全文获取类型
收费全文 | 618篇 |
免费 | 36篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 25篇 |
妇产科学 | 14篇 |
基础医学 | 80篇 |
口腔科学 | 7篇 |
临床医学 | 48篇 |
内科学 | 95篇 |
皮肤病学 | 11篇 |
神经病学 | 37篇 |
特种医学 | 164篇 |
外科学 | 26篇 |
综合类 | 15篇 |
一般理论 | 3篇 |
预防医学 | 16篇 |
眼科学 | 55篇 |
药学 | 22篇 |
1篇 | |
肿瘤学 | 26篇 |
出版年
2022年 | 4篇 |
2021年 | 8篇 |
2018年 | 9篇 |
2016年 | 11篇 |
2015年 | 14篇 |
2014年 | 6篇 |
2013年 | 13篇 |
2012年 | 15篇 |
2011年 | 15篇 |
2010年 | 11篇 |
2009年 | 15篇 |
2008年 | 13篇 |
2007年 | 13篇 |
2006年 | 15篇 |
2005年 | 15篇 |
2004年 | 9篇 |
2003年 | 16篇 |
2002年 | 12篇 |
2001年 | 22篇 |
2000年 | 13篇 |
1999年 | 19篇 |
1998年 | 22篇 |
1997年 | 25篇 |
1996年 | 21篇 |
1995年 | 22篇 |
1994年 | 20篇 |
1993年 | 21篇 |
1992年 | 6篇 |
1991年 | 4篇 |
1990年 | 13篇 |
1989年 | 21篇 |
1988年 | 24篇 |
1987年 | 19篇 |
1986年 | 21篇 |
1985年 | 23篇 |
1984年 | 5篇 |
1983年 | 5篇 |
1982年 | 4篇 |
1981年 | 8篇 |
1979年 | 8篇 |
1978年 | 10篇 |
1976年 | 8篇 |
1975年 | 10篇 |
1974年 | 6篇 |
1967年 | 4篇 |
1959年 | 4篇 |
1958年 | 4篇 |
1957年 | 3篇 |
1956年 | 4篇 |
1954年 | 3篇 |
排序方式: 共有655条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
Solitary bronchioloalveolar carcinoma: CT criteria 总被引:14,自引:0,他引:14
Kuhlman JE; Fishman EK; Kuhajda FP; Meziane MM; Khouri NF; Zerhouni EA; Siegelman SS 《Radiology》1988,167(2):379-382
The computed tomographic (CT) scans of 30 patients with solitary bronchioloalveolar carcinoma were reviewed. Common features at CT included the peripheral or subpleural location of a pulmonary mass (25 cases), pseudocavitation (18 cases), heterogeneous attenuation (17 cases), irregular margins forming a star pattern (22 cases), and pleural tags (21 cases). Using these CT criteria, four independent observers attempted to identify cases of bronchioloalveolar carcinoma from a larger sample of lung cancers and benign lesions by categorizing a series of test cases into four probability categories. Although the bronchioloalveolar carcinomas were correctly ranked in the two highest probability categories 75% of the time (in 45 of 60 cases), there was considerable overlap with other lung lesions, particularly with adenocarcinoma and large cell undifferentiated carcinoma. However, even though the typical features of bronchioloalveolar carcinoma are not invariable or highly specific, they are characteristic enough to suggest the diagnosis. 相似文献
6.
7.
8.
9.
10.
Abstract— The anticonvulsant action of midazolam and clonazepam was studied in 168 immature rats in three age groups (12, 18 and 25 days old). Epileptic after-discharges of the spike-and-wave type accompanied by clonic seizures of facial and forelimb muscles induced by stimulation of sensorimotor cortex were used as a model. The solvent used for clonazepam exhibited a tendency to anticonvulsant action in 12-day-old rats. On the contrary, a proconvulsant action was seen in 25-day-old animals. The action of both benzodiazepines was identical and did not change substantially during development. The highest dose used (1 mg kg?1, i.p.) shortened the duration of epileptic after-discharges, the two lower doses (0·1 and 0·02 mg kg?1, i.p.) suppressed the progressive prolongation with repeated stimulations seen under control conditions. Motor correlates of stimulation remained practically uninfluenced by the two benzodiazepines, myoclonic seizures accompanying epileptic after-discharges were attenuated by the highest dose of both drugs. 相似文献