全文获取类型
收费全文 | 12299篇 |
免费 | 956篇 |
国内免费 | 31篇 |
专业分类
耳鼻咽喉 | 202篇 |
儿科学 | 421篇 |
妇产科学 | 372篇 |
基础医学 | 1716篇 |
口腔科学 | 142篇 |
临床医学 | 1188篇 |
内科学 | 2714篇 |
皮肤病学 | 207篇 |
神经病学 | 1372篇 |
特种医学 | 351篇 |
外科学 | 1682篇 |
综合类 | 191篇 |
现状与发展 | 1篇 |
一般理论 | 10篇 |
预防医学 | 1024篇 |
眼科学 | 203篇 |
药学 | 622篇 |
中国医学 | 8篇 |
肿瘤学 | 860篇 |
出版年
2021年 | 196篇 |
2020年 | 118篇 |
2019年 | 156篇 |
2018年 | 215篇 |
2017年 | 170篇 |
2016年 | 182篇 |
2015年 | 199篇 |
2014年 | 289篇 |
2013年 | 497篇 |
2012年 | 667篇 |
2011年 | 694篇 |
2010年 | 360篇 |
2009年 | 337篇 |
2008年 | 596篇 |
2007年 | 599篇 |
2006年 | 617篇 |
2005年 | 580篇 |
2004年 | 570篇 |
2003年 | 555篇 |
2002年 | 569篇 |
2001年 | 245篇 |
2000年 | 205篇 |
1999年 | 245篇 |
1998年 | 127篇 |
1997年 | 117篇 |
1996年 | 128篇 |
1995年 | 110篇 |
1994年 | 87篇 |
1993年 | 98篇 |
1992年 | 217篇 |
1991年 | 192篇 |
1990年 | 166篇 |
1989年 | 172篇 |
1988年 | 159篇 |
1987年 | 183篇 |
1986年 | 159篇 |
1985年 | 167篇 |
1984年 | 163篇 |
1983年 | 166篇 |
1982年 | 147篇 |
1981年 | 140篇 |
1980年 | 120篇 |
1979年 | 131篇 |
1978年 | 114篇 |
1977年 | 99篇 |
1976年 | 89篇 |
1974年 | 86篇 |
1973年 | 99篇 |
1972年 | 83篇 |
1971年 | 88篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Jerome Marley Julia Taylor Jane Brocksom Kath Schubach Andrea Nixon Paula Allchorne Susanne Vahr Lauridsen 《International Journal of Urological Nursing》2020,14(1):5-12
A series of three World Café events centred on the topic of developing an Educational Framework for Urological Nursing [EFUN] were held by the British Association of Urological Nurses [BAUN], the European Association of Urology Nurses [EAUN] and the Australian and New Zealand Urological Nursing Society [ANZUNS] between 2017 and 2019. About 376 urology nurses participated in these “conversations that matter” and generated 1047 individual response items that were grouped into themes to assist the three associations to take the creation of an EFUN to the next level. Areas explored centred on four aspects: what any agreed educational framework for urology nursing should contain; the academic level at which education should be provided; who should be recruited as collaborators on writing an educational framework and, lastly, just how any emergent framework should be used. Analysis of the conversational data indicate that there exists within the urological nursing community a collective wisdom regarding their educational needs and how these needs should be met. 相似文献
3.
4.
5.
Ayad Al Darrab Jerome Fan Christopher M B Fernandes Rosanne Zimmerman Rhonda Smith Andrew Worster Teresa Smith Kelly O'Connor 《European journal of emergency medicine》2006,13(1):32-35
STUDY OBJECTIVES: Use of fast track has been shown to improve the emergency department flow of less urgent patients. It has been speculated, however, that this could negatively affect the care of urgent patients. The objective of this study was to determine whether a dedicated fast track for less urgent patients [Canadian Triage and Acuity scale category 4/5 (CTAS 4/5)] affected (1) the time to assessment for urgent patients (CTAS 3), (2) the length of stay for less urgent patients (CTAS 4 and 5), and (3) the left-without-being-seen rate. METHODS: In June 2003, fast track was opened in our emergency department from 13:00 to 19:00 h. A before-after intervention comparison analysis was completed for 1 week in Aug 2002 and the same week in Aug 2003. Data collected included (1) time to assessment of CTAS 3 patients, (2) the length of stay for CTAS 4/5 patients, and (3) percentage of patients who left without being seen. RESULTS: A total of 368 patients were reviewed for 2002 and 380 patients were reviewed for 2003. Median time to assessment of CTAS 3 patients presenting from 13:00 to 19:00 h was reduced from 66 min (Interquartile range: 40, 94 min) in 2002 to 60 min (IQR: 38, 108 min) after fast track was open in 2003 (P = 0.95). Median length of stay of CTAS 4 and 5 patients was reduced from 170 min (IQR: 111, 256 min) to 110 min (IQR: 69, 185 min) (P < 0.001). The overall left-without-being-seen rate decreased from 5% (20/368) to 2% (9/380). CONCLUSION: A dedicated fast track for CTAS 4/5 patients can reduce the length of stay and the left-without-being-seen rate with no impact on CTAS 3 patients seen in the main emergency department. 相似文献
6.
7.
Sixty-three mallards were fed one of ten poly(methyl methacrylate) based synthetic grit formulations containing varying concentrations of a proposed wildlife contraceptive (nicarbazin), plasticizer (acetyl tributylcitrate) and/or cross-linking agent (1,4-butanediol diacrylate). Release characteristics of the contraceptive agent were monitored for the purpose of developing a contraceptive formulation for control of pest waterfowl in urban settings. The addition of plasticizer increased the erosion rate (t(1/2)=0.97-2.85 days), cross-linking the polymer matrix slightly decreased the erosion rate (t(1/2)=4.45-5.05 days) and increasing the concentration of the contraceptive agent increased the erosion rate (t(1/2)=3.3 and 9.9 days at 60% and 7.5% active ingredient, respectively). The larger and smaller grit pieces had longer half lives at 11.0 and 11.6 days, respectively while the mid sized grit had a half life of 4.95 days. Control grit had a half life of 12.7 days based on weight loss. Analysis of blood and feces for monitoring release from the grit and approximate indirect plasma levels of the active ingredient proved feasible. 相似文献
8.
9.
10.
Effects of cytokines and R-837, a cytokine inducer, on UV-irradiation augmented recurrent genital herpes in guinea pigs. 总被引:1,自引:0,他引:1
We have recently reported that latently HSV-2-infected guinea pigs exhibit a three- to four-fold increase in recurrent lesions after exposure to ultraviolet radiation (UV), allowing rapid evaluation of antiviral drugs in treating recurrent HSV disease. In this report we examine the effect of alpha interferon (IFN-alpha), interleukin-2 (IL-2), and a cytokine inducer (R-837) on UV-induced recurrent genital herpes. We have previously shown that topical R-837 is a biologic response modifier with no in vitro anti-HSV activity, but with potent anti-HSV activity in vivo due to cytokine induction and enhancement of cell-mediated immune responses. Three-day regimens of intravaginal R-837, or five-day intraperitoneal (i.p.) administration of IFN-alpha or of IL-2 each significantly reduced recurrent genital HSV-2 disease that occurred within 7 days of UV exposure, suggesting that cytokines or cytokine inducers may be useful in the treatment of recurrent HSV disease. This model using ultraviolet radiation to induce recurrent herpes simplex virus infection proved useful in the evaluation of immunoactive agents as putative antiviral drugs. 相似文献