全文获取类型
收费全文 | 590篇 |
免费 | 27篇 |
专业分类
电工技术 | 4篇 |
化学工业 | 166篇 |
金属工艺 | 13篇 |
机械仪表 | 5篇 |
建筑科学 | 16篇 |
矿业工程 | 1篇 |
能源动力 | 13篇 |
轻工业 | 101篇 |
水利工程 | 1篇 |
石油天然气 | 3篇 |
无线电 | 30篇 |
一般工业技术 | 100篇 |
冶金工业 | 105篇 |
原子能技术 | 2篇 |
自动化技术 | 57篇 |
出版年
2023年 | 6篇 |
2022年 | 13篇 |
2021年 | 20篇 |
2020年 | 12篇 |
2019年 | 16篇 |
2018年 | 14篇 |
2017年 | 20篇 |
2016年 | 15篇 |
2015年 | 15篇 |
2014年 | 20篇 |
2013年 | 35篇 |
2012年 | 37篇 |
2011年 | 47篇 |
2010年 | 18篇 |
2009年 | 28篇 |
2008年 | 25篇 |
2007年 | 20篇 |
2006年 | 15篇 |
2005年 | 14篇 |
2004年 | 10篇 |
2003年 | 18篇 |
2002年 | 14篇 |
2001年 | 8篇 |
2000年 | 2篇 |
1999年 | 7篇 |
1998年 | 37篇 |
1997年 | 15篇 |
1996年 | 20篇 |
1995年 | 12篇 |
1994年 | 6篇 |
1993年 | 15篇 |
1992年 | 7篇 |
1990年 | 4篇 |
1989年 | 7篇 |
1988年 | 2篇 |
1987年 | 5篇 |
1986年 | 5篇 |
1985年 | 5篇 |
1984年 | 2篇 |
1982年 | 4篇 |
1981年 | 2篇 |
1978年 | 2篇 |
1976年 | 3篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1970年 | 1篇 |
1965年 | 1篇 |
1964年 | 1篇 |
1963年 | 1篇 |
1960年 | 2篇 |
排序方式: 共有617条查询结果,搜索用时 15 毫秒
611.
Analytical Method for Pesticides in Avocado and Papaya by Means of Ultra‐High Performance Liquid Chromatography Coupled to a Triple Quadrupole Mass Detector: Validation and Uncertainty Assessment
下载免费PDF全文
![点击此处可从《Journal of food science》网站下载免费的PDF全文](/ch/ext_images/free.gif)
612.
613.
Norma Daniela González Enriquez Rosalba Patiño-Herrera Rafael Catarino-Centeno Gabriela Palestino Armando Almendárez Camarillo Elías Pérez 《Polymer Engineering and Science》2023,63(1):219-229
Concerned about environmental pollution, and aware of the comfort that polyethylene provides for daily human life, this work sought to replace a percentage of high-density polyethylene (HDPE) with human or bovine hair. Hair is natural, abundant, light weight, non-toxic, and disposed of as garbage. The main disadvantage of natural composites is the interfacial adhesion. To increase the interfacial adhesion between hair and HDPE, stearic acid or oleic acid was chemically anchored on the hair surface, which leads to an improved contact angle hysteresis and hydrophobicity. Dynamic-mechanical properties of the composites were investigated focusing on the type of carboxylic acid used (stearic or oleic acid), hair length, hair type (human or bovine) and amount of hair used in the composite. Taking 40°C as a reference, using 15% of hair with a length of 1 ± 0.15 mm, the highest storage modulus value was obtained with HDPE with human hair modified with oleic acid, exceeding the value of the storage modulus of HDPE by 67.64%. Increasing storage modulus on composites indicates of interfacial interaction and chemical affinity improvement between hair and polyethylene. 相似文献
614.
Leila M. Saleh Medina Antonela Cánneva Fabricio N. Molinari Norma D'Accorso R. Martín Negri 《Polymer Engineering and Science》2023,63(2):366-378
The objective of this work is to prepare absorbent materials based on polydimethylsiloxane (PDMS) for the absorption of organic solvents by a relative simple method, with large absorption capacities and reusability. Different particles (ZnO, MgSO4, ZnCl2, and NaHCO3) were first incorporated in PDMS and then removed by immersion in HCl (c) or water. The absorbent materials were characterized by TGA, mercury porosimetry, stress–strain curves, SEM, EDS, XPS, FTIR, and water contact angle. The materials can absorb polar organic chlorinated solvents (carbon tetrachloride, dichloroethene, dichloromethane, and chloroform) more than four times its own weight. Other solvents were also tested showing 2–3 times its own weight. Additionally, these materials show demulsification properties and absorption of oleophilic compounds. The reusability of the material makes them good candidates for remediation of polluted water. 相似文献
615.
616.
617.
Dr. Guillaume Gerbaud Brice Barbat Mathilde Tribout Dr. Emilien Etienne Prof. Valérie Belle Dr. Badreddine Douzi Dr. Romé Voulhoux Dr. Alessio Bonucci 《Chembiochem : a European journal of chemical biology》2023,24(15):e202300099
The type 2 secretion system (T2SS) is a bacterial nanomachine composed of an inner membrane assembly platform, an outer membrane pore and a dynamic endopilus. T2SS endopili are organized into a homo-multimeric body formed by the major pilin capped by a heterocomplex of four minor pilins. The first model of the T2SS endopilus was recently released, even if structural dynamics insights are still required to decipher the role of each protein in the full tetrameric complex. Here, we applied continuous-wave and pulse EPR spectroscopy using nitroxide-gadolinium orthogonal labelling strategies to investigate the hetero-oligomeric assembly of the minor pilins. Overall, our data are in line with the endopilus model even if they evidenced conformational flexibility and alternative orientations at local scale of specific regions of minor pilins. The integration of different labelling strategies and EPR experiments demonstrates the pertinence of this approach to investigate protein–protein interactions in such multiprotein heterocomplexes. 相似文献