全文获取类型
收费全文 | 1391491篇 |
免费 | 98689篇 |
国内免费 | 2181篇 |
专业分类
耳鼻咽喉 | 20338篇 |
儿科学 | 46264篇 |
妇产科学 | 40845篇 |
基础医学 | 203741篇 |
口腔科学 | 38635篇 |
临床医学 | 116930篇 |
内科学 | 270745篇 |
皮肤病学 | 29661篇 |
神经病学 | 110501篇 |
特种医学 | 56490篇 |
外国民族医学 | 390篇 |
外科学 | 217262篇 |
综合类 | 27246篇 |
一般理论 | 334篇 |
预防医学 | 97995篇 |
眼科学 | 32111篇 |
药学 | 106176篇 |
1篇 | |
中国医学 | 2699篇 |
肿瘤学 | 73997篇 |
出版年
2018年 | 13874篇 |
2016年 | 12424篇 |
2015年 | 14292篇 |
2014年 | 18803篇 |
2013年 | 28287篇 |
2012年 | 39709篇 |
2011年 | 41675篇 |
2010年 | 24662篇 |
2009年 | 22870篇 |
2008年 | 40703篇 |
2007年 | 44203篇 |
2006年 | 44816篇 |
2005年 | 44300篇 |
2004年 | 42493篇 |
2003年 | 41485篇 |
2002年 | 40895篇 |
2001年 | 62161篇 |
2000年 | 63573篇 |
1999年 | 53928篇 |
1998年 | 14579篇 |
1997年 | 12944篇 |
1996年 | 12971篇 |
1995年 | 12839篇 |
1994年 | 12231篇 |
1993年 | 11314篇 |
1992年 | 42539篇 |
1991年 | 41943篇 |
1990年 | 41425篇 |
1989年 | 40124篇 |
1988年 | 37298篇 |
1987年 | 36552篇 |
1986年 | 34851篇 |
1985年 | 33264篇 |
1984年 | 24783篇 |
1983年 | 21463篇 |
1982年 | 12809篇 |
1981年 | 11322篇 |
1979年 | 23554篇 |
1978年 | 16529篇 |
1977年 | 14296篇 |
1976年 | 13460篇 |
1975年 | 14938篇 |
1974年 | 17464篇 |
1973年 | 16768篇 |
1972年 | 16043篇 |
1971年 | 14915篇 |
1970年 | 13818篇 |
1969年 | 13303篇 |
1968年 | 12544篇 |
1967年 | 10985篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Mahmut Gümüş MD Chieh-I Chen MPH Cristina Ivanescu PhD Saadettin Kilickap MD Igor Bondarenko MD Mustafa Özgüroğlu MD Miranda Gogishvili MD Haci M. Turk MD Irfan Cicin MD James Harnett PharmD Vera Mastey MS Ulrike Naumann MS Matthew Reaney MS Gerasimos Konidaris MS Medha Sasane PhD Keri J. S. Brady PhD Siyu Li PhD Giuseppe Gullo MD Petra Rietschel MD Ahmet Sezer MD 《Cancer》2023,129(1):118-129
2.
Lykov A. P. Uvarov I. P. Gevorgiz R. G. Zheleznova S. N. 《Bulletin of experimental biology and medicine》2022,172(3):301-304
Bulletin of Experimental Biology and Medicine - We studied the effect of microalgae of various systematic groups added to the ration on the biochemical parameters of blood serum and liver and... 相似文献
3.
4.
5.
6.
Tellapragada Chaitanya Ydsten Karin Andersson Ternhag Anders Giske Christian G. 《European journal of clinical microbiology & infectious diseases》2022,41(7):1093-1098
European Journal of Clinical Microbiology & Infectious Diseases - We investigated the concordance between the Unyvero Hospitalized Pneumonia (HPN) application and quantitative culture for... 相似文献
7.
Moskaleva P. V. Shnayder N. A. Dmitrenko D. V. Shilkina O. S. Neznanov N. G. Nasyrova R. F. 《Neuroscience and behavioral physiology》2022,52(3):462-469
Neuroscience and Behavioral Physiology - The question of the involvement of impairments to the metabolism of melatonin and its precursors (tryptophan and serotonin) in the development of... 相似文献
8.
Andreas Lundin Martin Annborn Ola Borgquist Joachim Düring Johan Undén Christian Rylander 《Acta anaesthesiologica Scandinavica》2023,67(5):655-662
Patients admitted to intensive care after cardiac arrest are at risk of circulatory shock and early mortality due to cardiovascular failure. The aim of this study was to evaluate the ability of the veno-arterial pCO2 difference (∆pCO2; central venous CO2 – arterial CO2) and lactate to predict early mortality in postcardiac arrest patients. This was a pre-planned prospective observational sub-study of the target temperature management 2 trial. The sub-study patients were included at five Swedish sites. Repeated measurements of ∆pCO2 and lactate were conducted at 4, 8, 12, 16, 24, 48, and 72 h after randomization. We assessed the association between each marker and 96-h mortality and their prognostic value for 96-h mortality. One hundred sixty-three patients were included in the analysis. Mortality at 96 h was 17%. During the initial 24 h, there was no difference in ∆pCO2 levels between 96-h survivors and non-survivors. ∆pCO2 measured at 4 h was associated with an increased risk of death within 96 h (adjusted odds ratio: 1.15; 95% confidence interval [CI]: 1.02–1.29; p = .018). Lactate levels were associated with poor outcome over multiple measurements. The area under the receiving operating curve to predict death within 96 h was 0.59 (95% CI: 0.48–0.74) and 0.82 (95% CI: 0.72–0.92) for ∆pCO2 and lactate, respectively. Our results do not support the use of ∆pCO2 to identify patients with early mortality in the postresuscitation phase. In contrast, non-survivors demonstrated higher lactate levels in the initial phase and lactate identified patients with early mortality with moderate accuracy. 相似文献
9.
10.
Zyuz’kov G. N. Zhdanov V. V. Miroshnichenko L. A. Polyakova T. Yu. Stavrova L. A. Simanina E. V. Minakova M. Yu. Agafonov V. I. Churin A. A. 《Bulletin of experimental biology and medicine》2022,173(5):615-619
Bulletin of Experimental Biology and Medicine - The psychopharmacological effects of a stimulator of functions of progenitor cells of the nervous tissue STAT3 inhibitor (STAT3 Inhibitor XIV, LLL12)... 相似文献