全文获取类型
收费全文 | 1496篇 |
免费 | 118篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 28篇 |
儿科学 | 38篇 |
妇产科学 | 96篇 |
基础医学 | 161篇 |
口腔科学 | 181篇 |
临床医学 | 97篇 |
内科学 | 269篇 |
皮肤病学 | 23篇 |
神经病学 | 77篇 |
特种医学 | 146篇 |
外科学 | 190篇 |
综合类 | 28篇 |
预防医学 | 128篇 |
眼科学 | 26篇 |
药学 | 63篇 |
中国医学 | 1篇 |
肿瘤学 | 76篇 |
出版年
2021年 | 16篇 |
2020年 | 9篇 |
2019年 | 20篇 |
2018年 | 34篇 |
2017年 | 16篇 |
2016年 | 17篇 |
2015年 | 21篇 |
2014年 | 30篇 |
2013年 | 73篇 |
2012年 | 52篇 |
2011年 | 71篇 |
2010年 | 47篇 |
2009年 | 44篇 |
2008年 | 49篇 |
2007年 | 69篇 |
2006年 | 54篇 |
2005年 | 64篇 |
2004年 | 51篇 |
2003年 | 44篇 |
2002年 | 42篇 |
2001年 | 37篇 |
2000年 | 33篇 |
1999年 | 36篇 |
1998年 | 53篇 |
1997年 | 50篇 |
1996年 | 32篇 |
1995年 | 32篇 |
1994年 | 17篇 |
1993年 | 24篇 |
1992年 | 21篇 |
1991年 | 30篇 |
1990年 | 32篇 |
1989年 | 44篇 |
1988年 | 31篇 |
1987年 | 50篇 |
1986年 | 29篇 |
1985年 | 30篇 |
1984年 | 29篇 |
1983年 | 28篇 |
1982年 | 20篇 |
1981年 | 10篇 |
1980年 | 14篇 |
1979年 | 13篇 |
1977年 | 9篇 |
1976年 | 9篇 |
1975年 | 21篇 |
1974年 | 8篇 |
1971年 | 10篇 |
1970年 | 7篇 |
1966年 | 4篇 |
排序方式: 共有1628条查询结果,搜索用时 15 毫秒
41.
Thomas B. Dodson 《Journal of oral and maxillofacial surgery》2021,79(5):949-950
43.
44.
45.
46.
47.
48.
Ian C. DuncanPatrick W. Kane M.D. Kevin A. LawsonSteven B. Cohen M.D. Michael G. CiccottiChristopher C. Dodson M.D. 《Arthroscopy》2013
Searching the Internet is one of the most popular methods for acquiring information related to health. The Internet offers physicians and patients easy access to a wide range of medical material from anywhere in the world. For many patients, this information helps formulate decisions related to their health and health care. An important caveat is that virtually anything can be published on the Internet. Although academic publications require rigorous peer review, Internet websites have no regulatory body monitoring quality and content. With a lack of external regulation, the information retrieved may be incorrect or outdated. The Internet can be a valuable asset for educating patients, but because of significant variability physicians should be familiar with the quality of information available. This article discusses both the strengths and weaknesses of information available on the Internet regarding anterior cruciate ligament repair. 相似文献
49.
Hemodynamics during liver transplantation: the interactions between cardiac output and portal venous and hepatic arterial flows. 总被引:12,自引:0,他引:12
J M Henderson G T Gilmore G J Mackay J R Galloway T F Dodson M H Kutner 《Hepatology (Baltimore, Md.)》1992,16(3):715-718
Liver blood flow and systemic hemodynamics were measured intraoperatively in 34 patients after liver transplantation. Ultrasound transit-time flow probes measured hepatic arterial and portal venous flow over 10 to 75 min 1 to 3 hr after reperfusion. Cardiac output was measured by thermodilution. Mean cardiac output was 9.5 +/- 2.8 L/min; the mean total liver blood flow of 2,091 +/- 932 ml/min was 23% +/- 11% of cardiac output. Mean portal flow of 1,808 +/- 929 ml/min was disproportionately high at 85% +/- 10% of total liver blood flow. Correlation analysis showed a significant (p less than 0.01; r = 0.42) correlation between cardiac output and portal venous flow and a trend toward negative correlation (p = 0.087) between cardiac output and hepatic arterial flow. These data show that increased flow in the newly transplanted liver is predominantly portal venous flow and is associated with high cardiac output and reduced hepatic arterial flow. In the last 13 patients studied, portal flow was reduced by 50% and the hepatic artery response was measured. We saw a significant (p less than 0.05) increase in hepatic artery flow from 322 +/- 228 to 419 +/- 271 ml/min, indicating an intact hepatic arterial buffer response. The hepatic artery response also showed that it is a reversible rather than a fixed resistance that contributes to the low hepatic artery flow in these patients. 相似文献
50.
Coakley G; Mok CC; Hajeer AH; Ollier WE; Turner D; Sinnott PJ; Hutchinson IV; Panayi GS; Lanchbury JS 《Rheumatology (Oxford, England)》1998,37(9):988-991
OBJECTIVE: To examine whether promoter polymorphisms associated with
variation in interleukin-10 (IL-10) production are relevant to the
development of rheumatoid arthritis (RA) or Felty's syndrome (FS). METHODS:
DNA was obtained from 44 FS patients, 117 RA patients and 295 controls. The
promoter region between -533 and - 1120 was amplified by polymerase chain
reaction, and polymorphisms detected by restriction enzyme digest or
sequence-specific oligonucleotide probing. RESULTS: We found no significant
difference in allele or haplotype frequencies between the groups.
CONCLUSION: There is no association between FS or RA and these recently
identified IL-10 promoter polymorphisms. Other genetic or environmental
factors could explain the alterations in IL-10 levels seen in these
conditions.
相似文献