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   894篇
  免费   52篇
  国内免费   10篇
耳鼻咽喉   24篇
儿科学   39篇
妇产科学   46篇
基础医学   78篇
口腔科学   31篇
临床医学   78篇
内科学   224篇
皮肤病学   34篇
神经病学   31篇
特种医学   24篇
外科学   202篇
综合类   11篇
一般理论   1篇
预防医学   27篇
眼科学   20篇
药学   46篇
中国医学   3篇
肿瘤学   37篇
  2023年   4篇
  2022年   14篇
  2021年   19篇
  2020年   19篇
  2019年   28篇
  2018年   32篇
  2017年   30篇
  2016年   34篇
  2015年   34篇
  2014年   56篇
  2013年   56篇
  2012年   81篇
  2011年   61篇
  2010年   44篇
  2009年   33篇
  2008年   50篇
  2007年   54篇
  2006年   55篇
  2005年   59篇
  2004年   50篇
  2003年   54篇
  2002年   25篇
  2001年   10篇
  2000年   10篇
  1999年   5篇
  1998年   6篇
  1997年   4篇
  1996年   5篇
  1995年   2篇
  1994年   2篇
  1993年   4篇
  1992年   1篇
  1991年   1篇
  1990年   2篇
  1989年   2篇
  1988年   1篇
  1987年   1篇
  1972年   2篇
  1971年   1篇
  1970年   1篇
  1967年   1篇
  1966年   1篇
  1961年   1篇
  1959年   1篇
排序方式: 共有956条查询结果,搜索用时 15 毫秒
1.
ABSTRACT

Purpose

To investigate the effect of 1% tropicamide on anterior chamber aqueous flare (ACAF) measurements acquired with laser flare meter in patients with pseudoexfoliation.  相似文献   
2.
In this study, the antimicrobial activities of Trimethoprim (1), Trimethoprim + Maleic acid (2), Trimethoprim + Oxalic acid dihydrate (3), and Trimethoprim + trans-1,2-Cyclohexanedicarboxylic acid (4) were investigated for their in vitro growth inhibitory activity against human pathogenic as some bacteria and fungi. Substances were tested using the micro-broth dilution assay. The chemical agents showed the same activity against Escherichia coli, Pseudomonas aeruginosa, and Proteus vulgaris. Inhibitory activities of test chemicals against different Candida strains were determined to be widely moderate.  相似文献   
3.
4.
5.

Objective

This study explores the potential use of drones in searching for and locating victims and of motorized transportation of search and rescue providers in a mountain environment using a simulation model.

Methods

This prospective randomized simulation study was performed in order to compare two different search and rescue techniques in searching for an unconscious victim on snow-covered ground. In the control arm, the Classical Line Search Technique (CLT) was used, in which the search is performed on foot and the victim is reached on foot. In the intervention arm, the Drone-snowmobile Technique (DST) was used, the search being performed by drone and the victim reached by snowmobile. The primary outcome of the study was the comparison of the two search and rescue techniques in terms of first human contact time.

Results

Twenty search and rescue operations were conducted in this study. Median time to arrival at the mannequin was 57.3 min for CLT, compared to 8.9 min for DST. The median value of the total searched area was 88,322.0 m2 for CLT and 228,613.0 m2 for DST. The median area searched per minute was 1489.6 m2 for CLT and 32,979.9 m2 for DST (p < 0.01 for all comparisons).

Conclusions

In conclusion, a wider area can be searched faster by drone using DST compared to the classical technique, and the victim can be located faster and reached earlier with rescuers transported by snowmobile.  相似文献   
6.
Pituitary - Our aim was to investigate the changes in the composition of oral and gut microbiota in patients with newly diagnosed acromegaly and their relationship with IGF-1 levels. Oral and fecal...  相似文献   
7.
Our aim was to investigate the effects of hyaluronan on inflammatory cytokines in the synovial fluid of patients with knee osteoarthritis. The study was single blind, placebo-controlled, and randomized. We administered hyaluronan to 22 patients in the study group and placebo to 19 in the control group. Enzyme-linked immunosorbent assay was used to determine the levels of cytokines. Both HA and placebo caused a significant decrease in interleukin (IL)-6 levels (P=0.0001 and P=0.04, respectively). But it was more significant in the study group. However, IL-8 and tumor necrosis factor alpha (TNF-) levels did not change in either group (P>0.05). The amount of effusion decreased significantly in the study group (P=0.001) but not in the control group (P=0.133). It can be concluded that hyaluronan considerably decreased IL-6 levels, which correlated with clinical improvement, but had no effect on IL-8 and TNF- levels in synovial fluid. However, larger studies with longer follow-up periods are needed to explain the effect of hyaluronan on cytokines.  相似文献   
8.
9.
10.
Trigger finger (TF) is a condition that affects quality of life and one of the most common causes of hand pain and disability. TF is characterized by catching, snapping or locking of the involved finger flexor tendon, associated with pain. TF in the children occurs rarely than in adults and partial tendon laceration is an uncommon cause of TF in the children. Thus, our aim in this study to define TF due to partial flexor tendon laceration in a child.

Electronic supplementary material

The online version of this article (doi:10.1007/s12593-015-0180-8) contains supplementary material, which is available to authorized users.  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