全文获取类型
收费全文 | 4430篇 |
免费 | 281篇 |
国内免费 | 28篇 |
专业分类
耳鼻咽喉 | 54篇 |
儿科学 | 140篇 |
妇产科学 | 175篇 |
基础医学 | 495篇 |
口腔科学 | 91篇 |
临床医学 | 323篇 |
内科学 | 853篇 |
皮肤病学 | 110篇 |
神经病学 | 313篇 |
特种医学 | 133篇 |
外国民族医学 | 2篇 |
外科学 | 696篇 |
综合类 | 199篇 |
一般理论 | 2篇 |
预防医学 | 273篇 |
眼科学 | 119篇 |
药学 | 508篇 |
中国医学 | 36篇 |
肿瘤学 | 217篇 |
出版年
2023年 | 37篇 |
2022年 | 30篇 |
2021年 | 143篇 |
2020年 | 91篇 |
2019年 | 167篇 |
2018年 | 194篇 |
2017年 | 140篇 |
2016年 | 108篇 |
2015年 | 111篇 |
2014年 | 196篇 |
2013年 | 226篇 |
2012年 | 332篇 |
2011年 | 337篇 |
2010年 | 199篇 |
2009年 | 147篇 |
2008年 | 239篇 |
2007年 | 249篇 |
2006年 | 213篇 |
2005年 | 208篇 |
2004年 | 161篇 |
2003年 | 161篇 |
2002年 | 122篇 |
2001年 | 56篇 |
2000年 | 64篇 |
1999年 | 69篇 |
1998年 | 31篇 |
1997年 | 23篇 |
1996年 | 26篇 |
1995年 | 20篇 |
1994年 | 23篇 |
1993年 | 16篇 |
1992年 | 44篇 |
1991年 | 44篇 |
1990年 | 52篇 |
1989年 | 38篇 |
1988年 | 32篇 |
1987年 | 18篇 |
1986年 | 27篇 |
1985年 | 28篇 |
1984年 | 21篇 |
1982年 | 16篇 |
1981年 | 18篇 |
1980年 | 14篇 |
1979年 | 29篇 |
1978年 | 16篇 |
1976年 | 26篇 |
1975年 | 15篇 |
1974年 | 24篇 |
1973年 | 19篇 |
1971年 | 17篇 |
排序方式: 共有4739条查询结果,搜索用时 93 毫秒
1.
- The use of percutaneous mechanical support devices is becoming more embedded within the therapeutic armamentarium for patients presenting with decompensated heart failure, cardiogenic shock, and patients undergoing high risk PCI.
- The Aortix device offers a new approach to percutaneous support that appears to be safe to implement and overcomes some of the drawbacks of the extant devices.
- Further investigation remains warranted to evaluate its ultimate utility and place among the approach to the patient in need of circulatory support.
2.
Arti Nanda Hanan Al‐Abboh Akmal Zahra Humoud Al‐Sabah Arun Gupta Adekunle D. Adekile 《Pediatric dermatology》2019,36(2):258-259
Neutrophilic panniculitis (NP) with myelodysplasia has been described in adults but not in children. We report a case of NP associated with myelodysplasia in a child with MYSM1 deficiency, a newly described syndrome with primary immunodeficiency (PI), bone marrow failure, and developmental aberrations. 相似文献
3.
4.
Sebastian P. Mondaca MD Dazhi Liu PharmD BCOP Jessica R. Flynn Sandy Badson Stefan Hamaway BS Mrinal M. Gounder MD Danny N. Khalil MD PhD Alexander E. Drilon MD Bob T. Li MD MPH Komal L. Jhaveri MD Alison M. Schram MD Katherine E. Kargus RN Mary Kate Kasler DNP MSN Natalie M. Blauvelt Neil H. Segal MD PhD Marinela Capanu PhD Margaret K. Callahan MD PhD David M. Hyman MD Maya Gambarin-Gelwan MD James J. Harding MD 《Cancer》2020,126(22):4967-4974
5.
6.
Shwikar AbdelSalam Ahmed Azza Mahmoud Elhefnawy Hanan Galal Azouz Yara Safwat Roshdy Mona Hamdy Ashry Ahmed Elsayed Ibrahim Marwa Ahmed Meheissen 《Journal of molecular neuroscience : MN》2020,70(6):887-896
The role of gut microbiome was recently raised in the pathogenesis of neurodevelopmental disorders including autism spectrum disorder (ASD). The aim of this study was to elucidate changes in gut microbiome in Egyptian autistic children and its possible correlation with the severity of autism and gastrointestinal (GI) symptoms. The gut bacterial microbiome of 41 ASD children, 45 siblings, and 45 healthy controls were analyzed using quantitative SYBR Green real-time PCR technique targeting 16S rRNA of selected bacteria. The gut microbiome of ASD children and their siblings contained a higher relative abundance of Bacteroides as well as Ruminococcus than controls. Prevotella/Bacteroides (P/B) ratio and Firmicutes/Bacteroidetes (F/B) were significantly lower in both ASD cases and their siblings. The only difference between the autistic cases and their siblings was the significantly higher level of Bifidobacterium in siblings, which appears to offer them a protective role. There was no correlation between the altered gut microbiome and the severity of autism or GI symptoms. The current study showed an evidence of changes in the gut microbiome of autistic children compared to the unrelated control. However, the microbiome profile of siblings was more like that of autistic children than that of unrelated controls indicating that gut microbiota is affected by dietary habits, living conditions together with host genetic factors. 相似文献
7.
Ignazio Condello PhD Marco Moscarelli MD Giuseppe Santarpino MD Khalil Fattouch MD Giuseppe Nasso MD Giuseppe Speziale MD 《Journal of cardiac surgery》2020,35(8):2039-2040
Condensation and water loss from gas output of the cardiopulmonary bypass (CPB) oxygenator has been the study object of several research. However, little is known about the propagation of the condensation formed at the level of oxygenator and how potentially it can contaminate the surrounding environment. We aimed to document the moment of formation of the ‘gas steam’ derived from the CPB oxygenator during cardiac surgery with thermography imaging. Thermographic camera is a device that creates an image using infrared radiation, similar to a common camera that forms an image using visible light. The brightest (warmest) parts of the image are customarily colored white, the intermediate temperatures reds and yellows, and the dimmest (coolest) parts black. Thermal image captures the condensation phenomenon around the oxygenator perimeter with the same color/temperature code (yellow) of gas outlet. The use of aspiration at the level of the gas outlet could also favor the elimination of the condensation, improve gas exchanges, and potentially reduce the spread of hazardous substances in the operating room. 相似文献
8.
9.
10.
Rebecca Wright Caleb Ferguson Mustafa Bodrick Hanan Balkhy Debra Jackson Patricia M. Davidson 《Journal of clinical nursing》2020,29(13-14):2723-2729