全文获取类型
收费全文 | 2602篇 |
免费 | 226篇 |
国内免费 | 30篇 |
专业分类
耳鼻咽喉 | 59篇 |
儿科学 | 149篇 |
妇产科学 | 91篇 |
基础医学 | 286篇 |
口腔科学 | 116篇 |
临床医学 | 278篇 |
内科学 | 446篇 |
皮肤病学 | 85篇 |
神经病学 | 50篇 |
特种医学 | 254篇 |
外科学 | 567篇 |
综合类 | 47篇 |
预防医学 | 130篇 |
眼科学 | 45篇 |
药学 | 104篇 |
中国医学 | 5篇 |
肿瘤学 | 146篇 |
出版年
2023年 | 14篇 |
2022年 | 15篇 |
2021年 | 25篇 |
2020年 | 21篇 |
2019年 | 19篇 |
2018年 | 56篇 |
2017年 | 53篇 |
2016年 | 51篇 |
2015年 | 74篇 |
2014年 | 107篇 |
2013年 | 139篇 |
2012年 | 100篇 |
2011年 | 90篇 |
2010年 | 111篇 |
2009年 | 124篇 |
2008年 | 81篇 |
2007年 | 102篇 |
2006年 | 88篇 |
2005年 | 79篇 |
2004年 | 80篇 |
2003年 | 63篇 |
2002年 | 82篇 |
2001年 | 86篇 |
2000年 | 70篇 |
1999年 | 63篇 |
1998年 | 115篇 |
1997年 | 100篇 |
1996年 | 102篇 |
1995年 | 73篇 |
1994年 | 76篇 |
1993年 | 40篇 |
1992年 | 23篇 |
1991年 | 36篇 |
1990年 | 29篇 |
1989年 | 44篇 |
1988年 | 48篇 |
1987年 | 45篇 |
1986年 | 41篇 |
1985年 | 34篇 |
1984年 | 15篇 |
1983年 | 13篇 |
1982年 | 23篇 |
1981年 | 25篇 |
1980年 | 16篇 |
1979年 | 19篇 |
1978年 | 13篇 |
1977年 | 18篇 |
1976年 | 16篇 |
1975年 | 21篇 |
1974年 | 15篇 |
排序方式: 共有2858条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.
85.
Adipokines played a limited role in predicting temporary growth differences between very low birthweight infants with and without bronchopulmonary dysplasia
下载免费PDF全文
![点击此处可从《Acta paediatrica (Oslo, Norway : 1992)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
86.
K. Ridwelski Prof. Dr. I. Gastinger H. Ptok F. Meyer H. Dralle H. Lippert 《Der Chirurg》2013,84(1):46-52
The aim of the review is to compare the results of selected German multicenter observational studies on the surgical treatment of gastric carcinoma within the last two decades. Overall, 6,035 patients with gastric cancer who had been registered in numerous German comprehensive surgical clinics and departments in the time periods 1986–1989, January through December 2002 and 2007–2009 were enrolled in this analysis. In particular, the study aimed to investigate the most important criteria and factors with an impact on the perioperative and early postoperative outcome including the effects on oncological long-term results. In addition to the advances in diagnostic procedures and surgical techniques, the impact of multimodal therapeutic concepts which have been established particularly in the third investigation period is emphasized. 相似文献
87.
88.
Julia F. Lippert Steven E. Lacey Rachael M. Jones 《Journal of occupational and environmental hygiene》2014,11(11):722-727
Exposure monitoring data indicate the potential for substantive exposure to laser-generated air contaminants (LGAC); however the diversity of medical lasers and their applications limit generalization from direct workplace monitoring. Emission rates of seven previously reported gas-phase constituents of medical laser-generated air contaminants (LGAC) were determined experimentally and used in a semi-empirical two-zone model to estimate a range of plausible occupational exposures to health care staff. Single-source emission rates were generated in an emission chamber as a one-compartment mass balance model at steady-state. Clinical facility parameters such as room size and ventilation rate were based on standard ventilation and environmental conditions required for a laser surgical facility in compliance with regulatory agencies. All input variables in the model including point source emission rates were varied over an appropriate distribution in a Monte Carlo simulation to generate a range of time-weighted average (TWA) concentrations in the near and far field zones of the room in a conservative approach inclusive of all contributing factors to inform future predictive models. The concentrations were assessed for risk and the highest values were shown to be at least three orders of magnitude lower than the relevant occupational exposure limits (OELs). Estimated values do not appear to present a significant exposure hazard within the conditions of our emission rate estimates. 相似文献
89.
Graziani G; Pasqualetti D; Lopez M; D'Onofrio C; Testi AM; Mandelli F; Gallo RC; Bonmassar E 《Blood》1987,69(4):1175-1181
Peripheral mononuclear cells (MNC) collected from 12 healthy donors and 44 leukemic patients at various stages of the disease were tested for natural killer (NK) activity and for their susceptibility to HTLV-I infection in vitro, measured in terms of percentage of p19 positive cells. MNC from leukemic donors at any stage of leukemia (ie, onset or relapse, ON/REL; complete remission or off-therapy, CR/OT donors) were highly susceptible to HTLV-I infection. This was true for acute leukemias of lymphoblastic (ALL) or nonlymphoblastic (ANLL) type. MNC of ON/REL patients were more susceptible to HTLV-I than those of CR/OT donors. In addition, leukemic blasts were more rapidly infected (ie, within five to seven days) than the HTLV-I-susceptible normal cord- blood lymphocytes. However, the presence of circulating blasts was not essential to virus susceptibility, since CR/OT MNC, presumably free of leukemic blasts, were still more susceptible to HTLV-I than normal cells. Basal NK function of MNC from leukemic patients was significantly lower than that detectable in healthy controls. However, no correlation was found between susceptibility to HTLV-I infection and NK activity. 相似文献
90.