全文获取类型
收费全文 | 224篇 |
免费 | 3篇 |
专业分类
电工技术 | 5篇 |
化学工业 | 101篇 |
金属工艺 | 4篇 |
机械仪表 | 6篇 |
建筑科学 | 3篇 |
能源动力 | 5篇 |
轻工业 | 3篇 |
水利工程 | 3篇 |
石油天然气 | 13篇 |
无线电 | 10篇 |
一般工业技术 | 44篇 |
冶金工业 | 11篇 |
原子能技术 | 9篇 |
自动化技术 | 10篇 |
出版年
2023年 | 3篇 |
2022年 | 19篇 |
2021年 | 17篇 |
2020年 | 8篇 |
2019年 | 4篇 |
2018年 | 6篇 |
2017年 | 10篇 |
2016年 | 3篇 |
2015年 | 4篇 |
2014年 | 9篇 |
2013年 | 9篇 |
2012年 | 10篇 |
2011年 | 13篇 |
2010年 | 4篇 |
2009年 | 3篇 |
2008年 | 9篇 |
2007年 | 11篇 |
2006年 | 1篇 |
2005年 | 7篇 |
2004年 | 6篇 |
2003年 | 3篇 |
2002年 | 3篇 |
2001年 | 4篇 |
2000年 | 4篇 |
1999年 | 1篇 |
1998年 | 8篇 |
1997年 | 1篇 |
1994年 | 1篇 |
1993年 | 3篇 |
1991年 | 1篇 |
1987年 | 3篇 |
1985年 | 3篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 8篇 |
1975年 | 2篇 |
1974年 | 3篇 |
1973年 | 3篇 |
1972年 | 2篇 |
1971年 | 5篇 |
1970年 | 2篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1967年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有227条查询结果,搜索用时 15 毫秒
21.
Genesis of the Surface Structure of Armos Fibre 总被引:1,自引:0,他引:1
S. I. Banduryan M. M. Iovleva A. I. Zhuravleva A. M. Shchetinin N. N. Machalaba G. A. Budnitskii 《Fibre Chemistry》2002,34(6):422-425
Formation of folds positioned perpendicular to the axis of the fibre onthe surfade of Armos fibre in the first stage of spinning was demonstrated by scanning electron microscopy. In the intermediate stages of spinning, the transverse folds are transformed into longitudinal intersecting grooves. The formation of transverse folds is not a funcito nof the nature and composition fo the precipitant. An incrsae in die drawing causes the disappearance of the folds in the first stage of spinning, but the intersedting grooves persist on the sruface of the fibre. The finished Armos fibre has a characteristic surface structure represented by intersecting grooves positioned along the axis fo the fibre. 相似文献
22.
Andrey Boroda Yuliya Privar Mariya Maiorova Irina Beleneva Marina Eliseikina Anna Skatova Dmitry Marinin Svetlana Bratskaya 《International journal of molecular sciences》2022,23(20)
The potential of chitosan and carboxymethyl chitosan (CMC) cryogels cross-linked with diglycidyl ether of 1,4-butandiol (BDDGE) and poly(ethylene glycol) (PEGDGE) have been compared in terms of 3D culturing HEK-293T cell line and preventing the bacterial colonization of the scaffolds. The first attempts to apply cryogels for the 3D co-culturing of bacteria and human cells have been undertaken toward the development of new models of host–pathogen interactions and bioimplant-associated infections. Using a combination of scanning electron microscopy, confocal laser scanning microscopy, and flow cytometry, we have demonstrated that CMC cryogels provided microenvironment stimulating cell–cell interactions and the growth of tightly packed multicellular spheroids, while cell–substrate interactions dominated in both chitosan cryogels, despite a significant difference in swelling capacities and Young’s modulus of BDDGE- and PEGDGE-cross-linked scaffolds. Chitosan cryogels demonstrated only mild antimicrobial properties against Pseudomonas fluorescence, and could not prevent the formation of Staphylococcus aureus biofilm in DMEM media. CMC cryogels were more efficient in preventing the adhesion and colonization of both P. fluorescence and S. aureus on the surface, demonstrating antifouling properties rather than the ability to kill bacteria. The application of CMC cryogels to 3D co-culture HEK-293T spheroids with P. fluorescence revealed a higher resistance of human cells to bacterial toxins than in the 2D co-culture. 相似文献
23.
24.
25.
Barton Jason J. S.; Cherkasova Mariya V.; Lindgren Kristen A.; Goff Donald C.; Manoach Dara S. 《Canadian Metallurgical Quarterly》2005,114(1):75
Although perseveration is sometimes attributed to defective set switching, the authors have recently shown that set-switching is normal in schizophrenia. In this article, the authors tested for persistent states of the saccadic response system, rather than set perseveration. Schizophrenic and healthy subjects performed antisaccades and prosaccades. The authors analyzed for 3 carry-over effects. First, whereas the latency of the current saccade correlated with that of the prior saccade in both groups, the correlations under mixed-task conditions declined in healthy but not in schizophrenic subjects. Second, antisaccades in penultimate trials delayed upcoming saccades in schizophrenic but not in healthy subjects. Third, schizophrenic subjects were more likely to erroneously perseverate the direction of a prior antisaccade but not a prior prosaccade. The authors concluded that, in schizophrenia, the effects of correct antisaccades are persistent not weak. Saccades in schizophrenia are characterized by perseveration of antisaccade-induced changes in the saccadic response system rather than failures to switch task set. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
26.
27.
28.
Mariya Badakh Ushakov 《Russian Journal of Nondestructive Testing》2005,41(12):830-831
Exhibitions, Conferences
Dear Colleagues! 相似文献29.
30.