全文获取类型
收费全文 | 11504篇 |
免费 | 638篇 |
国内免费 | 87篇 |
专业分类
耳鼻咽喉 | 94篇 |
儿科学 | 359篇 |
妇产科学 | 192篇 |
基础医学 | 1958篇 |
口腔科学 | 270篇 |
临床医学 | 898篇 |
内科学 | 2301篇 |
皮肤病学 | 178篇 |
神经病学 | 1091篇 |
特种医学 | 554篇 |
外科学 | 1495篇 |
综合类 | 69篇 |
一般理论 | 7篇 |
预防医学 | 1092篇 |
眼科学 | 177篇 |
药学 | 904篇 |
中国医学 | 15篇 |
肿瘤学 | 575篇 |
出版年
2022年 | 74篇 |
2021年 | 196篇 |
2020年 | 120篇 |
2019年 | 156篇 |
2018年 | 174篇 |
2017年 | 162篇 |
2016年 | 197篇 |
2015年 | 224篇 |
2014年 | 304篇 |
2013年 | 362篇 |
2012年 | 537篇 |
2011年 | 576篇 |
2010年 | 333篇 |
2009年 | 346篇 |
2008年 | 506篇 |
2007年 | 612篇 |
2006年 | 548篇 |
2005年 | 584篇 |
2004年 | 592篇 |
2003年 | 560篇 |
2002年 | 552篇 |
2001年 | 325篇 |
2000年 | 299篇 |
1999年 | 279篇 |
1998年 | 207篇 |
1997年 | 177篇 |
1996年 | 145篇 |
1995年 | 128篇 |
1994年 | 114篇 |
1993年 | 96篇 |
1992年 | 164篇 |
1991年 | 146篇 |
1990年 | 153篇 |
1989年 | 160篇 |
1988年 | 134篇 |
1987年 | 131篇 |
1986年 | 138篇 |
1985年 | 117篇 |
1984年 | 105篇 |
1983年 | 77篇 |
1982年 | 79篇 |
1981年 | 81篇 |
1980年 | 82篇 |
1979年 | 88篇 |
1978年 | 57篇 |
1977年 | 78篇 |
1976年 | 71篇 |
1975年 | 72篇 |
1974年 | 49篇 |
1973年 | 70篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Michels Guido Horn Rudolf Helfen Andreas Hagendorff Andreas Jung Christian Hoffmann Beatrice Jaspers Natalie Kinkel Horst Greim Clemens-Alexander Knebel Fabian Bauersachs Johann Busch Hans-Jörg Kiefl Daniel Spiel Alexander O. Marx Gernot Dietrich Christoph F. 《Der Anaesthesist》2022,71(4):307-310
Die Anaesthesiologie - 相似文献
2.
3.
Rocha Déborah Ribeiro Nery Jaqueline Freire Furini Leonardo Negri Constantino Carlos José Leopoldo Eller Lizziane Kretli Winkelströter Nai Gisele Alborghetti Nakagaki Wilson Romero 《Lasers in medical science》2020,35(8):1703-1709
Lasers in Medical Science - Studies reported the harmful effects of 2,4-D on body tissues, provoking changes in the anatomy and physiology of the kidneys, liver, and testicles. Thus, the objective... 相似文献
4.
5.
6.
7.
