全文获取类型
收费全文 | 2381820篇 |
免费 | 172239篇 |
国内免费 | 4394篇 |
专业分类
耳鼻咽喉 | 35246篇 |
儿科学 | 77361篇 |
妇产科学 | 67275篇 |
基础医学 | 335618篇 |
口腔科学 | 67787篇 |
临床医学 | 204960篇 |
内科学 | 469178篇 |
皮肤病学 | 53044篇 |
神经病学 | 187953篇 |
特种医学 | 95331篇 |
外国民族医学 | 1056篇 |
外科学 | 367866篇 |
综合类 | 53653篇 |
现状与发展 | 7篇 |
一般理论 | 763篇 |
预防医学 | 172323篇 |
眼科学 | 55228篇 |
药学 | 178561篇 |
6篇 | |
中国医学 | 5006篇 |
肿瘤学 | 130231篇 |
出版年
2018年 | 22663篇 |
2016年 | 19352篇 |
2015年 | 21898篇 |
2014年 | 30646篇 |
2013年 | 46805篇 |
2012年 | 63071篇 |
2011年 | 66839篇 |
2010年 | 39912篇 |
2009年 | 38324篇 |
2008年 | 64021篇 |
2007年 | 69309篇 |
2006年 | 69801篇 |
2005年 | 67866篇 |
2004年 | 66380篇 |
2003年 | 64322篇 |
2002年 | 63251篇 |
2001年 | 113884篇 |
2000年 | 117686篇 |
1999年 | 99888篇 |
1998年 | 26973篇 |
1997年 | 24418篇 |
1996年 | 24257篇 |
1995年 | 22959篇 |
1994年 | 21589篇 |
1993年 | 20135篇 |
1992年 | 78325篇 |
1991年 | 76275篇 |
1990年 | 74479篇 |
1989年 | 72009篇 |
1988年 | 66752篇 |
1987年 | 65777篇 |
1986年 | 62156篇 |
1985年 | 59248篇 |
1984年 | 44437篇 |
1983年 | 37594篇 |
1982年 | 22147篇 |
1981年 | 20176篇 |
1979年 | 41373篇 |
1978年 | 29101篇 |
1977年 | 25043篇 |
1976年 | 22999篇 |
1975年 | 25674篇 |
1974年 | 30224篇 |
1973年 | 29223篇 |
1972年 | 27615篇 |
1971年 | 25489篇 |
1970年 | 24146篇 |
1969年 | 22737篇 |
1968年 | 21069篇 |
1967年 | 18912篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
942.
J.P. Thyssen P. Jensen B.C. Carlsen K. Engkilde T. Menné J.D. Johansen 《The British journal of dermatology》2009,161(6):1288-1293
Background Chromium allergy has traditionally been caused by occupational skin contact with cement. In 1983, Danish legislation made the addition of ferrous sulphate compulsory in cement to reduce the water‐soluble chromium content to not more than 2 ppm. An effect from this intervention has previously been demonstrated among Danish construction workers. Objectives To investigate the development of chromium allergy among patients with dermatitis tested between 1985 and 2007 in Denmark. Furthermore, to determine causative exposures in patients with chromium allergy. Patients and methods A retrospective analysis of patch test data was performed (n = 16 228) and charts from patients with chromium allergy were reviewed. Comparisons were made using a χ2 test. Logistic regression analyses were used to test for associations. Results The prevalence of chromium allergy decreased significantly from 3·6% in 1985 to 1% in 1995 (Ptrend < 0·001) but increased to 3·3% in 2007 (Ptrend < 0·001). The frequency of clinically relevant cement exposure decreased significantly among patients with chromium allergy from 12·7% in 1989–1994 to 3·0% (P < 0·01) in 1995–2007, whereas the frequency of relevant leather exposure increased significantly from 24·1% during 1989–1994 to 45·5% during 1995–2007 (P < 0·02). Conclusions Chromium allergy is currently increasing in Denmark due to leather exposure. 相似文献
943.
Onur Hapa Hüsamettin ?ak?c? Kaan Gidero?lu Kutay ?zturan Aysel Kükner Güler Bu?dayc? 《Archives of orthopaedic and trauma surgery》2009,129(12):1721-1726
Introduction
Ethanol has a suppressive effect on inflammation and the immune system, but the effect of ethanol on tendon healing in vivo has not been studied. The purpose of this study was to investigate the histological and biomechanical effects of ethanol intake on tendon healing in a rat tendon injury model. 相似文献944.
Loa Clausen Kristian Rokkedal Jan H. Rosenvinge 《European eating disorders review》2009,17(6):462-467
The Eating Disorder Inventory, Version 2 (EDI‐2) is a questionnaire used clinically and in research all over the world. EDI‐2 is cross‐culturally valid, yet normative values may depend on culture. Norms and reliability of the Danish version have to date been lacking, and will be presented in this article, comparing patients (N = 575) and controls (N = 881). Also, internal reliability of scales is tested for both groups. Differences between norms of the Danish and the North American version of EDI were small but significant for all scales except asceticism (eating disorder patients) and ineffectiveness, interpersonal distrust and maturity fears (normal controls). For both groups the internal consistency was >0.70 for all subscales except asceticism. Although differences across the eating disorder diagnostic groups were dubious, the EDI‐2 is useful to screen for eating problems in the general population as well as to rate progress and outcome among eating disorder patients. Copyright © 2009 John Wiley & Sons, Ltd and Eating Disorders Association. 相似文献
945.
946.
Anna Krygowska-Wajs William P. Cheshire Zbigniew K. Wszolek Alicja Hubalewska-Dydejczyk Barbara Jasinska-Myga Matthew J. Farrer Marek Moskala Anna Sowa-Staszczak 《Parkinsonism & related disorders》2009,15(9):692-696
ObjectiveTo assess for the presence of gastric dysmotility in familial and sporadic Parkinson disease (PD).Methods10 subjects with familial Parkinson disease (fPD), 35 subjects with sporadic Parkinson disease (sPD), and 15 controls, all from academic tertiary care movement disorders centers, were studied. fPD was defined as the presence of at least 2 affected individuals within 2–3 consecutive generations in a family. Molecular genetic analysis has not revealed, thus far, any known genomic abnormality in these families. Gastric emptying was assessed by dynamic abdominal scintigraphy over 92 min following ingestion of a solid meal containing 99mTc-labeled colloid of 40 MBq activity. The main outcome measures were gastric emptying half-time and radiotracer activity over the gastric area at 46 and at 92 min.ResultsGastric emptying time was delayed in 60% of subjects with PD. In comparison to mean t1/2 of 38 ± 7 min in controls, mean t1/2 was 58 ± 25 min in fPD (p = 0.02) and 46 ± 25 min in sPD (p = 0.10). Both fPD and sPD groups included subjects with delayed gastric emptying at an early stage of disease.ConclusionsPatients with fPD showed significantly delayed gastric emptying in comparison to normal age-matched individuals. Further studies of gastrointestinal dysfunction in PD, particularly fPD, are warranted. 相似文献
947.
948.
949.
950.