全文获取类型
收费全文 | 764篇 |
免费 | 39篇 |
国内免费 | 69篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 30篇 |
妇产科学 | 10篇 |
基础医学 | 90篇 |
口腔科学 | 12篇 |
临床医学 | 131篇 |
内科学 | 127篇 |
皮肤病学 | 23篇 |
神经病学 | 48篇 |
特种医学 | 140篇 |
外科学 | 61篇 |
综合类 | 26篇 |
预防医学 | 45篇 |
眼科学 | 7篇 |
药学 | 86篇 |
肿瘤学 | 32篇 |
出版年
2022年 | 3篇 |
2021年 | 6篇 |
2019年 | 3篇 |
2018年 | 8篇 |
2016年 | 11篇 |
2015年 | 11篇 |
2014年 | 12篇 |
2013年 | 21篇 |
2012年 | 18篇 |
2011年 | 21篇 |
2010年 | 39篇 |
2009年 | 30篇 |
2008年 | 34篇 |
2007年 | 76篇 |
2006年 | 28篇 |
2005年 | 22篇 |
2004年 | 24篇 |
2003年 | 22篇 |
2002年 | 15篇 |
2001年 | 12篇 |
2000年 | 22篇 |
1999年 | 21篇 |
1998年 | 29篇 |
1997年 | 39篇 |
1996年 | 25篇 |
1995年 | 22篇 |
1994年 | 22篇 |
1993年 | 23篇 |
1992年 | 12篇 |
1991年 | 12篇 |
1990年 | 17篇 |
1989年 | 21篇 |
1988年 | 26篇 |
1987年 | 20篇 |
1986年 | 16篇 |
1985年 | 20篇 |
1984年 | 8篇 |
1983年 | 8篇 |
1982年 | 11篇 |
1981年 | 7篇 |
1980年 | 10篇 |
1978年 | 7篇 |
1977年 | 9篇 |
1976年 | 10篇 |
1975年 | 8篇 |
1974年 | 3篇 |
1973年 | 3篇 |
1972年 | 6篇 |
1971年 | 4篇 |
1967年 | 4篇 |
排序方式: 共有872条查询结果,搜索用时 15 毫秒
51.
52.
53.
Rapid communication: water disinfection by-products enhanced apoptotic activity in human lymphocytes
Racz G Sujbert L Bocsi J Szende B 《Journal of toxicology and environmental health. Part A》2004,67(17):1315-1319
The apoptosis-inducing activity of concentrated sediments of disinfected and non-disinfected water samples from the waterworks in Budapest, Hungary, was investigated using cultures of human peripherial blood lymphocytes. Chlorine-treated water and untreated (raw) water sediments were concentrated with the use of Amberlite XAD-2 resin columns. The concentrates were dissolved in dimethyl sulfoxide and added to cultures of human peripherial blood lymphocytes. Apoptotic index was determined in lymphocytes after treatment with the raw or disinfected concentrates by flow cytometry. Disinfected water concentrates of 100 microl/ml increased the apoptotic ratio of lymphocyte culture. The same amount of raw water concentrate also enhanced apoptosis. Both raw water and disinfected water contain substances that induced a significant rate of apoptosis in lymphocyte cultures. 相似文献
54.
Eisenblätter M Stahl-Hennig C Kuate S Stolte N Jasny E Hahn H Pope M Tenner-Racz K Racz P Steinman RM Uberla K Ignatius R 《Vaccine》2004,22(25-26):3295-3302
Granulocyte/macrophage-colony stimulating factor (GM-CSF) is a valuable adjuvant to enhance induction of cellular immune responses in rodents. Less information is available regarding its use as an adjuvant in primates or humans. We explored recombinant human GM-CSF for potential vaccine studies in rhesus macaques and focused on its effect on peripheral monocytes as progenitors of dendritic cells and its potential immunogenicity. Application of human GM-CSF to nine animals led to an average 32-fold increase in monocyte numbers. This was not observed upon re-treatment, which coincided with GM-CSF-specific neutralising antibodies. These also neutralised the activity of rhesus macaque GM-CSF. The data underscore the need to use species-specific GM-CSF for immunomodulation in primates. 相似文献
55.
Low back pain, with or without radicular symptoms, is a common medical condition. It can cause mild to severe suffering, high health costs, and disability. Most sufferers recover quickly and are left without sequelae. The less fortunate group of patients who do not improve despite conservative and mildly interventional therapy, find themselves in search of a more effective treatment. To enhance treatment outcome, an understanding of the pathophysiology of the underlying pain and the design of target-specific treatment modalities is important. 相似文献
56.
Card JW Racz WJ Brien JF Massey TE 《The Journal of pharmacology and experimental therapeutics》2003,304(1):277-283
Amiodarone (AM) is an efficacious antidysrhythmic agent that can cause numerous adverse effects, including potentially life-threatening pulmonary fibrosis. The current study was undertaken to investigate potential protective mechanisms of vitamin E against AM-induced pulmonary toxicity (AIPT) in the hamster. Three weeks after intratracheal administration of AM (1.83 micromol), increased pulmonary hydroxyproline content and histological damage were observed, indicative of fibrosis. These effects were preceded by increased pulmonary levels of transforming growth factor (TGF)-beta1 mRNA at 1 week post-AM, which remained elevated 3 weeks post-AM. Dietary supplementation with vitamin E resulted in rapid pulmonary accumulation of the vitamin, and prevention of AM-induced increases in TGF-beta1, hydroxyproline, and histological damage. Although dietary supplementation also markedly elevated lung mitochondrial vitamin E content, it did not attenuate AM-induced inhibition of mitochondrial respiration or disruption of mitochondrial membrane potential in vitro, or lung mitochondrial respiratory inhibition resulting from in vivo AM administration. These results suggest that vitamin E reduces the extent of pulmonary damage after AM administration via down-regulating TGF-beta1 overexpression but that it does not modify AM-induced mitochondrial dysfunction, a potential initiating event in AIPT. 相似文献
57.
58.
Gary S. Chong PhD Dennis Cogan PhD Patrick Randolph PhD Gabor Racz MD 《Pain practice》2001,1(4):338-343
Abstract: Higher self-efficacy (SE) is associated with lower pain ratings in chronic pain patients, although longer experience with chronic pain leads to lower SE scores. Self-efficacy in pain patients does not appear to be clearly related to sex or age, however. This study investigated the effects of gender, age, length of pain experience (chronicity) on SE and pain ratings.
Archival data from the records of 187 patient's charts were evaluated for demographic information, chronicity, pain ratings and SE. Analyses found a significant inverse relationship between SE and pain ratings (r = −.22) and lower SE for young adult patients. Results support the conclusion that enhanced SE is an important psychosocial intervention in the treatment of chronic pain patients. 相似文献
Archival data from the records of 187 patient's charts were evaluated for demographic information, chronicity, pain ratings and SE. Analyses found a significant inverse relationship between SE and pain ratings (r = −.22) and lower SE for young adult patients. Results support the conclusion that enhanced SE is an important psychosocial intervention in the treatment of chronic pain patients. 相似文献
59.
60.