全文获取类型
收费全文 | 735篇 |
免费 | 57篇 |
国内免费 | 2篇 |
专业分类
电工技术 | 9篇 |
综合类 | 1篇 |
化学工业 | 186篇 |
金属工艺 | 10篇 |
机械仪表 | 27篇 |
建筑科学 | 87篇 |
矿业工程 | 2篇 |
能源动力 | 21篇 |
轻工业 | 84篇 |
水利工程 | 7篇 |
无线电 | 50篇 |
一般工业技术 | 156篇 |
冶金工业 | 17篇 |
原子能技术 | 2篇 |
自动化技术 | 135篇 |
出版年
2024年 | 1篇 |
2023年 | 8篇 |
2022年 | 15篇 |
2021年 | 25篇 |
2020年 | 19篇 |
2019年 | 23篇 |
2018年 | 19篇 |
2017年 | 25篇 |
2016年 | 34篇 |
2015年 | 31篇 |
2014年 | 34篇 |
2013年 | 59篇 |
2012年 | 41篇 |
2011年 | 43篇 |
2010年 | 40篇 |
2009年 | 31篇 |
2008年 | 46篇 |
2007年 | 39篇 |
2006年 | 31篇 |
2005年 | 33篇 |
2004年 | 23篇 |
2003年 | 17篇 |
2002年 | 23篇 |
2001年 | 7篇 |
2000年 | 19篇 |
1999年 | 16篇 |
1998年 | 21篇 |
1997年 | 11篇 |
1996年 | 13篇 |
1995年 | 4篇 |
1994年 | 7篇 |
1993年 | 4篇 |
1992年 | 1篇 |
1991年 | 4篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1987年 | 3篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1980年 | 3篇 |
1979年 | 1篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1972年 | 1篇 |
1971年 | 4篇 |
排序方式: 共有794条查询结果,搜索用时 78 毫秒
791.
Julia Ackermann Jan Stegemann Tim Smola Eline Reger Sebastian Jung Anne Schmitz Svenja Herbertz Luise Erpenbeck Karsten Seidl Sebastian Kruss 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(14):2206856
Biochemical processes are fast and occur on small-length scales, which makes them difficult to measure. Optical nanosensors based on single-wall carbon nanotubes (SWCNTs) are able to capture such dynamics. They fluoresce in the near-infrared (NIR, 850–1700 nm) tissue transparency window and the emission wavelength depends on their chirality. However, NIR imaging requires specialized indium gallium arsenide (InGaAs) cameras with a typically low resolution because the quantum yield of normal Si-based cameras rapidly decreases in the NIR. Here, an efficient one-step phase separation approach to isolate monochiral (6,4)-SWCNTs (880 nm emission) from mixed SWCNT samples is developed. It enables imaging them in the NIR with high-resolution standard Si-based cameras (>50× more pixels). (6,4)-SWCNTs modified with (GT)10-ssDNA become highly sensitive to the important neurotransmitter dopamine. These sensors are 1.7× brighter and 7.5× more sensitive and allow fast imaging (<50 ms). They enable high-resolution imaging of dopamine release from cells. Thus, the assembly of biosensors from (6,4)-SWCNTs combines the advantages of nanosensors working in the NIR with the sensitivity of (Si-based) cameras and enables broad usage of these nanomaterials. 相似文献
792.
Oliver Lohrberg Karsten Voigt Sebastian Maletti Henry Auer Kristian Nikolowski Christian Heubner Alexander Michaelis 《Advanced functional materials》2023,33(24):2214891
Zero-excess Li metal batteries (ZELMBs), in which a Li-anode is formed in situ during charging, have received much attention in recent years. ZELMBs bear great potential to increase energy density and facilitate battery production, thereby reducing cost as well as material and energy consumption. Practical application of ZELMBs has so far been limited by challenges related to the non-uniform deposition behavior of Li, leading to inadequate performance and safety concerns. To address these issues, promising approaches have been developed in recent years, including modifications of the current collector, electrolyte, and cycling protocols. While these approaches improve the long-term stability of ZELMB, they also reduce the energy density by introducing inactive materials into the cell. Herein, critical design criteria for the various optimization approaches in ZELMB research are established. Nominal volumetric and gravimetric energy densities are determined based on the degree of modification. Thresholds are determined for each of the strategies at which the energy density gain of ZELMB vanishes compared to other cell configurations. These findings are compared to literature results to provide guidance for the further development of ZELMB. 相似文献
793.
Mono‐ and bicyclic hydroquinones and hydroquinone monomethyl ethers 1, 2 are oxidized in 82—91% yield to the corresponding quinones using only 2 mol% of ceric ammonium nitrate (CAN) and 2.5 equivalents of tert‐butyl hydroperoxide. 相似文献
794.
Dr. Bernadette Tse Sum Bui Prof. Karsten Haupt 《Chembiochem : a European journal of chemical biology》2022,23(8):e202100598
Cancer is a leading cause of death worldwide and according to the World Health Organization (WHO) accounted for 10 million deaths in 2020. Promising theranostic (therapy and diagnostic) agents in the treatment of cancer are nanomaterials, which have come to the forefront because of their small size approaching those of protein complexes in the human body, and of their easy functionalization giving access to nanocomposite materials with diverse functions (fluorescence, magnetic, stimuli-responsiveness, etc.), and improved biocompatibility. Among them, affinity nanoparticles, often decorated with highly specific targeting ligands such as antibodies, aptamers, lectins and peptides, have enabled enhanced binding and exquisite recognition of biomarkers overexpressed in cancer cells. In this review, we describe an emerging class of targeting ligands, molecularly imprinted polymer hydrogel nanoparticles for their application in the early detection of disease, with the aim to improve diagnosis and treatment. 相似文献