全文获取类型
收费全文 | 1287篇 |
免费 | 53篇 |
国内免费 | 57篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 116篇 |
妇产科学 | 13篇 |
基础医学 | 134篇 |
口腔科学 | 21篇 |
临床医学 | 143篇 |
内科学 | 285篇 |
皮肤病学 | 51篇 |
神经病学 | 34篇 |
特种医学 | 310篇 |
外科学 | 105篇 |
综合类 | 27篇 |
预防医学 | 39篇 |
眼科学 | 5篇 |
药学 | 52篇 |
中国医学 | 2篇 |
肿瘤学 | 59篇 |
出版年
2023年 | 5篇 |
2021年 | 6篇 |
2020年 | 9篇 |
2019年 | 8篇 |
2018年 | 17篇 |
2017年 | 3篇 |
2016年 | 7篇 |
2015年 | 12篇 |
2014年 | 14篇 |
2013年 | 42篇 |
2012年 | 31篇 |
2011年 | 27篇 |
2010年 | 36篇 |
2009年 | 56篇 |
2008年 | 23篇 |
2007年 | 64篇 |
2006年 | 29篇 |
2005年 | 29篇 |
2004年 | 27篇 |
2003年 | 37篇 |
2002年 | 28篇 |
2001年 | 14篇 |
2000年 | 18篇 |
1999年 | 21篇 |
1998年 | 71篇 |
1997年 | 79篇 |
1996年 | 101篇 |
1995年 | 61篇 |
1994年 | 59篇 |
1993年 | 52篇 |
1992年 | 19篇 |
1991年 | 15篇 |
1990年 | 23篇 |
1989年 | 39篇 |
1988年 | 38篇 |
1987年 | 35篇 |
1986年 | 48篇 |
1985年 | 44篇 |
1984年 | 14篇 |
1983年 | 17篇 |
1982年 | 14篇 |
1981年 | 13篇 |
1980年 | 13篇 |
1979年 | 11篇 |
1978年 | 12篇 |
1977年 | 11篇 |
1976年 | 14篇 |
1975年 | 15篇 |
1974年 | 5篇 |
1973年 | 6篇 |
排序方式: 共有1397条查询结果,搜索用时 15 毫秒
1.
2.
3.
JC Jiménez-Mendoza FE Rivera-López MF González-Lara RD Valdez-Echeverría GE Castro-Narro A Tore LF Uscanga-Domínguez C Moctezuma-Velázquez 《Annals of hepatology》2022,27(3):100684
Introduction and ObjectivesThe emergence of SARS-CoV-2, which causes the coronavirus disease (COVID-19) has caused a great impact on healthcare systems worldwide, including hepatitis B and C viruses screening and elimination programs. The high number of COVID-19 hospitalizations represent a great opportunity to screen patients for hepatitis B virus (HBV) and hepatitis C virus (HCV), which was the aim of this study.Material and MethodsCross-sectional, retrospective study performed between April 2020 and 20201 at a referral center in Mexico dedicated to the care of adults with severe/critical COVID-19. We retrieved clinical, demographic, and laboratory results from each patient´s medical records, including antibodies against HCV (anti-HCV), HBV surface antigen (HBsAg), antibodies against the HBV core antigen (anti-HBcAg), and antibodies against HBsAg (anti-HBsAg).ResultsOut of 3620 patients that were admitted to the hospital, 24 (0.66%), 4 (0.11%), and 72 (1.99%) tested positive for anti-HCV, HBsAg, and anti-HBcAg, respectively. Of all seronegative patients, 954 (27%) had undetectable anti-HBsAg and 401 (12%) had anti-HBsAg at protective levels. Blood transfusion was the most relevant risk factor. Only 9.7% of the anti-HBc positive, 25% of the HBsAg positive, and 52% of the anti-HCV positive were aware of their serological status.ConclusionsIn this study we found a prevalence of anti-HCV of 0.66%, HBsAg in 0.11%, and isolated anti-HBcAg in 1.99%. We also found that HBV vaccination coverage has been suboptimal and needs to be reinforced. This study gave us a trustworthy insight of the actual seroprevalence in Mexico, which can help provide feedback to the Hepatitis National Elimination Plan. 相似文献
4.
Objective:To investigate the wound healing properly of Napoleona vogelii leaf extract in folkloric medicine.Methods:Roth sexes of adult albino rats(n=25) were used in this study and another group(n=30) were subjected to acute toxicity test(LD_(50)) of the plant extract.For the LD_(50),three randomized groups of 5 rats were first treated with 10,100,1 000 mg/kg body weight(bw),orally.This w as followed by a second treatment of 1500,3000,and 5 000 mg/kg bw of the leaf extract with continual monitoring of the animals for mortality or non-mortality.Incision wounds(1.3cm) were created on the skin of five groups of 5 rals using surgical blade under anesthesia.The first group was topically treated with petroleum jelly alone,group 2 was topically applied 400 mg/mL w/v of the reference drug,Neobaein,while group 3-5 were topically treated with 5-50 mg/mL w/v of the plant extract,respectively.Results:The percentage yield of the extract was 49.80%w/w dry matter.The phytochemical analysis revealed several bioactive constituents including glycosides,tannins,alkaloids,perpenoids.saponins,steroids,proteins,and carbohydrates.The LD_(50) was beyond our experimental limit and was not determined.Increased concentrations(5,20,and 50mg/mL w/v) of the extract had significant(ANOVA,P0.05) healing effect on the incision wounds giving rise to 125%-140% while treatmentawith Neobacin resulted in 150% healing effect on the third treatment regimen compared to the control(100%).Conclusions:These data indicate that Napoleona vogelii leaf extract contains potent bioactive compounds containing wound healing activity,substantiating its use as a wound healer in folkloric medicine. 相似文献
5.
A Mocroft B Neesgard R Zangerle A Rieger A Castagna V Spagnuolo A Antinori FC Lampe M Youle JJ Vehreschild C Mussini V Borghi J Begovac C Duvivier HF Gunthard A Rauch J Tiraboschi N Chkhartishvili N Bolokadze F Wit JC Wasmuth S De Wit C Necsoi C Pradier V Svedhem C Stephan K Petoumenos H Garges F Rogatto L Peters L Ryom 《HIV medicine》2020,21(9):599-606
6.
7.
8.
9.
10.
Nynke D Scherpbier-de Haan Gerald MM Vervoort Chris van Weel Jozé CC Braspenning Jan Mulder Jack FM Wetzels Wim JC de Grauw 《The British journal of general practice》2013,63(617):e798-e806