首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   42664篇
  免费   4138篇
  国内免费   3079篇
耳鼻咽喉   338篇
儿科学   631篇
妇产科学   458篇
基础医学   4078篇
口腔科学   735篇
临床医学   5941篇
内科学   5418篇
皮肤病学   329篇
神经病学   1698篇
特种医学   1436篇
外国民族医学   17篇
外科学   3447篇
综合类   9264篇
现状与发展   24篇
一般理论   1篇
预防医学   3467篇
眼科学   914篇
药学   5457篇
  55篇
中国医学   3185篇
肿瘤学   2988篇
  2024年   142篇
  2023年   604篇
  2022年   1429篇
  2021年   1960篇
  2020年   1534篇
  2019年   1241篇
  2018年   1245篇
  2017年   1404篇
  2016年   1187篇
  2015年   1932篇
  2014年   2454篇
  2013年   2519篇
  2012年   3767篇
  2011年   3930篇
  2010年   2727篇
  2009年   2307篇
  2008年   2682篇
  2007年   2675篇
  2006年   2519篇
  2005年   2322篇
  2004年   1605篇
  2003年   1514篇
  2002年   1232篇
  2001年   905篇
  2000年   825篇
  1999年   719篇
  1998年   432篇
  1997年   417篇
  1996年   280篇
  1995年   281篇
  1994年   219篇
  1993年   137篇
  1992年   120篇
  1991年   115篇
  1990年   117篇
  1989年   81篇
  1988年   71篇
  1987年   43篇
  1986年   64篇
  1985年   49篇
  1984年   29篇
  1983年   16篇
  1982年   6篇
  1981年   8篇
  1980年   5篇
  1979年   9篇
  1976年   1篇
  1970年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Zedoary tumeric (Curcumae Rhizoma, Ezhu in Chinese) has a long history of application and has great potential in the treatment of liver cancer. The anti liver cancer effect of zedoary tumeric depends on the combined action of multiple pharmacodynamic substances. In order to clarify the specific mechanism of zedoary tumeric against liver cancer, this paper first analyzes the mechanism of its single pharmacodynamic substance against liver cancer, and then verifies the joint anti liver cancer mechanism of its "pharmacodynamic group". By searching the research on the anti hepatoma effect of active components of zedoary tumeric in recent years, we found that pharmacodynamic substances, including curcumol, zedoarondiol, curcumenol, curzerenone, curdione, curcumin, germacrone, β-elemene, can act on multi-target and multi-channel to play an anti hepatoma role. For example, curcumin can regulate miR, GLO1, CD133, VEGF, YAP, LIN28B, GPR81, HCAR-1, P53 and PI3K/Akt/mTOR, HSP70/TLR4 and NF-κB. Wnt/TGF/EMT, Nrf2/Keap1, JAK/STAT and other pathways play an anti hepatoma role. Network pharmacological analysis showed that the core targets of the "pharmacodynamic group" for anti-life cancer are AKT1, EGFR, MAPK8, etc, and the core pathways are neuroactive live receiver interaction, nitrogen metabolism, HIF-1 signaling pathway, etc. At the same time, by comparing and analyzing the relationship between the specific mechanisms of pharmacodynamic substance and "pharmacodynamic group", it is found that they have great reference significance in target, pathway, biological function, determination of core pharmacodynamic components, formation of core target protein interaction, in-depth research of single pharmacodynamic substance, increasing curative effect and so on. By analyzing the internal mechanism of zedoary tumeric pharmacodynamic substance and "pharmacodynamic group" in the treatment of liver cancer, this paper intends to provide some ideas and references for the deeper pharmacological research of zedoary tumeric and the relationship between pharmacodynamic substance and "pharmacodynamic group".  相似文献   
4.
瞬时受体电位亚家族V成员6 (Transient Receptor Potential Channel Subfamily V Member 6, TRPV6) 是一种钙离子高度选择性离子通道,在多种组织中均有表达,控制细胞顶端钙离子的进入,在维持钙稳态中发挥重要作用。TRPV6功能异常会影响体内钙稳态,进而引发新生儿骨骼发育异常、甲状旁腺功能亢进、骨与软骨代谢异常、肾结石和高尿钙症、 以及炎症性肠病和慢性胰腺炎等多种疾病。近年来研究也表明,TRPV6的上调与多种肿瘤的侵袭性增加有关,具有作为肿瘤检测的标志物以及治疗靶点的潜力。本综述将聚焦于TRPV6与其在相关疾病中发挥的作用,旨在为TRPV6作为药物靶点实现临床转化提供理论依据。  相似文献   
5.
Clinical and Experimental Medicine - Recently, the use of novel targeted drugs significantly improved the overall response rate (ORR) and survival of patients with relapsed/refractory chronic...  相似文献   
6.
7.
8.
BackgroundIn the field of transplantation, inducing immune tolerance in recipients is of great importance. Blocking co-stimulatory molecule using anti-CD28 antibody could induce tolerance in a rat kidney transplantation model. Myeloid-derived suppressor cells (MDSCs) reveals strong immune suppressive abilities in kidney transplantation. Here we analyzed key genes of MDSCs leading to transplant tolerance in this model.MethodsMicroarray data of rat gene expression profiles under accession number GSE28545 in the Gene Expression Omnibus (GEO) database were analyzed. Running the LIMMA package in R language, the differentially expressed genes (DEGs) were found. Enrichment analysis of the DEGs was conducted in the Database for Annotation, Visualization and Integrated Discovery (DAVID) database to explore gene ontology (GO) annotation and their Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways. Their protein-protein interactions (PPIs) were provided by STRING database and was visualized in Cytoscape. Hub genes were carried out by CytoHubba.ResultsThree hundred and thirty-eight DEGs were exported, including 27 upregulated and 311 downregulated genes. The functions and KEGG pathways of the DEGs were assessed and the PPI network was constructed based on the string interactions of the DEGs. The network was visualized in Cytoscape; the entire PPI network consisted of 192 nodes and 469 edges. Zap70, Cdc42, Stat1, Stat4, Ccl5 and Cxcr3 were among the hub genes.ConclusionsThese key genes, corresponding proteins and their functions may provide valuable background for both basic and clinical research and could be the direction of future studies in immune tolerance, especially those examining immunocyte-induced tolerance.  相似文献   
9.
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号