Christer Lunde Gjerstad Hans Jakob Bøe Erik Falkum Egil Wilhelm Martinsen Andreas Espetvedt Nordstrand Arnfinn Tønnesen Jon Gerhard Reichelt June Ullevoldsæter Lystad 《Journal of traumatic stress》2020,33(5):762-772
Peacekeeping missions involve experiences that may impact the mental health of participating soldiers. However, research on the long-term mental health consequences of peacekeeping is sparse. The present study aimed to find the prevalence of mental health problems (MHPs), possible MHP predictors, and associations between predictors and MHPs in Norwegian peacekeepers 18–38 years after deployment to a United Nations peacekeeping mission. We used data from a cross-sectional, postdeployment survey of Norwegian peacekeepers who served in Lebanon between 1978 and 1998 (N = 10,605). Participants were assessed for posttraumatic stress disorder (PTSD); anxiety; depression; insomnia; alcohol misuse; drug misuse; and exposure to pre-, peri-, and postdeployment stressors. Logistic regressions were executed to explore key variables associated with MHPs. Total MHP prevalence was 15.1%, 95% CI [14.4, 15.8]. The estimates for specific disorders were 0.1% for drug misuse, 3.4% for alcohol misuse, 4.0% for depression, 6.2% for PTSD, 6.4% for anxiety, and 9.3% for insomnia. Postdeployment stressors, OR = 1.91, 95% CI [1.79, 2.04]; employment status, OR = 1.41, 95% CI [1.33, 1.48]; and traumatic exposure during deployment, OR = 1.11, 95% CI [1.09, 1.12], were positively related to PTSD, χ2(17, N = 8,568) = 1,791.299, p < .001. Similar patterns were found for the other MHPs. Considering that most participants (84.9%) reported low symptom levels, our findings challenge the widespread public perception that most peacekeepers have MHPs. Moreover, our results indicate that future peacekeepers should be prepared for challenges they may face not only during deployment but also in the years following their homecoming. 相似文献
8.
The experimental infection of immunocompetent and immunodeficient athymic mice with an avirulent encephalitogenic Toxoplasma strain (DX strain) was employed to study the ensuing encephalitic process by use of histological and immunocytochemical methods. In the acute phase of the infection Toxoplasma cysts and tachyzoites were accompanied by an infiltrate composed of macrophages, CD4+ and CD8+ T cells. In the chronic stage a granulomatous encephalitis developed. In contrast to immunocompetent NMRI mice, athymic nude NMRI mice died 3 weeks post-infection because of a generalized toxoplasmosis with predominant involvement of the brain. A salient feature of murine Toxoplasma encephalitis was up-regulation of class I and II major histocompatibility complex (MHC) gene products. Class I antigen was widely expressed on microglial cells and astrocytes. Class II antigen was only expressed on microglial cells despite a considerable astrogliosis. Our results indicate a differential expression of MHC-determined antigens on brain cells in acute and chronic murine Toxoplasma encephalitis. 相似文献
9.
Hypomagnesemia due to isolated renal magnesium loss was demonstrated in two unrelated families with autosomal dominant mode of inheritance. Magnesium infusions performed in two patients showed not only a reduced renal magnesium threshold but also a lowered renal tubular maximum for magnesium. All members of both families who presented with hypomagnesemia had also a lowered excretion of calcium in the urine, presumably as a consequence of increased reabsorption in Henle's loop. 相似文献
10.
Dr. Med. Wolfgang Rutsch Horst Schmutzler 《Cardiovascular and interventional radiology》1986,9(5-6):245-252
Reestablishing myocardial perfusion during evolving myocardial infarction may limit the ultimate extent of infarction if viable
myocardial tissue is present when recanalization of the occluded vessel is achieved. This will result in improved left ventricular
function and decreased mortality. In addition to their therapeutic benefits, recanalization procedures have contributed greatly
to our knowledge of acute myocardial infarction. It has been demonstrated that myocardial infarction most often occurs after
thrombotic occlusion of a coronary artery. This has settled a controversy that has preoccupied cardiologists for decades.
Selective intracoronary administration of fibrinolytic agents is followed by recanalization in approximately 80% of cases.
Therapeutic failures are attributable to occlusion caused by other factors, to inactivation of streptokinase by high antibody
concentrations, and to insufficient concentrations of streptokinase at the thrombus as a results of unfavorable flow conditions.
This study is dedicated to Prof. Dr. Med. Horst Schmutzler on the occasion of his 60th birthday. 相似文献