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   276篇
  免费   17篇
  国内免费   2篇
儿科学   8篇
妇产科学   4篇
基础医学   30篇
口腔科学   6篇
临床医学   42篇
内科学   62篇
皮肤病学   10篇
神经病学   4篇
特种医学   7篇
外科学   24篇
综合类   7篇
预防医学   37篇
眼科学   1篇
药学   28篇
肿瘤学   25篇
  2022年   2篇
  2021年   10篇
  2020年   6篇
  2019年   10篇
  2018年   17篇
  2017年   7篇
  2016年   6篇
  2015年   8篇
  2014年   13篇
  2013年   13篇
  2012年   21篇
  2011年   21篇
  2010年   17篇
  2009年   8篇
  2008年   16篇
  2007年   25篇
  2006年   14篇
  2005年   17篇
  2004年   15篇
  2003年   2篇
  2002年   9篇
  2001年   3篇
  2000年   4篇
  1999年   3篇
  1998年   2篇
  1997年   2篇
  1995年   1篇
  1992年   1篇
  1991年   1篇
  1990年   1篇
  1989年   2篇
  1988年   1篇
  1985年   1篇
  1984年   1篇
  1983年   2篇
  1982年   1篇
  1981年   3篇
  1979年   2篇
  1977年   2篇
  1976年   1篇
  1975年   1篇
  1974年   2篇
  1972年   1篇
排序方式: 共有295条查询结果,搜索用时 679 毫秒
161.
CARE India with its UP Office has initiated demand generation and acceptability of services for reproductive health and birth spacing services at community level in two districts in the state of Uttar Pradesh. A total of 3,49,000 women of reproductive age will benefit from participation in program activities over the next five years. Out of total surveyed population of 3662, 798 women of reproductive age group were identified of whom 272 were found to be symptomatically positive in relation of STDs/RTIs giving the overall prevalence rate of 34%. Clinical as well as the microbiological examination was carried out on 193 of these 272 women in field conditions. Those found clinically and/or microbiologically positive were provided treatment and preventive advice. Total of 150 (77.7%) women were diagnosed on the basis of symptoms (syndromic approach) and 151 (78.2%) were diagnosed on the basis of clinical examinations. However, 137 (70.9%) were confirmed microbiologically positive. A large extent was found in the age group of 15 to 24 years. Confirmed cases were comparatively less among nulliparous women (63.6%) than multipara (73.2%) cases. 64.1% women were having watery discharge while 29.1% were having complaint of curd discharge. The discharge was offensive in only 1.9% cases while 4.9% reported mixed discharge. 54.4% women complaining of vaginal discharge were suffering from PID. The discharge were either bacterial alone (26.1%) or bacterial mixed with candidiasis (16.5%) or trichomoniasis (8.7%). Compared to syndromic approach, an improvement in the sensitivity (81.8%) and predictive accuracy (74.1%) was noted when cases were detected with the help of clinical examination.  相似文献   
162.
163.
We describe a rare case of Enterococcus avium endocarditis in a patient with an ovarian malignancy, and review 2 previously reported cases. We contend that Enterococcus avium bacteremia and endocarditis may be associated with gastrointestinal pathology.  相似文献   
164.
165.
166.
ONCOMINE: a cancer microarray database and integrated data-mining platform   总被引:10,自引:0,他引:10  
DNA microarray technology has led to an explosion of oncogenomic analyses, generating a wealth of data and uncovering the complex gene expression patterns of cancer. Unfortunately, due to the lack of a unifying bioinformatic resource, the majority of these data sit stagnant and disjointed following publication, massively underutilized by the cancer research community. Here, we present ONCOMINE, a cancer microarray database and web-based data-mining platform aimed at facilitating discovery from genome-wide expression analyses. To date, ONCOMINE contains 65 gene expression datasets comprising nearly 48 million gene expression measurements form over 4700 microarray experiments. Differential expression analyses comparing most major types of cancer with respective normal tissues as well as a variety of cancer subtypes and clinical-based and pathology-based analyses are available for exploration. Data can be queried and visualized for a selected gene across all analyses or for multiple genes in a selected analysis. Furthermore, gene sets can be limited to clinically important annotations including secreted, kinase, membrane, and known gene-drug target pairs to facilitate the discovery of novel biomarkers and therapeutic targets.  相似文献   
167.
