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   44052篇
  免费   4130篇
  国内免费   66篇
耳鼻咽喉   412篇
儿科学   1411篇
妇产科学   1067篇
基础医学   5430篇
口腔科学   851篇
临床医学   4723篇
内科学   8985篇
皮肤病学   549篇
神经病学   4166篇
特种医学   1535篇
外国民族医学   3篇
外科学   6453篇
综合类   888篇
一般理论   55篇
预防医学   4799篇
眼科学   758篇
药学   3027篇
中国医学   56篇
肿瘤学   3080篇
  2021年   623篇
  2020年   400篇
  2019年   787篇
  2018年   878篇
  2017年   598篇
  2016年   632篇
  2015年   740篇
  2014年   1128篇
  2013年   1697篇
  2012年   2345篇
  2011年   2398篇
  2010年   1406篇
  2009年   1254篇
  2008年   2218篇
  2007年   2402篇
  2006年   2326篇
  2005年   2265篇
  2004年   2140篇
  2003年   2050篇
  2002年   1959篇
  2001年   1074篇
  2000年   1125篇
  1999年   990篇
  1998年   489篇
  1997年   371篇
  1996年   413篇
  1995年   453篇
  1994年   388篇
  1993年   365篇
  1992年   775篇
  1991年   706篇
  1990年   683篇
  1989年   699篇
  1988年   598篇
  1987年   596篇
  1986年   591篇
  1985年   576篇
  1984年   504篇
  1983年   451篇
  1982年   347篇
  1981年   339篇
  1980年   270篇
  1979年   451篇
  1978年   352篇
  1976年   268篇
  1975年   276篇
  1974年   291篇
  1973年   333篇
  1972年   306篇
  1971年   273篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
The continued discovery and development of adjuvants for vaccine formulation are important to safely increase potency and/or reduce the antigen doses of existing vaccines and tailor the adaptive immune response to newly developed vaccines. Adjuplex is a novel adjuvant platform based on a purified lecithin and carbomer homopolymer. Here, we analyzed the adjuvant activity of Adjuplex in mice for the soluble hemagglutinin (HA) glycoprotein of influenza A virus. The titration of Adjuplex revealed an optimal dose of 1% for immunogenicity, eliciting high titers of HA-specific IgG but inducing no significant weight loss. At this dose, Adjuplex completely protected mice from an otherwise lethal influenza virus challenge and was at least as effective as the adjuvants monophosphoryl lipid A (MPL) and alum in preventing disease. Adjuplex elicited balanced Th1-/Th2-type immune responses with accompanying cytokines and triggered antigen-specific CD8+ T-cell proliferation. The use of the peritoneal inflammation model revealed that Adjuplex recruited dendritic cells (DCs), monocytes, and neutrophils in the context of innate cytokine and chemokine secretion. Adjuplex neither triggered classical maturation of DCs nor activated a pathogen recognition receptor (PRR)-expressing NF-κB reporter cell line, suggesting a mechanism of action different from that reported for classical pathogen-associated molecular pattern (PAMP)-activated innate immunity. Taken together, these data reveal Adjuplex to be a potent and well-tolerated adjuvant with application for subunit vaccines.  相似文献   
62.
63.
As a fundamental aspect of the human experience, sexuality is experienced at every stage in the life span. Sexual values, behaviors, and health are important components of individual and family well-being. Educating about such a fundamental aspect of life is both obvious and crucial. In this article, we consider the potential of sexuality education in the field and profession of family life education (FLE). We critique sexuality education in the United States and the marginal place of human sexuality in the FLE field. We then offer recommendations for incorporating life span, socioecological, family systems, and intersectionality perspectives into sexuality education, and recommendations for FLE and sexuality education research and practice. We argue that educating about sexuality in the context of FLE—and activating the profession of FLE for sexuality education—will strategically advance sexuality education, sexual health, and the field of FLE.  相似文献   
64.
65.
Heart disease continues to be the leading cause of death in the United States, with approximately 805 000 cumulative deaths from myocardial infarctions (MI) from 2005 to 2014. Gender and racial/ethnic disparities in MI diagnoses are becoming more evident in quality review audits. Although recent changes in diagnostic codes provided an improved framework, clinically distinguishing types of MI remains a challenge. MI misdiagnoses and health disparities contribute to adverse outcomes in cardiac medicine. We conducted a literature review of relevant biomedical sources related to the classification of MI and disparities in cardiovascular care and outcomes. From the studies analyzed, African Americans and women have higher rates of mortality from MI, are more probably to be younger and present with other comorbidities and are less probably to receive novel therapies with respect to type of MI. As high-sensitivity troponin assays are adopted in the United States, implementation should account for how race and sex differences have been demonstrated in the reference range and diagnostic threshold of the newer assays. More research is needed to assess how the complexity of health disparities contributes to adverse cardiovascular outcomes. Creating dedicated medical quality teams (physicians, nurses, clinical documentation improvement specialists, and medical coders) and incorporating a plan-do-check-adjust quality improvement model are strategies that could potentially help better define and diagnose MI, reduce financial burdens due to MI misdiagnoses, reduce cardiovascular-related health disparities, and ultimately improve and save lives.  相似文献   
66.
Neurocritical Care - The objective of this study was to compare the relative number of complications from peripherally inserted central venous catheters (PICC) and centrally inserted central venous...  相似文献   
67.
68.
69.
70.
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