全文获取类型
收费全文 | 2851篇 |
免费 | 153篇 |
国内免费 | 13篇 |
专业分类
化学 | 2160篇 |
晶体学 | 10篇 |
力学 | 130篇 |
数学 | 327篇 |
物理学 | 390篇 |
出版年
2023年 | 31篇 |
2022年 | 59篇 |
2021年 | 58篇 |
2020年 | 67篇 |
2019年 | 65篇 |
2018年 | 43篇 |
2017年 | 36篇 |
2016年 | 89篇 |
2015年 | 81篇 |
2014年 | 94篇 |
2013年 | 147篇 |
2012年 | 217篇 |
2011年 | 256篇 |
2010年 | 124篇 |
2009年 | 142篇 |
2008年 | 218篇 |
2007年 | 205篇 |
2006年 | 207篇 |
2005年 | 199篇 |
2004年 | 172篇 |
2003年 | 135篇 |
2002年 | 116篇 |
2001年 | 52篇 |
2000年 | 29篇 |
1999年 | 20篇 |
1998年 | 21篇 |
1997年 | 21篇 |
1996年 | 24篇 |
1995年 | 8篇 |
1994年 | 9篇 |
1993年 | 8篇 |
1992年 | 14篇 |
1991年 | 4篇 |
1989年 | 2篇 |
1988年 | 6篇 |
1987年 | 3篇 |
1986年 | 1篇 |
1985年 | 2篇 |
1984年 | 3篇 |
1982年 | 3篇 |
1981年 | 5篇 |
1980年 | 1篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1974年 | 5篇 |
1973年 | 1篇 |
1971年 | 1篇 |
排序方式: 共有3017条查询结果,搜索用时 10 毫秒
71.
Electrochemical blocking is a type of single-entity electrochemical measurement particularly well adapted to the detection of insulating particles. The digital detection of ultralow concentrations of artificial entities such as polymer particles or biotargets such as proteins and bacteria represents an exceptional opportunity for sensing applications. In this review, we explore the latest development in the field of electrochemical blocking and propose some perspectives. 相似文献
72.
Dr. Alexia Ville Dr. Julien Annibaletto Dr. Sébastien Coufourier Prof. Christophe Hoarau Dr. Rodolphe Tamion Dr. Guillaume Journot Dr. Cédric Schneider Dr. Jean-François Brière 《Chemistry (Weinheim an der Bergstrasse, Germany)》2021,27(56):13961-13965
An efficient primary-amine-directed, palladium-catalyzed C−H halogenation (X=I, Br, Cl) of phenylalanine derivatives is reported on a range of quaternary amino acid (AA) derivatives thanks to suitable conditions employing trifluoroacetic acid as additive. The extension of this original native functionality-directed ortho-selective halogenation was even demonstrated with the more challenging native phenylalanine as tertiary AA. 相似文献
73.
Dr. Marta Meneghello Dr. Christophe Léger Dr. Vincent Fourmond 《Chemistry (Weinheim an der Bergstrasse, Germany)》2021,27(70):17542-17553
Only two enzymes are capable of directly reducing CO2: CO dehydrogenase, which produces CO at a [NiFe4S4] active site, and formate dehydrogenase, which produces formate at a mononuclear W or Mo active site. Both metalloenzymes are very rapid, energy-efficient and specific in terms of product. They have been connected to electrodes with two different objectives. A series of studies used protein film electrochemistry to learn about different aspects of the mechanism of these enzymes (reactivity with substrates, inhibitors…). Another series focused on taking advantage of the catalytic performance of these enzymes to build biotechnological devices, from CO2-reducing electrodes to full photochemical devices performing artificial photosynthesis. Here, we review all these works. 相似文献
74.
75.
Bimetallic Gold(I) Complexes with Ethynyl‐Helicene and Bis‐Phosphole Ligands: Understanding the Role of Aurophilic Interactions in their Chiroptical Properties
下载免费PDF全文
![点击此处可从《Chemistry (Weinheim an der Bergstrasse, Germany)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Dr. Mehdi El Sayed Moussa Dr. Hui Chen Zuoyong Wang Dr. Monika Srebro‐Hooper Dr. Nicolas Vanthuyne Dr. Soizic Chevance Prof. Christian Roussel Prof. J. A. Gareth Williams Prof. Jochen Autschbach Prof. Régis Réau Prof. Zheng Duan Dr. Christophe Lescop Dr. Jeanne Crassous 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(17):6075-6086
Monometallic gold(I)‐alkynyl‐helicene complexes ( 1 a , b ) and bimetallic gold(I)‐alkynyl‐helicene architectures featuring the presence ( 2 a , b ) or absence ( 3 a , b ) of aurophilic intramolecular interactions were prepared by using different types of phosphole ligands (mono‐phosphole L1 or bis‐phospholes L2 , 3 ). The influence of the AuI d10 metal center(s) on the electronic, photophysical, and chiroptical properties of these unprecedented phosphole‐gold(I)‐alkynyl‐helicene complexes was examined. Experimental and theoretical results highlight the importance of ligand‐to‐ligand‐type charge transfers and the strong effect of the presence or absence of AuI–AuI interactions in 2 a , b . 相似文献
76.
Dolorès Edmont Yvon Buisson Philippe Treillard Christophe Plisson Jacques Chenault 《合成通讯》2013,43(2):217-225
A high yielding N-amination of quinolones at low temperature via the use of O-mesitylenesulfonylhydroxylamine is reported. 相似文献
77.
78.
Laura Pop Pierrik Lassalas László Csaba Bencze Monica Ioana Toşa Botond Nagy Florin Dan Irimie Christophe Hoarau 《Tetrahedron: Asymmetry》2012,23(6-7):474-481
Stereoselective preparative enzymatic acylation and hydrolysis/methanolysis of various C-substituted rac-thiazol-2-yl-methanols were achieved for the preparation of enantiopure or enantiomerically enriched, naturally occurring 2-hydroxymethylthiazoles. The absolute configurations of the resulting secondary alcohols were determined by a detailed 1H NMR study of Mosher’s derivatives. 相似文献
79.
80.