全文获取类型
收费全文 | 795篇 |
免费 | 13篇 |
国内免费 | 2篇 |
专业分类
化学 | 673篇 |
晶体学 | 2篇 |
力学 | 6篇 |
数学 | 80篇 |
物理学 | 49篇 |
出版年
2022年 | 4篇 |
2021年 | 8篇 |
2020年 | 8篇 |
2019年 | 13篇 |
2017年 | 4篇 |
2016年 | 21篇 |
2015年 | 20篇 |
2014年 | 17篇 |
2013年 | 43篇 |
2012年 | 39篇 |
2011年 | 46篇 |
2010年 | 33篇 |
2009年 | 34篇 |
2008年 | 39篇 |
2007年 | 42篇 |
2006年 | 28篇 |
2005年 | 37篇 |
2004年 | 35篇 |
2003年 | 34篇 |
2002年 | 20篇 |
2001年 | 10篇 |
2000年 | 11篇 |
1999年 | 10篇 |
1998年 | 10篇 |
1997年 | 10篇 |
1996年 | 6篇 |
1995年 | 7篇 |
1994年 | 7篇 |
1993年 | 8篇 |
1992年 | 9篇 |
1991年 | 6篇 |
1990年 | 16篇 |
1989年 | 5篇 |
1988年 | 9篇 |
1987年 | 11篇 |
1986年 | 14篇 |
1985年 | 14篇 |
1984年 | 13篇 |
1983年 | 9篇 |
1982年 | 17篇 |
1981年 | 7篇 |
1980年 | 12篇 |
1979年 | 10篇 |
1978年 | 5篇 |
1977年 | 9篇 |
1976年 | 7篇 |
1973年 | 6篇 |
1972年 | 4篇 |
1971年 | 4篇 |
1968年 | 5篇 |
排序方式: 共有810条查询结果,搜索用时 140 毫秒
801.
Emelyne Voss Axelle Arrault Jacques Bodiguel Brigitte Jamart-Grgoire 《Tetrahedron: Asymmetry》2009,20(15):1809-1812
The synthesis of enantiomerically pure orthogonally protected δ-azaproline has been performed in five steps including two successive Mitsunobu reactions starting from benzyloxycarbonylaminophthalimide and the (R)-α-hydroxy-γ-butyrolactone. 相似文献
802.
Brigitte E. Breckner Alexandru Horváth Csaba Varga 《Nonlinear Analysis: Theory, Methods & Applications》2009
We prove the existence of multiple solutions of certain systems of hemivariational inequalities, using a recent minimax result of B. Ricceri. We apply both our main theorem and the principle of symmetric criticality to obtain multiple solutions of systems of hemivariational inequalities defined on certain Sobolev spaces. 相似文献
803.
Brigitte Bauer Dr. Max Davidson Dr. Owe Orwar Prof. 《Angewandte Chemie (International ed. in English)》2009,48(9):1656-1659
A simple and scalable method is presented for harvesting, purification, and on‐chip processing of mammalian plasma membrane vesicles (PMVs) optimized for downstream proteome analysis. After immobilization on a microfluidic flowcell of PMVs, the embedded membrane proteins are proteolytically digested, and the peptides harvested and analyzed by LC‐MS/MS. Over 93 % of the detected proteins are plasma‐membrane‐derived.
804.
Brigitte Städler Dr. Rona Chandrawati Andrew D. Price Dr. Siow‐Feng Chong Kerry Breheney Almar Postma Dr. Luke A. Connal Dr. Alexander N. Zelikin Dr. Frank Caruso Prof. 《Angewandte Chemie (International ed. in English)》2009,48(24):4359-4362
Fully loaded : Noncovalent anchoring of liposomes into polymer multilayered films with cholesterol‐modified polymers allows the preparation of capsosomes—liposome‐compartmentalized polymer capsules (see picture). A quantitative enzymatic reaction confirmed the presence of active cargo within the capsosomes and was used to determine the number of subcompartments within this novel biomedical carrier system.
805.
Complex B-splines as introduced in Forster et al. (Appl. Comput. Harmon. Anal. 20:281–282, 2006) are an extension of Schoenberg’s cardinal splines to include complex orders. We exhibit relationships between these complex
B-splines and the complex analogues of the classical difference and divided difference operators and prove a generalization
of the Hermite–Genocchi formula. This generalized Hermite–Genocchi formula then gives rise to a more general class of complex
B-splines that allows for some interesting stochastic interpretations.
相似文献
806.
Axel R. Brenner Brigitte I. Voit Dennis J. Massa S. Richard Turner 《Macromolecular Symposia》1996,102(1):47-54
Several hyperbranched polyesters have been prepared in a one-pot polycondensation reaction. Molecular weights, viscosities and rheological behavior of these polymers have been characterized. The influence of their terminal groups on the properties and their behavior in blends will be discussed. 相似文献
807.
Markus Antonietti Rimantas Kublickas Oskar Nuyken Brigitte Voit 《Macromolecular rapid communications》1997,18(4):287-294
Low-molar-mass surfactants (S) and polyelectrolytes (PE) containing diazosulfonate chromophores which are photo-labile and electrically charged were used for the formation of polyelectrolyte/surfactant complexes (PESC) in combination with commonly used polyelectrolytes and surfactants. The stable complexes are no longer water-soluble and were characterized by means of nuclear magnetic resonance spectroscopy and in some cases by means of gel-permeation chromatography measurements. Complexes with a 1 : 1 stoichiomctry with respect to charge are formed. Ultraviolet irradiation of the photo-labile PESC resulted in the loss of the ionic interactions. 相似文献
808.
809.
810.
Veera Bhadraiah Sadhu Jürgen Pionteck Dieter Voigt Hartmut Komber Brigitte Voit 《Macromolecular Symposia》2004,210(1):147-155
In order to obtain amino-terminated polymethyl methacrylate (PMMA-NH2) free of halogen we used the atom transfer radical polymerization (ATRP) to polymerize methyl methacrylate (MMA) in presence of an initiator containing an alkyl bromide unit and a protected amine functional group. The use of CuBr / N,N,N′,N′′,N′′-pentamethyldiethylenetriamine (PMDETA) as co-catalyst system results in a polymer free of halogen due to hydrogen transfer from PMDETA to the growing polymer chain. However, side reactions occur affecting the typically “living” character of the ATRP. The measured molecular weights are consistently higher than the theoretical ones and the molecular weight distributions are relatively broad. 相似文献