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   507篇
  免费   17篇
  国内免费   4篇
耳鼻咽喉   3篇
儿科学   5篇
妇产科学   13篇
基础医学   70篇
口腔科学   27篇
临床医学   70篇
内科学   59篇
皮肤病学   2篇
神经病学   46篇
特种医学   40篇
外科学   33篇
综合类   14篇
现状与发展   1篇
预防医学   32篇
眼科学   1篇
药学   39篇
中国医学   2篇
肿瘤学   71篇
  2024年   1篇
  2023年   81篇
  2022年   109篇
  2021年   42篇
  2020年   46篇
  2019年   11篇
  2018年   8篇
  2017年   28篇
  2016年   18篇
  2015年   21篇
  2014年   23篇
  2013年   12篇
  2012年   7篇
  2011年   9篇
  2010年   18篇
  2009年   20篇
  2008年   4篇
  2007年   10篇
  2006年   4篇
  2005年   3篇
  2004年   3篇
  2003年   6篇
  2001年   6篇
  2000年   2篇
  1999年   5篇
  1998年   3篇
  1997年   1篇
  1996年   4篇
  1995年   7篇
  1994年   2篇
  1993年   3篇
  1992年   1篇
  1991年   2篇
  1990年   2篇
  1989年   2篇
  1988年   4篇
排序方式: 共有528条查询结果,搜索用时 31 毫秒
31.
BackgroundWestergren method, commonly used for erythrocyte sedimentation rate (ESR) determination, is simple and inexpensive. However, the 60 min required for the test are disadvantageous, especially for those departments/facilities where prompt evaluation is necessary. We investigated the possibility that earlier ESR recordings might correlate with standard 60-minute ESR and/or be predictive of the latter.MethodsDemographic and clinical data were collected from 220 randomly chosen adult patients hospitalised for various diseases in a medical department. ESR, determined by slightly modified Westergren method, was recorded at 15, 30 and 60 min. Correlation coefficients (r) between the standard and early ESR measurements were calculated for the entire group and for the separate subgroups divided according to patient age, sex and presence of anaemia or of inflammation.ResultsMean ± SD age of the patients was 61.3 ± 19.6, 55% were males; 45% had some inflammatory condition. Mean ± SD ESR values (mm) at 15, 30 and 60 min were 9.0 ± 12.1, 21.4 ± 21.8 and 35.9 ± 27.5, respectively. A statistically significant correlation was found between ESR measurements at 15 and 60 min (r = 0.833, p < 0.001). However, the strongest correlation was observed between 30 and 60 min measurements (r = 0.926, p < 0.001), irrespective of age, sex and presence of anaemia or of inflammation. Based on the ESR determination at 30 min (X), the predicted ESR value at 60 min (Y) could be calculated by a simple equation: Y = 10.7 + 1.2X.ConclusionSixty-minute ESR values can be predicted by the 30-minute estimation. Shortening the test by half an hour might bear practical importance.  相似文献   
32.
33.
34.
35.
36.
Mnk kinase is required for the phosphorylation and activation of the eukaryotic initiation factor 4E (eIF4E), which regulates translation of proteins involve in important aspects of hepatocellular carcinoma (HCC). Here we investigated whether an antifungal agent, cercosporamide, which had been recently identified as a potent Mnk inhibitor, is active against HCC and angiogenesis. We showed that cercosporamide significantly inhibited growth and induced caspase-dependent apoptosis on numerous HCC cell lines, while sparing normal liver cells. In addition, cercosporamide impaired HCC angiogenesis via inhibiting HCC-endothelial cells (HCC-EC) capillary network formation, migration, proliferation and survival. Importantly, cercosporamide sensitized HCC cells to cisplatin in in vitro cell culture and in vivo HCC xenograft mouse model. Cercosporamide blocked the phosphorylation of eIF4E but not Erk or p38 in a dose- and time-dependent manner in HCC and HCC-EC cells, suggesting that suppression of eIF4E phosphorylation was the result of inhibition of Mnk but not Mnk upstream pathways. Overexpression of constitutively active eIF4E (S209D) but not the nonphosphorylatable eIF4E (S209A) abolished the inhibitory effects of cercosporamide in HepG2 cells. Altogether, our work demonstrates that cercosporamide acts as a Mnk inhibitor through blockage of eIF4E phosphorylation and selectively exhibits anti-HCC activities. Our work suggests that targeting MNK-eIF4E pathway represents a therapeutic strategy to overcome chemo-resistance for HCC treatment.  相似文献   
37.
Boron neutron capture therapy (BNCT) is a tumor-selective radiation therapy using α and 7Li particles, which are produced by the reaction of neutron with boron (10B), and taken up by the tumor. The authors report their first experience of BNCT on a patient with no history of surgery, chemotherapy or conventional radiotherapy for papillary cystadenocarcinoma in the upper lip.  相似文献   
38.
Predictors of severe reaction to polyvalent pneumococcal vaccine (PPV) are not established. In the absence of prospective studies, revaccination within 5 years and high titer of protective antibody appear to increase the risk of a local reaction that manifests as self-limiting pain, localized erythema, and edema. A more severe systemic reaction, manifesting as fever, arthralgia, and extensive edema involving the entire upper extremity, is rare, and we report a case in a patient with myeloproliferative disease.  相似文献   
39.
40.
阴道毛滴虫致男性不育的机制研究   总被引:2,自引:0,他引:2  
目的调查了解男性泌尿生殖系阴道毛滴虫(Tv)感染情况与不育的关系,及发生机制的研究。方法涂片、瑞-姬(W—G)染色和培养用光学双目显微镜观察了1986例精液内Tv及精子的活率、活力等指标;采用肝-胨-糖培养方法,对Tv体外培养后,除去虫体,留取培养液,稀释成3个不同浓度,将10例正常生育男性的优化精子分为等体积的(A、B、C、D)4组:A组加入未培养Tv的原培养液,B、C、D组依次加入(1.2×10^8/L、6×10^8/L、1.2×10^9/L)梯度培养液,分别于37%水浴箱中孵育0.5、1、2、4h观察精子运动参数。结果Tv检出率为38%,Tv感染者精子运动参数明显低于正常生育者(P〈0.01)。Tv培养液浓度在6×10^8/L以上时,精子的活率和活力与对照组相比均显著降低(P〈0.05),并呈浓度时间依赖性。结论Tv对精子运动能力有明显的损害作用及代谢产物是其主要的损害抑制因素,是造成不孕不育的重要原因之一。  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