全文获取类型
收费全文 | 93255篇 |
免费 | 8531篇 |
国内免费 | 4717篇 |
专业分类
耳鼻咽喉 | 934篇 |
儿科学 | 1592篇 |
妇产科学 | 1542篇 |
基础医学 | 9824篇 |
口腔科学 | 1833篇 |
临床医学 | 11669篇 |
内科学 | 14051篇 |
皮肤病学 | 1695篇 |
神经病学 | 4046篇 |
特种医学 | 3563篇 |
外国民族医学 | 25篇 |
外科学 | 9017篇 |
综合类 | 15147篇 |
现状与发展 | 20篇 |
一般理论 | 9篇 |
预防医学 | 7720篇 |
眼科学 | 2305篇 |
药学 | 10033篇 |
86篇 | |
中国医学 | 5390篇 |
肿瘤学 | 6002篇 |
出版年
2024年 | 278篇 |
2023年 | 1230篇 |
2022年 | 2986篇 |
2021年 | 4162篇 |
2020年 | 3121篇 |
2019年 | 2671篇 |
2018年 | 2766篇 |
2017年 | 2835篇 |
2016年 | 2680篇 |
2015年 | 4181篇 |
2014年 | 5278篇 |
2013年 | 5719篇 |
2012年 | 8256篇 |
2011年 | 8528篇 |
2010年 | 6120篇 |
2009年 | 5097篇 |
2008年 | 6021篇 |
2007年 | 5662篇 |
2006年 | 5528篇 |
2005年 | 4810篇 |
2004年 | 3533篇 |
2003年 | 3062篇 |
2002年 | 2682篇 |
2001年 | 1776篇 |
2000年 | 1506篇 |
1999年 | 1219篇 |
1998年 | 558篇 |
1997年 | 601篇 |
1996年 | 432篇 |
1995年 | 367篇 |
1994年 | 338篇 |
1993年 | 211篇 |
1992年 | 363篇 |
1991年 | 337篇 |
1990年 | 270篇 |
1989年 | 216篇 |
1988年 | 172篇 |
1987年 | 157篇 |
1986年 | 124篇 |
1985年 | 85篇 |
1984年 | 67篇 |
1983年 | 46篇 |
1982年 | 53篇 |
1981年 | 50篇 |
1980年 | 45篇 |
1979年 | 53篇 |
1978年 | 45篇 |
1977年 | 26篇 |
1975年 | 26篇 |
1974年 | 22篇 |
排序方式: 共有10000条查询结果,搜索用时 13 毫秒
51.
Interleukin-5 has a specific role in various eosinophilic activities. It is the predominant cytokine produces by activated T-lymphocytes isolated from patients with idiopathic hypereosinophilic syndrome. We studied a young patient suffering from idiopathic hypereosinophilic syndrome who presented with Horner's syndrome, peripheral neuropathy and skin ulcers. The IL-5 gene expression by CD4+ T-lymphocytes and the peripheral eosinophil count were raised. The skin ulcers continued to deteriorate despite a swift reduction of the IL-5 gene expression and peripheral eosinophil count following systemic corticosteroid treatment. We suggest that peripheral eosinophilia may not be responsible for the damage in skin lesions and more aggressive treatment may be required. 相似文献
52.
Patient Liu (a male office worker of a company in Beijing), aged 49, paid his first visit on March 10, 2003, with the chief complaint of frequent urination at night for over one year. One year ago, he started to have frequent urination 4-5 times every night, which disturbed his sleep and made him fatigue during the day. Though he tried to drink less water, the above symptoms couldn't be alleviated. The condition was accompanied by such symptoms as listlessness, general lassitude, 相似文献
53.
Raymond J. Lawrence D.Min. 《Annals of behavioral medicine》2002,24(1):74-76
Recent proposals to join spirituality and medicine are facile and ill defined. The notion that physicians have the time or
training to make assessments and recommendations about spirituality is misguided. Whenever a physician demonstrates personal
caring for a patient, the healing process is likely enhanced, and in that sense, physicians often promote the spirituality
of the patient. However, recent proposals to extend the physician’s task to that of assessing religion and directing the patient
toward approved forms of spirituality are inappropriate. The languages of religion and science are radically different. The
cultural body-mind split will not be solved by such simplistic solutions as having physicians endorse spirituality, which
will result only in denigration of both medicine and religion. Physicians are encouraged to rely on clinically trained ministers
for assistance in understanding the patient’s state of mind or spirit and its possible effects on the course of illness and
health. 相似文献
54.
