全文获取类型
收费全文 | 104篇 |
免费 | 10篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 4篇 |
妇产科学 | 1篇 |
基础医学 | 8篇 |
口腔科学 | 7篇 |
临床医学 | 22篇 |
内科学 | 35篇 |
皮肤病学 | 1篇 |
神经病学 | 4篇 |
特种医学 | 5篇 |
外科学 | 15篇 |
综合类 | 4篇 |
预防医学 | 1篇 |
药学 | 2篇 |
中国医学 | 1篇 |
肿瘤学 | 2篇 |
出版年
2022年 | 2篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 1篇 |
2018年 | 3篇 |
2017年 | 5篇 |
2016年 | 1篇 |
2015年 | 3篇 |
2014年 | 1篇 |
2013年 | 6篇 |
2012年 | 5篇 |
2011年 | 6篇 |
2010年 | 3篇 |
2009年 | 3篇 |
2008年 | 8篇 |
2007年 | 11篇 |
2006年 | 7篇 |
2005年 | 4篇 |
2004年 | 7篇 |
2003年 | 6篇 |
2002年 | 7篇 |
2001年 | 3篇 |
2000年 | 2篇 |
1998年 | 4篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1994年 | 1篇 |
1990年 | 1篇 |
1987年 | 2篇 |
1986年 | 1篇 |
1983年 | 1篇 |
1981年 | 2篇 |
1979年 | 1篇 |
1976年 | 2篇 |
排序方式: 共有114条查询结果,搜索用时 15 毫秒
91.
Wataru Kiyan Akira Ito Yasuaki Nakagawa Shogo Mukai Koji Mori Tatsuo Arai Eiichiro Uchino Yasushi Okuno Hiroshi Kuroki 《Ultrasound in medicine & biology》2017,43(8):1703-1715
We aimed to quantitatively investigate the relationship between amplitude-based pulse-echo ultrasound parameters and early degeneration of the knee articular cartilage. Twenty samples from six human femoral condyles judged as grade 0 or 1 according to International Cartilage Repair Society grading were assessed using a 15-MHz pulsed-ultrasound 3-D scanning system ex vivo. Surface roughness (Rq), average collagen content (A1) and collagen orientation (A12) in the superficial zone of the cartilage were measured via laser microscopy and Fourier transform infrared imaging spectroscopy. Multiple regression analysis with a linear mixed-effects model (LMM) revealed that a time-domain reflection coefficient at the cartilage surface (Rc) had a significant coefficient of determination with Rq and A12 (); however, Rc did not correlate with A1. Concerning the collagen characteristic in the superficial zone, Rc was found to be a sensitive indicator reflecting collagen disorganization, not collagen content, for the early degeneration samples. 相似文献
92.
Our knowledge about pulmonary complications of Beh?et's disease continues to evolve, but we need controlled trials for the management of the disease. The main goal should be to elucidate the pathogenesis and standardize the management according to the underlying pathologic process. 相似文献
93.
Report is given about a case of Ptyalismus gravidarum. The data found in literature about the theories of etiology and the possibilities of therapy are discussed. The use of psycho-therapy is advised. 相似文献
94.
Gadow EC; Paz JE; Lopez-Camelo JS; Dutra MG; Queenan JT; Simpson JL; Jennings VH; Castilla EE 《Human reproduction (Oxford, England)》1998,13(7):1991-1995
Unintended pregnancies are accepted as associated with social, maternal and
perinatal risks, but few data exist in South America. In a selected network
of hospitals participating in the ECLAMC (Spanish acronym for Latin
American Collaborative Study of Congenital Malformations), the frequency of
unintended pregnancies was 49.8% in 5155 mothers of normal liveborns, as
interviewed in the post-partum period (1992-1994). Compared with the
intended pregnancy group, these mothers were more frequently multiparous,
conceived easily, had a surprisingly higher mean maternal age, lower
educational level, and Black ancestors. The frequency of mistimed
pregnancies was the highest among primiparae. No adverse perinatal outcome
could be found with regard to low birthweight (< 2500 g), prematurity
(< 37 weeks), and early neonatal death. The rates of Caesarean delivery,
twinning and sex ratio were similar in intended and unintended groups.
