首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1572篇
  免费   102篇
  国内免费   7篇
耳鼻咽喉   45篇
儿科学   56篇
妇产科学   35篇
基础医学   84篇
口腔科学   173篇
临床医学   93篇
内科学   324篇
皮肤病学   18篇
神经病学   114篇
特种医学   59篇
外科学   485篇
综合类   11篇
预防医学   22篇
眼科学   47篇
药学   52篇
中国医学   1篇
肿瘤学   62篇
  2024年   1篇
  2023年   23篇
  2022年   37篇
  2021年   54篇
  2020年   46篇
  2019年   48篇
  2018年   68篇
  2017年   46篇
  2016年   80篇
  2015年   89篇
  2014年   89篇
  2013年   76篇
  2012年   126篇
  2011年   140篇
  2010年   79篇
  2009年   62篇
  2008年   108篇
  2007年   110篇
  2006年   98篇
  2005年   84篇
  2004年   64篇
  2003年   55篇
  2002年   30篇
  2001年   17篇
  2000年   10篇
  1999年   15篇
  1998年   4篇
  1997年   1篇
  1996年   2篇
  1995年   2篇
  1993年   2篇
  1992年   2篇
  1991年   4篇
  1990年   3篇
  1988年   4篇
  1987年   1篇
  1985年   1篇
排序方式: 共有1681条查询结果,搜索用时 15 毫秒
51.
52.
International Ophthalmology - The purpose of this study was to compare vitamin D (VD) deficiency frequency among patients with pterygium to that of healthy subjects and to investigate the VD...  相似文献   
53.
Intraneural Hemangioma of the digital nerve is rare and so far three cases have been reported in the literature. We present a case of 12- year- old boy with painless soft tissue mass in the right hand and numbness on the radial aspect of the index finger. Magnetic Resonance Imaging showed an isointense subcutaneous lesion without discrete borders in the first web space classically of hemangioma with the radial digital nerve extension. On exploration, the intraneural extension of the hemangioma was confirmed and total resection, microsurgical primary digital nerve repair was done. The patient became better and at 6 months follow up the index finger sensation improved. The patient had no reccurence and he is still under follow up.  相似文献   
54.
The aim of this study was to develop a novel nanosize drug candidate for cancer therapy. For this purpose, (S)-methyl 2-[(7-hydroxy-2-oxo-4-phenyl-2H-chromen-8-yl)methyleneamino]-3-(1H-indol-3-yl)propanoate (ND3) was synthesized by the condensation reaction of 8-formyl-7-hydroxy-4-phenylcoumarin with l -tryptophan methyl ester. Its controlled release formulation was prepared and characterized by different spectroscopic and imaging methods. The cytotoxic effects of ND3 and its controlled release formulation were evaluated against MCF-7 and A549 cancer cell lines, and it was found that both of them have a toxic effect on cancer cells. For drug design and process development, the molecular docking analysis technique helps to clarify the effects of some DNA-targeted anticancer drugs to determine the interaction mechanisms of these drugs on DNA in a shorter time and at a lower cost. By using the molecular docking analysis and DNA binding assays, the interaction between the synthesized compound and DNA was elucidated and non-binding interactions were also determined. To predict the pharmacokinetics, and thereby accelerate drug discovery, the absorption, distribution, metabolism, excretion and toxicity values of the synthesized compound were determined by in silico methods.  相似文献   
55.
56.
The objective of the present study was to determine whether preischemic administration of syringic acid (SA) would attenuate renal ischemia-reperfusion injury (IRI). Rats were divided into three groups: Sham group; IR group; and IR?+?SA group. The effects of SA were examined using biochemical parameters including serum ischemia-modified albumin (IMA), total antioxidant status (TAS), total oxidant status (TOS), oxidative stress index (OSI), tissue superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase (CAT) and malondialdehyde (MDA). The apoptosis status and histopathological changes were evaluated. After calculating the score for each histopathological change, the total score was obtained by summing all the scores. In the SA group, MDA, IMA, TOS, and OSI decreased significantly compared to the IR group. After SA administration, the increase in GPx activity was found to be significant. Apoptosis decreased significantly in the SA group compared with the IR group. The total score significantly decreased after administration of SA. Taken together, our findings suggest that SA preconditioning is effective in reducing tissue damage induced in kidney IRI. Renal histology also showed convincing evidence regarding the protective nature of SA.  相似文献   
57.
58.
59.
Priapism is the prolonged, painful erection of penile tissue not accompanied by sexual arousal. Priapism has been established as a rare adverse drug reaction to drugs such as antipsychotics, psychostimulants, antidepressants, and mood stabilizers. Immediate intervention is needed to prevent destructive and irreversible complications, such as erectile dysfunction, disfigurement, inability of the penis to stay erect, and related social/emotional problems. Antipsychotic‐induced priapism may result from the alpha receptor occupancy property of those drugs. We report the case of a 13‐year‐old suffering from attention deficit–hyperactivity disorder plus conduct disorder with priapism related to antipsychotics. Episodes occurred with risperidone plus methylphenidate, quetiapine plus methylphenidate, and chlorpromazine alone.  相似文献   
60.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号