全文获取类型
| 收费全文 | 837篇 |
| 免费 | 45篇 |
| 国内免费 | 4篇 |
专业分类
| 耳鼻咽喉 | 4篇 |
| 儿科学 | 23篇 |
| 妇产科学 | 10篇 |
| 基础医学 | 168篇 |
| 口腔科学 | 104篇 |
| 临床医学 | 108篇 |
| 内科学 | 178篇 |
| 皮肤病学 | 7篇 |
| 神经病学 | 28篇 |
| 特种医学 | 31篇 |
| 外科学 | 86篇 |
| 综合类 | 1篇 |
| 预防医学 | 47篇 |
| 眼科学 | 10篇 |
| 药学 | 31篇 |
| 中国医学 | 2篇 |
| 肿瘤学 | 48篇 |
出版年
| 2023年 | 5篇 |
| 2022年 | 17篇 |
| 2021年 | 25篇 |
| 2020年 | 12篇 |
| 2019年 | 31篇 |
| 2018年 | 28篇 |
| 2017年 | 10篇 |
| 2016年 | 16篇 |
| 2015年 | 27篇 |
| 2014年 | 26篇 |
| 2013年 | 37篇 |
| 2012年 | 68篇 |
| 2011年 | 67篇 |
| 2010年 | 36篇 |
| 2009年 | 37篇 |
| 2008年 | 55篇 |
| 2007年 | 63篇 |
| 2006年 | 50篇 |
| 2005年 | 46篇 |
| 2004年 | 54篇 |
| 2003年 | 39篇 |
| 2002年 | 38篇 |
| 2001年 | 9篇 |
| 2000年 | 8篇 |
| 1999年 | 10篇 |
| 1998年 | 7篇 |
| 1997年 | 4篇 |
| 1996年 | 5篇 |
| 1995年 | 9篇 |
| 1994年 | 8篇 |
| 1993年 | 4篇 |
| 1991年 | 2篇 |
| 1990年 | 2篇 |
| 1989年 | 3篇 |
| 1988年 | 1篇 |
| 1986年 | 1篇 |
| 1985年 | 1篇 |
| 1984年 | 6篇 |
| 1983年 | 2篇 |
| 1982年 | 2篇 |
| 1980年 | 1篇 |
| 1977年 | 1篇 |
| 1976年 | 3篇 |
| 1975年 | 1篇 |
| 1974年 | 2篇 |
| 1973年 | 1篇 |
| 1971年 | 1篇 |
| 1942年 | 1篇 |
| 1904年 | 1篇 |
| 1903年 | 1篇 |
排序方式： 共有886条查询结果，搜索用时 7 毫秒
881.
Antonio Montefusco Fabrizio D'Ascenzo Sebastiano Gili Grzegorz Smolka Alaide Chieffo Andreas Baumbach Javier Escaned Paolo Sganzerla Francesco Tomassini Gioel Gabrio Secco Fabrizio Ugo Corrado Tamburino Annamaria Nicolino Massimo Mancone Arnaldo Poli Kuan‐Leong Yew Plinio Cirillo Wojciech Wanha Luigi Emilio Pastormerlo Roberto di Summa Gennaro Sardella Antonio Colombo Fiorenzo Gaita Bernardo Cortese 《Catheterization and cardiovascular interventions》2019,93(2):208-215
882.
883.
884.
Debora Kristina M. Alves Fábio Kummrow Arnaldo A. Cardoso Daniel A. Morales Gisela A. Umbuzeiro 《Environmental and molecular mutagenesis》2016,57(1):41-50
Atmospheric particulate matter (PM) is genotoxic and recently was classified as carcinogenic to humans by the International Agency for Research on Cancer. PM chemical composition varies depending on source and atmospheric conditions. The Salmonella/microsome assay is the most used mutagenicity test and can identify the major chemical classes responsible for observed mutagenicity. The objective of this work was to characterize the mutagenicity of PM samples from a countryside city, Limeira, Brazil, which is influenced by heavy traffic and sugar cane biomass burning. Six samples of total PM were collected. Air mass backward trajectories were calculated. Organic extracts were assayed using the Salmonella/microsome microsuspension mutagenicity assay using TA98, YG1041, and TA1538, with and without metabolic activation (S9). YG1041 was the most sensitive strain and mutagenicity reached 9,700 revertants per m3 without metabolic activation. Potency for TA1538 was higher than TA98, indicating that this strain should be considered in air mutagenicity studies. The increased response to YG1041 relative to TA98, and the decreased response with S9, suggests that nitroaromatics are the major contributors. Limeira is among the most mutagenic cities in the world. High mutagenicity in Limeira seems to occur when the air mass from the area of sugarcane production is mixed with air from the region impacted by anthropogenic activities such as traffic. An increase in the formation of nitro‐polycyclic aromatic hydrocarbons may result from longer contact time between the aromatic compounds and the atmosphere with high NOx and ozone concentration, although more studies are required to confirm this hypothesis. Environ. Mol. Mutagen. 57:41–50, 2016. © 2015 Wiley Periodicals, Inc. 相似文献
885.
886.
Valerio D'Agostino Stefano Genovese Alessandro Monaci Arnaldo Stanzione Mario Magliulo Stefania Daniele Mariagiovanna di Palo Simone Maurea Pier Paolo Mainenti 《Radiology Case Reports》2021,16(11):3369
Portal venous aneurysm is a rare and potential dangerous vascular pathology, which can result in thrombosis or rupture. It may be congenital or acquired. Acquired form can be related mainly to portal hypertension, chronic hepatic disease, and trauma. We present a peculiar case of a congenital aneurysm involving the hepatic portal system in nearly all its extra-hepatic components: the main portal trunk, the spleno-porto-mesenteric confluence and the distal segment of splenic, superior, and inferior mesenteric veins, in a 20-year-old male patient. The aneurysm was complicated by massive thrombosis in absence of further predisposing factors. 相似文献