全文获取类型
收费全文 | 985篇 |
免费 | 60篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 69篇 |
妇产科学 | 43篇 |
基础医学 | 105篇 |
口腔科学 | 18篇 |
临床医学 | 73篇 |
内科学 | 277篇 |
皮肤病学 | 13篇 |
神经病学 | 72篇 |
特种医学 | 13篇 |
外科学 | 169篇 |
综合类 | 7篇 |
预防医学 | 70篇 |
眼科学 | 2篇 |
药学 | 61篇 |
中国医学 | 2篇 |
肿瘤学 | 46篇 |
出版年
2022年 | 3篇 |
2021年 | 13篇 |
2020年 | 8篇 |
2019年 | 15篇 |
2018年 | 16篇 |
2017年 | 15篇 |
2016年 | 22篇 |
2015年 | 16篇 |
2014年 | 19篇 |
2013年 | 36篇 |
2012年 | 73篇 |
2011年 | 87篇 |
2010年 | 41篇 |
2009年 | 35篇 |
2008年 | 63篇 |
2007年 | 47篇 |
2006年 | 46篇 |
2005年 | 41篇 |
2004年 | 46篇 |
2003年 | 32篇 |
2002年 | 43篇 |
2001年 | 37篇 |
2000年 | 37篇 |
1999年 | 27篇 |
1998年 | 10篇 |
1997年 | 6篇 |
1996年 | 11篇 |
1995年 | 8篇 |
1994年 | 7篇 |
1993年 | 10篇 |
1992年 | 17篇 |
1991年 | 28篇 |
1990年 | 18篇 |
1989年 | 14篇 |
1988年 | 5篇 |
1987年 | 7篇 |
1986年 | 12篇 |
1985年 | 9篇 |
1984年 | 3篇 |
1983年 | 5篇 |
1981年 | 4篇 |
1979年 | 8篇 |
1977年 | 3篇 |
1976年 | 3篇 |
1973年 | 4篇 |
1971年 | 4篇 |
1970年 | 5篇 |
1969年 | 3篇 |
1967年 | 4篇 |
1966年 | 5篇 |
排序方式: 共有1046条查询结果,搜索用时 234 毫秒
1.
2.
Dani Renato Penna Francisco José Nogueira Célio E. D. 《Journal of gastrointestinal cancer》1986,1(5-6):399-406
Journal of Gastrointestinal Cancer - The authors observed 329 consecutive cases of chronic calcifying pancreatitis (CCP) from January 1963 to January 1986. Alcoholism was the etiological agent in... 相似文献
3.
OBJECTIVE: To study the documentation of assessment, the treatment and the follow-up arrangements for children admitted to hospital with acute asthma. DESIGN: A retrospective audit of case notes. SETTING: Tertiary level teaching hospital. MAIN OUTCOME MEASURES: A comparison with the asthma management plan issued by the Thoracic Society of Australia and New Zealand. RESULTS: We found poor documentation of assessment of asthma severity, low referral rates for asthma education, and inappropriate use of chest radiography. Bronchodilator therapy did not follow published guidelines. Good follow-up arrangements were achieved. CONCLUSIONS: The proportion of children with documentation of the assessment of acute asthma was unacceptably low. 相似文献
4.
Menno van Gameren Maarten Witsenburg Johanna J M Takkenberg Derize Boshoff Luc Mertens Anton M van Oort Dani?l de Wolf Matthias Freund Narayanswani Sreeram Regina B?kenkamp Melle D Talsma Marc Gewillig 《European heart journal》2006,27(22):2709-2715
AIMS: Stenting has become an established interventional cardiology procedure for congenital heart disease. Although most stent procedures are completed successfully, complications may occur. This multicentre study evaluated early complications after stenting in patients with congenital heart disease, including potential risk factors. METHODS AND RESULTS: In this combined Dutch-Belgian retrospective study, 309 consecutive patients had undergone 366 catheterizations and received 464 stents in 13 different anatomical positions (418 sites). Seventy-two stenting-related complications (19%) occurred, of which 24 (5.7%) were major. Seven procedure-related deaths were documented (2.3%). Stent malpositioning and embolization were most common (7.7%). The use of non-premounted stents tended to be associated with higher complication rates. Centre inexperience with stenting and stenting of native vs. post-surgical stenosis tended to be associated with increased major complication rates. CONCLUSION: After stenting, complications are common for congenital heart disease. The vast diversity of stenotic sites combined with relatively small patient populations makes these procedures sensitive to complications. Combining operator experience may reduce the risks of stenting in congenital heart disease. The availability of premounted stents for greater vessel diameters will likely reduce incidences of stent migration and embolization. 相似文献
5.
Twenty three patients with fragile X syndrome underwent cardiovascular assessment. Echocardiography showed dilatation of the aortic root in 12 (52%) and mitral valve prolapse in five (22%), four of whom had an apical mid-systolic click on auscultation. Patients with fragile X syndrome have cardiac defects similar to those seen in other disorders of connective tissue such as Marfan's syndrome and Ehlers-Danlos syndrome. These, and other somatic features, suggest an underlying connective tissue dysplasia. 相似文献
6.
7.
Plasma cell counts on human jejunal biopsy specimens examined by immunofluorescence and immunoperoxidase techniques: a comparative study. 下载免费PDF全文
Ten human jejunal biopsy specimens were examined by both immunofluorescence (IF) and immunoperoxidase (IP) methods to compare both plasma cell counts and the distribution of extracellular immunoglobulins. Each specimen was cut into at least two portions, one fixed in 5% formaldehyde in phosphate-buffered saline before being snap-frozen and sectioned on a cryostat for IF, the other being fixed in half-strength Zenker and embedded in paraffin wax by standard methods for IP. Plasma cell counts were comparable in the eight biopsy specimens for which they could be estimated, geometric mean values being IgA 22.9 (IF), 19.3 (IP) and IgM 9.5 (IF), 10.6 (IP). Two specimens showing subtotal villous atrophy had too much extracellular IgA for plasma cell counts to be feasible. For these the IF methods had the advantage that the extracellular immunoglobulin was more readily distinguishable from background staining. 相似文献
8.
9.
OBJECTIVES: To determine the microbial load found on used critical medical devices (5 spinal anesthesia needles, 21 catheters, and 28 sheaths) prior to sterilization and to evaluate the effectiveness of hydrogen peroxide gas plasma against inoculated Bacillus subtilis var globigii (American Type Culture Collection 9372) spores. METHODS: Membrane filter and pour-plate methods were applied to estimate total microbial loads (aerobic and anaerobic, mesophilic and thermophilic, vegetative and spore forms). Spinal anesthesia needles (102 units) and sheath components (61 units) were inoculated with a suspension of B. subtilis spores. After drying, the devices were sterilized with hydrogen peroxide gas plasma. RESULTS: Higher counts of aerobic, mesophilic, and fungal organisms were recovered when the drying period was insufficient. Anaerobic spores were not found in any analyzed presterilization items. The hydrogen peroxide gas plasma effected a 5 to 7 log10-fold reduction in B. subtilis spore counts in well-dried needles and sheath components. CONCLUSIONS: The success of hydrogen peroxide gas plasma sterilization depends mostly on educating the staff to assure well-cleaned and dried reusable medical devices, allowing penetration of the hydrogen peroxide gas plasma into the critical points of the items and providing a reduction in organisms. 相似文献
10.