Marina Quartu Maria Pina Serra Annalisa Manca Paolo Follesa Maria Letizia Lai Marina Del Fiacco 《International journal of developmental neuroscience》2003,21(1):23-33
The immunohistochemical occurrence of the neurotrophin (NT) proteins nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), neurotrophin-4 (NT-4), and neurotrophin-3 (NT-3) is shown in the pre-term newborn, infant, and adult human post-mortem cerebellum. The NT-like immunoreactive structures were unevenly distributed and showed regional differences among cerebellar lobules and folia. NGF-, NT-4-, and NT-3-positive neuronal perikarya were observed in all specimens examined. At variance with the other neurotrophins, the BDNF antiserum labelled neuronal cell bodies only in newborn life and infancy, as well as extensive nerve fibre systems, whose density increased with age. The NT-antibodies, tested by Western blot on human cerebellum homogenates, revealed immunoreactive bands corresponding to proteins of heterogenous molecular weight. The results obtained provide a first demonstration of the tissue localization of the NTs in the human cerebellum from perinatal to adult age, thus suggesting their involvement in the development, differentiation and maintenance of the cerebellar connectivity. Codistribution of the four NTs or sets of them was observed in cortical and deep nuclei neurons. Multiple trophic roles for NTs, encompassing the classic target-derived and local mechanisms of support, are envisaged as significant in development, differentiation, and maintenance of the human cerebellar connectivity. 相似文献
55.
56.
Hao Cheng Zhongyao Wu Jianliang Zheng Guilan Lu Jianhua Yan Min Liu Danping Huang Jianxian LinZhongshan Ophthalmic Center Sun Yat-sen University Guangzhou China 《眼科学报》2003,19(1):54-59
Purpose: To study the changes of telomerase activity and cytotoxic effects by Cisplatin; cis-dichlorodiamine platinum (CDDP) in cultured human choroidal melanoma. Material and Methods: The primary cultured human choroidal melanoma cells were cultured in the presence and absence of CDDP with different concentration and time respectively. The toxic effects were evaluated by MTT and the level of telormarse was detected by PCR-ELISA assay. And the relationship between telomerase activity and cytotoxic effects were analyzed by a correlation analysis.Results: Following the increase of the concentration and the time of CDDP, gradually repressed telomerase activity was detected in cultured cells. Meanwhile, the restrain rate of the cells increased. The telomerase activity at 24h and 1μg/ml was repressed significantly compared with the control cells. However, the appearance of cell death lagged behind the decreasing of telomerase.Conclusions: CDDP is an effective telomerase inhibitor in cultured choroidal melan 相似文献
57.
58.
目的:分析肾移植后免疫抑制剂对长期存活的影响,寻找移植后不同时间合适的免疫抑制用药方案及其用药剂量。 方法:对肾移植一年以上、肾功能正常的497例患者进行5年连续随访。根据移植后2、3、5年的不同免疫抑制用药将患者分为三联、二联、传统二联治疗三组。统计各组的排异发生率,排异和无排异患者免疫抑制用药的种类、剂量及CsA浓度,对排异患者追踪排异发生前12个月内的药物更动情况。 结果:肾移植后2、3、5 相似文献
59.
60.
H. Nishino Y. Oomura Z. Kardi S. Aou L. Lnrd Y. Kai A. Fukuda C. Ito B.I. Min C.P. Salamant 《Brain research bulletin》1988,20(6):839-845
Single neuron activities in the lateral hypothalamic area (LHA) were recorded during bar press feeding task in the monkey. First registered neurons were sorted into 2 groups, glucose-sensitive (GS) and glucose-insensitive (GIS) neurons, depending on their glucose sensitivity. Then firing variations to feeding, electrophoretically applied catecholamines and opiate, and to odor and taste stimuli were investigated. GS neurons responded to dopamine, noradrenaline and morphine more often than GIS neurons. In feeding task GS neurons responded during bar press (BP) and reward (RW) periods with long-lasting inhibition of firing and at cue tone (CT) with transient inhibition, while GIS neurons responded during BP and RW periods mainly with excitation and at cue light (CL) with excitation. A majority of GS neurons responded to both odor and taste stimuli more often than GIS neurons. Data suggest that these two kinds of neurons in the LHA may be involved in different functional aspects of feeding: GS neurons, mainly in internal information processing and reward mechanism, and GIS neurons, in external information processing and motor aspects. 相似文献