全文获取类型
收费全文 | 1322篇 |
免费 | 50篇 |
国内免费 | 81篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 77篇 |
妇产科学 | 10篇 |
基础医学 | 143篇 |
口腔科学 | 23篇 |
临床医学 | 221篇 |
内科学 | 312篇 |
皮肤病学 | 37篇 |
神经病学 | 30篇 |
特种医学 | 300篇 |
外科学 | 60篇 |
综合类 | 31篇 |
预防医学 | 40篇 |
眼科学 | 37篇 |
药学 | 72篇 |
肿瘤学 | 59篇 |
出版年
2022年 | 5篇 |
2021年 | 8篇 |
2019年 | 11篇 |
2018年 | 7篇 |
2017年 | 9篇 |
2016年 | 11篇 |
2015年 | 19篇 |
2014年 | 14篇 |
2013年 | 30篇 |
2012年 | 12篇 |
2011年 | 22篇 |
2010年 | 58篇 |
2009年 | 49篇 |
2008年 | 26篇 |
2007年 | 59篇 |
2006年 | 29篇 |
2005年 | 28篇 |
2004年 | 12篇 |
2003年 | 23篇 |
2002年 | 21篇 |
2001年 | 22篇 |
2000年 | 22篇 |
1999年 | 27篇 |
1998年 | 96篇 |
1997年 | 88篇 |
1996年 | 110篇 |
1995年 | 84篇 |
1994年 | 87篇 |
1993年 | 74篇 |
1992年 | 21篇 |
1991年 | 32篇 |
1990年 | 28篇 |
1989年 | 33篇 |
1988年 | 37篇 |
1987年 | 27篇 |
1986年 | 34篇 |
1985年 | 32篇 |
1984年 | 13篇 |
1983年 | 21篇 |
1982年 | 20篇 |
1981年 | 21篇 |
1980年 | 17篇 |
1979年 | 4篇 |
1978年 | 9篇 |
1977年 | 14篇 |
1976年 | 13篇 |
1975年 | 7篇 |
1970年 | 1篇 |
1969年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有1453条查询结果,搜索用时 15 毫秒
11.
12.
13.
Pernes JM; Vitoux JF; Brenoit P; Raynaud A; Parola JL; Roth JP; Angel CY; Fiessinger JN; Roncato M; Gaux JC 《Radiology》1986,158(2):481-485
Thirty-five patients hospitalized for recent angiographically documented arterial occlusion in the legs (27 femoropopliteal arteries and eight grafts) benefited from local fibrinolytic therapy delivered at the site of the occlusion with a 4- or 5-F catheter. This therapy combined a continuous urokinase (UK) infusion of 1,000 U/kg/hour and a lysyl plasminogen (LYS-PLG) infusion of 15 microkatals every 30 minutes. Angiographically confirmed lysis was obtained in 85% of the cases. Only 3% of the patients had major and 6% had minor groin hematomas. Only two patients had concentrations of fibrinogen as low as 100 mg/dl. Intravascular infusion of UK-LYS-PLG is as effective as streptokinase. Its excellent tolerance makes it a good alternative in the treatment of acute ischemia in the lower limbs. 相似文献
14.
15.
16.
17.
18.
WINOCOUR PH; KALUVYA S; BROWN L; FARRER M; MILLAR JP; NEIL HAW; ALBERTI KGMM 《QJM : monthly journal of the Association of Physicians》1991,79(3):539-560
Hyperinsulinaemia is said to be a risk factor for cardiovasculardisease, but the extent to which different insulinaemic measuresare associated with vascular risk factors in ostensibly healthyindividuals, and whether they operate independently in men andwomen, remains uncertain. The association between risk factors and various insulinaemicmeasures was examined in 148 men and 118 women who were normoglycaemic,normotensive, and non-obese (body mass index in men <27,in women <25). A 75 g glucose tolerance test was administeredafter blood sampling for fibrinogen, lipids, lipoproteins andinsulin. Insulin was also measured after 1 and 2 hours. Significantunivariate correlations (p<0.01) were most consistently recordedbetween insulinaemic measures and fasting serum triglyceridesin men and women, whilst systolic blood pressure only correlatedwith insulinaemia in women, and diastolic blood pressure correlatedwith fasting and 2 hour insulinaemic measures in men and women.Inconsistent associations were noted with total serum cholesterolin men and women, with high density lipoprotein cholesterol,body mass index, apoprotein B and A1 in men, and with fibrinogenin women. Age was not correlated with any insulinaemic measurein men or women. Differences in vascular risk factors between quintiles of theinsulinaemic measures were examined, after correction for bodymass index. The dominant association with fasting and post-glucoseload insulinaemic measures was with triglycerides, especiallyin women, with less frequent graded differences between quintilesobserved for total cholesterol, and diastolic and systolic bloodpressures in men and women. The incidence of other risk factors often only differed in thelowest or highest quintile in comparison to other quintiles,suggesting a threshold rather than a graded effect. Furthermore,differences in HDL cholesterol and apoprotein B were only recordedfor top quintiles of post-glucose challenge/integrated insulinaemicmeasures in men, whilst serum fibrinogen concentrations onlydiffered significantly in women in the top insulinaemic areaunder the curve quintile. In the absence of additional risk factors such as diabetes,hypertension and obesity, insulinaemic measures are not consistentlyrelated to blood pressure and measures of lipid metabolism andcoagulation, and are thus a weak predictor of other cardiovascularrisk factors. The vascular risk profile associated with insulinappears somewhat different in apparently healthy men and women. 相似文献
19.
Limited-field-of-view radio-frequency receiver antennas provide improved near-field sensitivity for magnetic resonance imaging by decreasing the antenna volume. The Helmholtz-type surface coil, consisting of two flat rings, is an organ-encompassing antenna that takes advantage of this principle to yield an improved signal-to-noise ratio (S/N). The coil was tested in a group of 50 patients and 16 healthy volunteers. Images obtained with the Helmholtz coil demonstrated quantitatively superior S/N of 2.2-fold or greater than that of comparison body coil images, as well as qualitatively superior anatomic resolution. 相似文献
20.