全文获取类型
收费全文 | 732篇 |
免费 | 51篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 36篇 |
妇产科学 | 19篇 |
基础医学 | 161篇 |
口腔科学 | 10篇 |
临床医学 | 77篇 |
内科学 | 107篇 |
皮肤病学 | 4篇 |
神经病学 | 116篇 |
特种医学 | 42篇 |
外科学 | 83篇 |
综合类 | 7篇 |
预防医学 | 29篇 |
眼科学 | 10篇 |
药学 | 34篇 |
肿瘤学 | 45篇 |
出版年
2021年 | 18篇 |
2020年 | 6篇 |
2019年 | 11篇 |
2018年 | 10篇 |
2017年 | 10篇 |
2016年 | 17篇 |
2015年 | 18篇 |
2014年 | 19篇 |
2013年 | 27篇 |
2012年 | 45篇 |
2011年 | 54篇 |
2010年 | 25篇 |
2009年 | 24篇 |
2008年 | 36篇 |
2007年 | 43篇 |
2006年 | 22篇 |
2005年 | 19篇 |
2004年 | 33篇 |
2003年 | 34篇 |
2002年 | 32篇 |
2001年 | 9篇 |
2000年 | 14篇 |
1999年 | 12篇 |
1998年 | 6篇 |
1997年 | 9篇 |
1996年 | 4篇 |
1994年 | 4篇 |
1993年 | 6篇 |
1992年 | 15篇 |
1991年 | 18篇 |
1990年 | 7篇 |
1989年 | 7篇 |
1988年 | 11篇 |
1987年 | 7篇 |
1986年 | 8篇 |
1985年 | 10篇 |
1984年 | 14篇 |
1983年 | 5篇 |
1981年 | 5篇 |
1980年 | 7篇 |
1979年 | 9篇 |
1978年 | 7篇 |
1977年 | 7篇 |
1976年 | 6篇 |
1975年 | 6篇 |
1974年 | 9篇 |
1973年 | 12篇 |
1972年 | 14篇 |
1970年 | 6篇 |
1967年 | 3篇 |
排序方式: 共有783条查询结果,搜索用时 281 毫秒
101.
H Somer M Kaste H Troupp A Konttinen 《Journal of neurology, neurosurgery, and psychiatry》1975,38(6):572-576
Severe cold injury of the brain increased significantly both total creatine kinase and the corresponding brain isoenzyme (CKBB) activity in confluens sinuum samples. CKBB could be detected also in peripheral blood a few hours after severe brain injury in eight of 12 patients. Finding of CKBB in human plasma may prove a useful indicator of severe brain injury. 相似文献
102.
Duchenne erythrocytes showed increased osmotic fragility as compared to controls (p less than 0.01), but individual values overlapped with controls, and only half of the Duchenne erythrocyte values were abnormal. When the effect of the smaller mean corpuscular volume of Duchenne erythrocytes was taken into account, there was no significant difference from controls in membrane deformability, as determined by microsieving or flow channel measurements. The increased osmotic fragility suggests minor changes in erythrocyte membrane properties in Duchenne muscular dystrophy. 相似文献
103.
104.
105.
Monoclonal IgG gammopathy of the lambda light-chain type was detected in a 51-year-old woman who had unexplained fever, muscle fatigue, and myalgia. One year later, myasthenia gravis was diagnosed. There was no evidence of myelomatosis or other malignancy. On the assumption that her M-component (gammopathic paraprotein) was related to myasthenia, she was treated with melphalan and cyclophosphamide, but her clinical condition was not improved. Despite therapeutic trials of other agents and a time course of 6 years, the quantity of the M-component remained unchanged. Serum AChR antibody activity was not located in the paraprotein peak. The findings do not support a relationship between the M-component and myasthenia gravis. 相似文献
106.
107.
Congenital fiber type disproportion in an adult: a morphometric and microchemical study 总被引:1,自引:0,他引:1
A 20-year-old man with marfanoid habitus had a history of congenital hypotonia and muscle weakness. Muscle biopsy showed extreme fiber type disproportion. There was total absence of Type 2B fibers. The severely hypertrophic Type 2A fibers showed twice the normal concentration of creatine phosphate at rest. These advanced morphometric, histochemical and biochemical changes may be interpreted as compensatory phenomena, which may explain the patient's pronounced functional improvement with advancing age. 相似文献
108.
