全文获取类型
收费全文 | 1688篇 |
免费 | 90篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 39篇 |
儿科学 | 73篇 |
妇产科学 | 79篇 |
基础医学 | 102篇 |
口腔科学 | 44篇 |
临床医学 | 115篇 |
内科学 | 392篇 |
皮肤病学 | 43篇 |
神经病学 | 56篇 |
特种医学 | 40篇 |
外国民族医学 | 1篇 |
外科学 | 283篇 |
综合类 | 43篇 |
预防医学 | 86篇 |
眼科学 | 59篇 |
药学 | 207篇 |
中国医学 | 9篇 |
肿瘤学 | 111篇 |
出版年
2023年 | 8篇 |
2022年 | 58篇 |
2021年 | 84篇 |
2020年 | 40篇 |
2019年 | 78篇 |
2018年 | 78篇 |
2017年 | 62篇 |
2016年 | 46篇 |
2015年 | 51篇 |
2014年 | 59篇 |
2013年 | 82篇 |
2012年 | 133篇 |
2011年 | 123篇 |
2010年 | 61篇 |
2009年 | 67篇 |
2008年 | 71篇 |
2007年 | 75篇 |
2006年 | 53篇 |
2005年 | 44篇 |
2004年 | 28篇 |
2003年 | 29篇 |
2002年 | 22篇 |
2001年 | 34篇 |
2000年 | 20篇 |
1999年 | 20篇 |
1998年 | 15篇 |
1997年 | 9篇 |
1996年 | 20篇 |
1995年 | 13篇 |
1994年 | 7篇 |
1992年 | 11篇 |
1991年 | 19篇 |
1990年 | 10篇 |
1989年 | 17篇 |
1988年 | 26篇 |
1987年 | 25篇 |
1986年 | 15篇 |
1985年 | 10篇 |
1984年 | 10篇 |
1983年 | 7篇 |
1979年 | 14篇 |
1978年 | 10篇 |
1977年 | 11篇 |
1976年 | 17篇 |
1975年 | 8篇 |
1974年 | 11篇 |
1973年 | 9篇 |
1972年 | 9篇 |
1967年 | 6篇 |
1966年 | 10篇 |
排序方式: 共有1782条查询结果,搜索用时 359 毫秒
11.
A new molecular diagnostic assay was developed for detection of Tetracapsuloides bryosalmonae the causative agent of proliferative kidney disease (PKD) in salmonid fish using a loop-mediated isothermal amplification method (LAMP). The PKD-LAMP assay amplifies the T. bryosalmonae DNA extracted from infected kidney, under constant temperature of 65°C within 1 h. The required equipment for DNA amplification is only a water bath. The amplification products were detected visually by using SYBR green I dye, which turns green in the presence of amplified products and remains orange in its absence, and by electrophoresis without any difference in the sensitivity of both methods. The developed PKD-LAMP assay demonstrated an exceptionally higher sensitivity than the conventional PCR. PKD-LAMP assay was found to be 100-fold more sensitive than the PCR assay. The developed assay is simple, rapid, cost-effective, specific and highly sensitive. The assay is also characterized by its field applicability, as it does not require the use of sophisticated equipment or skilled personnel. 相似文献
12.
B A Botros D M Watts A K Soliman A W Salib M I Moussa H Mursal C Douglas M Farah 《Journal of medical virology》1989,29(2):79-81
Epidemics of a malaria-like illness affected several thousand residents of the Dam Camp, a refugee camp near Hargeysa in Somalia, during 1985, 1986, and 1987. The disease was characterized by fever, chills, sweats, headache, back and joint pains for as long as 10 days in some patients. Blood smears from acutely ill patients were negative for malaria. Of 28 acute and 10 convalescent sera tested by the indirect fluorescent antibody (IFA) and by the hemagglutination inhibition (HI) tests, all were negative for antibody to Rift Valley fever, Crimean-Congo hemorrhagic fever, Sindbis, Chikungunya, yellow fever, and Zika viruses. However, antibody reactive to dengue 2 virus was detected by the IFA test in 39% (15/38), and 11 of 29 (38%) of the same sera were antibody positive by the HI test. Also, IgG antibody reactive to dengue 2 was demonstrated in 60% (17/28) of the same sera by the enzyme immunoassay (EIA), and 14% (4/28) were positive for IgM antibody. Of ten patients for which acute and convalescent sera were available, two developed four fold or greater rises in antibody titer evidencing infection. These data suggested that dengue virus may have been the cause of the epidemic among the Dam Camp refugees. 相似文献
13.
