全文获取类型
收费全文 | 243篇 |
免费 | 11篇 |
专业分类
化学工业 | 60篇 |
金属工艺 | 2篇 |
机械仪表 | 2篇 |
建筑科学 | 14篇 |
矿业工程 | 1篇 |
能源动力 | 2篇 |
轻工业 | 46篇 |
水利工程 | 2篇 |
石油天然气 | 1篇 |
无线电 | 12篇 |
一般工业技术 | 38篇 |
冶金工业 | 41篇 |
原子能技术 | 1篇 |
自动化技术 | 32篇 |
出版年
2023年 | 2篇 |
2022年 | 1篇 |
2021年 | 23篇 |
2020年 | 6篇 |
2019年 | 1篇 |
2018年 | 11篇 |
2017年 | 4篇 |
2016年 | 3篇 |
2015年 | 12篇 |
2014年 | 8篇 |
2013年 | 12篇 |
2012年 | 19篇 |
2011年 | 15篇 |
2010年 | 7篇 |
2009年 | 9篇 |
2008年 | 11篇 |
2007年 | 5篇 |
2006年 | 5篇 |
2005年 | 4篇 |
2004年 | 8篇 |
2003年 | 6篇 |
2002年 | 4篇 |
1999年 | 4篇 |
1998年 | 8篇 |
1997年 | 5篇 |
1996年 | 7篇 |
1995年 | 4篇 |
1994年 | 7篇 |
1993年 | 4篇 |
1992年 | 2篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 5篇 |
1987年 | 1篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 3篇 |
1981年 | 3篇 |
1980年 | 1篇 |
1978年 | 2篇 |
1976年 | 2篇 |
1974年 | 2篇 |
1972年 | 3篇 |
1969年 | 2篇 |
1968年 | 1篇 |
排序方式: 共有254条查询结果,搜索用时 312 毫秒
251.
C Chaves-López R Tofalo A Serio A Paparella G Sacchetti G Suzzi 《International journal of food microbiology》2012,159(1):39-46
This study investigated the possibility of using yeast strains in fermented milks to obtain products with high Angiotensin I-converting enzyme (ACE) inhibitory activity and low bitter taste. Ninety-three yeast strains isolated from Colombian Kumis in different geographic regions were molecularly identified, and their milk fermentation performances were determined. Molecular identification evidenced that Galactomyces geotrichum, Pichia kudriavzevii, Clavispora lusitaniae and Candida tropicalis, were the dominant species. Eighteen out of 93 strains produced fermented milk with ACE-inhibitory (ACEI) activity values ranging from 8.69 to 88.19%. Digestion of fermented milk samples by pepsin and pancreatin demonstrated an increase in ACEI activity, with C. lusitaniae KL4A as the best producer of ACEI peptides. Moreover, sensory analysis of the products containing the major ACE-inhibitory activity pointed out that P. kudriavzevii KL84A and Kluyveromyces marxianus KL26A could be selected as potential adjunct starter cultures in Kumis, since they made a considerable contribution to the ACE inhibitory activity and produced fermented milk without bitter taste. In this study we observed that Colombian Kumis can be an excellent vehicle for the isolation of yeasts with a potential to enhance bioactive peptides produced during milk fermentation. 相似文献
252.
Pellicciari R Filosa R Fulco MC Marinozzi M Macchiarulo A Novak C Natalini B Hermit MB Nielsen S Sager TN Stensbøl TB Thomsen C 《ChemMedChem》2006,1(3):358-365
The first series of 2'-substituted 2-(3'-carboxybicyclo[1.1.1]pentyl)glycine derivatives, (2R)- and (2S)-(2',2'-dichloro-3'-carboxybicyclo[1.1.1]pentyl)glycine (10) and (11), and 2-(2'-chloro-3'-carboxybicyclo[1.1.1]pentyl)glycine (12) were synthesized and evaluated as mGluR ligands. Compounds 11 and 12 were shown to be competitive group I mGluR antagonists. These results are also discussed in light of docking studies with both the active (closed) and inactive (open) conformations of mGluR1. 相似文献
253.
Fawcett Gillian; Heise Lori L.; Isita-Espejel Leticia; Pick Susan 《Canadian Metallurgical Quarterly》1999,54(1):41
This article describes the process of designing a multifaceted, community-based intervention to change community responses to wife abuse in Iztacalco, a low-income community on the outskirts of Mexico City. The goal of the intervention is to encourage women to recognize and disclose abuse and to encourage more constructive, less victim-blaming attitudes among family members, friends, and the community at large. The intervention is based on the belief that the response that a woman first gets upon disclosing her situation will be critical in setting the course of her future actions. The intervention includes small-scale media (e.g., buttons, posters, events) and a 12-session workshop to train women as community change agents. The design is based on insights derived from formative research and from the transtheoretical model of behavior change as elaborated by J. O. Prochaska and C. C. DiClemente (1982) and adapted to the special case of domestic violence by J. Brown (1997). The article also illustrates the utility of adapting popular education techniques to the research setting in order facilitate more honest disclosure of prevailing norms and attitudes about abuse. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
254.
Ramona DAmico Francesco Monaco Rosalba Siracusa Marika Cordaro Roberta Fusco Alessio Filippo Peritore Enrico Gugliandolo Rosalia Crupi Salvatore Cuzzocrea Rosanna Di Paola Daniela Impellizzeri Tiziana Genovese 《International journal of molecular sciences》2021,22(21)
Disseminated intravascular coagulation (DIC) is a severe condition characterized by the systemic formation of microthrombi complicated with bleeding tendency and organ dysfunction. In the last years, it represents one of the most frequent consequences of coronavirus disease 2019 (COVID-19). The pathogenesis of DIC is complex, with cross-talk between the coagulant and inflammatory pathways. The objective of this study is to investigate the anti-inflammatory action of ultramicronized palmitoylethanolamide (um-PEA) in a lipopolysaccharide (LPS)-induced DIC model in rats. Experimental DIC was induced by continual infusion of LPS (30 mg/kg) for 4 h through the tail vein. Um-PEA (30 mg/kg) was given orally 30 min before and 1 h after the start of intravenous infusion of LPS. Results showed that um-PEA reduced alteration of coagulation markers, as well as proinflammatory cytokine release in plasma and lung samples, induced by LPS infusion. Furthermore, um-PEA also has the effect of preventing the formation of fibrin deposition and lung damage. Moreover, um-PEA was able to reduce the number of mast cells (MCs) and the release of its serine proteases, which are also necessary for SARS-CoV-2 infection. These results suggest that um-PEA could be considered as a potential therapeutic approach in the management of DIC and in clinical implications associated to coagulopathy and lung dysfunction, such as COVID-19. 相似文献