全文获取类型
收费全文 | 959096篇 |
免费 | 59681篇 |
国内免费 | 1091篇 |
专业分类
耳鼻咽喉 | 12632篇 |
儿科学 | 31669篇 |
妇产科学 | 25032篇 |
基础医学 | 157739篇 |
口腔科学 | 25324篇 |
临床医学 | 83884篇 |
内科学 | 177141篇 |
皮肤病学 | 22463篇 |
神经病学 | 66986篇 |
特种医学 | 35249篇 |
外国民族医学 | 116篇 |
外科学 | 142478篇 |
综合类 | 15690篇 |
现状与发展 | 2篇 |
一般理论 | 219篇 |
预防医学 | 71530篇 |
眼科学 | 22606篇 |
药学 | 74445篇 |
1篇 | |
中国医学 | 2016篇 |
肿瘤学 | 52646篇 |
出版年
2018年 | 9926篇 |
2016年 | 8286篇 |
2015年 | 9224篇 |
2014年 | 12479篇 |
2013年 | 18974篇 |
2012年 | 26805篇 |
2011年 | 29340篇 |
2010年 | 17056篇 |
2009年 | 15738篇 |
2008年 | 27537篇 |
2007年 | 29891篇 |
2006年 | 29690篇 |
2005年 | 28329篇 |
2004年 | 27674篇 |
2003年 | 26604篇 |
2002年 | 25872篇 |
2001年 | 43327篇 |
2000年 | 44766篇 |
1999年 | 36853篇 |
1998年 | 9969篇 |
1997年 | 8531篇 |
1996年 | 8838篇 |
1995年 | 8210篇 |
1994年 | 7517篇 |
1992年 | 27776篇 |
1991年 | 28983篇 |
1990年 | 29111篇 |
1989年 | 28277篇 |
1988年 | 25976篇 |
1987年 | 25733篇 |
1986年 | 24150篇 |
1985年 | 23124篇 |
1984年 | 17253篇 |
1983年 | 14693篇 |
1982年 | 8036篇 |
1981年 | 7343篇 |
1979年 | 16680篇 |
1978年 | 12001篇 |
1977年 | 9909篇 |
1976年 | 9959篇 |
1975年 | 11680篇 |
1974年 | 13495篇 |
1973年 | 12973篇 |
1972年 | 12204篇 |
1971年 | 11741篇 |
1970年 | 10929篇 |
1969年 | 10364篇 |
1968年 | 9781篇 |
1967年 | 8770篇 |
1966年 | 7826篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
101.
I. D. Petrova V. S. Petrov S. V. Seregin E. M. Malkova 《Molecular Genetics, Microbiology and Virology》2015,30(4):186-191
This paper presents an analysis of samples from 75 patients for the presence of rubella virus, viral RNA, and specific antibodies. For all samples, RNA detection was higher than virus isolation. It was found that it was not possible to isolate rubella virus in every sixth clinical sample containing the viral RNA. Primary structures of the site (from the 8072nd to 8291st nucleotide) of the rubella virus genome from 14 samples were determined. This paper shows that all the samples of rubella virus belong to the first genotype, subgroups 1h, and very likely to subgroups 1a and 1F. For the first time, the circulation of rubella virus of the genotype has been shown both prior to the start of mass vaccination in Western Siberia and after. 相似文献
102.
103.
104.
C. Banella M. Ginevrino G. Catalano E. Fabiani G. Falconi M. Divona P. Curzi P. Panetta M.T. Voso N.I. Noguera 《Hematology/oncology and stem cell therapy》2021,14(2):163-168
FGFR–TACC, found in different tumor types, is characterized by the fusion of a member of fibroblast grown factor receptor (FGFR) tyrosine kinase (TK) family to a member of the transforming acidic coiled-coil (TACC) proteins. Because chromosome numerical alterations, hallmarks of FGFR–TACC fusions are present in many hematological disorders and there are no data on the prevalence, we studied a series of patients with acute myeloid leukemia and myelodysplastic syndrome who presented numerical alterations using cytogenetic traditional analysis. None of the analyzed samples showed FGFR3–TACC3 gene fusion, so screening for this mutation at diagnosis is not recommended. 相似文献
105.
106.
107.
Objective:To study the effect of oral administration of dimethyl dimethoxy biphenyl dicarboxylate(DDB) on adjusting angiogeneic/inflammatory mediators and ameliorating the pathology of bones in rats with collagen-induced arthritis(CIA).Methods:Wistar rat model of CIA was set up using bovine collagen type Ⅱ.Fifty rats were divided into five groups randomly:normal,CIA model,DDB treatment,methotrexate(MTX) treatment,and combined DDB+MTX treatment.Ankle joints of rats were imaged with digital X-ray machine to show the destruction of joints.Fore and hind paw and knee joints were removed above the ankle joint then processed for haematoxylin and eosin staining.Plasma levels of vascular endothelial growth factor(VEGF),platelet derived growth factor,interleukin-8(IL-8),IL-4,tumor necrosis factor α(TNF-α),and cyclooxygenase-2(COX-2) were quantified by enzyme-linked immunosorbent assay.Nitric oxide levels were detected by Griess reagent.Results:Compared with the CIA model group,a remarkable reduction in various angiogenic(VEGF and IL-8) and inflammatory mediators(TNF-α,IL-4 and COX-2) after treatment with DDB either alone or combined with MTX(P0.05 or P0.01).Histopathological and X-ray findings were confirmatory to the observed DDB anti-arthritic effect.The DDB-treated group showed amelioration in signs of arthritis which appeared essentially similar to normal.Conclusion:Our data shed light on the therapeutic efficacy of DDB in experimental rheumatoid arthritis(RA) compared with a choice drug(MTX) and it may be offered as a second-line drug in the treatment of RA. 相似文献
108.
109.
110.