全文获取类型
收费全文 | 349篇 |
免费 | 20篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 29篇 |
妇产科学 | 5篇 |
基础医学 | 48篇 |
口腔科学 | 92篇 |
临床医学 | 29篇 |
内科学 | 31篇 |
皮肤病学 | 2篇 |
神经病学 | 19篇 |
特种医学 | 10篇 |
外科学 | 42篇 |
综合类 | 3篇 |
一般理论 | 1篇 |
预防医学 | 9篇 |
眼科学 | 1篇 |
药学 | 6篇 |
中国医学 | 1篇 |
肿瘤学 | 41篇 |
出版年
2023年 | 4篇 |
2022年 | 7篇 |
2021年 | 7篇 |
2020年 | 7篇 |
2019年 | 10篇 |
2018年 | 8篇 |
2017年 | 6篇 |
2016年 | 4篇 |
2015年 | 16篇 |
2014年 | 9篇 |
2013年 | 16篇 |
2012年 | 17篇 |
2011年 | 35篇 |
2010年 | 22篇 |
2009年 | 17篇 |
2008年 | 15篇 |
2007年 | 14篇 |
2006年 | 19篇 |
2005年 | 11篇 |
2004年 | 14篇 |
2003年 | 15篇 |
2002年 | 11篇 |
2001年 | 3篇 |
2000年 | 7篇 |
1999年 | 7篇 |
1998年 | 2篇 |
1997年 | 4篇 |
1996年 | 2篇 |
1995年 | 6篇 |
1993年 | 5篇 |
1992年 | 3篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1986年 | 3篇 |
1985年 | 6篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 4篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1974年 | 3篇 |
1973年 | 6篇 |
1972年 | 3篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1968年 | 1篇 |
1966年 | 1篇 |
1963年 | 1篇 |
1961年 | 1篇 |
排序方式: 共有370条查询结果,搜索用时 15 毫秒
361.
362.
Objective Muscle weakness in septic patients is a serious problem as it complicates and lengthens hospital stays, prolongs rehabilitation
and increases costs. We examined the effects of a chronic infection with Escherichia coli on muscle function, muscle mass, and the expression of nicotinic acetylcholine receptors (AChRs).
Design and setting Prospective, randomized animal study in an animal laboratory, university hospital.
Subjects Sprague-Dawley rats.
Interventions A catheter was implanted into the external jugular vein of anesthetized rats, and a dose of 3.2 × 108 CFU of E. coli bacteria was injected; the catheter was then sealed and tunneled subcutaneously.
Measurements and results Animals injected with E. coli bacteria showed a significant decrease in body and muscle mass over the 14-day experimental period. Neuromuscular function
was tested by mechanomyography on days 3, 7, and 14 following injection. Tetanic tension decreased over the time course of
sepsis, without effecting tetanic fade. Serum levels of acute-phase protein, α1-acid glycoprotein, were increased by day 3, and remained significantly higher until day 14. AChRs were quantitated using
125I-labeled bungarotoxin and revealed no differences between groups.
Conclusions Central venous injection of E. coli bacteria induces systemic inflammation evidenced as loss of body weight, muscle mass and increased α1-acid glycoprotein levels. The inflammation-induced muscle weakness is due to muscle atrophy and not to upregulated AChRs.
This model may prove useful for studying maneuvers to prevent muscle wasting with inflammation. 相似文献
363.
Wilson NH Gordan VV Brunton PA Wilson MA Crisp RJ Mjör IA 《The journal of adhesive dentistry》2006,8(1):47-51
PURPOSE: This two-centre study evaluated the clinical performance of Class I and Class II restorations of the giomer material Beautifil, placed using Fluorobond, a self-etching adhesive system, to determine the suitability of the test system as an alternative for the restoration of posterior teeth. MATERIALS AND METHODS: A total of 108 restorations, comprising 72 Class II and 36 Class I restorations, was placed predominantly in molars (82%). Evaulations using modified USPHS/Ryge criteria were conducted at baseline and thereafter at 6 months and 1, 2, and 3 years. Die stone replicas of the restored teeth were examined retrospectively. RESULTS: A total of 5 restorations was found to fail during the study-- 3 in the first year and 2 during the third year of the study. Occlusal marginal adaptation was less than ideal at baseline in 11% of cases, primarily as a consequence of overcontouring, as observed in the die stone replicas. The combined percentage Alpha ratings at 3 years were: colour match, 98%; marginal adaptation (occlusal), 78%; marginal adaptation (proximal), 97%; anatomic form (occlusal), 99%; anatomic form (proximal), 95%; surface roughness (occlusal), 100%; surface roughness (proximal), 100%; marginal staining (occlusal), 90%; marginal staining (proximal) 81%; interfacial staining (occlusal), 99%; interfacial staining (proximal), 100%; contacts (occlusal), 95%; contacts (proximal), 93%; sensitivity, 100%; secondary caries, 100%; lustre of restoration, 100%. CONCLUSION: It is concluded that the 3-year performance of Fluorobond-bonded Beautifil for Class I and II restorations demonstrated some marginal changes, but most of the direct evaluation ratings were > 90% Alpha, with the performance observed being similar in the two centres. 相似文献
364.
