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   8397篇
  免费   403篇
  国内免费   33篇
耳鼻咽喉   90篇
儿科学   242篇
妇产科学   153篇
基础医学   1300篇
口腔科学   113篇
临床医学   682篇
内科学   1881篇
皮肤病学   253篇
神经病学   1029篇
特种医学   499篇
外科学   1032篇
综合类   68篇
一般理论   1篇
预防医学   302篇
眼科学   275篇
药学   526篇
中国医学   9篇
肿瘤学   378篇
  2022年   86篇
  2021年   152篇
  2020年   84篇
  2019年   135篇
  2018年   164篇
  2017年   135篇
  2016年   142篇
  2015年   183篇
  2014年   249篇
  2013年   322篇
  2012年   516篇
  2011年   496篇
  2010年   316篇
  2009年   278篇
  2008年   457篇
  2007年   524篇
  2006年   517篇
  2005年   506篇
  2004年   482篇
  2003年   489篇
  2002年   442篇
  2001年   93篇
  2000年   61篇
  1999年   64篇
  1998年   102篇
  1997年   97篇
  1996年   66篇
  1995年   59篇
  1994年   67篇
  1993年   52篇
  1992年   59篇
  1991年   57篇
  1990年   44篇
  1989年   50篇
  1988年   49篇
  1987年   33篇
  1986年   44篇
  1985年   40篇
  1984年   28篇
  1983年   36篇
  1982年   24篇
  1981年   30篇
  1980年   32篇
  1979年   29篇
  1978年   27篇
  1937年   24篇
  1935年   27篇
  1931年   28篇
  1930年   26篇
  1925年   23篇
排序方式: 共有8833条查询结果,搜索用时 31 毫秒
1.
2.
Clinical Oral Investigations - The aim of this study was the analysis of WNT10A variants in seven families of probands with various forms of tooth agenesis and self-reported family history of...  相似文献   
3.
4.
Recent focus on the neonatal intestinal microbiome has advanced our knowledge of the complex interplay between the intestinal barrier, the developing immune system, and commensal and pathogenic organisms. Despite the parallel role of the infant skin in serving as both a barrier and an interface for priming the immune system, large gaps exist in our understanding of the infantile cutaneous microbiome. The skin microbiome changes and matures throughout infancy, becoming more diverse and developing the site specificity known to exist in adults. Delivery method initially determines the composition of the cutaneous microbiome, though this impact appears transient. Cutaneous microbes play a critical role in immune system development, particularly during the neonatal period, and microbes and immune cells have closely intertwined, reciprocal effects. The unique structure of newborn skin influences cutaneous microbial colonization and the development of dermatologic pathology. The development of the infantile skin barrier and cutaneous microbiome contributes to future skin pathology. Atopic dermatitis flares and seborrheic dermatitis have been linked to dysbiosis, while erythema toxicum neonatorum is an immune response to the establishment of normal bacterial skin flora. Physicians who care for infants should be aware of the impact of the infantile skin microbiome and its role in the development of pathology. A better understanding of the origin and evolution of the skin microbiome will lead to more effective prevention and treatment of pediatric skin disease.  相似文献   
5.
An important part of fundamental research in catalysis is based on theoretical and modeling foundations which are closely connected with studies of single-crystalline catalyst surfaces. These so-called model catalysts are often prepared in the form of epitaxial thin films, and characterized using advanced material characterization techniques. This concept provides the fundamental understanding and the knowledge base needed to tailor the design of new heterogeneous catalysts with improved catalytic properties. The present contribution is devoted to development of a model catalyst system of CeO2 (ceria) on the Cu(111) substrate. We propose ways to experimentally characterize and control important parameters of the model catalyst—the coverage of the ceria layer, the influence of the Cu substrate, and the density of surface defects on ceria, particularly the density of step edges and the density and the ordering of the oxygen vacancies. The large spectrum of controlled parameters makes ceria on Cu(111) an interesting alternative to a more common model system ceria on Ru(0001) that has served numerous catalysis studies, mainly as a support for metal clusters.  相似文献   
6.
7.
8.
9.
10.
J R Torrisi  J Treat  R Zeman  A Dritschilo 《Cancer》1987,60(6):1226-1231
Malignant islet cell tumors are commonly treated with surgical resection. Chemotherapy is reserved for residual, unresectable, or metastatic disease. The role for radiotherapy has not been clearly defined. This article describes three cases of advanced islet cell tumors treated effectively with radiotherapy. This experience, in addition to that from other published reports, suggests that radiotherapy is a useful mode for treating advanced islet cell carcinoma.  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