全文获取类型
收费全文 | 1500篇 |
免费 | 117篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 97篇 |
妇产科学 | 22篇 |
基础医学 | 171篇 |
口腔科学 | 37篇 |
临床医学 | 163篇 |
内科学 | 312篇 |
皮肤病学 | 26篇 |
神经病学 | 47篇 |
特种医学 | 320篇 |
外科学 | 113篇 |
综合类 | 44篇 |
一般理论 | 1篇 |
预防医学 | 93篇 |
眼科学 | 6篇 |
药学 | 86篇 |
肿瘤学 | 86篇 |
出版年
2021年 | 13篇 |
2020年 | 12篇 |
2019年 | 11篇 |
2018年 | 24篇 |
2017年 | 8篇 |
2016年 | 8篇 |
2015年 | 18篇 |
2014年 | 26篇 |
2013年 | 32篇 |
2012年 | 21篇 |
2011年 | 38篇 |
2010年 | 46篇 |
2009年 | 40篇 |
2008年 | 20篇 |
2007年 | 42篇 |
2006年 | 37篇 |
2005年 | 38篇 |
2004年 | 39篇 |
2003年 | 27篇 |
2002年 | 31篇 |
2001年 | 30篇 |
2000年 | 31篇 |
1999年 | 34篇 |
1998年 | 101篇 |
1997年 | 74篇 |
1996年 | 82篇 |
1995年 | 62篇 |
1994年 | 62篇 |
1993年 | 66篇 |
1992年 | 26篇 |
1991年 | 20篇 |
1990年 | 27篇 |
1989年 | 47篇 |
1988年 | 37篇 |
1987年 | 45篇 |
1986年 | 31篇 |
1985年 | 41篇 |
1984年 | 37篇 |
1983年 | 23篇 |
1982年 | 26篇 |
1981年 | 30篇 |
1980年 | 31篇 |
1979年 | 11篇 |
1978年 | 18篇 |
1977年 | 19篇 |
1976年 | 21篇 |
1975年 | 17篇 |
1973年 | 5篇 |
1972年 | 4篇 |
1967年 | 5篇 |
排序方式: 共有1628条查询结果,搜索用时 15 毫秒
91.
A 4 year old girl treated with a standard chemotherapy protocol for acute lymphoblastic leukaemia developed hepatic candidosis during the consolidation phase. This relapsed after a prolonged course of amphotericin B and flucytosine. An eight week course of liposomal amphotericin produced a marked clinical improvement which was sustained for one year. A subsequent relapse was associated with transformation to myelodysplastic leukaemia. 相似文献
92.
It is imperative to know the details of the anatomy of the nose before understanding any surgical procedure performed on the nose. The details presented in this article should help the experienced and the novice surgeon accomplish the difficult task of a rhinoplasty. 相似文献
93.
94.
95.
96.
SM Dyer IS de la Lande DB Frewin & RJ Head 《Clinical and experimental pharmacology & physiology》1998,25(3-4):246-251
1. 5-Hydroxytryptamine (5-HT) exerts both contractile and relaxant effects in the marmoset isolated aorta, actions that are unaffected by the 5-HT2 antagonist ketanserin. The aim of the present study was to define the receptors mediating the contractile activity of 5-HT in the marmoset aorta.
2. Contractile responses were elicited in aortic rings that were either: (i) precontracted submaximally with the thromboxane A2 agonist U44069 in order to amplify the responses; or (ii) exposed to N ω -nitro- L -arginine (100 μmol/L) plus LY 53857 (0.1 μmol/L; a 5-HT2 receptor antagonist shown previously to inhibit relaxation). The effect of 5-HT on adenosine 3',5'-cyclic monophosphate (cAMP) formation was also investigated.
3. The effects of agonists and antagonists comprised: (i) agonist potencies in the order 5-carboxamidotryptamine > 5-HT > sumatriptan > 8-hydroxy-2-(di- n -propylamino)tetralin; (ii) inhibition of contractile action of 5-HT by the 5-HT1D antagonist GR 127935; (iii) a contractile response to methysergide; (iv) a lack of effect of tropisetron, an antagonist of 5-HT3 and 5-HT4 receptors; and (v) inhibition of forskolin-stimulated cAMP formation by 5-HT (in the presence of LY 53857), indicative of negative coupling to adenylate cyclase.
4. The above effects fulfil the criteria for a 5-HT1 -like receptor. In view of the previous finding that this contractile response is insensitive to ketanserin, it is concluded that the contractile effects of 5-HT in the marmoset aorta are mediated exclusively by a 5-HT1 -like receptor. 相似文献
2. Contractile responses were elicited in aortic rings that were either: (i) precontracted submaximally with the thromboxane A
3. The effects of agonists and antagonists comprised: (i) agonist potencies in the order 5-carboxamidotryptamine > 5-HT > sumatriptan > 8-hydroxy-2-(di- n -propylamino)tetralin; (ii) inhibition of contractile action of 5-HT by the 5-HT
4. The above effects fulfil the criteria for a 5-HT
97.
98.
Bridging bronchus: a rare airway anomaly 总被引:1,自引:0,他引:1
99.
100.