全文获取类型
收费全文 | 1005篇 |
免费 | 59篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 18篇 |
儿科学 | 33篇 |
妇产科学 | 26篇 |
基础医学 | 63篇 |
口腔科学 | 37篇 |
临床医学 | 91篇 |
内科学 | 268篇 |
皮肤病学 | 76篇 |
神经病学 | 58篇 |
特种医学 | 51篇 |
外科学 | 182篇 |
综合类 | 9篇 |
预防医学 | 21篇 |
眼科学 | 91篇 |
药学 | 13篇 |
肿瘤学 | 29篇 |
出版年
2023年 | 3篇 |
2022年 | 12篇 |
2021年 | 20篇 |
2020年 | 15篇 |
2019年 | 21篇 |
2018年 | 29篇 |
2017年 | 19篇 |
2016年 | 37篇 |
2015年 | 49篇 |
2014年 | 43篇 |
2013年 | 52篇 |
2012年 | 71篇 |
2011年 | 92篇 |
2010年 | 44篇 |
2009年 | 25篇 |
2008年 | 52篇 |
2007年 | 68篇 |
2006年 | 73篇 |
2005年 | 68篇 |
2004年 | 56篇 |
2003年 | 35篇 |
2002年 | 43篇 |
2001年 | 28篇 |
2000年 | 27篇 |
1999年 | 25篇 |
1998年 | 8篇 |
1997年 | 11篇 |
1996年 | 5篇 |
1995年 | 2篇 |
1994年 | 4篇 |
1993年 | 2篇 |
1992年 | 5篇 |
1991年 | 6篇 |
1990年 | 6篇 |
1989年 | 2篇 |
1987年 | 2篇 |
1986年 | 1篇 |
1985年 | 3篇 |
1979年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有1066条查询结果,搜索用时 31 毫秒
1.
U I Esen 《Ultrasound in obstetrics & gynecology》2005,26(2):201; author reply 201-201; author reply 202
2.
Ziya Cetinkaya Kazim Esen Ibrahim Hanefi Ozercan Bilal Ustundag Refik Ayten Erhan Aygen 《World journal of emergency surgery : WJES》2006,1(1):37
Background
Ischemia is the most important factor compromises wound healing in colonic anastomosis. Mesenteric vessels are ligated at first while performing colonic resection and following anastomosis. Therefore blood supply of the related segments of colon temporarily interrupted and ischemia can easily occur. This study was carried out to explore whether Bosentan, an endothelin-receptor antagonist, can eliminate vasoconstruction, increase blood flow in the splanchnic area and anastomotic region and therefore possibly facilitate wound healing and prevent intra-abdominal adhesion formation. 相似文献3.
4.
5.
Joachim Ktz Mathias Hahn Burkart Philipp Esen A. Bekturov Sarkyt E. Kudaibergenov 《Macromolecular chemistry and physics.》1993,194(2):397-410
Employing polyampholytes (inclusively polybetaines) of different chemical structure containing carboxylic groups and various basic nitrogen functions, homosymplex formation, as well as the competition between homo- and heterosymplex formation on addition of an appropriate polyelectrolyte, was investigated in dependence of pH and ionic strength by means of viscometry and turbidimetry. With most, but not with all, of the polyampholytes, the expected viscosity minimum at the isoelectric point, with its steepness depending on polyampholyte structure, was observed. Competition of homo- and heterosymplex formation at and near the isoelectric point is mainly governed by the pK values of the species involved, the level of zwitter-ion formation of the polyampholyte and the effect of non-Coulombic interactions, for example, via hydrogen bonds. 相似文献
6.
We have developed a rat atrial mince preparation that can take up choline, acetylate it, and then release acetylcholine in a depolarization-dependent manner. We demonstrate that aging appears to reduce the functional cholinergic activity in this tissue, which may be important for understanding how senescence alters the regulation of cardiac activity. 相似文献
7.
Mert Kilic Bilgen Coskun Metin Vural Ahmet Musaoglu Tarik Esen Mevlana Derya Balbay 《Andrologia》2021,53(5):e14041
In this study, we evaluated the role of the Prostate Imaging–Reporting and Data System (PI-RADS) classification of multiparametric magnetic resonance imaging (mpMRI) to determine the likelihood of prostate cancer (PCa) in patients with haemospermia. Fifty-one patients presenting with haemospermia between 2018 and 2020 were included in this retrospective study. Forty-two of the patients (82.4%) were over 40 years, and the median prostate-specific antigen (PSA) level was 1.4 ng/ml. Fourteen of the patients (27.5%) had recurrent haemospermia. All patients underwent mpMRI, and assessments were classified according to PI-RADS v2. The mpMRI revealed PI-RADS one to four lesions in 10 (19.6%), 30 (58.8%), 6 (11.8%) and 5 (9.8%) patients respectively. One patient with PI-RADS 3 and five with PI-RADS 4 lesions underwent cognitive fusion prostate biopsy depending on MRI findings, and two patients with PI-RADS 4 lesions were diagnosed with PCa. Patients with haemospermia and risk factors, that is aged over 40 years, a high PSA level or familial history of PCa, need a more thorough evaluation with mpMRI. 相似文献
8.
Intracranial subdural haematoma is a rare complication of spinal anaesthesia. This report describes the case of a 31-year-old woman who presented with post partum headache following spinal anaesthesia for caesarean section. Bilateral haematomata were evacuated via burr-holes performed under total intravenous anaesthesia and the patient made a complete and uneventful recovery. The recognized causes of subdural haematoma are discussed. 相似文献
9.
10.