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   2341篇
  免费   136篇
  国内免费   20篇
耳鼻咽喉   30篇
儿科学   35篇
妇产科学   82篇
基础医学   184篇
口腔科学   74篇
临床医学   203篇
内科学   671篇
皮肤病学   30篇
神经病学   274篇
特种医学   87篇
外科学   354篇
综合类   7篇
预防医学   72篇
眼科学   100篇
药学   126篇
肿瘤学   168篇
  2024年   7篇
  2023年   46篇
  2022年   80篇
  2021年   128篇
  2020年   64篇
  2019年   85篇
  2018年   102篇
  2017年   75篇
  2016年   80篇
  2015年   84篇
  2014年   107篇
  2013年   134篇
  2012年   199篇
  2011年   187篇
  2010年   95篇
  2009年   107篇
  2008年   139篇
  2007年   109篇
  2006年   124篇
  2005年   103篇
  2004年   97篇
  2003年   82篇
  2002年   84篇
  2001年   9篇
  2000年   8篇
  1999年   16篇
  1998年   7篇
  1997年   13篇
  1996年   7篇
  1995年   15篇
  1994年   10篇
  1993年   4篇
  1992年   10篇
  1991年   3篇
  1989年   4篇
  1988年   8篇
  1987年   5篇
  1986年   9篇
  1985年   6篇
  1984年   11篇
  1983年   3篇
  1982年   6篇
  1981年   2篇
  1980年   2篇
  1979年   2篇
  1978年   3篇
  1976年   6篇
  1975年   2篇
  1974年   2篇
  1973年   2篇
排序方式: 共有2497条查询结果,搜索用时 15 毫秒
71.
Neurological Sciences - Cognitive screening tests (CSTs) are crucial to neuropsychological diagnostics, and thus need to be featured by robust psychometric and diagnostic properties. However, CSTs...  相似文献   
72.
Neurological Sciences - The novel human coronavirus (SARS-CoV-2) shows neurotropism and systemically affects the central nervous system (CNS). Cognitive deficits have been indeed reported as both...  相似文献   
73.
Neurological Sciences - Episodic long-term memory (LTM) difficulties/deficits are frequent in COVID-19-recovered patients and negatively impact on prognosis and outcome. However, little is known...  相似文献   
74.
75.
76.
Graefe's Archive for Clinical and Experimental Ophthalmology - To describe and compare the conjunctival filtering bleb features after XEN gel implantation and trabeculectomy using anterior...  相似文献   
77.
78.
Opioids and renal function.   总被引:2,自引:0,他引:2  
Opioids, both endogenous and exogenous, have a strong influence on the renal function through different mechanisms, producing changes in the renal excretion of water and sodium. Several studies have demonstrated that opioids influence renal function, according to the agonist profile used. Mu, kappa, and delta agonists produce different renal effects, although the mechanisms remain unclear. Experimental data have given the input for a possible therapeutic role of kappa agonists for some specific conditions, for example, in treating water retention or hyponatremia occurring in patients who have hepatic cirrhosis with ascites. On the other hand, changes in renal function might strongly condition the use of opioids in the clinical setting, and the knowledge of the relationship between opioids and renal function is mandatory for a tailored approach to accommodate the individual responses in terms of pain intensity, tolerance, and adverse effects experienced by these groups of patients. The influence of renal function when using different opioids in the clinical setting is reviewed, as well as problems related to transplantation, renal damage induced by opioid addiction, and problems related to the use of opioid antagonists in such conditions. PERSPECTIVE: Endogenous opioids exert physiologic effects on renal function, and the use of opioids may have an influence on renal activity. Renal impairment has a serious impact on the clearance of most opioids used in the clinical setting. Biochemical and clinical monitoring is mandatory to prevent serious complications.  相似文献   
79.
Stem cells have huge applications in the field of tissue engineering and regenerative medicine. Their use is currently not restricted to the life-threatening diseases but also extended to disorders involving the structural tissues, which may not jeopardize the patients’ life, but certainly influence their quality of life. In fact, a particularly popular line of research is represented by the regeneration of bone and cartilage tissues to treat various orthopaedic disorders. Most of these pioneering research lines that aim to create new treatments for diseases that currently have limited therapies are still in the bench of the researchers. However, in recent years, several clinical trials have been started with satisfactory and encouraging results. This article aims to review the concept of stem cells and their characterization in terms of site of residence, differentiation potential and therapeutic prospective. In fact, while only the bone marrow was initially considered as a “reservoir” of this cell population, later, adipose tissue and muscle tissue have provided a considerable amount of cells available for multiple differentiation. In reality, recently, the so-called “stem cell niche” was identified as the perivascular space, recognizing these cells as almost ubiquitous. In the field of bone and joint diseases, their potential to differentiate into multiple cell lines makes their application ideally immediate through three main modalities: (1) cells selected by withdrawal from bone marrow, subsequent culture in the laboratory, and ultimately transplant at the site of injury; (2) bone marrow aspirate, concentrated and directly implanted into the injury site; (3) systemic mobilization of stem cells and other bone marrow precursors by the use of growth factors. The use of this cell population in joint and bone disease will be addressed and discussed, analysing both the clinical outcomes but also the basic research background, which has justified their use for the treatment of bone, cartilage and meniscus tissues.  相似文献   
80.
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