全文获取类型
收费全文 | 527篇 |
免费 | 53篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 60篇 |
妇产科学 | 15篇 |
基础医学 | 42篇 |
口腔科学 | 39篇 |
临床医学 | 55篇 |
内科学 | 115篇 |
皮肤病学 | 15篇 |
神经病学 | 40篇 |
特种医学 | 13篇 |
外科学 | 85篇 |
综合类 | 10篇 |
预防医学 | 15篇 |
眼科学 | 29篇 |
药学 | 25篇 |
中国医学 | 5篇 |
肿瘤学 | 17篇 |
出版年
2023年 | 15篇 |
2022年 | 17篇 |
2021年 | 36篇 |
2020年 | 17篇 |
2019年 | 19篇 |
2018年 | 21篇 |
2017年 | 25篇 |
2016年 | 39篇 |
2015年 | 33篇 |
2014年 | 41篇 |
2013年 | 52篇 |
2012年 | 43篇 |
2011年 | 35篇 |
2010年 | 24篇 |
2009年 | 21篇 |
2008年 | 25篇 |
2007年 | 43篇 |
2006年 | 20篇 |
2005年 | 21篇 |
2004年 | 21篇 |
2003年 | 10篇 |
2002年 | 6篇 |
1998年 | 1篇 |
1996年 | 1篇 |
排序方式: 共有586条查询结果,搜索用时 15 毫秒
1.
Karasu Buğra Gunay Betul Onal 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2020,258(1):99-106
Graefe's Archive for Clinical and Experimental Ophthalmology - To evaluate central macular thickness (CMT), subfoveal choroidal thickness (SFCT), and visual outcomes following different... 相似文献
2.
3.
Tarik Zafer Nursal Bulent Erdogan Turgut Noyan Melih Cekinmez Betul Atalay Nevzat Bilgin 《Journal of clinical neuroscience》2007,14(4):344-348
OBJECTIVE: Gastric paresis in traumatic brain injury (TBI) hinders the effectiveness of enteral support in this patient group. In this study we have investigated the effect of metoclopramide on gastric emptying in TBI patients. METHOD: In this prospective, randomized, controlled, double-blind study, 19 TBI patients with Glasgow Coma Scale scores of 3-11 were included. In all patients, enteral nutrition was commenced with a nasogastric feeding tube within 48 hours of trauma. Patients were randomized into two groups. In the metoclopramide (M) group, 10 mg metoclopramide was delivered intravenously three times daily for 5 days. In the control (C) group, an equal volume of saline was administered. Besides demographics, gastric emptying according to a paracetamol absorption test at days 0 and 5, time to reach target nutritional requirements, gastric residues, intolerance to feeding, nutritional complications, and clinical outcomes were recorded for each patient. RESULTS: The gastric residue rates were 2.7+/-7.4 mL and 8.1+/-17.7 mL per 100 patient days for groups C and M respectively (p=0.408). Similarly, feeding intolerance and complication rates did not significantly differ between groups C and M, (respectively p=0.543 and 0.930). Gastric emptying parameters also were similar between the study groups. CONCLUSION: We were unable to document any advantage to using metoclopramide in TBI patients. Simple intragastric enteral feeding with close monitoring of the possible complications seems to be sufficient with acceptable morbidity rates. 相似文献
4.
Glomerular changes in BK virus nephropathy 总被引:10,自引:0,他引:10
This study seeks to define the glomerular changes that are associated with human BK virus nephropathy (BKVN). It is based on histopathologic review of 124 biopsies showing light-microscopic changes of viral nephropathy. The diagnosis of BKVN was confirmed by immunohistochemistry or by in situ hybridization. Histological lesions were scored by the Banff 97 criteria for renal allograft pathology and were correlated with clinical parameters. Viral cytopathic effect in the parietal Bowman's capsular epithelium was seen in 21/124 (17%) biopsies. Immunohistochemistry showed infection of Bowman's capsular epithelium in an additional 15/124 (12%) biopsies. Crescents were found in 15/124 (12%) samples. Glomerulitis exceeding grade Banff g1 was only occasionally shown (4/124=3% biopsies). Other pathologic lesions documented include mild increase in mesangial matrix in 23% biopsies, aneurysmal dilatation of glomerular capillaries in 28%, ischemic glomerulopathy in 62%, and chronic transplant glomerulopathy graded as mild (cg1) in 62% of biopsies and as moderate (cg2) in 2/124 (1.9%) biopsies. These findings show that infection of the glomerular epithelium cells can occur in a subset of patients with BKVN, most often in biopsies with high viral load in the tubular epithelium. Isolated crescents can occur in BKVN biopsies, but rapidly progressive glomerulonephritis is not observed. Two biopsies showed electron-dense deposits on ultrastructural examination, but a cause and effect relationship to BK virus infection could not be established. 相似文献
5.
