全文获取类型
收费全文 | 985篇 |
免费 | 87篇 |
国内免费 | 35篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 53篇 |
妇产科学 | 9篇 |
基础医学 | 107篇 |
口腔科学 | 27篇 |
临床医学 | 137篇 |
内科学 | 222篇 |
皮肤病学 | 17篇 |
神经病学 | 25篇 |
特种医学 | 131篇 |
外科学 | 185篇 |
综合类 | 17篇 |
预防医学 | 42篇 |
眼科学 | 5篇 |
药学 | 83篇 |
肿瘤学 | 46篇 |
出版年
2022年 | 3篇 |
2021年 | 13篇 |
2020年 | 11篇 |
2019年 | 12篇 |
2018年 | 17篇 |
2017年 | 13篇 |
2016年 | 20篇 |
2015年 | 24篇 |
2014年 | 34篇 |
2013年 | 40篇 |
2012年 | 41篇 |
2011年 | 34篇 |
2010年 | 44篇 |
2009年 | 50篇 |
2008年 | 30篇 |
2007年 | 48篇 |
2006年 | 28篇 |
2005年 | 27篇 |
2004年 | 32篇 |
2003年 | 26篇 |
2002年 | 33篇 |
2001年 | 24篇 |
2000年 | 22篇 |
1999年 | 32篇 |
1998年 | 40篇 |
1997年 | 39篇 |
1996年 | 45篇 |
1995年 | 27篇 |
1994年 | 38篇 |
1993年 | 29篇 |
1992年 | 15篇 |
1991年 | 6篇 |
1990年 | 10篇 |
1989年 | 23篇 |
1988年 | 30篇 |
1987年 | 15篇 |
1986年 | 15篇 |
1985年 | 11篇 |
1984年 | 9篇 |
1983年 | 7篇 |
1982年 | 12篇 |
1981年 | 15篇 |
1980年 | 13篇 |
1979年 | 4篇 |
1978年 | 5篇 |
1977年 | 5篇 |
1976年 | 8篇 |
1975年 | 10篇 |
1969年 | 5篇 |
1910年 | 2篇 |
排序方式: 共有1107条查询结果,搜索用时 328 毫秒
1.
2.
3.
4.
5.
We used arthrotomography to study the glenoid labrum in 114 patients. Sixty-nine of the patients had anatomic instability of the shoulder (including recurrent dislocation and subluxation of the shoulder), and 45 patients had functional instability of the shoulder (denoted by chronic pain, clicking of the joint, and the sensation that an unstable condition exists without the objective signs of it). Labral tears were revealed arthrotomographically in 86% of the patients with anatomic instability, while only 40% of the patients with functional instability had labral abnormalities, and these were primarily of minor severity. Fifty-six patients (44 of whom had anatomic instability; 12, functional instability) required surgery. The surgical findings were correlated with the arthrotomographic findings, and no false-positive results were revealed. However, arthrotomography demonstrated only part of the pathologic condition of two patients. These results confirm that there is a strong correlation between labral pathologic conditions and anatomic instability of the shoulder. Arthrotomographic studies have a great impact on the selection of therapy in cases of both anatomic and functional instability of the shoulder. 相似文献
6.
Hausegger KA; Cragg AH; Lammer J; Lafer M; Fluckiger F; Klein GE; Sternthal MH; Pilger E 《Radiology》1994,190(1):199
7.
Rosenberg ZS; Jahss MH; Noto AM; Shereff MJ; Cheung Y; Frey CC; Norman A 《Radiology》1988,167(2):489-493
Computed tomography (CT) was performed in 42 patients with 49 clinically suspected tears of the posterior tibial tendon. Twenty-eight of the 49 suspected tears were subsequently surgically explored and repaired. Three patterns of tendon abnormalities were recognized on CT scans: type I-intact, hypertrophied, heterogeneous tendon; type II-attenuated tendon; and type III-absence of a portion of a tendon. Types I and II correlated with partial rupture seen during surgery, and type III correlated with complete rupture of the tendon. CT findings were accurate in 96% of the patients who underwent surgery. In four cases (14%), tendon rupture was seen on CT scans, but the extent of the injury was underestimated and the rupture was misclassified. Reactive periostitis of the distal tibia was seen in 71% of diseased tendons and may represent an important factor in the diagnosis of tendon rupture. 相似文献
8.
9.
P2-purinoceptor-mediated inhibition of noradrenaline release in rat atria. 总被引:5,自引:2,他引:3
下载免费PDF全文
![点击此处可从《British journal of pharmacology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
1. We looked for P2-purinoceptors modulating noradrenaline release in rat heart atria. Segments of the atria were preincubated with [3H]-noradrenaline and then superfused with medium containing desipramine (1 microM) and yohimbine (1 microM) and stimulated electrically, by 30 pulses/1 Hz unless stated otherwise. 2. The adenosine A1-receptor agonist, N6-cyclopentyl-adenosine (CPA; EC50 9.7 nM) and the nucleotides, ATP (EC50 6.6 microM) and adenosine-5'-O-(3-thiotriphosphate) (ATP gamma S; EC50 4.8 microM), decreased the evoked overflow of tritium. The adenosine A2a-agonist, 2-p-(2-carbonylethyl)-phenethylamino-5'-N-ethylcarboxamido-a denosine (CGS-21680; 0.03-0.3 microM) and the P2x-purinoceptor agonist beta, gamma-methylene-L-ATP (30 microM) caused no change. 3. The concentration-response curve of CPA was shifted to the right by the adenosine A1-receptor antagonist, 8-cyclopentyl-1,3-dipropyl-xanthine (DPCPX; 3 nM; apparent pKB value 9.7) but hardly affected by the P2-purinoceptor antagonist, cibacron blue 3GA (30 microM). In contrast, the concentration-response curves of ATP and ATP gamma S were shifted to the right by DPCPX (3 nM; apparent pKB values 9.3 and 9.4, respectively) as well as by cibacron blue 3GA (30 microM; apparent pKB values 5.0 and 5.1, respectively). Combined administration of DPCPX and cibacron blue 3GA caused a much greater shift of the concentration-response curve of ATP than either antagonist alone. The concentration-response curve of ATP was not changed by indomethacin, atropine or the 5'-nucleotidase blocker alpha, beta-methylene-ADP. 4. Cibacron blue 3GA (30 microM) increased the evoked overflow of tritium by about 70%.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
10.
Peroneus quartus muscle: MR imaging features 总被引:2,自引:0,他引:2