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   404篇
  免费   31篇
  国内免费   6篇
耳鼻咽喉   1篇
儿科学   50篇
妇产科学   4篇
基础医学   44篇
口腔科学   8篇
临床医学   24篇
内科学   72篇
皮肤病学   7篇
神经病学   7篇
特种医学   58篇
外科学   34篇
综合类   81篇
预防医学   18篇
眼科学   6篇
药学   14篇
中国医学   1篇
肿瘤学   12篇
  2023年   1篇
  2021年   1篇
  2020年   1篇
  2019年   5篇
  2018年   6篇
  2017年   3篇
  2016年   3篇
  2015年   11篇
  2014年   17篇
  2013年   13篇
  2012年   8篇
  2011年   13篇
  2010年   20篇
  2009年   29篇
  2008年   16篇
  2007年   18篇
  2006年   12篇
  2005年   9篇
  2004年   10篇
  2003年   11篇
  2002年   4篇
  2001年   8篇
  2000年   7篇
  1999年   18篇
  1998年   36篇
  1997年   19篇
  1996年   24篇
  1995年   11篇
  1994年   21篇
  1993年   14篇
  1992年   3篇
  1991年   5篇
  1990年   3篇
  1989年   5篇
  1988年   7篇
  1987年   1篇
  1986年   3篇
  1985年   7篇
  1984年   6篇
  1983年   2篇
  1982年   3篇
  1981年   2篇
  1980年   7篇
  1978年   4篇
  1977年   5篇
  1976年   6篇
  1975年   3篇
排序方式: 共有441条查询结果,搜索用时 171 毫秒
101.
102.
103.
Introduction: The incidence of maxillofacial injuries is on the rise due to motor vehicle accidents and increased incidence of violence in recent times. The aim of this retrospective study was to determine the incidence, aetiology, the pattern of fractures, their management with open reduction and internal fixation (ORIF) and complications, if any.  相似文献   
104.
105.
Priority setting is about making decisions. Key issues faced during priority setting processes include identifying who makes these decisions, who sets the criteria, and who benefits. The paper reviews the literature and history around priority setting in research, particularly in Aboriginal health research. We explore these issues through a case study of the Cooperative Research Centre for Aboriginal Health (CRCAH)'s experience in setting and meeting priorities.  相似文献   
106.

Background

Posterior capsular opacification is the most common complication of modern cataract surgery.

Methods

A prospective study was conducted on 150 patients (150 eyes) out of which 50 eyes each underwent cataract surgery by extracapsular cataract extraction, small incision cataract surgery and phacoemulsification technique. On postoperative follow up posterior capsular opacification and Neodymium: Yttrium Aluminium Garnet laser capsulotomy rate was evaluated.

Result

Posterior capsular opacification rate was significantly less (p=0.03) in eyes which had undergone phacoemulsification as compared to extracapsular cataract extraction. However capsulotomy rate was not statistically significant after comparison of the three surgical techniques of cataract surgery.

Conclusion

Posterior capsular opacification following cataract surgery can be minimized by the use of small incision cataract surgery and phacoemulsification.Key Words: Posterior capsular opacification, Capsulorrhexis, Hydrodissection  相似文献   
107.
Background : In plateletpheresis blood is withdrawn from a donor in anticoagulant solution and separated into components. Platelets are retained and the remaining components are returned to the individual.  相似文献   
108.

Background

In plateletpheresis blood is withdrawn from a donor in anticoagulant solution and separated into components. Platelets are retained and the remaining components are returned to the individual.

Methods

The present study was aimed to compare the platelet yield and collection efficiency of Baxter CS 3000 plus and Haemonetics MCS plus cell separators and to study adverse donor reactions. Donors were selected as per the set criteria for single donor platelet (SDP) preparation. Donors'' samples for pre donation and post donation platelet count were collected in EDTA and for product counts in the sample pouch attached with apheresis kits. The results were obtained by haematology analyzer. Platelet yield and collection efficiency were calculated.

Result

Results were tabulated for both the cell separators and analyzed. Platelet yield was marginally better with Baxter CS 3000 plus but collection efficiency was better with the Haemonetics MCS plus. Residual white cells were more in single donor platelet concentrate preparation by MCS plus. Adverse donor reactions were similar with both cell separators, in form of mild citrate toxicity and mild to moderate pain at phlebotomy site.

Conclusion

Findings of the present study along with other factors such as less priming time for kit, portability of cell separator, better patient comfort owing to single arm venous access and lesser cost suggest that Haemonetics MCS plus is a better choice as compared to Baxter CS 3000 plus cell separator.Key Words: Plateletpheresis, Single donor platelet (SDP)  相似文献   
109.
青海省达日县棘球蚴病流行病学调查   总被引:2,自引:0,他引:2       下载免费PDF全文
目的 分析青海省果洛藏族自治州达日县棘球蚴病的流行分布现状,为制定预防控制措施提供科学依据。 方法 于2007年8~9月对达日县6个乡各2~3个自然村的3周岁以上常驻牧民分别用B超、间接红细胞凝集试验(IHA)和间接ELISA法(重组Ag B和Em 18抗原)检查两型棘球蚴病患病和感染情况。并调查当地啮齿类动物、牦牛、绵羊和野犬的感染情况,对采集的棘球绦虫和棘球蚴用PCR-RFLP方法进行虫种鉴定,并确定其基因型。收集牧民的家犬粪便,用双抗体夹心法检测粪抗原阳性率。 结果 共调查牧民1 723人,B超查出棘球蚴病患者236例(占13.7%),其中囊型和泡型棘球蚴病患病率分别为5.5%(95/1 723)和8.2%(141/1 723)。男、女性棘球蚴病患病率分别为11.6%和16.0%(χ 2=7.0,P<0.05)。家犬粪抗原阳性率为11.3%(31/275)。剖检9只无主犬,其中5只棘球绦虫感染阳性,对检获的虫体经PCR-RFLP鉴定,1只犬感染细粒棘球绦虫,基因型为G1,4只犬感染多房棘球绦虫。牦牛、绵羊的细粒棘球蚴感染率分别为26.4%(14/53)和5/16,对从牦牛、绵羊检获的细粒棘球蚴经PCR-RFLP鉴定,基因型均为G1。捕获高原鼠兔239只,石渠棘球绦虫感染率为11.3%(27/239)。 结论 达日县存在细粒棘球绦虫、多房棘球绦虫和石渠棘球绦虫的分布,泡型和囊型棘球蚴病在人群中严重流行,犬是细粒棘球绦虫和多房棘球绦虫主要传染源。  相似文献   
110.
Background: Conventionally tube method is used for compatibility and cross matching in transfusion medicine.  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