgang Lindner G��nther Palm 《Computational Statistics》2011,26(2):321-340
We study ensembles of simple threshold classifiers for the categorization of high-dimensional data of low cardinality and
give a compression bound on their prediction risk. Two approaches are utilized to produce such classifiers. One is based on
univariate feature selection employing the area under the ROC curve as ranking criterion. The other approach uses a greedy
selection strategy. The methods are applied to artificial data, published microarray expression profiles, and highly imbalanced
data. 相似文献