全文获取类型
收费全文 | 225789篇 |
免费 | 4482篇 |
国内免费 | 263篇 |
专业分类
耳鼻咽喉 | 1634篇 |
儿科学 | 8464篇 |
妇产科学 | 4335篇 |
基础医学 | 24148篇 |
口腔科学 | 2308篇 |
临床医学 | 17249篇 |
内科学 | 42259篇 |
皮肤病学 | 1818篇 |
神经病学 | 21971篇 |
特种医学 | 9901篇 |
外科学 | 32804篇 |
综合类 | 2601篇 |
现状与发展 | 1篇 |
一般理论 | 43篇 |
预防医学 | 22738篇 |
眼科学 | 3574篇 |
药学 | 13320篇 |
中国医学 | 759篇 |
肿瘤学 | 20607篇 |
出版年
2024年 | 92篇 |
2023年 | 682篇 |
2022年 | 1441篇 |
2021年 | 2429篇 |
2020年 | 1399篇 |
2019年 | 1797篇 |
2018年 | 23542篇 |
2017年 | 18645篇 |
2016年 | 20995篇 |
2015年 | 2751篇 |
2014年 | 3221篇 |
2013年 | 3804篇 |
2012年 | 11328篇 |
2011年 | 25244篇 |
2010年 | 20983篇 |
2009年 | 13396篇 |
2008年 | 22674篇 |
2007年 | 24828篇 |
2006年 | 3545篇 |
2005年 | 4885篇 |
2004年 | 5889篇 |
2003年 | 6574篇 |
2002年 | 4506篇 |
2001年 | 490篇 |
2000年 | 575篇 |
1999年 | 398篇 |
1998年 | 525篇 |
1997年 | 480篇 |
1996年 | 276篇 |
1995年 | 279篇 |
1994年 | 274篇 |
1993年 | 197篇 |
1992年 | 131篇 |
1991年 | 164篇 |
1990年 | 183篇 |
1989年 | 149篇 |
1988年 | 124篇 |
1987年 | 101篇 |
1986年 | 79篇 |
1985年 | 88篇 |
1984年 | 101篇 |
1983年 | 87篇 |
1982年 | 102篇 |
1981年 | 66篇 |
1980年 | 100篇 |
1978年 | 41篇 |
1938年 | 63篇 |
1934年 | 43篇 |
1932年 | 60篇 |
1930年 | 54篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
911.
Alison O. Jordan Louise R. Cohen Graham Harriman Paul A. Teixeira Jacqueline Cruzado-Quinones Homer Venters 《AIDS and behavior》2013,17(2):212-219
New York City (NYC) jails are the epicenter of an epidemic that overwhelmingly affects Black and Hispanic men and offer a significant opportunity for public health intervention. The NYC Department of Health and Mental Hygiene instituted population based approaches to identify the HIV-infected, initiate discharge planning at jail admission, and facilitate post-release linkages to primary care. Using a caring and supportive ‘warm transitions’ approach, transitional care services are integral to continuity of care. Since 2010, over three-quarters of known HIV-infected inmates admitted to jails received discharge plans; 74 % of those released were linked to primary care. The EnhanceLink initiative’s new Health Liaison, a lynchpin role, facilitated 250 court-led placements in medical alternatives to incarceration. Transitional care coordination programs are critical to facilitate continuity of care for people with chronic health conditions including the HIV-infected returning home from jail and for the public health of the communities to which they return. 相似文献
912.
John Imrie Graeme Hoddinott Sebastian Fuller Stephen Oliver Marie-Louise Newell 《AIDS and behavior》2013,17(1):70-76
Research into HIV and men who have sex with men’s (MSM) health in South Africa has been largely confined to the metropolitan centres. Only two studies were located making reference to MSM in rural contexts or same-sex behaviors among men in the same. There is growing recognition in South Africa that MSM are not only disproportionately affected by HIV and have been underserved by the country’s national response, but that they contribute significantly to sustaining the high number of new infections recorded each year. We argue that to meet the objectives of the country’s national strategic plan for HIV, STI and TB it is important we know how these behaviours may be contributing to the sustained rural HIV epidemic in the youngest age groups and determine what constitutes appropriate and feasible programmatic response that can be implemented in the country’s public sector health services. 相似文献
913.
914.
915.
Anna R. Garbuglia Paola Scognamiglio Nicola Petrosillo Claudio Maria Mastroianni Pasquale Sordillo Daniele Gentile Patrizia La Scala Enrico Girardi Maria R. Capobianchi 《Emerging infectious diseases》2013,19(1):110-114
During 2011, 5 persons in the area of Lazio, Italy were infected with a monophyletic strain of hepatitis E virus that showed high sequence homology with isolates from swine in China. Detection of this genotype in Italy parallels findings in other countries in Europe, signaling the possible spread of strains new to Western countries. 相似文献
916.
