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   1610886篇
  免费   120304篇
  国内免费   4508篇
耳鼻咽喉   23064篇
儿科学   51276篇
妇产科学   43797篇
基础医学   228216篇
口腔科学   44444篇
临床医学   138030篇
内科学   326109篇
皮肤病学   35512篇
神经病学   124298篇
特种医学   63814篇
外国民族医学   718篇
外科学   250132篇
综合类   35686篇
现状与发展   2篇
一般理论   423篇
预防医学   110958篇
眼科学   36286篇
药学   122636篇
  3篇
中国医学   4360篇
肿瘤学   95934篇
  2019年   11426篇
  2018年   16966篇
  2017年   12864篇
  2016年   13899篇
  2015年   15785篇
  2014年   22068篇
  2013年   32526篇
  2012年   44667篇
  2011年   46794篇
  2010年   28098篇
  2009年   26848篇
  2008年   44712篇
  2007年   48111篇
  2006年   48328篇
  2005年   46374篇
  2004年   45186篇
  2003年   43858篇
  2002年   42836篇
  2001年   88238篇
  2000年   91326篇
  1999年   76970篇
  1998年   19725篇
  1997年   17471篇
  1996年   17404篇
  1995年   16408篇
  1994年   15387篇
  1993年   14244篇
  1992年   58701篇
  1991年   56531篇
  1990年   54727篇
  1989年   52684篇
  1988年   48175篇
  1987年   47064篇
  1986年   43649篇
  1985年   41614篇
  1984年   30358篇
  1983年   25353篇
  1982年   14153篇
  1981年   12666篇
  1979年   26375篇
  1978年   17894篇
  1977年   15272篇
  1976年   13740篇
  1975年   15077篇
  1974年   17526篇
  1973年   16799篇
  1972年   15603篇
  1971年   14304篇
  1970年   13439篇
  1969年   12451篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
992.
There is a recognized need for the early detection of gestational diabetes, and a single blood test, if reliable, would be advantageous. Because serum albumin and total protein are glycosylated and have short life spans, we investigated the usefulness of glycosylated albumin and glycosylated protein in the detection of gestational diabetes. We studied five groups, each with 20 subjects: nonpregnant and pregnant controls, nonpregnant and pregnant insulin-dependent diabetic (IDDM) patients, and gestational diabetic patients. All patients with no history of diabetes had an oral glucose tolerance test to define their carbohydrate status. Our results showed that percent glycosylated albumin and percent glycosylated protein were significantly elevated in both groups of IDDM patients compared with the other groups. However, gestational diabetic patients had glycosylated albumin and glycosylated protein values similar to those of both control groups. Both glycosylated albumin and glycosylated protein correlated well with HbA1c determinations. Thus, glycosylated albumin and glycosylated protein may be a good index of glycemic control, but they are of little value in the diagnosis of gestational diabetes because of a lack of sensitivity: 8 and 3% for glycosylated albumin and glycosylated protein, respectively.  相似文献   
993.
P Campion 《The Practitioner》1987,231(1433):1056, 1058, 1061-1056, 1058, 1062
  相似文献   
994.
995.
Stomatococcus mucilaginosus was isolated from the blood of a patient with endocarditis and a past history of drug abuse and aortic valve replacement. At autopsy, Gram stain of the aortic valve revealed gram-positive cocci. Our isolate was atypical for S. mucilaginosus in that colonies were nonmucoid and nonadherent to agar surfaces. Cellular capsules were demonstrated by light and electron microscopy. Phenotypic characteristics identified by conventional methods as well as profile numbers obtained by using two commercial identification systems for staphylococci, the API Staph-Ident and the dms Staph Trac, are presented. Practical tests that differentiate S. mucilaginosus from the genera Micrococcus and Staphylococcus include growth on nutrient agar containing salt and lysostaphin susceptibility. Additional tests that helped differentiate our isolate from group D streptococci included hydrolysis of L-pyrrolidonyl-beta-naphthylamide and streptococcal serogrouping.  相似文献   
996.
以病人选择医生为契机 全力推进人事分配制度改革   总被引:1,自引:0,他引:1  
介绍了邯郸市中心医院在病人选医生中,努力完善制度,提高素质,深化内容,并以此为突破口,建立了灵活、高效的人事分配制度.用较为低廉的医疗费用,为人民群众提供了较好的医疗服务.  相似文献   
997.
Summary Monospecific antibodies to actin and to tubulin were used as immunofluorescent probes to evaluate the distribution of microtubules and actin filaments in the organ of Corti in mouse and guinea pig. The results indicate that in cochlear receptor cells actin and actin filaments as well as tubulin and microtubules are integral cytoskeletal elements. The presence of actin suggests a possible contractile mechanism within the sensory cilia whereas tubulin is thought to play an important role in the stability of sensory cells. Both proteins are discussed to form structural elements required for the mechano-chemical coupling in hearing.
Abbreviations ATP adenosin-tri-phosphate - SDS sodium-dodecyl-sulphate - PBS phosphate-buffered saline Dedicated to Professor Dr. A. Herrmann on the occasion of his 80th birthday  相似文献   
998.
999.
1000.
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