全文获取类型
收费全文 | 504篇 |
免费 | 29篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 59篇 |
妇产科学 | 12篇 |
基础医学 | 39篇 |
口腔科学 | 29篇 |
临床医学 | 69篇 |
内科学 | 95篇 |
皮肤病学 | 24篇 |
神经病学 | 35篇 |
特种医学 | 15篇 |
外科学 | 54篇 |
综合类 | 15篇 |
预防医学 | 15篇 |
眼科学 | 5篇 |
药学 | 37篇 |
中国医学 | 7篇 |
肿瘤学 | 14篇 |
出版年
2023年 | 3篇 |
2022年 | 3篇 |
2021年 | 12篇 |
2020年 | 6篇 |
2019年 | 8篇 |
2018年 | 12篇 |
2017年 | 12篇 |
2016年 | 15篇 |
2015年 | 26篇 |
2014年 | 29篇 |
2013年 | 37篇 |
2012年 | 47篇 |
2011年 | 55篇 |
2010年 | 18篇 |
2009年 | 28篇 |
2008年 | 35篇 |
2007年 | 41篇 |
2006年 | 35篇 |
2005年 | 50篇 |
2004年 | 21篇 |
2003年 | 10篇 |
2002年 | 18篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有534条查询结果,搜索用时 15 毫秒
1.
S. Süreyya
zbek Remide Arkun Refik Killi Ayenur Memi Aynur Dadeviren Erkan Sevin 《Journal of clinical ultrasound : JCU》1995,23(4):233-238
Image-directed color Doppler ultrasonography (ICDUS) studies of 86 patients with superficial solid masses yielded significantly lower resistive index (RI) values in acute inflammatory lesions, but no significant difference between the maximum systolic flow velocities (S) of the patient groups with malignant, benign, and acute inflammatory lesions. When analyzed separately, the malignant soft-tissue tumor subgroup was shown to have significantly higher mean RI compared to that of the malignant node subgroup. We conclude that RI may be useful in the differentiation of acute inflammatory masses from other pathological entities. Malignant soft-tissue tumors, especially sarcomas, may have different Doppler features from those of carcinomatous tumors. © 1995 John Wiley & Sons, Inc. 相似文献
2.
3.
4.
The potential use of unmanned aircraft systems (drones) in mountain search and rescue operations 总被引:4,自引:0,他引:4
Yunus Karaca Mustafa Cicek Ozgur Tatli Aynur Sahin Sinan Pasli Muhammed Fatih Beser Suleyman Turedi 《The American journal of emergency medicine》2018,36(4):583-588
Objective
This study explores the potential use of drones in searching for and locating victims and of motorized transportation of search and rescue providers in a mountain environment using a simulation model.Methods
This prospective randomized simulation study was performed in order to compare two different search and rescue techniques in searching for an unconscious victim on snow-covered ground. In the control arm, the Classical Line Search Technique (CLT) was used, in which the search is performed on foot and the victim is reached on foot. In the intervention arm, the Drone-snowmobile Technique (DST) was used, the search being performed by drone and the victim reached by snowmobile. The primary outcome of the study was the comparison of the two search and rescue techniques in terms of first human contact time.Results
Twenty search and rescue operations were conducted in this study. Median time to arrival at the mannequin was 57.3 min for CLT, compared to 8.9 min for DST. The median value of the total searched area was 88,322.0 m2 for CLT and 228,613.0 m2 for DST. The median area searched per minute was 1489.6 m2 for CLT and 32,979.9 m2 for DST (p < 0.01 for all comparisons).Conclusions
In conclusion, a wider area can be searched faster by drone using DST compared to the classical technique, and the victim can be located faster and reached earlier with rescuers transported by snowmobile. 相似文献5.
6.
Erkan Cure Medine C. Cure Levent Tumkaya Yildiray Kalkan Ibrahim Aydin Aynur Kirbas Arif Yilmaz Suleyman Yuce Mehmet F. Gokce 《Saudi Journal Of Gastroenterology》2014,20(5):297-303
Background and Aim:
Ischemia/reperfusion (I/R) injury in the liver occurs after a prolonged period of ischemia followed by restoration of hepatic blood perfusion. During the surgery of abdominal aorta, I/R injury causes damage to lower extremities and many organs, especially liver. The antioxidant and tumor necrosis factor-alpha (TNF-α) suppression effects of topiramate (TPM) have been reported in several studies. We evaluated the potential protective effect of TPM on cellular damage in liver tissue during I/R injury.Materials and Methods:
Thirty male Wistar albino rats were divided into three groups: Control, I/R, and I/R plus TPM (I/R + TPM) groups. Laparotomy without I/R injury was performed in the control group. After laparotomy, cross-ligation of infrarenal abdominal aorta was applied for 2 h in I/R groups that was followed by 2 h of reperfusion. TPM (100 mg/kg/day) was orally administrated to the animals in the I/R + TPM group for seven consecutive days before I/R procedure.Results:
The I/R group''s TNF-α and interleukin-6 (IL-6) levels were significantly higher than those of the control (P = 0.010; P = 0.002) and I/R + TPM groups (P = 0.010; P = 0.002, respectively). Asymmetric dimethyl arginine (ADMA) levels of I/R group were higher than the control (P = 0.015) and I/R + TPM groups. I/R caused serious histopathological damage to liver tissue; however, TPM led to very low histopathological changes.Conclusion:
Our data demonstrated that TPM treatment prominently decreases the severity of liver I/R injury. TPM pretreatment may have preventive effects on liver injury via I/R during intra-abdominal surgery. 相似文献7.
Yeliz Pekcevik MD Aynur Pasinli MD Esra Arun Ozer MD Nuri Erdogan MD 《Iranian journal of pediatrics.》2014,24(2):191-197
Objective
To determine whether some clinical parameters can be used to predict the hemorrhage and whether the relationship between these clinical variables and the grades of hemorrhage is linear.Methods
A total of 230 premature infants, born at a gestational age less than 34 weeks were retrospectively reviewed. Germinal matrix-intraventricular hemorrhage (GM-IVH), the grade of the hemorrhage, and clinical data were assessed with a checklist. Variables were analyzed by using Mann Whitney U and Fisher’s exact tests and then multiple logistic regression analysis was used to evaluate the independent risk factors.Findings
Resuscitation, gestational age, hypotension, multiple birth, and birth weight were found to be independent risk factors. We determined non-linear relationship between the grades of hemorrhage and the clinical parameters. But when we classified hemorrhages as grade 1, grade 2-3 and grade 4, the relationships were found linear.Conclusion
Premature infants who had resuscitation, low gestational age, hypotension, multiple birth, and low birth weight are more likely to have GM-IVH. The relationship between the clinical variables and the grades of GM-IVH does not seem to be linear. 相似文献8.
9.