Anna Gustavsson 《Scandinavian journal of occupational therapy》2013,20(3):138-143
The purpose of this study was to explore relationships between experienced health, sense of coherence, coping resources, and life satisfaction in individuals living with heart failure. Twenty-two patients--12 men and 10 women--were included in the study. All subjects were admitted to a eight-week programme of aerobic training. Four questionnaires were used: the Minnesota Living with Heart Failure Questionnaire (MHLF), the Sense of Coherence scale (SOC), the Coping Resources Inventory (CRI), and the Life Satisfaction Checklist of Fugl-Meyer et al. After the exercise programme the mean score of MLHF was significantly lower as compared with the start of the programme. The majority of the individuals reported that they were satisfied with life as a whole, family life, partnership relation contact with friends, and their psychological state of health. Only one-third were satisfied with their sexual life. A high sense of coherence and coping resources characterized the subjects. There was a slight tendency for those who reported satisfaction with life as whole to report a stronger sense of coherence, a higher degree of coping resources, and a lower degree of symptoms of heart failure. A conclusion was that clinicians should emphasize that patients can continue to remain active and enjoy a reasonable quality of life. 相似文献
917.
Roderick J. Lawrence 《Journal of urban health》2013,90(1):23-36
This article synthesizes diverse official reports, statistics, and scientific papers that present demographic, economic, environmental, and social trends impacting on the health and quality of life of citizens living in European cities. A literature review led to the identification of some key challenges including an aging society, migration flows, inequalities in health, global change, and risk behaviors that should be addressed in order to promote urban health. Other challenges, such as food production and consumption, are also relevant, but not included. Cities that have participated in one or more of the phases of the WHO European Healthy Cities Network have implemented a number of policies, programs, and measures to deal with the challenges discussed in this article. Some contributions are presented to illustrate how health and quality of life in urban areas can be promoted by local authorities. 相似文献
918.
919.
Andrew J. Wiemer Sarah A. Wernimont Thai-duong Cung David A. Bennin Hilary E. Beggs Anna Huttenlocher 《Biochemical pharmacology》2013
The focal adhesion kinase inhibitor, PF-562,271, is currently in clinical development for cancer, however it is not known how PF-562,271 affects T cell function. Here, we demonstrate inhibitory effects of PF-562,271 on the activation of primary human and mouse T cells. PF-562,271 inhibits T cell receptor signaling-induced T cell adhesion to intercellular adhesion molecule-1 and T cell interactions with antigen-presenting cells. An additional focal adhesion kinase inhibitor, PF-573,228, and genetic depletion of focal adhesion kinase also impair T cell conjugation with antigen-presenting cells. PF-562,271 blocks phosphorylation of the signaling molecules zeta chain associate protein of 70 kDa, linker of activated T cells, and extracellular signal-regulated kinase, and impairs T cell proliferation. The effects observed on T cell proliferation cannot solely be attributed to focal adhesion kinase inhibition, as genetic depletion did not alter proliferation. The effect of PF-562,271 on T cell proliferation is not rescued when proximal T cell receptor signaling is bypassed by stimulation with phorbol-12-myristate-13-acetate and ionomycin. Taken together, our findings demonstrate that focal adhesion kinase regulates integrin-mediated T cell adhesion following T cell receptor activation. Moreover, our findings suggest that PF-562,271 may have immunomodulatory effects that could impact its therapeutic applications. 相似文献
920.
Anna Ehrlich Paramita Ray Kathryn E. Luker Elias J. Lolis Gary D. Luker 《Biochemical pharmacology》2013
The chemokine CXCL12 and its shared seven-transmembrane receptors CXCR4 and CXCR7 regulate diseases including cancer, atherosclerosis, autoimmunity, and HIV infection, making these molecules promising drug targets. These molecules also control key processes in normal development and physiology, suggesting the need to selectively modulate CXCR4 and/or CXCR7 functions and signaling to reduce potential complications of long-term therapy. We previously identified two peptides that functioned as allosteric agonists driving CXCR4-dependent chemotaxis, providing key structural information to design a small number of additional peptides to investigate determinants of CXCL12 interactions and signaling through CXCR4 and CXCR7. In the current study, we show that the previously identified peptides only minimally activated CXCR4 signaling through the cytosolic adapter protein β-arrestin 2 and do not initiate signaling to ERK1/2. By comparison, peptides with diverse N-terminal amino acid sequences effectively activated CXCR7 signaling to β-arrestin 2. One peptide, designated as GSLW based on its N-terminal amino acids, activated CXCR7 signaling and potentiated CXCL12-CXCR7 signaling without blocking the scavenger function of CXCR7 to internalize CXCL12. These results advance our understanding of CXCR7 ligand recognition and signaling, and provide structural information to target allosteric binding sites on this receptor as chemical probes and potential therapeutic agents. 相似文献