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   5683篇
  免费   250篇
  国内免费   19篇
耳鼻咽喉   28篇
儿科学   312篇
妇产科学   131篇
基础医学   732篇
口腔科学   105篇
临床医学   421篇
内科学   1069篇
皮肤病学   98篇
神经病学   376篇
特种医学   170篇
外科学   646篇
综合类   121篇
一般理论   1篇
预防医学   430篇
眼科学   379篇
药学   540篇
中国医学   32篇
肿瘤学   361篇
  2023年   35篇
  2022年   111篇
  2021年   190篇
  2020年   101篇
  2019年   111篇
  2018年   155篇
  2017年   103篇
  2016年   152篇
  2015年   162篇
  2014年   197篇
  2013年   258篇
  2012年   416篇
  2011年   451篇
  2010年   242篇
  2009年   207篇
  2008年   319篇
  2007年   339篇
  2006年   298篇
  2005年   268篇
  2004年   262篇
  2003年   221篇
  2002年   246篇
  2001年   131篇
  2000年   121篇
  1999年   87篇
  1998年   49篇
  1997年   36篇
  1996年   50篇
  1995年   18篇
  1994年   14篇
  1993年   20篇
  1992年   41篇
  1991年   43篇
  1990年   48篇
  1989年   52篇
  1988年   46篇
  1987年   42篇
  1986年   33篇
  1985年   35篇
  1984年   29篇
  1983年   26篇
  1982年   21篇
  1981年   17篇
  1980年   21篇
  1979年   32篇
  1978年   10篇
  1977年   15篇
  1974年   15篇
  1971年   9篇
  1970年   10篇
排序方式: 共有5952条查询结果,搜索用时 15 毫秒
141.
Journal of Artificial Organs - Veno-venous extracorporeal membrane oxygenation (ECMO) is typically instituted in severe respiratory failure, defined by Lung Injury Score, and caused either by...  相似文献   
142.
143.
144.
Background and aimsPreconditioning using different protocols has been tested to prevent antibody mediated rejection (ABMR) individually for ABO and HLA incompatibility. However, simultaneous presence of both barriers is still less explored. The aim of this study was to report outcomes of institutional desensitization protocol in renal transplant recipients with simultaneous ABO and HLA incompatibility.Materials and methodsThis was a retrospective study conducted from October 2015 to December 2018. All patients with a clinical diagnosis of dialysis dependent chronic kidney disease (CKD), who were prospective coexistent HLA and ABO incompatible renal transplant recipients were included in the study. Patients were followed up and graft function and patient survival was assessed at 1 y from the date of transplant.ResultsMedian and mode baseline anti-A titers were 64, while median and mode baseline anti-B titers were 256. All recipients were discharged by tenth postoperative day. None of the patients had any bleeding complications. Post transplant infection rate was found to be 20 %. A total of 54 therapeutic plasma exchange (TPE) procedures were performed before transplant and 8 were performed after transplant. Graft survival and patient survival was 100 % at 3, 6, 9, and 12 months. Range and mean follow-up period was 15–42 months and 23 months respectively. Mean glomerular filtration rate (GFR) at 1 y using the CKD-EPI equation was 85.25 ± 13.76 mL/min. Biopsy proven ABMR was observed in one case only which was managed with TPE and immunosuppression.ConclusionSimultaneous ABO and HLA incompatibility in renal transplant recipients can be managed successfully with adequate preconditioning and careful monitoring.  相似文献   
145.
146.
147.
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences - Random amplified polymorphic DNA-PCR (RAPD-PCR) analysis was used in combination with morphological...  相似文献   
148.

Aim

To study associations of dermatoglyphic features with malocclusion in Indian children.

Materials and methods

A total of 237 children aged 12–16 years, who attended our outpatient clinic in a government medical college, were selected. Finger and palm prints were collected, and fingertip pattern frequencies, total ridge counts (TRCs), and atd angles (formed by the triradii below the first and last digits and that in the hypothenar region of the palm) were calculated. These parameters were analyzed with their Angle’s class of malocclusion using appropriate statistical tests. Dermatoglyphic parameters were examined and asymmetry analysis was conducted in subjects with different occlusion patterns.

Results

Although no fingerprint pattern was found to be specific for a particular class of occlusion, increased tendencies toward high frequencies of whorls in subjects with class II malocclusion and plain arches in those with class III malocclusion were observed. Significant differences in atd angle and TRC were observed among malocclusion types (p = 0.0001). Asymmetry scores did not differ significantly.

Conclusion

Dermatoglyphic analysis can be used as an indicator of malocclusion at an early age, thereby aiding the development of treatments aiming to establish favorable occlusion. Inheritance and twin studies, as well as those conducted in different ethnic groups, are required to examine these relationships further.  相似文献   
149.
Two fraternal twin sisters developed cysticercosis localizing to the right lateral orbit over the same period after a presumed common-source exposure in China. This case demonstrates that cysticercosis can be related to travel. Similar temporal and spatial occurrences of these infections suggest a genetic tropism of the infecting organism in these twins.  相似文献   
150.
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