全文获取类型
收费全文 | 590篇 |
免费 | 33篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 40篇 |
妇产科学 | 22篇 |
基础医学 | 54篇 |
口腔科学 | 5篇 |
临床医学 | 83篇 |
内科学 | 71篇 |
皮肤病学 | 3篇 |
神经病学 | 21篇 |
特种医学 | 10篇 |
外科学 | 91篇 |
综合类 | 11篇 |
一般理论 | 7篇 |
预防医学 | 119篇 |
眼科学 | 2篇 |
药学 | 79篇 |
中国医学 | 1篇 |
肿瘤学 | 9篇 |
出版年
2021年 | 5篇 |
2018年 | 9篇 |
2017年 | 10篇 |
2016年 | 9篇 |
2015年 | 8篇 |
2014年 | 14篇 |
2013年 | 26篇 |
2012年 | 15篇 |
2011年 | 23篇 |
2010年 | 16篇 |
2009年 | 10篇 |
2008年 | 22篇 |
2007年 | 28篇 |
2006年 | 21篇 |
2005年 | 26篇 |
2004年 | 25篇 |
2003年 | 24篇 |
2002年 | 13篇 |
2001年 | 14篇 |
2000年 | 14篇 |
1999年 | 15篇 |
1998年 | 12篇 |
1997年 | 4篇 |
1996年 | 6篇 |
1995年 | 6篇 |
1994年 | 6篇 |
1993年 | 5篇 |
1992年 | 12篇 |
1991年 | 11篇 |
1990年 | 19篇 |
1989年 | 11篇 |
1988年 | 10篇 |
1987年 | 8篇 |
1986年 | 7篇 |
1985年 | 5篇 |
1979年 | 7篇 |
1975年 | 4篇 |
1974年 | 7篇 |
1973年 | 6篇 |
1971年 | 9篇 |
1969年 | 9篇 |
1968年 | 7篇 |
1967年 | 6篇 |
1966年 | 5篇 |
1928年 | 6篇 |
1927年 | 6篇 |
1925年 | 4篇 |
1924年 | 9篇 |
1923年 | 6篇 |
1889年 | 5篇 |
排序方式: 共有630条查询结果,搜索用时 515 毫秒
1.
Miguel A. Sanz Pau Montesinos Haesook T. Kim Guillermo J. Ruiz-Argüelles María S. Undurraga María R. Uriarte Lem Martínez Rafael H. Jacomo Homero Gutiérrez-Aguirre Raul A. M. Melo Rosane Bittencourt Ricardo Pasquini Katia Pagnano Evandro M. Fagundes Edo Vellenga Alexandra Holowiecka Ana J. González-Huerta Pascual Fernández Javier De la Serna Salut Brunet Elena De Lisa José González-Campos José M. Ribera Isabel Krsnik Arnold Ganser Nancy Berliner Raul C. Ribeiro Francesco Lo-Coco Bob L?wenberg Eduardo M. Rego 《Annals of hematology》2015,94(8):1347-1356
2.
3.
The ulcerogenic effect of five different salts of alprenolol were tested against placebo in a porcine oesophageal test model. The salts with high water solubility, such as the hydrochloride and the fumarate, gave rise to the highest plasma concentrations of alprenolol and evoked serious oesophageal lesions, while the salts with low solubility-the benzoate, maleate and sebacate-had no irritative effect on the oesophagus. The plasma levels of alprenolol were much higher following administration of alprenolol hydrochloride in the oesophagus than after an identical intraduodenal dose of the same salt possibly because of the avoidance of the first-pass degradation during oesophageal absorption. 相似文献
4.
5.
A high percentage yield of tyrosine hydroxylase-positive cells from rat E14 mesencephalic cell culture. 总被引:6,自引:0,他引:6
In the ventral mesencephalon of the E14 rat fetus, 90% of the dopaminergic, tyrosine hydroxylase positive (TH+) cells are localized in 1.0 mm3 of tissue. This same ventral mesencephalic region also contains 90% of the dopamine content of the E14 ventral brainstem (2.2 +/- 0.3 nmol/mg protein). When cells were prepared for culturing from this localized area, and plated at a density of 2.5 x 10(5) cells/cm2, 17-21% of the cells were TH+, at 4 and 12 h, and at 1, 5, 7 and 10 days after plating. The percentage of TH+ cells was also 17-21% when examined at 4 h, 12 h or 5 days after plating at densities ranging from 7.8 x 10(3) to 2.5 x 10(5) cells/cm2. However, cell survival at a density of less than 6.2 x 10(4) cells/cm2 was poor after 5 days in culture. Based on the degree of neurite elongation and complexity, cell maturation appeared to be complete at 5 days in culture (DIV5), and appeared to be maintained at this level up to DIV10. By DIV14, neurite retraction was evident, and the cells were more rounded. These signs may indicate the inception of senescence in the cultures. A benztropine-sensitive, concentration-dependent dopamine uptake mechanism was demonstrated in the cultures at DIV7, and DA could be released from preloaded cells using 50 mM K+. Five morphological subtypes of TH+ cells were identified in the cultures. This primary culture of the ventral mesencephalic, dopaminergic area, with a high percentage of TH+ cells, is suitable for use in acute biochemical and cellular studies, between DIV 5 and DIV10. 相似文献
6.
7.
Dr. Em. N. v. Regéczy 《Pflügers Archiv : European journal of physiology》1883,30(1):544-595
Ohne Zusammenfassung 相似文献
8.
Reg.-Med.-Rat. Dr. C. Göcke 《Archives of orthopaedic and trauma surgery》1923,22(1-2):25-29
Ohne Zusammenfassung
Von der Wiedergabe der Abbildungen mu?te aus naheliegenden Gründen abgesehen werden. 相似文献
9.
P Ibern Regàs 《Gaceta sanitaria / S.E.S.P.A.S》1992,6(31):176-185
The satisfaction analysis in health services has been object of rising interest recently. The different instruments of measurement known show the diversity of conceptualism, range of applications and methodologies. The article revises selectively and not exhaustively different instruments as well as the approximations to the concept of satisfaction from the marketing disciplines and the investigations in health services. Special emphasis is dedicated to the analysis of satisfaction in hospital services and the use of questionnaires for its measurement. 相似文献
10.