Slade I Bacchelli C Davies H Murray A Abbaszadeh F Hanks S Barfoot R Burke A Chisholm J Hewitt M Jenkinson H King D Morland B Pizer B Prescott K Saggar A Side L Traunecker H Vaidya S Ward P Futreal PA Vujanic G Nicholson AG Sebire N Turnbull C Priest JR Pritchard-Jones K Houlston R Stiller C Stratton MR Douglas J Rahman N 《Journal of medical genetics》2011,48(4):273-278
365.
Gilbert GH Richman JS Gordan VV Rindal DB Fellows JL Benjamin PL Wallace-Dawson M Williams OD;DPBRN Collaborative Group 《Journal of dental education》2011,75(4):453-465
Effectively addressing challenges of conducting research in nonacademic settings is crucial to its success. A dental practice-based research network called The Dental Practice-Based Research Network (DPBRN) is comprised of practitioner- investigators in two health maintenance organizations, several universities, many U.S. states, and three Scandinavian countries. Our objective in this article is to describe lessons learned from conducting studies in this research context; the studies are conducted by clinicians in community settings who may be doing their first research study. To date, twenty-one studies have been completed or are in implementation. These include a broad range of topic areas, enrollment sizes, and study designs. A total of 1,126 practitioner-investigators have participated in at least one study. After excluding one study because it involved electronic records queries only, these studies included more than 70,000 patient/participant units. Because the DPBRN is committed to being both practitioner- and patient-driven, all studies must be approved by its Executive Committee and a formal study section of academic clinical scientists. As a result of interacting with a diverse range of institutional and regulatory entities, funding agencies, practitioners, clinic staff, patients, academic scientists, and geographic areas, twenty-three key lessons have been learned. Patients' acceptance of these studies has been very high, judging from high participation rates and their completion of data forms. Early studies substantially informed later studies with regard to study design, practicality, forms design, informed consent process, and training and monitoring methods. Although time-intensive and complex, these solutions improved acceptability of practice-based research to patients, practitioners, and university researchers. 相似文献
366.
367.
368.
369.
Elizabeth Fialkowski Hélène Sudour-Bonnange Gordan M. Vujanic Robert C. Shamberger Tanzina Chowdhury Jennifer H. Aldrink Jonathan Davick Jesse Sandberg Rhoikos Furtwaengler Elizabeth Mullen 《Pediatric blood & cancer》2023,70(Z2):e30162
The diagnosis of multiple or diffuse renal lesions in a child is challenging by imaging and/or pathology. Optimal management requires distinguishing benign lesions such as nephrogenic rests from cancerous lesions such as Wilms tumor, but this is often difficult or impossible. This difficulty is compounded by the overlapping nature of our current radiologic and pathologic definitions of lesions along the spectrum of nephrogenic rests/nephroblastomatosis. We provide a review of these issues, as a collaborative effort between the Children's Oncology Group Renal Tumor Committee and International Society of Pediatric Oncology Renal Tumor Study Group. Our aim is to discuss current challenges in diagnosis and management of these renal lesions, encouraging future work toward consensus definitions for research and patient care. 相似文献
370.
Elham Memarian Ralph Heijmans Roderick C. Slieker Adriana Sierra Olga Gornik Joline W. J. Beulens Maja Hanic Petra Elders Julio Pascual Eric Sijbrands Gordan Lauc Viktoria Dotz Clara Barrios Leen M. ’t Hart Manfred Wuhrer Mandy van Hoek 《Diabetes/metabolism research and reviews》2023,39(7):e3685