全文获取类型
收费全文 | 1525篇 |
免费 | 129篇 |
国内免费 | 113篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 67篇 |
妇产科学 | 11篇 |
基础医学 | 156篇 |
口腔科学 | 24篇 |
临床医学 | 186篇 |
内科学 | 350篇 |
皮肤病学 | 40篇 |
神经病学 | 39篇 |
特种医学 | 384篇 |
外国民族医学 | 1篇 |
外科学 | 156篇 |
综合类 | 44篇 |
预防医学 | 70篇 |
眼科学 | 85篇 |
药学 | 80篇 |
中国医学 | 1篇 |
肿瘤学 | 70篇 |
出版年
2023年 | 4篇 |
2021年 | 6篇 |
2020年 | 6篇 |
2019年 | 12篇 |
2018年 | 15篇 |
2017年 | 6篇 |
2016年 | 21篇 |
2015年 | 31篇 |
2014年 | 19篇 |
2013年 | 38篇 |
2012年 | 9篇 |
2011年 | 31篇 |
2010年 | 48篇 |
2009年 | 55篇 |
2008年 | 27篇 |
2007年 | 75篇 |
2006年 | 39篇 |
2005年 | 58篇 |
2004年 | 30篇 |
2003年 | 24篇 |
2002年 | 29篇 |
2001年 | 24篇 |
2000年 | 47篇 |
1999年 | 40篇 |
1998年 | 92篇 |
1997年 | 100篇 |
1996年 | 104篇 |
1995年 | 67篇 |
1994年 | 64篇 |
1993年 | 68篇 |
1992年 | 25篇 |
1991年 | 34篇 |
1990年 | 36篇 |
1989年 | 61篇 |
1988年 | 47篇 |
1987年 | 61篇 |
1986年 | 34篇 |
1985年 | 49篇 |
1984年 | 24篇 |
1983年 | 22篇 |
1982年 | 29篇 |
1981年 | 21篇 |
1980年 | 30篇 |
1979年 | 10篇 |
1978年 | 15篇 |
1977年 | 19篇 |
1976年 | 30篇 |
1975年 | 17篇 |
1970年 | 4篇 |
1966年 | 2篇 |
排序方式: 共有1767条查询结果,搜索用时 46 毫秒
1.
Michelle Cleary Garry Walter Jan Sayers Violeta Lopez Catherine Hungerford 《Issues in mental health nursing》2015,36(4):266-271
Cultures of performativity may contribute to organizational and individual arrogance. Workplace organizations have individuals who at various times will display arrogance, which may manifest in behaviours, such as an exaggerated sense of self-importance, dismissiveness of others, condescending behaviors and an impatient manner. Arrogance is not a flattering label and irrespective of the reason or the position of power, in the context of organizational behaviors, may not be useful and may even be detrimental to the work environment. Thus, it is timely to reflect on the implications of arrogance in the workplace. Advocacy and empowerment can be undermined and relationships adversely impacted, including the achievement of positive consumer outcomes. This paper provides an introduction to arrogance, and then discusses arrogance to promote awareness of the potential consequences of arrogance and its constituent behaviors. 相似文献
2.
Summary— To investigate if the functional alterations observed in resistance arteries of spontaneously hypertensive rats (SHRs) were also present at the coronary level, in vitro experiments were performed in mesenteric resistance arteries (MRA) and in right (RIC) and left interventricular coronary (LIC) arteries taken from 15–25-week-old SHR and age-matched Wistar Kyoto rats WKYs. Using a passive extension protocol, internal diameters corresponding to 100 mmHg intraluminal pressure (D100) were determined and vessels were set up to a normalized internal diameter (0.9 D100). SHR mesenteric resistance arteries had a significantly smaller diameter compared to WKY arteries, whereas both types of SHR coronary arteries had a greater diameter compared to those of WKY rats. In arteries in the absence of contracting agonist, nitro-L-arginine (NOLA, 100 μM) induced a progressive rise in basal tone, which could be reversed by subsequent addition of L-arginine (100 μM) but not D-arginine (100 μM). When expressed as percent of maximal contractions induced by agonists (noradrenaline, NA [10 μM] in MRA; serotonin, 5-HT [10 μM], in RIC and LIC), these contractions were significantly stronger in WKY compared to SHR coronary and mesenteric resistance arteries. In NA-precontracted MRA and 5HT-precontracted coronary arteries in the presence of indomethacin (10 μM), the magnitude of acetylcholine-induced maximal relaxations (expressed as percent of maximal contractions induced by agonists) was greater in WKY compared to SHR arteries. After a 30-min incubation period, NOLA (100 μM) completely inhibited relaxations induced by acetylcholine (0.01–10 μM) in all types of precontracted arteries. Subsequent additions of sodium nitroprusside, (SNP, 10 μM) induced complete relaxations in all preparations. These results show that a basal release of NO or NO-like compound by endothelial cells is present in isolated mesenteric resistance and coronary arteries of WKY rats and SHRs. The contribution of endothelium-derived relaxing factor-nitric oxide (EDRF-NO) to arterial tone was lower in MRA compared to coronary arteries in both strains and in SHR compared to WKY arteries. In the SHR preparations, the impaired relaxation induced by acetylcholine appeared to be due to a functional alteration of the endothelium in the presence of normal reactivity of the smooth muscle cells. 相似文献
3.
Cavernous haemangioma presenting as an orbital mass after enucleation for a choroidal melanoma: case report. 总被引:1,自引:0,他引:1 下载免费PDF全文
A patient presented with an ipsilateral orbital mass four years after enucleation for a choroidal malignant melanoma. Clinical examination revealed a darkly coloured mass suggestive of recurrent melanoma. CT scanning indicated a locally extensive tumour. Management was by excision without resort to orbital exenteration. Pathological examination revealed a cavernous haemangioma. The natural history of this tumour is discussed. 相似文献
4.
5.
6.
表小檗碱对α受体的作用 总被引:2,自引:0,他引:2
表小檗碱(epiberberine,EB)是从湖北产黄连(Coptis chinensis Franch)中提取的一种生物碱,属苯喹嗪类原小檗碱,对其药理作用的研究资料甚少,未见其对α肾上腺素体作用的报道。资料表明,许多原小檗碱类化合物有α受体阻滞作用,为从该类化合物中选择 相似文献
7.
8.
9.
10.
J L Hungerford N M Toma P N Plowman J E Kingston 《The British journal of ophthalmology》1995,79(2):109-111
A retrospective analysis has been performed of the results of external beam radiotherapy for retinoblastoma using a whole eye technique. Local tumour control has been assessed in a consecutive series of 175 eyes in 142 children all of whom received external beam radiotherapy as the primary treatment for retinoblastoma. Follow up ranged from 2 to 17 years (median 9 years). Tumour control rates have been analysed with respect to the Reese Ellsworth classification and the series includes eyes in groups I to V. Focal salvage therapy was given for persistent, recurrent, or new tumours after radiotherapy. Following whole eye radiotherapy alone, the overall ocular cure rate was 57%, though with salvage therapy 80% of eyes could be preserved. 相似文献