A. Chiou S. Kaufman R. Beuerman T. Ohta H. Soliman H. Kaufman 《The British journal of ophthalmology》1999,83(2):185-189
AIMS: To report the appearances of cornea guttata and Fuchs' endothelial dystrophy from white light confocal microscopy. METHODS: Seven eyes of four consecutive patients with cornea guttata were prospectively examined. Of the seven eyes, three also had corneal oedema (Fuchs' dystrophy). In vivo white light tandem scanning confocal microscopy was performed in all eyes. Results were compared with non-contact specular microscopy. RESULTS: Specular microscopy was precluded by corneal oedema in one eye. In the remaining six eyes, it demonstrated typical changes including pleomorphism, polymegathism, and the presence of guttae appearing as dark bodies, some with a central bright reflex. In all seven eyes, confocal microscopy revealed the presence of round hyporeflective images with an occasional central highlight at the level of the endothelium. Changes in cell morphology and size were readily appreciated. CONCLUSION: By comparison with specular microscopy, the hyporeflective images with an occasional central highlight seen on confocal microscopy are consistent with the presence of guttae. Confocal microscopy may confirm the diagnosis of cornea guttata and Fuchs' endothelial dystrophy by demonstrating the presence of guttae. This technique is especially valuable in cases of corneal oedema, where specular microscopy may fail to visualise the endothelium. However, specular microscopy should remain the method of choice to evaluate the endothelium, principally because it is easier to use. 相似文献
14.
Accuracy of an automated transthoracic echocardiographic tool for 3D assessment of left heart chamber volumes
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
15.
Atif ElSayed Awad Hanan Hamed Soliman Sabry Abdel Latif Abou Saif Abdel Monem Nooman Darwish Samah Mosaad Asem Ahmed Elfert 《Arab Journal Of Gastroenterology》2012,13(2):77-81
Background and study aimsBleeding internal haemorrhoids are common and used to be treated surgically with too many complications. Endoscopic therapy is trying to take the lead. Sclerotherapy and rubber band ligation are the candidates to replace surgical therapy especially in patients with liver cirrhosis. The aim of this study was to compare endoscopic injection sclerotherapy (EIS) to endoscopic rubber band ligation (EBL) regarding effectiveness and complications in the treatment of bleeding internal haemorrhoids in Egyptian patients with liver cirrhosis.Patients and methodsOne hundred and twenty adult patients with liver cirrhosis and bleeding internal haemorrhoids were randomised into two equal groups; the first treated with EBL using Saeed multiband ligator, and the second with EIS using either ethanolamine oleate 5% or N-butyl cyanoacrylate. All groups were matched as regards age, sex, Child score and pre-procedure Doppler values. Patients were followed up clinically and with abdominal ultrasound/Doppler for 6 months. Endoscopic and endosonography/Doppler was done before and one month after the procedure. Pre and post-procedure data were recorded and analysed.ResultsBoth techniques were highly effective in the control of bleeding from internal haemorrhoids with a low rebleeding [10% in the EBL group and 13.33% in the EIS group] and recurrence [20% in the EBL group 20% in the EIS group] rates. Child score had a positive correlation with rebleeding and recurrence in EIS group only.Pain score and need for analgesia were significantly higher while patient satisfaction was significantly lower in EIS compared to EBL [p < 0.05]. No significant difference between ethanolamine and cyanoacrylate subgroups was found [p > 0.05].ConclusionsBoth EBL and EIS were effective in the treatment of bleeding internal haemorrhoids in patients with liver cirrhosis. EBL had significantly less pain and higher patient satisfaction than EIS. EBL was also safer in patients with advanced cirrhosis. 相似文献
16.
17.
18.
Abdel Allah Hany M. M. Zahran Walid E. El-Masry Samir A. El-Bendary Mahmoud Soliman Ahmed F. 《Clinical and experimental medicine》2022,22(2):257-267
Clinical and Experimental Medicine - Identification of host genetic factors influencing the risk of developing hepatocellular carcinoma (HCC) in patients with chronic hepatitis C virus (HCV)... 相似文献
19.
20.
Repeatability of ectopic beats from 48‐hr ambulatory electrocardiography: The Atherosclerosis Risk in Communities (ARIC) Study
下载免费PDF全文
![点击此处可从《Annals of noninvasive electrocardiology》网站下载免费的PDF全文](/ch/ext_images/free.gif)