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   783篇
  免费   26篇
  国内免费   3篇
耳鼻咽喉   14篇
儿科学   46篇
妇产科学   15篇
基础医学   58篇
口腔科学   22篇
临床医学   45篇
内科学   196篇
皮肤病学   19篇
神经病学   21篇
特种医学   11篇
外科学   64篇
综合类   114篇
一般理论   2篇
预防医学   49篇
眼科学   35篇
药学   36篇
中国医学   1篇
肿瘤学   64篇
  2023年   2篇
  2022年   9篇
  2021年   21篇
  2020年   10篇
  2019年   6篇
  2018年   12篇
  2017年   15篇
  2016年   17篇
  2015年   8篇
  2014年   30篇
  2013年   22篇
  2012年   55篇
  2011年   45篇
  2010年   48篇
  2009年   48篇
  2008年   52篇
  2007年   47篇
  2006年   43篇
  2005年   18篇
  2004年   25篇
  2003年   17篇
  2002年   21篇
  2001年   13篇
  2000年   10篇
  1999年   11篇
  1998年   19篇
  1997年   11篇
  1996年   10篇
  1995年   2篇
  1994年   11篇
  1993年   9篇
  1992年   3篇
  1991年   9篇
  1990年   7篇
  1989年   4篇
  1988年   8篇
  1987年   7篇
  1986年   6篇
  1985年   6篇
  1984年   6篇
  1983年   2篇
  1981年   4篇
  1980年   5篇
  1979年   13篇
  1978年   8篇
  1977年   8篇
  1976年   14篇
  1975年   13篇
  1974年   12篇
  1973年   10篇
排序方式: 共有812条查询结果,搜索用时 0 毫秒
21.
22.
During embryogenesis, defective movement of thyroid tissue from the floor of the primitive foregut to the pre-tracheal region leads to ectopic thyroid, most commonly found around the course of the thyroglossal duct or sometimes laterally in the neck. Very rarely, ectopic thyroid at distant sites, e.g., in the thorax (mediastinal, lung, heart) or in the abdomen (ovary, adrenal, duodenal, pancreas, and intestine) are reported. Thyroid function in all these cases has been reported to vary from euthyroid, hypothyroid to hyperthyroid. We are here presenting a rare case of ectopic thyroid in the heart (Struma cordis), within the right ventricular cavity attached to the interventricular septum at the right ventricular outflow tract (RVOT), i.e., on the tricuspid valve and adjacent intraventricular septum in a male subject (male to female ratio as M/F 1:6). This case is worth reporting because of the rarity regarding the location, male sex, and the involvement of the tricuspid valve.  相似文献   
23.
In our effort to identify the effective gastric sparing and protective anti-inflammatory agents, a series of cycloalkyl/aryl-3,4,5-trimethylgallates were synthesized and characterized. The physicochemical properties were studied to assess the lipophilicity and chemical stability. Subsequently, the compounds were evaluated for their anti-inflammatory activity and effect on gastric mucosa by most active compounds. All the compounds exhibited promising anti-inflammatory activity. In particular, 4a, 4b, 4g, and 4h emerged as the most active compounds in the series. The results of gastric mucosal studies and biochemical estimations suggested that these compounds are non-ulcerogenic and gastroprotective. The molecular docking analysis was performed to understand the binding interactions of these compounds to cyclooxygenase isoenzyme (COX-1 and COX-2). The results from this investigation suggests cycloalkyl/aryl-3,4,5-trimethylgallates as potent safer gastrosparing and protective anti-inflammatory agents.  相似文献   
24.
We report a case of disseminated meningospondylodiscitis in an elderly diabetic patient caused by Fusarium oxysporum. As the clinical presentation was nonspecific, the diagnosis of the condition could only be arrived at after laboratory and imaging studies. The diagnosis of the condition requires a high index of suspicion. Patient underwent thorough surgical debridement along with a short course of variconazole and remained asymptomatic after 36 months of diagnosis. Fusarium is a large genus of filamentous fungi widely distributed in soil and in association with plants. It is known to cause local infections (nail, cornea) in healthy humans and disseminated infection only in the immunocompromised.  相似文献   
25.
26.
Synovial chondromatosis is cartilaginous metaplasia of mesenchymal remnants of synovial tissue of the joints. Its main characteristic is the formation of cartilaginous nodules in the synovium and inside the articular space (loose bodies). It usually presents between the third and fifth decades and is rare in children. It presents as a mono-articular pathology affecting large joints such as the knee, hip, and elbow. The main symptoms are pain, swelling, and limitation of movements in the affected joint. Diagnosis is made by panoramic radiographs, computed tomography scan, and mainly magnetic resonance imaging and on surgery. The authors describe of synovial chondromatosis presenting in the elbow of an 11 year-old girl which is unreported to the best of our knowledge.  相似文献   
27.
A case of saccular aneurysm of the internal carotid artery presenting as a parapharyngeal mass is being reported because of its rarity and the paucity of literature on the subject. Welling et al. (1983) evaluated 1118 aneurysms of the peripheral arteries seen over a 30-year period. Forty-one of these arose from the extracranial carotid system, only four of them being saccular aneurysms of the internal carotid artery. None of them presented with a parapharyngeal mass.  相似文献   
28.
29.
A 13 yr old boy presented with generalised tonic-clonic convulsions and papilledema simulating an intracranial space occupying lesion. CT scan showed bilateral basal ganglia calcification. Biochemical investigations established the diagnosis of hypoparathyroidism. On treatment with oral calcium and vitamin D the patients became seizure free and papilledema regressed. The possibility of hypoparathyroidism should be considered when basal ganglia calcification is seen and CT scan.  相似文献   
30.
Supplementation of wheat flour with soy flour (full fat and defatted) at 5, 10, 15 and 20% levels was carried out to test the effect on physico-chemical, sensory, nutritional evaluation and shelf life of breads. Adding 10% of soy flour (full fat and defatted) produced breads with good baking and organoleptic characteristics. However, at 15 and 20% levels they were less acceptable. The better breads were further investigated for various nutritional parameters and shelf life. Full fat and defatted soy flour (10%) supplemented bread exhibited 13.66 and 13.81% protein, and 3.02 and 3.05 g/100 g protein total lysine contents as compared to control (wheat) bread (11.47% protein and 2.36 g/100 g protein total lysine). Other nutrients are also increased in supplemented breads as compared to wheat bread. However, for storage, defatted soy supplemented bread exhibited better shelf life than the full fat version.  相似文献   
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