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   2483844篇
  免费   197929篇
  国内免费   11072篇
耳鼻咽喉   34243篇
儿科学   81772篇
妇产科学   69340篇
基础医学   348774篇
口腔科学   66897篇
临床医学   226931篇
内科学   486747篇
皮肤病学   54953篇
神经病学   196948篇
特种医学   95819篇
外国民族医学   1091篇
外科学   370576篇
综合类   72855篇
现状与发展   24篇
一般理论   797篇
预防医学   193503篇
眼科学   56892篇
药学   184074篇
  117篇
中国医学   11423篇
肿瘤学   139069篇
  2021年   22015篇
  2019年   21681篇
  2018年   29718篇
  2017年   23224篇
  2016年   25137篇
  2015年   29704篇
  2014年   41270篇
  2013年   59126篇
  2012年   81391篇
  2011年   86472篇
  2010年   52328篇
  2009年   48823篇
  2008年   78730篇
  2007年   83255篇
  2006年   83466篇
  2005年   80778篇
  2004年   76343篇
  2003年   72983篇
  2002年   70557篇
  2001年   118551篇
  2000年   121859篇
  1999年   102772篇
  1998年   29307篇
  1997年   26502篇
  1996年   26672篇
  1995年   25342篇
  1994年   23429篇
  1993年   21587篇
  1992年   78503篇
  1991年   75770篇
  1990年   73168篇
  1989年   69693篇
  1988年   64116篇
  1987年   62829篇
  1986年   58637篇
  1985年   56058篇
  1984年   42470篇
  1983年   35842篇
  1982年   21397篇
  1981年   19217篇
  1979年   37800篇
  1978年   26502篇
  1977年   22171篇
  1976年   20876篇
  1975年   22088篇
  1974年   26234篇
  1973年   25319篇
  1972年   23498篇
  1971年   21309篇
  1970年   20246篇
排序方式: 共有10000条查询结果,搜索用时 453 毫秒
1.
Molnár  B.  Aroca  S.  Dobos  A.  Orbán  K.  Szabó  J.  Windisch  P.  Stähli  A.  Sculean  A. 《Clinical oral investigations》2022,26(12):7135-7142
Clinical Oral Investigations - To evaluate t he long-term outcomes following treatment of RT 1 multiple adjacent gingival recessions (MAGR) using the modified coronally advanced tunnel (MCAT) with...  相似文献   
2.
3.
4.

The exercise pressor reflex is a feedback mechanism engaged upon stimulation of mechano- and metabosensitive skeletal muscle afferents. Activation of these afferents elicits a reflex increase in heart rate, blood pressure, and ventilation in an intensity-dependent manner. Consequently, the exercise pressor reflex has been postulated to be one of the principal mediators of the cardiorespiratory responses to exercise. In this updated review, we will discuss classical and recent advancements in our understating of the exercise pressor reflex function in both human and animal models. Particular attention will be paid to the afferent mechanisms and pathways involved during its activation, its effects on different target organs, its potential role in the abnormal cardiovascular response to exercise in diseased states, and the impact of age and biological sex on these responses. Finally, we will highlight some unanswered questions in the literature that may inspire future investigations in the field.

  相似文献   
5.
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   
6.
7.
8.
The coronavirus disease 2019 (COVID-19) pandemic has rapidly created widespread impacts on global health and the economy. Data suggest that women are less susceptible to severe illness. However, sex-disaggregated data are incomplete, leaving room for misinterpretation, and focusing only on biologic sex underestimates the gendered impact of the pandemic on women. This narrative review summarizes what is known about gender disparities during the COVID-19 pandemic and the economic, domestic, and health burdens along with overlapping vulnerabilities related to the pandemic. In addition, this review outlines recommended strategies that advocacy groups, community leaders, and policymakers should implement to mitigate the widening gender disparities related to COVID-19.  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