全文获取类型
收费全文 | 4576篇 |
免费 | 192篇 |
国内免费 | 17篇 |
专业分类
耳鼻咽喉 | 16篇 |
儿科学 | 324篇 |
妇产科学 | 71篇 |
基础医学 | 527篇 |
口腔科学 | 154篇 |
临床医学 | 289篇 |
内科学 | 725篇 |
皮肤病学 | 83篇 |
神经病学 | 226篇 |
特种医学 | 196篇 |
外科学 | 608篇 |
综合类 | 351篇 |
一般理论 | 2篇 |
预防医学 | 239篇 |
眼科学 | 121篇 |
药学 | 576篇 |
中国医学 | 18篇 |
肿瘤学 | 259篇 |
出版年
2023年 | 13篇 |
2022年 | 56篇 |
2021年 | 103篇 |
2020年 | 58篇 |
2019年 | 68篇 |
2018年 | 89篇 |
2017年 | 70篇 |
2016年 | 72篇 |
2015年 | 113篇 |
2014年 | 161篇 |
2013年 | 183篇 |
2012年 | 266篇 |
2011年 | 276篇 |
2010年 | 188篇 |
2009年 | 178篇 |
2008年 | 239篇 |
2007年 | 260篇 |
2006年 | 224篇 |
2005年 | 212篇 |
2004年 | 198篇 |
2003年 | 155篇 |
2002年 | 145篇 |
2001年 | 127篇 |
2000年 | 117篇 |
1999年 | 110篇 |
1998年 | 71篇 |
1997年 | 81篇 |
1996年 | 73篇 |
1995年 | 47篇 |
1994年 | 41篇 |
1993年 | 24篇 |
1992年 | 75篇 |
1991年 | 61篇 |
1990年 | 65篇 |
1989年 | 59篇 |
1988年 | 62篇 |
1987年 | 49篇 |
1986年 | 63篇 |
1985年 | 45篇 |
1984年 | 38篇 |
1983年 | 26篇 |
1982年 | 16篇 |
1981年 | 19篇 |
1979年 | 16篇 |
1978年 | 12篇 |
1977年 | 20篇 |
1976年 | 13篇 |
1974年 | 17篇 |
1973年 | 19篇 |
1972年 | 15篇 |
排序方式: 共有4785条查询结果,搜索用时 31 毫秒
1.
SK Raina 《Journal of postgraduate medicine》2015,61(3):213-Sep;61(3):213
2.
Suraj Kumar Kulkarni Nagaraja Moorthy Rangaraj Ramalingam 《Echocardiography (Mount Kisco, N.Y.)》2019,36(3):598-601
Antiphospholipid antibody syndrome (APLS) is a rare disorder characterized by a hypercoagulable state. Manifestations include arterial or venous thrombosis, recurrent fetal wastage, coronary artery disease, valvular heart disease, dilated cardiomyopathy, pulmonary artery hypertension, and intracardiac thrombus. Most commonly mitral valve is affected followed by aortic and then tricuspid valve. In this report, a rare case of spontaneous aortic thrombosis with tricuspid stenosis uncomplicated by other valve lesions is presented with clinical and echocardiographic studies and computed tomographic images. 相似文献
3.
4.
5.
Sonoelasticity imaging of prostate cancer: in vitro results 总被引:2,自引:0,他引:2
6.
7.
Guntur E Luis Chee-Khuen Yong Deepak A Singh S Sengupta David SK Choon 《Journal of orthopaedic surgery and research》2007,2(1):22-10
Background
Acromioclavicular injuries are common in sports medicine. Surgical intervention is generally advocated for chronic instability of Rockwood grade III and more severe injuries. Various methods of coracoclavicular ligament reconstruction and augmentation have been described. The objective of this study is to compare the biomechanical properties of a novel palmaris-longus tendon reconstruction with those of the native AC+CC ligaments, the modified Weaver-Dunn reconstruction, the ACJ capsuloligamentous complex repair, screw and clavicle hook plate augmentation. 相似文献8.
Brain cyclooxygenases (COX), the rate-limiting enzyme in prostaglandin synthesis, is rapidly and transiently induced by convulsions in hippocampal and cortical neurons. Previous studies have explored the protective effect of naproxen (non-selective COX-inhibitor) or rofecoxib (selective COX-2 inhibitor) against chemical kindling in mice. With this background, the present study was designed to explore the possible effect of nimesulide (a preferential COX-2 inhibitor) against pentylenetetrazol (PTZ)-induced kindling epilepsy in mice. To induce kindling, PTZ was injected in a subconvulsive dose (40 mg/kg, i.p.) every other day for 15 days. Nimesulide (2.5 or 5 mg/kg, p.o.) was administered each day 45 min before either PTZ or vehicle challenge. The intensity of kindling was assessed immediately after PTZ administration according to a prevalidated scoring scale. On 16th day i.e. 24 h after the last dose of PTZ, animals were sacrificed and various biochemical parameters were assessed in the whole brain. Compared with normal control group, PTZ-kindled mice had significantly higher levels of malondialdehyde, nitrite, myeloperoxidase but had lower levels of reduced glutathione in the whole brain homogenate. Chronic treatment with nimesulide (2.5 or 5 mg/kg, p.o.) for 15 days showed significant decrease in kindling score and could play a role in controlling the accompanying biochemical alterations due to PTZ. These results suggested that nimesulide, a preferential COX-2 inhibitor offered neuroprotection against PTZ-induced kindling in mice. 相似文献
9.
10.