全文获取类型
收费全文 | 2286篇 |
免费 | 145篇 |
国内免费 | 13篇 |
专业分类
耳鼻咽喉 | 7篇 |
儿科学 | 47篇 |
妇产科学 | 43篇 |
基础医学 | 334篇 |
口腔科学 | 120篇 |
临床医学 | 264篇 |
内科学 | 388篇 |
皮肤病学 | 24篇 |
神经病学 | 130篇 |
特种医学 | 109篇 |
外科学 | 307篇 |
综合类 | 86篇 |
现状与发展 | 1篇 |
一般理论 | 3篇 |
预防医学 | 334篇 |
眼科学 | 33篇 |
药学 | 120篇 |
中国医学 | 1篇 |
肿瘤学 | 93篇 |
出版年
2023年 | 12篇 |
2022年 | 13篇 |
2021年 | 33篇 |
2020年 | 26篇 |
2019年 | 42篇 |
2018年 | 40篇 |
2017年 | 26篇 |
2016年 | 44篇 |
2015年 | 42篇 |
2014年 | 59篇 |
2013年 | 65篇 |
2012年 | 85篇 |
2011年 | 87篇 |
2010年 | 49篇 |
2009年 | 68篇 |
2008年 | 97篇 |
2007年 | 137篇 |
2006年 | 105篇 |
2005年 | 93篇 |
2004年 | 88篇 |
2003年 | 84篇 |
2002年 | 63篇 |
2001年 | 62篇 |
2000年 | 88篇 |
1999年 | 68篇 |
1998年 | 49篇 |
1997年 | 66篇 |
1996年 | 49篇 |
1995年 | 49篇 |
1994年 | 38篇 |
1993年 | 38篇 |
1992年 | 50篇 |
1991年 | 53篇 |
1990年 | 57篇 |
1989年 | 47篇 |
1988年 | 46篇 |
1987年 | 55篇 |
1986年 | 34篇 |
1985年 | 27篇 |
1984年 | 31篇 |
1983年 | 26篇 |
1982年 | 16篇 |
1980年 | 9篇 |
1979年 | 16篇 |
1978年 | 10篇 |
1975年 | 9篇 |
1974年 | 9篇 |
1973年 | 10篇 |
1971年 | 9篇 |
1970年 | 10篇 |
排序方式: 共有2444条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Neuronal activities following olfactory bulb electrical stimulation were examined before and after administration of dopamine and dopamine antagonist in the rat olfactory tubercle. The inhibitory response to olfactory bulb stimulation was attenuated by systemic haloperidol administration, but the excitatory response to olfactory bulb stimulation rarely was modulated. Topical application of dopamine by iontophoresis extended the duration of inhibition in 56% of the neurons sampled and diminished it in 25%; the excitatory response was modulated in 42% of neurons, most of which were attenuated. These findings suggest that dopamine in the olfactory tubercle could be involved in modulations of neuronal activities related to olfactory transduction. 相似文献
5.
This is an analysis of 37 previously untreated patients with squamous cell carcinoma of the maxillary sinus treated with curative intent at the University of Florida from January 1966 through January 1984. All patients were followed for at least two years and 86 per cent (32/27) were followed for a minimum of five years. Patients were treated for cure with radiation therapy alone (25), surgery alone (1), or surgery and preoperative (6) or postoperative (5) radiation therapy. This study presents the results of treatment and the incidence of treatment-related complications in this group of patients. 相似文献
6.
7.
Larry E. Davis Mario Kornfeld Herbert S. Mooney Kurt J. Fiedler Kathleen Y. Haaland William W. Orrison Elsa Cernichiari Thomas W. Clarkson 《Annals of neurology》1994,35(6):680-688
For 3 months in 1969 a family in the United States that included a pregnant mother consumed pork containing methylmercury. Children, aged 20, 13, and 8 years and a neonate, developed severe neurological signs. Twenty-two years later, the 2 oldest had cortical blindness or constricted visual fields, diminished hand proprioception, choreoathetosis, and atentional deficits. Magnetic resonance images showed tissue loss in the calcarine and parietal cortices and cerebellar folia. The youngest had quadriplegia, blindness, and severe mental retradation until their deaths. The brain of the 8-year-old who died at age 30 showed cortical atrophy, neuronal loss, and gliosis, most pronounced in the paracentral and parietooccipital regions. The total mercury level in formalin-fixed, left occipital cortex was 1,974 ng/gm as measured by atomic absorption. Regional brain mercury levels correlated with extent of brain damage. A control patient had 38.5 ng of mercury/gm in the occipital cortex. Systemic organs in the patient and a control subject had comparable mercury levels. In mercury-intoxicated rats, we found that only 5 to 10% of total brain mercury was lost by formalin fixation. Brain inorganic mercury in the patient ranged from 82 to 100%. Since inorganic mercury crosses the blood-brain barrier poorly, biotransformation of methyl to inorganic mercury may have occurred after methylmercury crossed the blood-brain barrier, accounting for its persistence in brain and causing part of the brain damage. 相似文献
8.
9.
10.