全文获取类型
收费全文 | 180篇 |
免费 | 3篇 |
国内免费 | 1篇 |
专业分类
化学 | 118篇 |
晶体学 | 2篇 |
力学 | 2篇 |
数学 | 44篇 |
物理学 | 18篇 |
出版年
2024年 | 1篇 |
2023年 | 1篇 |
2022年 | 5篇 |
2021年 | 7篇 |
2020年 | 5篇 |
2019年 | 6篇 |
2018年 | 5篇 |
2017年 | 3篇 |
2016年 | 11篇 |
2015年 | 4篇 |
2014年 | 8篇 |
2013年 | 12篇 |
2012年 | 8篇 |
2011年 | 18篇 |
2010年 | 3篇 |
2009年 | 6篇 |
2008年 | 9篇 |
2007年 | 10篇 |
2006年 | 11篇 |
2005年 | 10篇 |
2004年 | 5篇 |
2003年 | 9篇 |
2002年 | 3篇 |
2001年 | 3篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 3篇 |
1996年 | 3篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1991年 | 1篇 |
1983年 | 1篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1975年 | 2篇 |
1974年 | 1篇 |
排序方式: 共有184条查询结果,搜索用时 0 毫秒
31.
Annamaria Barbagallo 《PAMM》2007,7(1):2060035-2060036
In this paper we consider the dynamic spatial price equilibrium problem and the associated evolutionary variational inequality. In particular the regularity of equilibrium solutions is studied and a method for solving the dynamic spatial price equilibrium problem is presented. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
32.
Annamaria Varga Valentin Zaharia Mihály Nógrádi László Poppe 《Tetrahedron: Asymmetry》2013,24(21-22):1389-1394
Ethyl (S)-3-hydroxy-3-phenylpropionate (S)-2 was obtained by the asymmetric reduction of ethyl 3-phenyl-3-oxopropionate 1 with the yeast Saccharomyces cerevisiae (ATCC 9080). The kinetic resolution of racemic ethyl 2-acetoxy-3-phenyl-propionate rac-3 with the same microorganism, gave after hydrolysis ethyl (R)- and (S)-3-hydroxy-3-phenylpropionates (R)-2 and (S)-2 which were converted by a straightforward series of reactions to the enantiomers of 3-amino-3-phenyl-propionic acids (S)-6 and (R)-6. The asymmetric reduction and hydrolytic kinetic resolution were also tested with several other whole cell systems under a variety of conditions. 相似文献
33.
Ilario Losito Fabio Mavelli Annamaria Demarinis Loiotile Francesco Palmisano 《Analytica chimica acta》2012
A simple software, to be used as an aid in the identification of non-tryptic peptides based on low resolution (3D-ion trap) tandem (MS/MS) and sequential (MS3) mass spectrometry data, is presented. 相似文献
34.
Michael Esseling Annamaria Zaltron Nicola Argiolas Giovanni Nava Jörg Imbrock Ilaria Cristiani Cinzia Sada Cornelia Denz 《Applied physics. B, Lasers and optics》2013,113(2):191-197
We investigate the applicability of highly reduced lithium niobate samples doped with iron for the use as optoelectronic tweezers. Increasing the reduction degree of Fe-doped lithium niobate is well known to increase the photoconductivity and reduce the writing time of internal space-charge fields. Based on our measurements of the photorefractive properties, we determine the optimal conditions for dielectrophoretic trapping and present the application of Fe-doped lithium niobate as optoelectronic tweezers. For higher reduction degrees, an unexpected decrease in the photovoltaic current density and the saturation space-charge field is reported. 相似文献
35.
Annamaria Palamara Orsi. 《Mathematics of Computation》1996,65(215):1201-1212
We introduce a new numerical approach for solving Volterra integral equations of the second kind when the kernel contains a mild singularity. We give a convergence result. We also present numerical examples which show the performance and efficiency of our method.
36.
Annamaria Guagliardi Laura Cerchia Mosè Rossi 《Applied biochemistry and biotechnology》1997,62(1):37-46
The chaperonin of the hyperthermophilic archaeonSulfolobus solfataricus, briefly Ssocpn, was purified by a fast and high-yield procedure. Ssocpn, a 920 kDa-complex of two different subunits, displays
a potassium-dependent ATPase activity with a temperature optimum at 80°C. The ability of Ssocpn to function in vitro was investigated
using different protein substrates. Ssocpn promotes correct refolding of thermophilic and mesophilic enzymes from their chemically
unfolded state; moreover, Ssocpn prevents the irreversible inactivation of native proteins by suppressing their precipitation
upon heating. Both the activity in assisting refolding of unfolded proteins and that in preventing heat denaturation of native
proteins require the hydrolysis of ATP.
The chaperone-based strategies in different technological fields are discussed, and the advantages in using archaeal chaperonins
are underlined. 相似文献
37.
Anna Maria Manotti Lanfredi Franco Ugozzoli Annamaria Camus Nazario Marsich 《Journal of chemical crystallography》1995,25(1):37-41
The title compound was synthesized by CS2 insertion in the C-M bonds of the corresponding AgLi ate organomental compound. It contains flattened tetrahedral Ag4 units, connected in polymeric chains by intermolecular Ag...S interactions. Two Ag atoms and three S atoms are in a distorted square pyramidal arrangement around each silver atom. The crystals are tetragonal, space group 141/a witha=23.706(2) andc=12.934(2) Å. The structure was refined toR=0.032 for 889 reflections. 相似文献
38.
Henri Brunner Rainer Lukas Annamaria Woditsch 《Journal of organometallic chemistry》1978,161(2):C49-C52
(η-C5H5)(CO)2W[(η3-C5H5)(C5H5)2], I, containing two tilted five-membered rings, is converted into the bridged ferrocene derivative (η-C5H5)(CO)2W{(η3-C5H5)}[(η-C5 H4)2Fe]} II by successive reaction with Na and FeCl2. 相似文献
39.
Occhiato EG Prandi C Ferrali A Guarna A Deagostino A Venturello P 《The Journal of organic chemistry》2002,67(20):7144-7146
Alkoxydienyl- and alkoxystyrylboronates were used for Pd-catalyzed cross-coupling reactions with lactam-derived vinyl triflates. The hydrolysis of the coupling products with alkoxystyrylboronates provided the corresponding alpha-acyl-substituted 3,4-dihydro-(2H)-pyridines and 2,3,4,5-tetrahydroazepines in good to high yields. The hydrolysis of the coupling products with alkoxydienylboronates, performed in the presence of Amberlyst 15, resulted in a Nazarov-type cyclization that afforded hexahydro[1]pyrindin-7-ones and 3,4,5,6,7,8-hexahydro-(2H)-cyclopenta[b]azepin-8-ones. This methodology represents a novel and efficient procedure for the preparation of these classes of azacyclic compounds. 相似文献
40.