全文获取类型
收费全文 | 419篇 |
免费 | 20篇 |
国内免费 | 14篇 |
专业分类
儿科学 | 20篇 |
妇产科学 | 3篇 |
基础医学 | 29篇 |
口腔科学 | 5篇 |
临床医学 | 43篇 |
内科学 | 71篇 |
皮肤病学 | 8篇 |
神经病学 | 15篇 |
特种医学 | 139篇 |
外科学 | 17篇 |
综合类 | 33篇 |
预防医学 | 16篇 |
眼科学 | 12篇 |
药学 | 24篇 |
中国医学 | 1篇 |
肿瘤学 | 17篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 2篇 |
2020年 | 2篇 |
2019年 | 4篇 |
2018年 | 5篇 |
2017年 | 4篇 |
2016年 | 2篇 |
2015年 | 2篇 |
2014年 | 5篇 |
2013年 | 9篇 |
2012年 | 4篇 |
2011年 | 3篇 |
2010年 | 11篇 |
2009年 | 16篇 |
2008年 | 9篇 |
2007年 | 8篇 |
2006年 | 12篇 |
2005年 | 10篇 |
2004年 | 3篇 |
2003年 | 7篇 |
2002年 | 9篇 |
2001年 | 8篇 |
2000年 | 6篇 |
1999年 | 12篇 |
1998年 | 25篇 |
1997年 | 38篇 |
1996年 | 26篇 |
1995年 | 22篇 |
1994年 | 23篇 |
1993年 | 18篇 |
1992年 | 4篇 |
1991年 | 11篇 |
1990年 | 5篇 |
1989年 | 23篇 |
1988年 | 15篇 |
1987年 | 16篇 |
1986年 | 9篇 |
1985年 | 11篇 |
1984年 | 5篇 |
1983年 | 10篇 |
1982年 | 9篇 |
1981年 | 11篇 |
1980年 | 6篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1975年 | 1篇 |
排序方式: 共有453条查询结果,搜索用时 0 毫秒
61.
Aruna Srivastava BN Nagpal PL Joshi JC Paliwal AP Dash 《International journal of health geographics》2009,8(1):30
Background
In India, presently malaria shows a declining trend whereas Plasmodium falciparum (Pf) cases show an up trend. In central India, specifically, Madhya Pradesh (M.P.) a forested and tribal area, control of malaria is logistically difficult and outbreaks are frequently recorded, reasons for this being inadequate surveillance, poor reporting, a time lag in reporting to decision makers and a lack of geo referenced information to pin point the trouble spots for a timely preventive action. 相似文献62.
The fibrinogen activity in thawed cryoprecipitate stored between 1 and 6 degrees C is maintained essentially unchanged in most bags for a month. Occasionally, a bag will have a reduction in fibrinogen. If pooling has not occurred, thawed cryoprecipitate should be useful as a source of fibrinogen for a period of time considerably in excess of the 6 hours allowed for its use as a source of factor VIII or von Willebrand factor. 相似文献
63.
Hepatic spiral CT: reduction of dose of intravenous contrast material 总被引:13,自引:0,他引:13
64.
In vitro and in vivo selectin-blocking activities of sulfated lipids and sulfated sialyl compounds 总被引:2,自引:0,他引:2
Mulligan MS; Warner RL; Lowe JB; Smith PL; Suzuki Y; Miyasaka M; Yamaguchi S; Ohta Y; Tsukada Y; Kiso M; Hasegawa A; Ward PA 《International immunology》1998,10(5):569-575
There is accumulating evidence that sulfated lipids, sulfated
oligosaccharides and other sulfated compounds are reactive with selectins
in a manner that interferes with selectin interactions with their natural
ligands. In the report we describe the ability of sulfated lipids
(sulfatides and gangliosides) and multimeric forms of sulfated sialic acid
to block binding of P- and E-selectin-Ig to neutrophils. The in vivo
ability of these compounds to block lung injury in rats following i.v.
infusion of purified cobra venom factor (CVF), which induces injury that is
L- and P-selectin dependent, was also determined as well as effects on
recruitment of neutrophils, as measured by lung myeloperoxidase. There was
a significant correlation between the ability of sulfated lipids and sialyl
compounds to interfere in vitro with P-selectin-Ig binding to neutrophils
and to protect against P-selectin-dependent acute lung injury induced by
CVF. The biological effects of these sulfated compounds were also
associated with diminished accumulation of neutrophils. The protective
effects of these compounds may be linked to their ability to interfere with
P- selectin binding to counter-receptors on neutrophils.
相似文献
65.
Murakami T; Baron RL; Peterson MS; Oliver JH rd; Davis PL; Confer SR; Federle MP 《Radiology》1996,200(1):69
66.
表皮生长因子对TPN大鼠肠粘膜机械屏障的影响 总被引:2,自引:1,他引:1
本文旨在探讨表皮生长因子(EGF)对TPN大鼠小肠粘膜机械屏障的保护作用。将48只SD大鼠随机分为正常对照组、TPN组以及TPN-EGF组。结果显示TPN组大鼠小肠绒毛面积、高度、隐窝深度、隐窝细胞数及有丝分裂指数均较对照组明显降低(P〈0.01);TPN-EGF组与对照组比较无显著差异(P〉0.05)。提示外源性补充EGF能促进TPN大鼠隐窝细胞增殖,恢复隐窝细胞生成率,从而达到保护肠粘膜机械屏 相似文献
67.
Temporomandibular joint: value of coronal MR images 总被引:3,自引:0,他引:3
68.
Counts of Pick bodies (PB), Pick cells (PC), senile plaques (SP) and neurofibrillary tangles (NFT) were made in the frontal and temporal cortex from patients with Pick's disease (PD). Lesions were stained histologically with hematoxylin and eosin (HE) and the Bielschowsky silver impregnation method and labeled immunohistochemically with antibodies raised to ubiquitin and tau. The greatest numbers of PB were revealed by immunohistochemistry. Counts of PB revealed by ubiquitin and tau were highly positively correlated which suggested that the two antibodies recognized virtually identical populations of PB. The greatest numbers of PC were revealed by HE followed by the anti-ubiquitin antibody. However, the correlation between counts was poor, suggesting that HE and ubiquitin revealed different populations of PC. The greatest numbers of SP and NFT were revealed by the Bielschowsky method indicating the presence of Alzheimer-type lesions not revealed by the immunohistochemistry. In addition, more NFT were revealed by the anti-ubiquitin compared with the anti-tau antibody. The data suggested that in PD: (i) the anti-ubiquitin and anti-tau antibodies were equally effective at labeling PB; (ii) both HE and anti-ubiquitin should be used to quantitate PC; and (iii) the Bielschowsky method should be used to quantitate SP and NFT. 相似文献
69.
70.