全文获取类型
收费全文 | 4882189篇 |
免费 | 393332篇 |
国内免费 | 15430篇 |
专业分类
耳鼻咽喉 | 69191篇 |
儿科学 | 157566篇 |
妇产科学 | 130183篇 |
基础医学 | 731266篇 |
口腔科学 | 137443篇 |
临床医学 | 449951篇 |
内科学 | 887664篇 |
皮肤病学 | 117107篇 |
神经病学 | 408703篇 |
特种医学 | 193200篇 |
外国民族医学 | 968篇 |
外科学 | 737386篇 |
综合类 | 138682篇 |
现状与发展 | 24篇 |
一般理论 | 2810篇 |
预防医学 | 406247篇 |
眼科学 | 115430篇 |
药学 | 350640篇 |
21篇 | |
中国医学 | 12620篇 |
肿瘤学 | 243849篇 |
出版年
2021年 | 51333篇 |
2019年 | 59477篇 |
2018年 | 76333篇 |
2017年 | 58205篇 |
2016年 | 64593篇 |
2015年 | 77044篇 |
2014年 | 111633篇 |
2013年 | 177407篇 |
2012年 | 140930篇 |
2011年 | 148884篇 |
2010年 | 131253篇 |
2009年 | 131206篇 |
2008年 | 134071篇 |
2007年 | 143898篇 |
2006年 | 151408篇 |
2005年 | 145587篇 |
2004年 | 146331篇 |
2003年 | 135930篇 |
2002年 | 124183篇 |
2001年 | 196570篇 |
2000年 | 193118篇 |
1999年 | 171913篇 |
1998年 | 70070篇 |
1997年 | 64756篇 |
1996年 | 62866篇 |
1995年 | 63780篇 |
1994年 | 57724篇 |
1993年 | 53529篇 |
1992年 | 128148篇 |
1991年 | 123284篇 |
1990年 | 118652篇 |
1989年 | 115164篇 |
1988年 | 106002篇 |
1987年 | 104127篇 |
1986年 | 98221篇 |
1985年 | 95655篇 |
1984年 | 77469篇 |
1983年 | 68032篇 |
1982年 | 51169篇 |
1981年 | 47262篇 |
1980年 | 44261篇 |
1979年 | 67324篇 |
1978年 | 52706篇 |
1977年 | 46169篇 |
1976年 | 42862篇 |
1975年 | 43744篇 |
1974年 | 48754篇 |
1973年 | 46734篇 |
1972年 | 43832篇 |
1971年 | 40502篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Breast Cancer Research and Treatment - Breast cancer survivors are often prescribed medications for at least 5 years to reduce recurrence risk, yet some forego this treatment due to cost.... 相似文献
42.
Bashir A. Fomda Nazima Abdullah Yawar B. Mir Gulnaz Bashir Asiya Khan Syed M. Qadri Sonaullah Shah 《Indian journal of medical microbiology》2022,40(2):294-298
PurposeThe clinical manifestations of rickettsial diseases mimic other endemic infections with similar presentations thus posing a serious challenge to clinicians for their diagnosis. For the diagnosis of rickettsial disease serological tests like Weil Felix, ELISA and IFA are used. There are limited studies that have evaluated different serological tests for the diagnosis of rickettsial diseases. Therefore, the present study was undertaken to evaluate the ELISA and Weil Felix test for the diagnosis of rickettsial diseases prevalent in this region.MethodsSamples from 281 patients clinically suspected of rickettsial diseases were tested for spotted fever group (SFG), typhus group (TG) and scrub typhus group (STG) by Weil Felix, ELISA and IFA was taken as the gold standard. Baseline titers and cut-off ODs were calculated by taking samples from healthy blood donors.ResultsThe sensitivity, specificity, positive and negative predictive value of Weil Felix test ranged from 30% to 44%, 83.46%–97.86%, 9%–77%, 92–96% respectively. The sensitivity and specificity, positive and negative predictive value of ELISA ranged from 80.77% to 96.15%, 96.33%–98.43%, 70.21%–88.64%, 92.89%–99.60% respectively. Maximum cross-reactions were observed between SFG and STG by the Weil Felix test and between STG and TG by ELISA.ConclusionsELISA was found to be sensitive and specific for the diagnosis of rickettsial diseases. It is easy to perform, does not require a technical expert for result interpretation and a large number of samples can be processed at a time. 相似文献
43.
Gordon K. B. Saburov V. O. Koryakin S. N. Gulidov I. A. Fatkhudinov T. Kh. Arutyunyan I. V. Kaprin A. D. Solov’ev A. N. 《Bulletin of experimental biology and medicine》2022,173(2):281-285
Bulletin of Experimental Biology and Medicine - Fast neutron therapy, which previously has demonstrated effective results, but along with a large number of complications, can again be considered a... 相似文献
44.
Zyuz’kov G. N. Zhdanov V. V. Miroshnichenko L. A. Polyakova T. Yu. Stavrova L. A. Simanina E. V. Minakova M. Yu. Agafonov V. I. Churin A. A. 《Bulletin of experimental biology and medicine》2022,173(5):615-619
Bulletin of Experimental Biology and Medicine - The psychopharmacological effects of a stimulator of functions of progenitor cells of the nervous tissue STAT3 inhibitor (STAT3 Inhibitor XIV, LLL12)... 相似文献
45.
46.
47.
48.
49.
Mursheda Begum Grant Lewison Xiang Wang Philip D. Dunne Tim Maughan Richard Sullivan Mark Lawler 《International journal of cancer. Journal international du cancer》2023,152(3):470-479
The purpose of this study was to provide an evidence base for colorectal cancer research activity that might influence policy, mainly at the national level. Improvements in healthcare delivery have lengthened life expectancy, but within a situation of increased cancer incidence. The disease burden of CRC has risen significantly, particularly in Africa, Asia and Latin America. Research is key to its control and reduction, but few studies have delineated the volume and funding of global research on CRC. We identified research papers in the Web of Science (WoS) from 2007 to 2021, and determined the contributions of the leading countries, the research domains studied, and their sources of funding. We identified 62 716 papers, representing 5.7% of all cancer papers. This percentage was somewhat disproportionate to the disease burden (7.7% in 2015), especially in Eastern Europe. International collaboration increased over the time period in almost all countries except in China. Genetics, surgery and prognosis were the leading research domains. However, research on palliative care and quality-of-life in CRC was lacking. In Western Europe, the main funding source was the charity sector, particularly in the UK, but in most other countries government played the leading role, especially in China and the USA. There was little support from industry. Several Asian countries provided minimal contestable funding, which may have reduced the impact of their CRC research. Certain countries must perform more CRC research overall, especially in domains such as screening, palliative care and quality-of-life. The private-non-profit sector should be an alternative source of support. 相似文献
50.