Mitral annular calcification (MAC) is a chronic, progressive process characterized by calcium deposition on the mitral valve annulus. There is no current grading system to relay the severity of MAC. The primary purpose of this study was to investigate the extreme end of the severity spectrum in order to describe “exuberant mitral annular calcification”, and a retrospective chart review of all patients with exuberant mitral annulus calcification evaluated at Mayo Clinic Rochester between January 1996 and December 2014 was performed. This is the first study to define criteria of “exuberant mitral annular calcification”, emphasizing the importance of identifying the extreme degree of mitral annular calcification.  相似文献   
168.
PURPOSE: While both first-pass perfusion and late gadolinium enhancement by cardiovascular magnetic resonance (CMR) can assess coronary microvascular status in acute myocardial infarction (AMI), there are only limited data on their respective diagnostic utility. We aim to evaluate: the utility of first-pass perfusion and late gadolinium enhancement imaging in the detection and quantification of microvascular dysfunction after reperfused acute myocardial infarction, using TIMI frame count (TIMI FC) as the reference standard of microvascular assessment; and their relationship with infarct size and ventricular function. METHODS: First-pass perfusion and late gadolinium enhancement imaging were performed in 25 consecutive AMI patients (84% men, age 58 +/- 10) within 72 h of successful reperfusion. We assessed the myocardial extent of microvascular dysfunction using the size of the perfusion defect on first-pass perfusion (PD%) and the hypoenhanced core region within late gadolinium enhancement (MDEcore%). PD%, MDEcore%, and TIMI FC were analyzed independently of each other and with blinding to clinical data. We adjusted PD% and MDEcore% to the myocardial mass subtended by the infarct-related artery according to the 16-segment model. RESULTS: Median infarct size involved 13.9% (interquartile range: 8.5 to 22.2%) of the left ventricle and median left ventricular ejection fraction was 52% (interquartile range: 43 to 61%). PD% demonstrated evidence of microvascular dysfunction more frequently (84% vs. 36% of patients, p < 0.002) and involved a larger myocardial extent (23.5 +/- 17.5% vs. 3.5 +/- 7.7%, p < 0.001) compared to MDEcore%. PD% had strong correlations with TIMI FC (Spearman rho = 0.62, p < 0.001) and infarct size (rho = 0.64, p < 0.001), and a moderate correlation with LVEF (rho = -0.39, p = 0.055). MDEcore% also correlated with TIMI FC (rho = 0.54, p = 0.005) and infarct size (rho = 0.52, p < 0.01) but not with LVEF (p = NS). CONCLUSIONS: PD% appeared to provide a stronger noninvasive assessment of the microvascular function than MDEcore% and correlated well with prognostic markers such as left ventricular ejection fraction and infarct size. Future studies should consider quantitative analyses of both first-pass perfusion and late gadolinium enhancement imaging in the evaluation of novel therapies targeted to the microvasculature of the infarct-related artery.  相似文献   
169.
170.
OBJECTIVE: To compare efficacy of sublingual (S/L), oral and vaginal routes of misoprostol administration for cervical priming before suction evacuation (SE) under local anaesthesia. METHODS: In a prospective randomised clinical trial, 200 women in the first trimester of pregnancy were randomised into four groups of 50 each. Patients in control group did not receive any medication before SE while other treatment groups received 400 microg of misoprostol three hours prior to SE either by sublingual/oral or by vaginal route. Main outcome measure was basal cervical dilatation while the secondary outcome measures were operative blood loss, time duration of surgery, patient satisfaction, pain perception and adverse effects. RESULTS: Sublingual group had a higher dilatation (9.9 +/- 2.1 mm; P < 0.001) and lower time duration of surgery (3.6 +/- 1.0 min; P < 0.01) as compared to oral (8.2 +/- 2.6 mm, 4.9 +/- 1.7 min) or vaginal routes (7.6 +/- 2.6 mm, 5.2 +/- 1.8 min). Mean pain score of the sublingual group was significantly lower (2.4 + 1.3; P < 0.001) as compared to oral (3.4 +/- 1.3) or vaginal routes (3.6 +/- 1.2). Patient acceptability was higher for sublingual (53 of 150) and oral routes (62 of 150) as compared to vaginal (35 of 150) route. CONCLUSION: Sublingual route was significantly more effective than oral or vaginal administration of misoprostol for cervical dilatation. To the best of our knowledge, this is the first study to simultaneously compare the efficacy of sublingual, oral and vaginal routes of misoprostol for cervical priming before SE.  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