Joshua A. Kailin MD Alexia B. Santos MD Betul Yilmaz Furtun MD S. Kristen Sexson Tejtel MD PhD MPH Regina Lantin‐Hermoso MD 《Echocardiography (Mount Kisco, N.Y.)》2017,34(12):1768-1775
Isolated coarctation of the aorta (CoA) is estimated by the Centers for Disease Control and Prevention to account for 4%–6% of all congenital heart disease (CHD) in the United States, with a reported prevalence of ~4 per 10 000 live births. Prenatal recognition of coarctation is important as it may improve neonatal survival and reduce morbidity. However, despite advances in imaging and the trend toward detailed aortic arch assessment as part of a comprehensive fetal echocardiogram, isolated CoA may still elude prenatal detection, with potentially lethal consequences if the diagnosis is not suspected and the patent ductus arteriosus (PDA) closes spontaneously in postnatal life. The purpose of this review is to outline the methods of antenatal aortic arch evaluation in the current era, discuss “red flags” that raise the suspicion for CoA, including associated anomalies and serve as a repository of the most up to date information regarding its diagnosis in utero and its perinatal management. Other aortic arch abnormalities, such as interrupted aortic arch, or CoA associated with complex single ventricles, are not included in this review. 相似文献
6.
Elif Ozalkaya Sevgi Mir Betul Sozeri Afig Berdeli Fatma Mutlubas Alphan Cura 《Rheumatology international》2011,31(6):779-784
Familial Mediterranean fever (FMF) is a disease characterized by recurrent, self-limiting fever and serositis and caused by
altered pyrin due to mutated MEFV gene. The aim of this study was to investigate clinical manifestations and MEFV mutations
among patients with FMF and healthy controls in the Aegean region of Turkey. This study included 308 patients and 164 healthy
controls. Patients were divided into three groups according to Tel-Hashomer criteria; definitive, probable, and suspicious.
Among the patients, 146 were women (47.4%) and 162 were men (52.6%). The mean age (±SD) of the patients at the diagnosis was
9.6 ± 3.95 (range 0.5–18). The mean age (±SD) at onset of the symptom was 6.2 ± 3.95 (range 1–18). Symptoms were seen earlier
onset in definitive group than the suspicious group in our cohort (4.7 ± 3.9 years, 6.6 ± 3.9 years, respectively; P = 0.001). Clinical features were abdominal pain (83.1%), fever (55%), arthritis (17.1%), myalgia (4.5%), pleuritis (10%),
and erysipelas—like erythema (7.7%). Fever, arthralgia, arthritis, chest pain, and amyloidosis were found statistically significant
more in definitive group than suspicious group (P < 0.001, P < 0.001, P < 0.001, P < 0.05, and P < 0.001, respectively). MEFV gene mutations were identified in 199 patients (64.6%). The most commonly encountered MEFV mutation
among the patients was M694V homozygote (25%). M694V homozygous mutation was found most frequently in definitive FMF group
than other groups (49, 9, 8.9%, respectively). To our knowledge that FMF should be suspected in the case of non-specific but
recurrent attacks of serositis and high fever, and molecular analysis should be performed in order to make diagnosis of FMF. 相似文献
7.
【In Press】 Protective effect of pomegranate juice on retinal oxidative stress in streptozotocin-induced diabetic rats 下载免费PDF全文
AIM: To investigate the effect of pomegranate juice (PJ) intake on overall oxidation status in retinas of diabetic rats.
METHODS: Twenty-seven rats were divided into four groups as control (CO), diabetic (DM), control treated with PC (CO-PJ), and diabetic treated with PJ (DM-PJ).The retina tissues were used to determine 8-Hydroxy-2’-deoxyguanosine (8OHdG), malondialdehyde (MDA), reduced glutathione (GSH) levels, and the enzyme activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px).
RESULTS: The levels of 8OHdG and MDA were significantly increased in the retina of DM group compared to CO group (p=0.001, p<0.001 respectively). Both 8OHdG and MDA levels were decreased in PJ-DM group compared to DM group (p=0.004, p<0.001 respectively). The activities of antioxidant enzymes GSH, SOD, and GDH-Px were significantly decreased in the retina of DM group compared to CO group (p≤0.01). GSH and GSH-Px activities were higher in PJ-DM group compared with DM group (p=0.010, p=0.042, respectively) but SOD activity was not statistically different (p=0.938).
CONCLUSION: PJ intake was found to be effective in decreasing oxidative end products, and in increasing the activities of antioxidant enzymes in diabetic retinas of rats, which suggests it may be effective against oxidative stress in diabetic retinas. 相似文献
8.
9.
10.
Tuğba Kemaloğlu Öz M.D. Fatma Özpamuk Karadeniz M.D. Hareesh Gundlapalli M.D. Betul Erer M.D. Rohit K. Sharma M.D. Mustafa Ahmed M.D. Navin C. Nanda M.D. Aydın Yıldırım M.D. Gökçen Orhan M.D. Ayhan Öz M.D. Mehmet Eren M.D. 《Echocardiography (Mount Kisco, N.Y.)》2014,31(2):218-221
Coexistence of bicuspid aortic and pulmonary valves in the same patient is a very rare entity identified mainly during surgery and postmortem. To the best of our knowledge, only one case has been diagnosed by two‐dimensional echocardiography in a newborn with malposition of the great arteries but no images were presented. Here, we are reporting the first case of bicuspid pulmonary and aortic valves diagnosed by live/real time three‐dimensional transesophageal echocardiography in an adult with normally related great arteries. 相似文献