Leino MS Alenius HT Fyhrquist-Vanni N Wolff HJ Reijula KE Hintikka EL Salkinoja-Salonen MS Haahtela T Mäkelä MJ 《American journal of respiratory and critical care medicine》2006,173(5):512-518
RATIONALE: Exposure to building dampness, often associated with growth of microbes such as Stachybotrys chartarum, has been linked to respiratory symptoms. We have shown previously in a murine model that exposure to S. chartarum can induce lung inflammation characterized by infiltration of neutrophils and lymphocytes; this process is regulated by proinflammatory cytokines and leucocyte-attracting chemokines. OBJECTIVES: Because an atopic predisposition may influence the response to microbes, we examined the effects of S. chartarum on allergic mice in an experimental model. BALB/c mice were sensitized to ovalbumin by intraperitoneal injections and exposed for 3 wk to spores of S. chartarum. MEASUREMENTS AND MAIN RESULTS: Numbers of eosinophils and neutrophils were drastically increased in bronchoalveolar fluid from these mice as compared with the ovalbumin-sensitized/challenged mice or those exposed to S. chartarum without ovalbumin sensitization. Histologic sections showed severe granulomatous inflammatory cell infiltrates in all compartments of the lung, including peribronchial, perivascular, and alveolar spaces. The mRNA levels of proinflammatory cytokines interleukin-1beta and tumor necrosis factor alpha and the chemokine CCL3/MIP-1alpha were also markedly increased in the lungs. Despite the enhancement of the pulmonary inflammatory reaction, exposure to S. chartarum spores significantly down-regulated airway hyperresponsiveness and showed a tendency to decrease levels of Th2 cytokines in the lung. CONCLUSION: Exposure to S. chartarum modulates the inflammatory reaction and airway hyperresponsiveness, depending on the allergic status of the exposed mice. 相似文献
109.
Alice Lepelley Erika Della Mina Erika Van Nieuwenhove Lise Waumans Sylvie Fraitag Gillian I. Rice Ashish Dhir Marie-Louise Frmond Mathieu P. Rodero Luis Seabra Edwin Carter Christine Bodemer Daniela Buhas Bert Callewaert Pascale de Lonlay Lien De Somer David A. Dyment Fran Faes Lucy Grove Simon Holden Marie Hully Manju A. Kurian Hugh J. McMillan Kristin Suetens Henna Tyynismaa Stphanie Chhun Timothy Wai Carine Wouters Brigitte Bader-Meunier Yanick J. Crow 《The Journal of experimental medicine》2021,218(10)
Mitochondrial DNA (mtDNA) has been suggested to drive immune system activation, but the induction of interferon signaling by mtDNA has not been demonstrated in a Mendelian mitochondrial disease. We initially ascertained two patients, one with a purely neurological phenotype and one with features suggestive of systemic sclerosis in a syndromic context, and found them both to demonstrate enhanced interferon-stimulated gene (ISG) expression in blood. We determined each to harbor a previously described de novo dominant-negative heterozygous mutation in ATAD3A, encoding ATPase family AAA domain–containing protein 3A (ATAD3A). We identified five further patients with mutations in ATAD3A and recorded up-regulated ISG expression and interferon α protein in four of them. Knockdown of ATAD3A in THP-1 cells resulted in increased interferon signaling, mediated by cyclic GMP-AMP synthase (cGAS) and stimulator of interferon genes (STING). Enhanced interferon signaling was abrogated in THP-1 cells and patient fibroblasts depleted of mtDNA. Thus, mutations in the mitochondrial membrane protein ATAD3A define a novel type I interferonopathy. 相似文献
110.
Esther Mena Rikard Owenius Baris Turkbey Richard Sherry Gennady Bratslavsky Sven Macholl Matthew P. Miller Ed J. Somer Liza Lindenberg Stephen Adler Joanna Shih Peter Choyke Karen Kurdziel 《European journal of nuclear medicine and molecular imaging》2014,41(10):1879-1888