全文获取类型
收费全文 | 1616篇 |
免费 | 49篇 |
国内免费 | 8篇 |
专业分类
电工技术 | 1篇 |
综合类 | 51篇 |
化学工业 | 818篇 |
金属工艺 | 31篇 |
机械仪表 | 39篇 |
建筑科学 | 6篇 |
矿业工程 | 81篇 |
能源动力 | 20篇 |
轻工业 | 323篇 |
水利工程 | 1篇 |
石油天然气 | 76篇 |
武器工业 | 11篇 |
无线电 | 5篇 |
一般工业技术 | 156篇 |
冶金工业 | 36篇 |
原子能技术 | 10篇 |
自动化技术 | 8篇 |
出版年
2023年 | 4篇 |
2022年 | 49篇 |
2021年 | 21篇 |
2020年 | 28篇 |
2019年 | 31篇 |
2018年 | 23篇 |
2017年 | 32篇 |
2016年 | 30篇 |
2015年 | 40篇 |
2014年 | 51篇 |
2013年 | 163篇 |
2012年 | 85篇 |
2011年 | 123篇 |
2010年 | 73篇 |
2009年 | 102篇 |
2008年 | 76篇 |
2007年 | 62篇 |
2006年 | 68篇 |
2005年 | 67篇 |
2004年 | 57篇 |
2003年 | 42篇 |
2002年 | 61篇 |
2001年 | 33篇 |
2000年 | 46篇 |
1999年 | 47篇 |
1998年 | 35篇 |
1997年 | 46篇 |
1996年 | 40篇 |
1995年 | 41篇 |
1994年 | 40篇 |
1993年 | 17篇 |
1992年 | 13篇 |
1991年 | 10篇 |
1990年 | 2篇 |
1989年 | 4篇 |
1988年 | 4篇 |
1987年 | 1篇 |
1985年 | 2篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1974年 | 1篇 |
排序方式: 共有1673条查询结果,搜索用时 109 毫秒
1.
2.
《Advanced Powder Technology》2022,33(11):103770
Kerosene is one of the most used collectors in graphite flotation, while its consumption undergoes an enormous increase, especially in amorphous graphite flotation, imposing heavy economic burdens and raising environmental concerns. In this work, a novel water-in-oil type kerosene emulsion was prepared, and its flotation performance as a collector on an amorphous graphite ore was examined and compared to pristine kerosene. An optimized emulsification process was developed based on the roughing flotation test. Particle size distribution analysis, optical microscope, and Cryo-SEM studies indicated homogenous and fine emulsified kerosene droplets in aqueous. More importantly, the open circuit flotation test proved emulsified kerosene as a superior collector to pristine kerosene in terms of enhancing the clean flotation efficiency of amorphous graphite. 相似文献
3.
4.
5.
6.
7.
8.
Cuiping Yu Shuang Sun Sihui Li Huijia Yan Henan Zou 《International Journal of Food Science & Technology》2022,57(2):1173-1185
In this study, the effect of high-intensity ultrasound (HIUS) (200 and 400 W for 0, 5, 10 and 15 min respectively) on conformational changes, physicochemical, rheological and emulsifying properties of scallop (Patinopecten yessoensis) myofibrillar protein (SMP) was investigated. HIUS-treated SMP had lower α-helix content and higher β-sheet content compared with the native SMP. HIUS treatment induced the unfolding of SMP and increased the surface hydrophobicity. The particle size of SMP decreased and the absolute zeta-potential increased after ultrasonication, which in turn increased the solubility of SMP. The conformational changes and the improvement of physicochemical properties of SMP increased the ability for SMP to lower the interfacial tension at the oil–water interface and increased the percentage of adsorbed protein. As a result, the emulsifying properties, rheological properties of SMP and storage stability of emulsions were also improved. In conclusion, HIUS treatment has future potential for improving the emulsifying properties of SMP. 相似文献
9.
Quoc Dat Lai Thi Thuy Loan Huynh Ngoc Thuc Trinh Doan Hoang Dung Nguyen 《International Journal of Food Science & Technology》2022,57(7):4337-4346
Wheat germ oil (WGO) is well-known as a good source of vegetable oil due to its nutrients and health benefits. Emulsification is a process that improves the incorporation of oil into food. High-pressure homogenisation (HPH) is a nonthermal and soft technique with enormous potential in oil-in-water emulsification. This paper focussed on the application of HPH for emulsification of WGO-in-water system. Influences of homogenisation pressure (100–300 bar), oil fraction (10–20% v/v) and lecithin adding (0–0.2% w/v of content) on the homogenisation were evaluated based on distribution of particles diameter and homogenisation efficiency. The increase in operating pressure and lecithin ratio decreased the particle size and increased the emulsion stability, and vice versa for oil fraction. The findings imply that the investigated factors significantly influenced particle size and emulsion system stability. The regression model between mean particle diameter and technical conditions of emulsion was established. With HPH treatment conditions of 300 bar operating pressure, 10% (v/v) oil fraction and 0.2% (w/v) lecithin created an emulsion system with a mean particle size of 3.32 µm, more than 50% of the volume of particles smaller than 1.5 µm of diameter and the homogenisation efficiency of 98.61%. HPH exhibits high efficiency and potential in WGO-in-water emulsification application. 相似文献
10.
Charles Reeb Christel Pierlot Catherine Davy David Lambertin 《Ceramics International》2021,47(6):7369-7385
Geopolymers, composed of an amorphous three-dimensional inorganic network and synthesized by the activation of a solid alumino-silicate precursor with an alkaline activating solution, have attracted increasing attention because of their environmental benefits and favorable characteristics. This review deals with the development of organic/inorganic composite materials made by adding organic liquids into inorganic geopolymer matrices. Firstly, the incorporation processing approaches are presented and are divided into three categories: (i) Direct incorporation, (ii) Pre-emulsification (iii) Solid impregnation. Their main advantages and drawbacks are discussed in relation to the aimed properties. Secondly, this review highlights that geopolymers are low-cost candidates allowing technologically significant applications, through the incorporation of various organic liquids. Aside from the well-studied immobilization of industrial waste streams commonly known as stabilization/solidification (S/S), the development of highly porous geopolymer foams and the design of reinforced organic/inorganic composite matrices are being notably investigated. This review aims at summarizing the main published results, and fostering further investigations into innovative uses of organic liquids incorporated into geopolymers for a wide range of applications. 相似文献