全文获取类型
收费全文 | 697篇 |
免费 | 14篇 |
国内免费 | 28篇 |
专业分类
耳鼻咽喉 | 13篇 |
儿科学 | 19篇 |
妇产科学 | 2篇 |
基础医学 | 163篇 |
口腔科学 | 21篇 |
临床医学 | 127篇 |
内科学 | 105篇 |
皮肤病学 | 4篇 |
神经病学 | 19篇 |
特种医学 | 21篇 |
外科学 | 53篇 |
综合类 | 8篇 |
预防医学 | 47篇 |
眼科学 | 24篇 |
药学 | 95篇 |
肿瘤学 | 18篇 |
出版年
2021年 | 6篇 |
2020年 | 11篇 |
2019年 | 7篇 |
2018年 | 12篇 |
2016年 | 9篇 |
2015年 | 6篇 |
2014年 | 7篇 |
2013年 | 10篇 |
2012年 | 18篇 |
2011年 | 29篇 |
2010年 | 9篇 |
2009年 | 14篇 |
2008年 | 22篇 |
2007年 | 37篇 |
2006年 | 23篇 |
2005年 | 25篇 |
2004年 | 12篇 |
2003年 | 12篇 |
2002年 | 18篇 |
2001年 | 18篇 |
2000年 | 16篇 |
1999年 | 7篇 |
1996年 | 11篇 |
1995年 | 13篇 |
1993年 | 9篇 |
1992年 | 16篇 |
1991年 | 24篇 |
1990年 | 29篇 |
1989年 | 25篇 |
1988年 | 21篇 |
1987年 | 21篇 |
1986年 | 13篇 |
1985年 | 19篇 |
1984年 | 12篇 |
1983年 | 10篇 |
1982年 | 10篇 |
1980年 | 8篇 |
1979年 | 16篇 |
1978年 | 9篇 |
1977年 | 6篇 |
1976年 | 6篇 |
1975年 | 10篇 |
1974年 | 13篇 |
1973年 | 14篇 |
1972年 | 18篇 |
1971年 | 8篇 |
1970年 | 6篇 |
1969年 | 11篇 |
1967年 | 7篇 |
1965年 | 6篇 |
排序方式: 共有739条查询结果,搜索用时 46 毫秒
41.
42.
Developmental changes in GABAergic actions and seizure susceptibility in the rat hippocampus 总被引:14,自引:0,他引:14
Khazipov R Khalilov I Tyzio R Morozova E Ben-Ari Y Holmes GL 《The European journal of neuroscience》2004,19(3):590-600
The immature brain is prone to seizures but the underlying mechanisms are poorly understood. We explored the hypothesis that increased seizure susceptibility during early development is due to the excitatory action of GABA. Using noninvasive extracellular field potential and cell-attached recordings in CA3 of Sprague-Dawley rat hippocampal slices, we compared the developmental alterations in three parameters: excitatory actions of GABA, presence of the immature pattern of giant depolarizing potentials (GDPs) and severity of epileptiform activity generated by high potassium. The GABA(A) receptor agonist isoguvacine increased firing of CA3 pyramidal cells in neonatal slices while inhibiting activity in adults. A switch in the GABA(A) signalling from excitation to inhibition occurred at postnatal day (P) 13.5 +/- 0.4. Field GDPs were present in the form of spontaneous population bursts until P12.7 +/- 0.3. High potassium (8.5 mm) induced seizure-like events (SLEs) in 35% of slices at P7-16 (peak at P11.3 +/- 0.4), but only interictal activity before and after that age. The GABA(A) receptor antagonist bicuculline reduced the frequency or completely blocked SLEs and induced interictal clonic-like activity accompanied by a reduction in the frequency but an increase in the amplitude of the population spikes. In slices with interictal activity, bicuculline typically caused a large amplitude interictal clonic-like activity at all ages; in slices from P5-16 rats it was often preceded by one SLE at the beginning of bicuculline application. These results suggest that, in the immature hippocampus, GABA exerts dual (both excitatory and inhibitory) actions and that the excitatory component in the action of GABA may contribute to increased excitability during early development. 相似文献
43.
Prokhonchukov AA Zhizhina NA Kolesnik AG Morozova NV Vasmanova EV Mozgovaia LA Kunin AA Milokhova EP Saprykina VA Nazyrov IuS Kulazhenko TV Semenova LL Ermolov VV Chuprakova EV 《Stomatologii?a》2002,81(5):29-35
Alternative methods for prevention and treatment of dental caries are presented, based on the use of laser and magnetic laser exposure (patent No. 2053818, in Russia) with a new generation laser device with Optodan microprocessor monitoring (patent No. 2014107, Russia). The methods are intended for wide clinical application in children and adolescents in pedodontic departments and outpatient centers and particularly for group and individual use in dental rooms at school. 相似文献
44.
45.
Tikunova NV Morozova VV Batanova TA Belanov EF Bormotov NI Ilyichev AA 《Human antibodies》2001,10(3-4):95-99
The library of human scFv antibodies displayed on the surface of bacteriophages was panned against Vaccinia virus (VACV), strain Elstree. 75% binding with Vaccinia virus. 5 clones were characterized for their binding with VACV and their ability to neutralize VACV in plaque reduction neutralization test (PRNT). Antibodies from the clones were obtained as soluble individual molecules and their binding activities were confirmed in ELISA. 相似文献
46.
47.
48.
49.
50.