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   734篇
  免费   43篇
  国内免费   1篇
耳鼻咽喉   2篇
儿科学   16篇
妇产科学   13篇
基础医学   60篇
口腔科学   23篇
临床医学   119篇
内科学   157篇
皮肤病学   37篇
神经病学   12篇
特种医学   87篇
外国民族医学   1篇
外科学   61篇
综合类   43篇
预防医学   69篇
眼科学   2篇
药学   48篇
中国医学   1篇
肿瘤学   27篇
  2022年   16篇
  2021年   14篇
  2020年   9篇
  2019年   13篇
  2018年   17篇
  2017年   12篇
  2016年   9篇
  2015年   17篇
  2014年   23篇
  2013年   21篇
  2012年   11篇
  2011年   17篇
  2010年   38篇
  2009年   31篇
  2008年   16篇
  2007年   13篇
  2006年   16篇
  2005年   9篇
  2004年   16篇
  2003年   16篇
  2002年   11篇
  2001年   12篇
  2000年   11篇
  1999年   9篇
  1998年   22篇
  1997年   16篇
  1996年   26篇
  1995年   19篇
  1994年   26篇
  1993年   29篇
  1992年   16篇
  1990年   9篇
  1989年   18篇
  1988年   18篇
  1987年   9篇
  1986年   8篇
  1985年   14篇
  1984年   8篇
  1983年   9篇
  1982年   11篇
  1981年   10篇
  1980年   11篇
  1979年   11篇
  1978年   9篇
  1977年   8篇
  1976年   7篇
  1974年   7篇
  1957年   9篇
  1949年   8篇
  1948年   8篇
排序方式: 共有778条查询结果,搜索用时 15 毫秒
31.
32.
Harwell  EL 《Radiology》1978,127(2):545
  相似文献   
33.
Lactat- und Pyruvat-Werte in der Vena testicularis von subfertilen Männern als Test für die Theorie der vorhandenen Hypoxie
Um die These von der testikulären Hypoxie bei subfertilen Männern mit Varikocele zu überprüfen wurden die Blutwerte von Lactat und Pyruvat aus der Vena testicularis mit denen einer Kontrollgruppe verglichen. Statistisch ergab sich ein niedrigerer Mittelwert für Lactat und Pyruvat bei den Varikocele-Patienten. Daraus wird die Schlußfolgerung gezogen, daß bei Varikocele keine Akkumulation von Milchsäure erfolgt und daß damit eine Hypoxie ausgeschlossen werden kann. Als die Mittelwerte der Konzentrationen für Lactat und Pyruvat in der Vena testicularis miteinander korreliert wurden, deutete sich an, daß bei Vorhandensein einer Varikocele eine gestörte Glykolyse besteht, die dem Stadium der Pyruvatbildung vorhergeht.  相似文献   
34.
OBJECTIVES: A prospective non-randomised evaluation of the octyl-2-cyanoacrylate (Dermabond) for skin closure in head and neck surgery. MATERIALS AND METHODS: An inception cohort of 52 patients managed by six otorhinolaryngologists head and neck surgeons at a single institution (university teaching and tertiary referral center) during the months of May-July 2004. The length of the skin incision varied from 3 to 30 cm (mean: 7 cm). Morbidity evaluation, longitudinal analysis of the evolution of the scar, and analysis of the degree of satisfaction. RESULTS: Postoperative death was not encountered. The overall morbidity rate was 3.8% (2/52). There was no instances of wound dehiscence's. A subcutaneous abscess was noted in one patient. From an aesthetic point of view, the scar appearance was considered to be slightly retracted during the first postoperative month and to be very good 2 to 4 months from initial surgery. Only one patient developed a minimal cheloid scar. Among the 47 patients who expressed an opinion postoperatively regarding the use of the octyl-2-cyanoacrylate (Dermabond) for skin closure, the degree of satisfaction was very high due to the ability to take an early shower (40 patients) followed by the lack of skin sutures (5 patients) and the lack of any allergic skin reaction (2 patients). CONCLUSION: At our department, the octyl-2-cyanoacrylate (Dermabond) for skin closure at the time of head and neck surgery is becoming more and more utilized due to the completion of a solid and aesthetic suture, the ability to take an early shower and the high degree of satisfaction expressed by the patients.  相似文献   
35.
36.
Mediastinal masses: alternative approaches to CT-guided needle biopsy   总被引:10,自引:1,他引:10  
Bressler  EL; Kirkham  JA 《Radiology》1994,191(2):391
  相似文献   
37.
The nuclear medicine bleeding scan is frequently insufficient to locate sites of bleeding precisely, in spite of its great sensitivity. A small, hand-held Geiger-Müller counter, placed directly on exposed intestine in the operating room, enables precise location of the probable bleeding site. In three patients, the technique allowed a minimal amount of intestine to be resected, distinguished between large- and small-intestinal hemorrhage, and eliminated other foci as sites of bleeding.  相似文献   
38.
Individuals who work in law enforcement careers are often subjected to stress that can result in health and emotional disorders. Many police departments have begun to offer wellness programs to support their employees. This pilot study designed and implemented a nutrition education component for an existing police department wellness program. Twenty-eight subjects completed the 12-month study that included nutrition counseling, seminars on nutrition and eating behaviors, and monitoring of weight and blood lipid levels. There was a significant group trend for decreased weight and lower total cholesterol levels. Results of the study led to the development of health policy standards for the Austin (Tex) Police Department. Wellness programs that involve registered dietitians can result in weight loss and lower cholesterol levels for employees in high-stress occupations as well as changes in departmental policy.  相似文献   
39.
40.
Intralesional (IL) vitamin D3 is an emerging treatment for cutaneous warts. However, its effectiveness and exact mechanism is not fully evaluated. We aimed to compare the efficacy and safety of IL purified protein derivative (PPD) and IL vitamin D3 in multiple warts and to investigate their systemic effect clinically and immunologically. Forty‐five patients with multiple extragenital warts were treated with IL‐PPD (22 patients) or IL vitamin D3 injection (23 patients) for a maximum of three sessions at 3 week intervals. Decrease in size and number of warts and adverse effects were evaluated. Serum interleukin‐12 (IL‐12) and interferon‐gamma (IFN‐γ) levels were measured before and 3 weeks after the last session. Higher clearance rates for all warts were observed with IL‐PPD compared to IL vitamin D (59.1% vs. 21.7% complete clearance, p < .001). Significant increase was found in both serum IL‐12 and IFN‐γ after PPD treatment (p = .034 and p = .04, respectively), but only IFN‐γ after vitamin D3 treatment (p = 0.02). Both IL vitamin D3 and PPD showed positive results in treatment of multiple warts. However, PPD showed higher clinical efficacy and more increase in both IL‐12 and IFN‐γ levels.  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