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   809篇
  免费   26篇
  国内免费   12篇
耳鼻咽喉   25篇
儿科学   27篇
妇产科学   25篇
基础医学   52篇
口腔科学   36篇
临床医学   74篇
内科学   209篇
皮肤病学   18篇
神经病学   36篇
特种医学   13篇
外科学   223篇
综合类   11篇
预防医学   22篇
眼科学   35篇
药学   23篇
中国医学   2篇
肿瘤学   16篇
  2023年   9篇
  2022年   16篇
  2021年   30篇
  2020年   16篇
  2019年   23篇
  2018年   16篇
  2017年   18篇
  2016年   21篇
  2015年   27篇
  2014年   24篇
  2013年   50篇
  2012年   46篇
  2011年   36篇
  2010年   28篇
  2009年   35篇
  2008年   66篇
  2007年   81篇
  2006年   77篇
  2005年   76篇
  2004年   55篇
  2003年   38篇
  2002年   18篇
  2001年   10篇
  2000年   11篇
  1999年   7篇
  1998年   2篇
  1996年   2篇
  1995年   2篇
  1994年   2篇
  1992年   1篇
  1991年   1篇
  1990年   3篇
排序方式: 共有847条查询结果,搜索用时 15 毫秒
1.
Oxygen-derived free radicals have been implicated in the pathogenesis of tissue injury after ischaemia-reperfusion. Caffeic acid phenethyl ester (CAPE), an active ingredient of honeybee propolis, has been identified as having potent antioxidant and anti-inflammatory properties. We evaluated the ability of CAPE applied intraperitoneally in reducing tissue injury after ischaemia-reperfusion. To investigate whether treatment with CAPE modifies the concentrations of the endogenous indices of oxidant stress, we examined its effects on a model of flap ischaemia-reperfusion injury in rats. CAPE (10 micromol/kg) was given through the peritoneum before reperfusion. CAPE given intraperitoneally had an inhibitory effect on tissue injury after ischaemia-reperfusion comparable to that of a control group. The anti-inflammatory and antioxidant properties of CAPE may contribute to its suppression of tissue injury.  相似文献   
2.
Dydrogesterone, similar to women's natural progesterone, has been used in a wide range of gynecological conditions. Despite its widespread use, dydrogesterone-induced hepatotoxicity and dydrogesterone-induced hemolytic anemia have, to the best of our knowledge, never been reported previously. We describe a case of hepatitis and warm antibody hemolytic anemia due to dydrogesterone.  相似文献   
3.
A family with cardiac malformation, cleft lip-palate, short stature, microcephaly, distally placed thumbs, short 2nd and 5th fingers, long and broad 1st toes, broad distance between 1st and 2nd toes and mediodorsal curvature of the 4th toes with syndactyly of the 2nd and 3rd toes has been described as having a new syndrome. While some members of the family had full signs of the syndrome, others had similar but fewer and less severe anomalies of the same structures. The presence of common findings in three generations, its variable expressivity and pleiotropism, and the non-consanguineous history in the parents suggest that the inheritance is autosomal dominant.  相似文献   
4.
BACKGROUND: Patients with allergic rhinitis and bronchial hyperresponsiveness (BHR) may be at higher risk of developing asthma. OBJECTIVE: To investigate whether reactivity to aeroallergens in skin prick testing (SPT) and serum eosinophil cationic protein levels can be used to predict BHR in allergic rhinitis patients. METHODS: Fifty-nine consecutive patients with allergic rhinitis underwent SPTs using grass, tree, weed, parietaria, Alternaria, Aspergillus, mites, and cat and dog dander extracts. Methacholine challenge tests were performed using spirometry. RESULTS: Methacholine-induced BHR was detected in 23 patients (39%). Of 59 patients, 14 had 1 positive SPT response, 35 had 2 to 4 positive responses, and 10 had more than 4 positive responses. There was a significant inverse correlation between methacholine provocation concentration that caused a decrease in forced expiratory volume in 1 second of 20% (PC20) and the number of positive SPT responses (r = -0.28; P = .03). The BHR-positive patients had a mean of 4 positive SPT responses, whereas BHR-negative patients had a mean of 2.6 (P = .04). Nine BHR-positive patients (39%) and only 1 BHR-negative patient (3%) had more than 4 positive SPT responses (P < .001). There was no correlation between serum eosinophil cationic protein levels and methacholine PC20 doses. There was a strong association between hyperresponsiveness to methacholine and both cat and dog dander sensitivity (P < .001 and P = .001, respectively). CONCLUSIONS: Allergic rhinitis patients with SPT responses to a higher number of allergens are more likely to have BHR. Whether the number of positive SPT responses correlates with the risk of developing asthma in allergic rhinitis patients remains to be determined.  相似文献   
5.
BackgroundTo perform the citation and content analysis of 100 articles on Hallux valgus from the most cited to the least.Materials and methodsArticles published on Hallux valgus between 1980 and 2020 were analyzed by making use of the Web of Science database. Articles were ranked from most cited to the least. Content analysis of all articles was also carried out. Original research articles, reviews, and clinical trials were included in the study whereas case reports were excluded from the study.ResultsThe total number of citations of the 100 most-cited articles was 7,697. The most-cited article was ‘Prevalence of hallux valgus in the general population; systematic review and meta-analysis’ published by Sheere Nix in Journal of Foot and Ankle Research in 2010. The country where the articles were mostly produced was USA (n = 46). The most interesting issue was the osteotomy techniques and changes in Hallux valgus surgery.ConclusionThe treatment of the Hallux valgus disease is still discussed today. Citation analyses have shown that surgical developments related to HV surgery still attract attention, and this information will be updated continuously in line with the increasing number of articles.  相似文献   
6.
Chondrosarcoma is a rare tumor. In this study, we present a case with laryngeal chondrosarcoma that was treated by an endolaryngeal approach using an operation microscope. The patient remains disease-free to date, with no evidence of new or recurrent disease more than 3 years after the endolaryngeal surgery. The computerized tomography and endoscopic examinations did not reveal any recurrent disease, indicating the success of the endolaryngeal approach.  相似文献   
7.
8.
9.
Clinical Rheumatology - Multi-system inflammatory syndrome in children (MIS-C) is a less understood and a rare complication of coronavirus disease-2019 (COVID-19). Given the scarce data regarding...  相似文献   
10.
Uzuner  Selcuk  Durcan  Gizem  Sahin  Sezgin  Bahali  Kayhan  Barut  Kenan  Kilicoglu  Ali Guven  Adrovic  Amra  Bilgic  Ayhan  Kasapcopur  Ozgur 《Clinical rheumatology》2021,40(12):5025-5032
Clinical Rheumatology - Having a child with a chronic illness is a source of stress for the whole family, especially the primary caregiver. The aim of this study was to evaluate the associations...  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