全文获取类型
收费全文 | 2015篇 |
免费 | 118篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 23篇 |
儿科学 | 89篇 |
妇产科学 | 33篇 |
基础医学 | 231篇 |
口腔科学 | 60篇 |
临床医学 | 180篇 |
内科学 | 426篇 |
皮肤病学 | 91篇 |
神经病学 | 97篇 |
特种医学 | 444篇 |
外科学 | 236篇 |
综合类 | 53篇 |
预防医学 | 34篇 |
眼科学 | 20篇 |
药学 | 66篇 |
1篇 | |
中国医学 | 1篇 |
肿瘤学 | 54篇 |
出版年
2023年 | 12篇 |
2022年 | 13篇 |
2021年 | 18篇 |
2020年 | 17篇 |
2019年 | 27篇 |
2018年 | 24篇 |
2017年 | 32篇 |
2016年 | 38篇 |
2015年 | 35篇 |
2014年 | 54篇 |
2013年 | 58篇 |
2012年 | 43篇 |
2011年 | 67篇 |
2010年 | 80篇 |
2009年 | 87篇 |
2008年 | 66篇 |
2007年 | 65篇 |
2006年 | 59篇 |
2005年 | 51篇 |
2004年 | 46篇 |
2003年 | 39篇 |
2002年 | 29篇 |
2001年 | 43篇 |
2000年 | 21篇 |
1999年 | 33篇 |
1998年 | 83篇 |
1997年 | 83篇 |
1996年 | 82篇 |
1995年 | 69篇 |
1994年 | 47篇 |
1993年 | 59篇 |
1992年 | 10篇 |
1991年 | 18篇 |
1990年 | 30篇 |
1989年 | 61篇 |
1988年 | 47篇 |
1987年 | 51篇 |
1986年 | 58篇 |
1985年 | 73篇 |
1984年 | 38篇 |
1983年 | 32篇 |
1982年 | 30篇 |
1981年 | 34篇 |
1980年 | 39篇 |
1979年 | 11篇 |
1978年 | 22篇 |
1977年 | 24篇 |
1976年 | 25篇 |
1975年 | 25篇 |
1974年 | 9篇 |
排序方式: 共有2139条查询结果,搜索用时 15 毫秒
81.
Assessment of an abbreviated odorant identification task for children: a rapid screening device for schools and clinics 总被引:1,自引:0,他引:1
To validate the level of olfactory performance of children, we tested 825 volunteers, aged 4–17 years, with an abbreviated form of our pediatric odorant identification task. The test consisted of sniffing and identifying five odorants (baby powder, bubble gum, candy cane, licorice and peach). Mean olfactory scores increased as a function of age, reaching a plateau of about 94–95% correct at 8 years of age. In general, girls out–performed boys. Physicians require a test instrument such as the one we have devised to allow them to diagnose olfactory dysfunction in children. The present task is particularly applicable in screening large numbers of children in clinics or schools because it can be administered easily and rapidly. Adult subjects with olfactory dysfunction also performed poorly on this odorant identification task designed for children. Therefore, we expect that our odorant identification task will also detect children with severe olfactory dysfunction. 相似文献
82.
83.
84.
Impact of HLA-compatibilities in patients undergoing liver transplantation for HBV-cirrhosis 总被引:6,自引:0,他引:6
Neumann UP Langrehr JM Naumann U Lang M Rayes N Steinmüller T Radtke C Neuhaus P 《Clinical transplantation》2002,16(2):122-129
Liver transplantation (OLT) for end-stage chronic hepatitis-B-virus (HBV) infection is frequently complicated by HBV recurrence. In the present study we investigated whether human leucocyte antigen (HLA)-matching influences the outcome after OLT. In a retrospective analysis we reviewed 84 recipients of liver transplants for end-stage HBV-cirrhosis and complete HLA-typing for outcome after OLT. Follow-up ranges from 1 to 110 months (median = 55.6 months). Immunosuppression consisted of Cyclosporin A (CsA)-based quadruple induction therapy or Tacrolimus-based induction protocols. Immunoprophylaxis with hepatitis B immunoglobulin was started at OLT and continued long-term. Actuarial 1- and 5-yr graft survival figures were 90.5 and 80.4%, respectively. Hepatitis-B recurrence was responsible for 15 of 20 (75%) graft failures. We observed a significantly improved graft survival in patients with more HLA-A, -B compatibilities (p = 0.02), whereas the degree of HLA-DR compatibilities did not influence the outcome. The occurrence of HBV-reinfection was significantly lower in HLA-A, -B matched grafts (p < 0.05). Additionally, graft survival was prolonged in patients with HBV-reinfection and 1 or 2 HLA-B compatibilities when compared with patients with HBV-reinfection and a complete HLA-B mismatch (p = 0.02). In conclusion, this retrospective analysis shows that more HLA-A, -B compatibilities seems to be associated with an improved graft survival in patients after OLT for end-stage HBV infection. 相似文献
85.
Solid lipid nanoparticles (SLN) were developed at the beginning of the 1990 s as an alternative carrier system to emulsions, liposomes and polymeric nanoparticles. The paper reviews advantages-also potential limitations-of SLN for the use in topical cosmetic and pharmaceutical formulations. Features discussed include stabilisation of incorporated compounds, controlled release, occlusivity, film formation on skin including in vivo effects on the skin. As a novel type of lipid nanoparticles with solid matrix, the nanostructured lipid carriers (NLC) are presented, the structural specialties described and improvements discussed, for example, increase in loading capacity, physical and chemical long-term stability, triggered release and potentially supersaturated topical formulations. For both SLN and NLC, the technologies to produce the final topical formulation are described, especially the production of highly concentrated lipid nanoparticle dispersions >30-80% lipid content. Production issues also include clinical batch production, large scale production and regulatory aspects (e. g. status of excipients or proof of physical stability). 相似文献
86.
87.
88.
89.
Khan RB Boop FA Onar A Sanford RA 《中国神经肿瘤杂志》2006,4(2):142-142
OBJECT: The goals of this study were to define the incidence of seizures in children with low-grade tumors, study seizure outcome after lesionectomy in these children, and identify risk factors for poor seizure outcome, METHODS: The authors performed a retrospective chart review of children who harbored low-grade brain tumors, experienced seizures, and were treated in a single institution, Statistical analyses included step-wise as well as single-variable binary logistic regression analyses. 相似文献
90.