全文获取类型
收费全文 | 434篇 |
免费 | 25篇 |
国内免费 | 19篇 |
专业分类
儿科学 | 33篇 |
妇产科学 | 11篇 |
基础医学 | 46篇 |
口腔科学 | 10篇 |
临床医学 | 51篇 |
内科学 | 78篇 |
皮肤病学 | 13篇 |
神经病学 | 12篇 |
特种医学 | 111篇 |
外科学 | 39篇 |
综合类 | 10篇 |
预防医学 | 19篇 |
眼科学 | 9篇 |
药学 | 14篇 |
中国医学 | 2篇 |
肿瘤学 | 20篇 |
出版年
2024年 | 1篇 |
2021年 | 1篇 |
2020年 | 5篇 |
2019年 | 4篇 |
2018年 | 11篇 |
2017年 | 5篇 |
2016年 | 7篇 |
2015年 | 9篇 |
2014年 | 13篇 |
2013年 | 12篇 |
2012年 | 9篇 |
2011年 | 13篇 |
2010年 | 16篇 |
2009年 | 21篇 |
2008年 | 11篇 |
2007年 | 17篇 |
2006年 | 6篇 |
2005年 | 6篇 |
2004年 | 3篇 |
2003年 | 2篇 |
2002年 | 6篇 |
2001年 | 8篇 |
2000年 | 2篇 |
1999年 | 10篇 |
1998年 | 31篇 |
1997年 | 38篇 |
1996年 | 28篇 |
1995年 | 18篇 |
1994年 | 17篇 |
1993年 | 17篇 |
1992年 | 1篇 |
1991年 | 6篇 |
1990年 | 11篇 |
1989年 | 20篇 |
1988年 | 12篇 |
1987年 | 9篇 |
1986年 | 8篇 |
1985年 | 10篇 |
1984年 | 4篇 |
1983年 | 8篇 |
1982年 | 6篇 |
1981年 | 2篇 |
1980年 | 11篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1977年 | 6篇 |
1976年 | 7篇 |
1975年 | 5篇 |
1970年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有478条查询结果,搜索用时 0 毫秒
471.
472.
Hamerlynck SM Cohen-Kettenis PT Vermeiren R Jansen LM Bezemer PD Doreleijers TA 《Child and adolescent psychiatry and mental health》2007,1(1):4-7
Background
The purpose of this study was to investigate the lifetime prevalence of teenage pregnancy in the histories of detained adolescent females and to examine the relationship between teenage pregnancy on the one hand and mental health and sexuality related characteristics on the other. 相似文献473.
RVM Krishnamurthi S Mathai AH Kim R Zhang J Guan 《British journal of pharmacology》2009,156(4):662-672
Background and purpose:
Cyclo-L-glycyl-L-2-allylproline (NNZ-2591), a modified diketopiperazine, is neuroprotective and improves long-term function after hypoxic-ischaemic brain injury in rats. The present studies were designed to examine both the neuroprotective and neurotrophic actions of NNZ-2591 on neurochemical and behavioural changes in a rat model of Parkinson''s disease.Experimental approach:
To examine its protective effect, either NNZ-2591 (20 ng·day−1) or saline was given intracerebroventricularly for 3 days starting 2 h after 6-hydroxydopamine (6-OHDA) induced unilateral striatal lesion. In a subsequent experiment either NNZ-2591 (0.2, 1 and 5 mg·day−1, s.c.) or saline was administered daily for 14 days starting 2 weeks after the lesion. Behavioural and neurochemical outcomes were examined using the adjusting step test and immunohistochemical staining.Key results:
Cyclo-L-glycyl-L-2-allylproline given 2 h after the lesion reduced the degree of motor deficit compared with the saline-treated group. Delayed treatment with NNZ-2591, initiated after the onset of motor deficit, significantly improved motor function from week 7 onwards compared with the saline-treated group. Neither treatment regime altered nigrostriatal dopamine depletion. NNZ-2591 significantly enhanced the expression of doublecortin-positive neuroblasts in the sub-ventricular zone.Conclusions and implications:
These studies reveal that early treatment with NNZ-2591 protects against the motor deficit induced by 6-OHDA and that treatment initiated after the establishment of motor impairment significantly improves long-term motor function. These effects of NNZ-2591 on functional recovery were independent of dopamine depletion and also appeared not to be symptomatic as the improved motor function was long-lasting. NNZ-2591 has potential as a therapeutic agent for neurodegenerative disorders. 相似文献474.
Lisette 't A Hart-Kerkhoffs Theo AH Doreleijers Lucres MC Jansen Anton PH van Wijk Ruud AR Bullens 《Child and adolescent psychiatry and mental health》2009,3(1):19-10
Objective:
This article reports on offense related characteristics and the psychosexual development in subgroups of juvenile sex offenders as measured by the Global Assessment Instrument for Juvenile Sex Offenders (GAIJSO). The predictive validity of these characteristics for persistent (sexual) offensive behavior in subgroups of juvenile sex offenders was investigated. 相似文献475.
Background
The life-time incidence of low back pain is high and diagnoses of spinal stenosis and disc prolapse are increasing. Consequently, there is a steady rise in surgical interventions for these conditions. Current evidence suggests that while the success of surgery is incomplete, it is superior to conservative interventions. A recent survey indicates that there are large differences in the type and intensity of rehabilitation, if any, provided after spinal surgery as well as in the restrictions and advice given to patients in the post-operative period. 相似文献476.
477.
M Groenink RACM de Bruin‐Bon J Timmermans AJH Scholte MP van den Berg MJH Baars JP van Tintelen M Kempers AH Zwinderman BJM Mulder 《Clinical genetics》2011,80(4):346-353
Radonic T, de Witte P, Groenink M, de Bruin‐Bon RACM, Timmermans J, Scholte AJH, van den Berg MP, Baars MJH, van Tintelen JP, Kempers M, Zwinderman AH, Mulder BJM. Critical appraisal of the revised Ghent criteria for diagnosis of Marfan syndrome. Marfan syndrome (MFS) is a connective tissue disorder with major features in cardiovascular, ocular and skeletal systems. Recently, diagnostic criteria were revised where more weight was given to the aortic root dilatation. We applied the revised Marfan nosology in an established adult Marfan population to define practical repercussions of novel criteria for clinical practice and individual patients. Out of 180 MFS patients, in 91% (n = 164) the diagnosis of MFS remained. Out of 16 patients with rejected diagnosis, four patients were diagnosed as MASS (myopia, mitral valve prolapse, borderline non‐progressive aortic root dilatation, skeletal findings and striae) phenotype, three as ectopia lentis syndrome and in nine patients no alternative diagnosis was established. In 13 patients, the diagnosis was rejected because the Z‐score of the aortic root was <2, although the aortic diameter was larger than 40 mm in six of them. In three other patients, the diagnosis of MFS was rejected because dural ectasia was given less weight in the revised nosology. Following the revised Marfan nosology, the diagnosis of MFS was rejected in 9% of patients, mostly because of the absence of aortic root dilatation defined as Z‐score ≥2. Currently used Z‐scores seem to underestimate aortic root dilatation, especially in patients with large body surface area (BSA). We recommend re‐evaluation of criteria for aortic root involvement in adult patients with a suspected diagnosis of MFS. 相似文献
478.