全文获取类型
收费全文 | 990篇 |
免费 | 93篇 |
国内免费 | 22篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 68篇 |
妇产科学 | 8篇 |
基础医学 | 147篇 |
口腔科学 | 55篇 |
临床医学 | 85篇 |
内科学 | 217篇 |
皮肤病学 | 29篇 |
神经病学 | 40篇 |
特种医学 | 219篇 |
外科学 | 50篇 |
综合类 | 37篇 |
预防医学 | 42篇 |
眼科学 | 5篇 |
药学 | 38篇 |
肿瘤学 | 63篇 |
出版年
2018年 | 12篇 |
2016年 | 13篇 |
2015年 | 13篇 |
2014年 | 18篇 |
2013年 | 15篇 |
2012年 | 15篇 |
2011年 | 15篇 |
2010年 | 27篇 |
2009年 | 28篇 |
2008年 | 25篇 |
2007年 | 27篇 |
2006年 | 25篇 |
2005年 | 18篇 |
2004年 | 15篇 |
2003年 | 16篇 |
2002年 | 19篇 |
2001年 | 22篇 |
2000年 | 24篇 |
1999年 | 21篇 |
1998年 | 41篇 |
1997年 | 46篇 |
1996年 | 44篇 |
1995年 | 36篇 |
1994年 | 27篇 |
1993年 | 33篇 |
1992年 | 22篇 |
1991年 | 22篇 |
1990年 | 15篇 |
1989年 | 27篇 |
1988年 | 32篇 |
1987年 | 49篇 |
1986年 | 31篇 |
1985年 | 20篇 |
1984年 | 12篇 |
1983年 | 14篇 |
1982年 | 14篇 |
1981年 | 22篇 |
1980年 | 18篇 |
1979年 | 10篇 |
1978年 | 8篇 |
1977年 | 11篇 |
1976年 | 23篇 |
1975年 | 12篇 |
1934年 | 8篇 |
1932年 | 17篇 |
1931年 | 16篇 |
1930年 | 14篇 |
1929年 | 7篇 |
1927年 | 6篇 |
1926年 | 6篇 |
排序方式: 共有1105条查询结果,搜索用时 15 毫秒
81.
Fritz Demuth 《European journal of pediatrics》1926,41(1-2):252-255
Ohne ZusammenfassungMit 3 Abbildungen im Text. 相似文献
82.
Fritz Demuth 《European journal of pediatrics》1925,39(5):613-618
Zusammenfassung Das Auftreten von Muskelzuckungen auf mechanischen Reiz ist bei jungen Säuglingen ein prognostisch bedenkliches ZeichenIdiomuskuläre Wulstbildung ist ein noch ernsteres Zeichen.Eine Ausnahme machen vielleicht Neugeborene. 相似文献
83.
84.
Data obtained on 426 consecutive patients referred to a breast center by 122 physicians, including family practitioners, general surgeons, and other specialists, showed that the obstetricians-gynecologists referred the greatest average number of patients per physician, with more than 50% of these referrals for screening mammography. Internists referred fewer patients by nearly a factor of ten, with only one-third of these patients referred for screening mammography. Internists may be the weakest link in the utilization of screening mammography. 相似文献
85.
86.
The acoustic startle response (ASR) and discharges of single units in the inferior colliculus (IC) were evaluated as a function of the repetition rate and trial (stimulus 1–10 at each rate) of intense noise bursts in mice. The amplitude of the ASR was inversely proportional to both rate and trial. The mean number of discharges for the sample population of units of the central nucleus (ICC) and the external nucleus (ICX) were also inversely proportional to stimulus rate. However, only ICX units were inversely proportional to trial (i.e. as was the ASR). When response properties of individual units were examined, a variety of profiles was observed with regard to rate and trial sensitivity: units were either not sensitive to stimulus rate, inversely sensitive, directly sensitive, or complexly sensitive. Superimposed on these rate classifications were trial sensitivity, with some units being insensitive to trial, directly sensitive, or inversely sensitive. The incidence of response types differed in some respects between ICC and ICX and these differences were, in general, consistent with the mean responses of the neuronal populations. 相似文献
87.
Ohne Zusammenfassung 相似文献
88.
89.
K A Lafferty E L Nelson R J Demuth S H Miller M W Harrison 《The Journal of hand surgery》1986,11(5):737-740
Juvenile aponeurotic fibromas, although locally recurrent, generally do not metastasize. This observation supports the practice of incomplete excision of the tumor to preserve the function of the involved extremity. We report on a patient with a juvenile aponeurotic fibroma of the palm, who returned 5 years after the second local surgical excision with metastatic fibrosarcoma of the lungs and bones. 相似文献
90.
I Puls K Hauck K Demuth A Horowski M Schliesser P D?rfler P Scheel K V Toyka K Reiners M Sch?ning G Becker 《Stroke; a journal of cerebral circulation》1999,30(11):2291-2295
BACKGROUND AND PURPOSE: The diagnosis and quantification of microangiopathy in dementia is difficult. The assessment of small-vessel disease requires expensive and sophisticated nuclear medicine techniques. This study was performed to identify microangiopathy related to the integrity of cerebral microcirculation by sonographic measurements (arteriovenous cerebral transit time [cTT]). METHODS: We performed transcranial color-coded duplex sonography in 40 patients with vascular dementia, 20 patients with Alzheimer's disease or Lewy body disease, and 25 age-matched controls. The clinical diagnosis was established by history of dementia and neuroimaging findings. Cognitive impairment was assessed by the Mini-Mental State Examination and Alzheimer's Disease Assessment Scale. cTT is defined as the time required by an ultrasound contrast agent to pass from a cerebral artery to a vein. This was measured by recording the power-Doppler intensity curves in the P2 segment of the posterior cerebral artery and the vein of Galen. Previous studies have shown a prolongation of cTT in patients with cerebral microangiopathy. RESULTS: cTT was substantially prolonged in patients with vascular dementia (5.8 seconds; 25th percentile 4.5; 75th percentile 7.5; U test, P<0.001) compared with controls (3.1 seconds; 2.3; 3.4) but not in patients with degenerative dementia (3.7 seconds; 3.7; 4.2). In patients with vascular dementia, cTT was significantly correlated with cognitive impairment. CONCLUSIONS: cTT may be useful tool to disclose small-vessel disease in demented patients. Examination is noninvasive and quickly performed. It may be also useful in follow-up examinations in patients undergoing therapy. 相似文献