Logistic regression analysis showed that maternal education could be a
confounding factor associated with other maternal variables. The rate of
unintended pregnancies in the present study is significantly higher than
that described for other regions. Knowledge of the characteristics of women
experiencing unintended pregnancies would allow proper public health
strategies.
相似文献
95.
96.
97.
98.
The influence of internal surface treatments on tensile bond strength for two ceramic systems 总被引:3,自引:0,他引:3
STATEMENT OF THE PROBLEM: The ceramic composition and surface microstructure of all-ceramic restorations are important components of an effective bonding substrate. Hydrofluoric acid and sandblasting are well-known procedures for surface treatment; however, surface treatment for high alumina-containing and lithium disilicate ceramics have not been fully investigated. PURPOSE: This in vitro study evaluated the tensile bond strength of resin cement to two types of ceramic systems with different surface treatments. METHODS AND MATERIALS: Thirty specimens of each ceramic system were made according to the manufacturer's instructions and embedded in polyester resin. Specimens of In-Ceram Alumina [I] and IPS Empress 2 [E] were distributed to three groups with differing surface treatments (n = 10): sandblasting with 50 microm aluminum oxide (APA); sandblasting with 110 microm aluminum oxide modified with silica particles (ROCATEC System-RS); a combination of sandblasting with APA and 10% hydrofluoric acid etching (HA) for two minutes on In-Ceram and for 20 seconds for IPS Empress 2. After the respective surface treatments, all the specimens were silanated, and Rely-X resin cement was injected onto the ceramic surface and light polymerized. The specimens were stored in distilled water at 37 degrees C for 24 hours and thermally cycled 1,100 times (5 degrees C/55 degrees C). The tensile bond strength test was performed in a universal testing machine at a 0.5 mm/minute crosshead speed. RESULTS: The mean bond strength values (MPa) for IPS Empress 2 were 12.01 +/- 5.93 (EAPA), 10.34 +/- 1.77 (ERS) and 14.49 +/- 3.04 (EHA). The mean bond strength values for In-Ceram Alumina were 9.87 +/- 2.40 (IAPA) and 20.40 +/- 6.27 (IRS). All In-Ceram specimens treated with 10% hydrofluoric acid failed during thermal cycling. CONCLUSION: The Rocatec system was the most effective surface treatment for In-Ceram Alumina ceramics; whereas, the combination of aluminum oxide sandblasting and hydrofluoric acid etching for 20 seconds worked more effectively for Empress 2 ceramics. 相似文献
99.
De Novo Cerebral Arteriovenous Malformation: Pink Floyd's Song “Brick in the Wall” as a Warning Sign
Murat Ozsarac Ersin Aksay Selahattin Kiyan Orkun Unek F. Feray Gulec 《The Journal of emergency medicine》2012
Background: Arteriovenous malformations are shunts between an artery and the venous system that lie within a nidus without an intervening capillary bed. These lesions are thought to be congenital, but recent reports have challenged this assumption. Case Report: A 50-year-old man presented to the emergency department with a generalized tonic-clonic seizure. Before the onset of his seizure, he experienced a vivid auditory hallucination of his favorite song by the band Pink Floyd, “A Brick in the Wall.” He had been diagnosed with epilepsy 25 years previously. On presentation, his neurological examination was normal, but a computed tomography scan of the brain revealed a large arteriovenous malformation (AVM) occupying the left temporal lobe. Upon more detailed questioning, he recalled that a brain angiogram had been performed 25 years before and was reported to be normal. Neurosurgery was not performed in view of the size of the malformation. The patient is being followed-up as an outpatient. Conclusion: AVMs may arise de novo and then spontaneously become symptomatic. Cerebral de novo AVM should be considered in the differential diagnosis in patients with complex auditory musical hallucinations or any new neuropsychiatric symptoms. 相似文献
100.
Gursu Kiyan Basar Gocmen Fazilet Karakoc Tolga E. Dagli 《International journal of pediatric otorhinolaryngology》2009,73(7):963-967