全文获取类型
收费全文 | 27266篇 |
免费 | 1820篇 |
国内免费 | 117篇 |
专业分类
耳鼻咽喉 | 341篇 |
儿科学 | 576篇 |
妇产科学 | 510篇 |
基础医学 | 3970篇 |
口腔科学 | 400篇 |
临床医学 | 2488篇 |
内科学 | 6307篇 |
皮肤病学 | 497篇 |
神经病学 | 2969篇 |
特种医学 | 1017篇 |
外国民族医学 | 5篇 |
外科学 | 4531篇 |
综合类 | 148篇 |
一般理论 | 6篇 |
预防医学 | 1442篇 |
眼科学 | 423篇 |
药学 | 1930篇 |
中国医学 | 96篇 |
肿瘤学 | 1547篇 |
出版年
2023年 | 105篇 |
2022年 | 196篇 |
2021年 | 432篇 |
2020年 | 269篇 |
2019年 | 488篇 |
2018年 | 572篇 |
2017年 | 448篇 |
2016年 | 492篇 |
2015年 | 632篇 |
2014年 | 820篇 |
2013年 | 1111篇 |
2012年 | 1692篇 |
2011年 | 1780篇 |
2010年 | 1135篇 |
2009年 | 1002篇 |
2008年 | 1675篇 |
2007年 | 1765篇 |
2006年 | 1651篇 |
2005年 | 1746篇 |
2004年 | 1650篇 |
2003年 | 1650篇 |
2002年 | 1569篇 |
2001年 | 459篇 |
2000年 | 389篇 |
1999年 | 441篇 |
1998年 | 403篇 |
1997年 | 345篇 |
1996年 | 281篇 |
1995年 | 296篇 |
1994年 | 233篇 |
1993年 | 242篇 |
1992年 | 283篇 |
1991年 | 242篇 |
1990年 | 210篇 |
1989年 | 224篇 |
1988年 | 194篇 |
1987年 | 194篇 |
1986年 | 197篇 |
1985年 | 148篇 |
1984年 | 153篇 |
1983年 | 149篇 |
1982年 | 131篇 |
1981年 | 108篇 |
1980年 | 108篇 |
1979年 | 112篇 |
1978年 | 68篇 |
1977年 | 84篇 |
1975年 | 68篇 |
1974年 | 56篇 |
1973年 | 76篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
Renaud Snanoudj Nassim Kamar Elisabeth Cassuto Sophie Caillard Marie Metzger Pierre Merville Antoine Thierry Isabelle Jollet Philippe Grimbert Dany Anglicheau Marc Hazzan Gabriel Choukroun Bruno Hurault De Ligny Bénedicte Janbon Vincent Vuiblet Anne Devys Yann Le Meur Michel Delahousse Jean-Luc Taupin 《Kidney international》2019,95(6):1471-1485
2.
A Michel C Vons S Hillaire P Icard G Hazebroucq F Kemeny D Houssin D Franco 《European surgical research. Europ?ische chirurgische Forschung. Recherches chirurgicales européennes》1990,22(5):249-255
The efficiency of Eurocollins or modified University of Wisconsin (UW) solution (MUW) in preserving rat livers was compared. After cold storage with one of the solutions, the livers were transplanted or perfused by collagenase for isolation of hepatocytes. Five of the 6 rats receiving a graft preserved with MUW versus none of the 6 rat receiving a graft preserved with Eurocollins solution survived 24 h or more. A significantly greater number of hepatocytes were isolated from livers preserved with MUW than from livers preserved with Eurocollins solution. This suggests a better reperfusion of MUW-preserved livers by collagenase resulting from less endothelial injury. LDH release by cultured hepatocytes, ketone body production and stimulation by glucagon were not significantly different between the two groups. These results confirm the superiority of MUW solution over Eurocollins in preserving liver grafts. They suggest that the advantage of MUW solution results from better protection of vascular endothelium rather than of hepatocytes. 相似文献
3.
Marie-Paule Roth Hlne Coppin Patrick Descoins Jean-Bernard Ruidavets Anne Cambon-Thomsen Michel Clanet 《Journal of neuroimmunology》1991,34(2-3):215-222
The polymorphism at the HLA-DPB1 locus has been characterized in a large number of patients with multiple sclerosis (n = 112) and in healthy controls (n = 115). Both patients and controls lived in the southwest of France (in the Pyrénées Atlantiques) and had similar ethnic background. The typing procedure involved the selective amplification of the second exon of the DPB1 locus by polymerase chain reaction, followed by hybridization of the amplified DNA with 14 sequence-specific oligonucleotide probes. Individual alleles were identified by the pattern of hybridization of the different probes. The distribution of the DPB1 alleles was not significantly different in multiple sclerosis patients and controls (p = 0.11). This does not corroborate the reported association of multiple sclerosis with the primed lymphocyte typing (PLT)-defined DPw4 specificity and is not in favour of a role played by polymorphic residues of the DP molecule in susceptibility to multiple sclerosis. 相似文献
4.
5.
6.
Aaron M Kipp Jennifer A Lehman Richard A Bowen Patricia E Fox Michael R Stephens Kaci Klenk Nicholas Komar Michel L Bunning 《The American journal of tropical medicine and hygiene》2006,75(4):688-690
To better understand the potential environmental health risk presented by West Nile virus (WNV)-contaminated feces, we quantified the amount of WNV present in the feces of experimentally infected American crows (Corvus brachyrhynchos) and fish crows (Corvus ossifragus). Peak fecal titers ranged from 10(3.5) to 10(8.8) plaque-forming units (PFU)/g for 10 American crows and from 10(2.3) to 10(6.4) PFU/g for 10 fish crows. The presence of infectious WNV in bird feces indicates a potential for direct transmission of WNV. Thus, handlers of sick or dead birds should take appropriate precautions to avoid exposure to fecal material. 相似文献
7.
8.
C Lagarde 《Archiv fuer geschwulstforschung》1989,59(4):299-300
9.
10.
目的评估十二指肠-空肠导管(Endoluminal Duodeno-Jejunal Tube,EDJT)在活体猪实验动物模型中减缓体重增加的可行性,及其在中短期生存中的安全性。方法本项研究共用8只45kg重的Yorkshire猪,其中3只置入180emEDJT,1只置入360cm EDJT,另4只猪作为对照组。切开十二指肠,将EDJT导管缝合固定在十二指肠近Vater壶腹起始处。结果评估全部猪的不适反应和体重,每日一次,共7周,未发现严重并发症发生。术后7周3组动物的平均体重变化百分率:对照组、180cm组和360cm组分别是22.5%,6%和-2.8%。EDJT组(180cm组、360cm组)体重增加明显减慢,与对照组相比,有统计学意义(P=0.05)。结论EDJT可以安全使用,无肠梗阻、肠套叠或胰腺炎等并发症发生。EDJT可明显减缓体重增加。 相似文献