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   20374篇
  免费   1944篇
  国内免费   1492篇
耳鼻咽喉   154篇
儿科学   218篇
妇产科学   255篇
基础医学   2370篇
口腔科学   425篇
临床医学   2631篇
内科学   3079篇
皮肤病学   300篇
神经病学   1025篇
特种医学   664篇
外国民族医学   13篇
外科学   2020篇
综合类   3852篇
现状与发展   4篇
一般理论   3篇
预防医学   1318篇
眼科学   488篇
药学   2337篇
  22篇
中国医学   1064篇
肿瘤学   1568篇
  2024年   70篇
  2023年   335篇
  2022年   888篇
  2021年   1072篇
  2020年   789篇
  2019年   712篇
  2018年   698篇
  2017年   706篇
  2016年   652篇
  2015年   926篇
  2014年   1173篇
  2013年   1126篇
  2012年   1588篇
  2011年   1826篇
  2010年   1103篇
  2009年   931篇
  2008年   1133篇
  2007年   1094篇
  2006年   1110篇
  2005年   1039篇
  2004年   718篇
  2003年   639篇
  2002年   587篇
  2001年   403篇
  2000年   374篇
  1999年   423篇
  1998年   255篇
  1997年   250篇
  1996年   160篇
  1995年   178篇
  1994年   125篇
  1993年   98篇
  1992年   97篇
  1991年   89篇
  1990年   92篇
  1989年   61篇
  1988年   54篇
  1987年   36篇
  1986年   50篇
  1985年   49篇
  1984年   32篇
  1983年   18篇
  1982年   7篇
  1981年   9篇
  1980年   3篇
  1979年   11篇
  1977年   5篇
  1976年   8篇
  1975年   2篇
  1922年   2篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
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   
2.
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   
3.
Paraneoplastic pemphigus is a relatively rare but significant acquired autoimmune mucocutaneous disorder that is characterised by diffuse erythema, painful blistering and sores of the skin and mucus membranes. The underlying pathogenesis is believed to be triggered by altered immune system in response to underlying neoplasm. The manifestations can predate, occur at the same time or after the diagnosis of cancer. Associations with gastric cancer have only been reported twice. A 78-year-old lady presented with a month’s history of extensive skin lesions that started off as bullous lesions and biopsy revealed bullous pemphigus. Endoscopy for anemia revealed gastric cancer. This case reinforced the need to consider underlying malignancy in elderly patient with new onset dermatological presentation.  相似文献   
4.
5.
6.
7.
8.
9.
Programmed death ligand 1(PD-L1) mediated immune escape play important roles in the development of cancer. The gene polymorphism of PD-L1, in particular rs4143815 C?>?G, has been associated with the cancer risks, but with conflicting results. Therefore, this meta-analysis was aimed to assess the association between rs4143815 C?>?G and cancer susceptibility. A systematic literature search was performed to select the studies and the pooled odds ratio (OR) with 95% confidence interval (CI) was used to evaluate the strength of association. Eleven eligible studies containing 3711 cases and 3704 controls were enrolled in the meta-analysis. The results suggested that there is a strong association between rs4143815 C?>?G and the cancer risks (G vs. C: OR?=?1.386, 95% CI: 1.132–1.696, p?=?0.002; GG vs. CG?+?CC: OR?=?1.843 95% CI: 1.300–2.613, p?=?0.002; GG?+?CG vs. CC: OR?=?1.280, 95% CI: 1.040–1.576, p?=?0.020). Subgroup analysis based on cancer type suggested that PD-L1 rs4143815 C?>?G might increase the susceptibility to gastric cancer (G vs. C: OR?=?1.842, 95% CI: 1.403–2.418, p?<?0.001) and bladder cancer (G vs. C: OR?=?2.015, 95% CI: 1.556–2.608, p?<?0.001), and genotype GG carriers of PD-L1 rs4143815 C?>?G might have higher risks of HCC (GG vs. CG?+?CC: OR?=?2.226 95% CI: 1.562–3.172, p?<?0.001). PD-L1 rs4143815 C?>?G might confer an increased cancer risk, indicating this SNP may contribute to the pathogenesis of cancer and might be used as a potential biomarker to predict the susceptibility to cancer.  相似文献   
10.
苏州科技城医院坐落于苏州高新区太湖之滨,由苏州高新区政府投资新建,是一所集医疗、科研、康复、预防于一体的三级综合性公立医院。医院占地面积140亩,总建筑面积180000m~2,总投资额16亿,设计床位1200张。医院于2013年9月29日奠基,2014年12月28日主体封顶,2016年4月正式投入使用,比预定日期提前了将近1年!  相似文献   
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