全文获取类型
收费全文 | 633篇 |
免费 | 63篇 |
专业分类
电工技术 | 4篇 |
化学工业 | 186篇 |
金属工艺 | 19篇 |
机械仪表 | 44篇 |
建筑科学 | 17篇 |
矿业工程 | 1篇 |
能源动力 | 19篇 |
轻工业 | 129篇 |
水利工程 | 10篇 |
石油天然气 | 5篇 |
无线电 | 33篇 |
一般工业技术 | 110篇 |
冶金工业 | 14篇 |
原子能技术 | 4篇 |
自动化技术 | 101篇 |
出版年
2024年 | 2篇 |
2023年 | 12篇 |
2022年 | 28篇 |
2021年 | 45篇 |
2020年 | 41篇 |
2019年 | 41篇 |
2018年 | 66篇 |
2017年 | 40篇 |
2016年 | 44篇 |
2015年 | 28篇 |
2014年 | 35篇 |
2013年 | 65篇 |
2012年 | 46篇 |
2011年 | 58篇 |
2010年 | 21篇 |
2009年 | 23篇 |
2008年 | 24篇 |
2007年 | 15篇 |
2006年 | 11篇 |
2005年 | 5篇 |
2004年 | 9篇 |
2003年 | 7篇 |
2002年 | 4篇 |
2001年 | 4篇 |
2000年 | 2篇 |
1999年 | 4篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1985年 | 1篇 |
排序方式: 共有696条查询结果,搜索用时 15 毫秒
691.
Cholesterol-Containing Liposomes Decorated With Au Nanoparticles as Minimal Tunable Fusion Machinery
Ester Canepa Davide Bochicchio Giorgia Brosio Paulo Henrique Jacob Silva Francesco Stellacci Silvia Dante Giulia Rossi Annalisa Relini 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(23):2207125
Membrane fusion is essential for the basal functionality of eukaryotic cells. In physiological conditions, fusion events are regulated by a wide range of specialized proteins, operating with finely tuned local lipid composition and ionic environment. Fusogenic proteins, assisted by membrane cholesterol and calcium ions, provide the mechanical energy necessary to achieve vesicle fusion in neuromediator release. Similar cooperative effects must be explored when considering synthetic approaches for controlled membrane fusion. We show that liposomes decorated with amphiphilic Au nanoparticles (AuLips) can act as minimal tunable fusion machinery. AuLips fusion is triggered by divalent ions, while the number of fusion events dramatically changes with, and can be finely tuned by, the liposome cholesterol content. We combine quartz-crystal-microbalance with dissipation monitoring (QCM-D), fluorescence assays, and small-angle X-ray scattering (SAXS) with molecular dynamics (MD) at coarse-grained (CG) resolution, revealing new mechanistic details on the fusogenic activity of amphiphilic Au nanoparticles (AuNPs) and demonstrating the ability of these synthetic nanomaterials to induce fusion regardless of the divalent ion used (Ca2+ or Mg2+). The results provide a novel contribution to developing new artificial fusogenic agents for next-generation biomedical applications that require tight control of the rate of fusion events (e.g., targeted drug delivery). 相似文献
692.
Leso Bernardo Henrique Cortimiglia Marcelo Nogueira Ghezzi Antonio 《Cognition, Technology & Work》2023,25(1):151-179
Cognition, Technology & Work - Contributing to the scarce literature on how companies can deal with their business model of digital transition, this work explores the digital transformation... 相似文献
693.
Carlos Henrique Romoaldo Edson Luiz Francisquetti Douglas Alexandre Simon Juliano Roberto Ernze Eveline Bischoff 《大分子材料与工程》2023,308(2):2200458
Tetrafluoroethylene–perfluoroalkyl vinylether copolymer (PFA) has a broad application ranging from biomedical and aerospace to corroding environments in the chemical industry. Despite a low share in end-of-life products, PFA processing can produce up to 30% of waste. Thus, understanding how recycled fluorinated polymers affect product performance is crucial to ensure primary recycling, besides economic and environmental reasons. In this paper, the utilization feasibility of PFA waste materials is investigated, i.e., recycled PFA (PFAr) in closed-loop recycling. The effect of PFAr loading (5–100 wt.%) on the thermal, mechanical, rheological, and color properties and chemical resistance are studied. Thermal properties and chemical resistance showed no significant changes in all ranges of PFAr content tested. The addition of higher loads of PFAr (≥50 wt.%) leads to a reduction in mechanical properties, particularly stress-strength analysis and elongation at break. However, elastic modulus and hardness have improved concurrently with an increase in the degree of crystallinity. The decrease in complex viscosity and yellowing of the samples occurred probably induced by a polymer chain degradation. Despite that, the addition of up to 10 wt.% of PFAr proved to be an effective alternative to reusing PFA residues based on mechanical recycling. 相似文献
694.
Keoma Defáveri do Carmo e Silva Henrique Barbosa Andrade Alvarenga Saulo Ferreira Rocha Ricardo André Fiorotti Peixoto Guilherme Jorge Silva Brigolini 《International Journal of Applied Ceramic Technology》2023,20(5):2817-2828
In this study, synthesis, microstructural characteristics, mechanical properties, and environmental compatibility of alkali-activated binders derived from iron ore tailings (IOT)—with partial replacement with metakaolin (MK)—were investigated. The binders were produced with a NaOH solution, IOT, and MK. A thermal cure at 100°C was used and the MK was applied as a partial replacement of IOT in three proportions (10, 20, and 30 wt%). The IOT-based specimens presented an average of 98.0 and 18.0 MPa at 7 days age of curing for compressive and flexural strength, respectively. The mechanical properties of the alkali-activated binders with MK decreased as the substitution ratio increased. By the microstructural analysis, it was found a zeolite-type phase in alkali-activated IOT, while in the binders blended with MK, three new mineral phases were identified. Furthermore, Fourier transform infrared, quantitative X-ray diffraction, and environmental analysis suggest that the Fe species present in IOT acted in the alkali-activation reaction. 相似文献
695.
Francisco Rafael Campos de Macedo Rômulo Ribeiro Magalhães de Sousa José Wellinton Nogueira Junior Cleânio Luz-Lima Maxwell Santana Libório Anderson de Oliveira Lobo Vladimir Jesus Trava-Airoldi Fernanda Roberto Marciano Michelle Cequeira Feitor Thércio Henrique de Carvalho Costa Rubens Maribondo do Nascimento 《国际钢铁研究》2023,94(6):2200760
696.
do Nascimento Clístenes Williams Araújo da Silva Fernando Bruno Vieira Lima Luiz Henrique Vieira Silva Josévaldo Ribeiro de Lima Veloso Venâncio da Silva Franklone Lima de Freitas Sérgio Tonetto dos Santos Luana Ferreira dos Santos Monaliza Alves 《SILICON》2023,15(4):1647-1658
Silicon - Silicon (Si) acts to reduce biotic and abiotic stresses in plants. Herein, we aimed to assess the impact of an amorphous silica-based fertilizer (ASF) applied to soil on the yield,... 相似文献