全文获取类型
收费全文 | 1038篇 |
免费 | 71篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 16篇 |
儿科学 | 100篇 |
妇产科学 | 50篇 |
基础医学 | 79篇 |
口腔科学 | 36篇 |
临床医学 | 93篇 |
内科学 | 282篇 |
皮肤病学 | 59篇 |
神经病学 | 71篇 |
特种医学 | 14篇 |
外科学 | 121篇 |
综合类 | 14篇 |
预防医学 | 25篇 |
眼科学 | 68篇 |
药学 | 57篇 |
肿瘤学 | 29篇 |
出版年
2024年 | 1篇 |
2023年 | 15篇 |
2022年 | 23篇 |
2021年 | 46篇 |
2020年 | 37篇 |
2019年 | 42篇 |
2018年 | 47篇 |
2017年 | 37篇 |
2016年 | 57篇 |
2015年 | 52篇 |
2014年 | 58篇 |
2013年 | 76篇 |
2012年 | 85篇 |
2011年 | 89篇 |
2010年 | 47篇 |
2009年 | 32篇 |
2008年 | 73篇 |
2007年 | 69篇 |
2006年 | 66篇 |
2005年 | 65篇 |
2004年 | 43篇 |
2003年 | 22篇 |
2002年 | 17篇 |
2001年 | 8篇 |
2000年 | 5篇 |
1999年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有1114条查询结果,搜索用时 15 毫秒
31.
International Ophthalmology - To analyze the relationship between the seasonal allergic conjunctivitis (SAC), eotaxin-2, matrix metalloproteinase-9 (MMP-9), and the topographical findings in the... 相似文献
32.
33.
Ahmet Sahan Cem Akbal Hasan Huseyin Tavukcu Ozge Cevik Sule Cetinel Cagrı Akın Sekerci Tarik Emre Sener Goksel Sener Yiloren Tanidir 《Andrologia》2020,52(9):e13639
A review of the literature indicated that sirtuin-1 expression, a regulator of nitric oxide bioavailability in erectile dysfunction (ED) after melatonin therapy, has not yet been investigated. The objective of this study was to evaluate the protective effects of melatonin for erectile function with sirtuin-1 protein expression in type 1 diabetic rat models. Fifty male Sprague Dawley rats were placed into five groups. Except for those in the control group (C), each animal received a single dose (60 mg/kg) of streptozotocin to induce diabetes. The animals were placed into the diabetes (D) group, insulin (I) group (6 U/kg/day), melatonin (Mel) group (10 mg kg−1 day−1) and combined treatment (I + Mel) group. Ten weeks later, the serum testosterone levels, intracavernosal pressure (ICP), mean arterial pressure (MAP), malondialdehyde (MDA), cyclic guanosine monophosphate (c-GMP), 8-hydroxydeoxyguanosine (8-OHdG), nitric oxide synthase (NOS), caspase-3 activity, sirtuin-1 and endothelial nitric oxide synthase (eNOS) protein expression and histological findings were assessed. The mean ICP/MAP ratio for the D group was lower than the mean ratios for the other groups. The treatment groups, particularly the I + Mel group, exhibited lower 8-OHdG and MDA levels and caspase-3 activity than the D group. The sirtuin-1 and eNOS expression and cavernosal tissue (CT) histology seemed to have been preserved by the melatonin and/or insulin therapy. These results were indicative of a profound protective effect of melatonin by the activation of sirtuin-1 protein expression against hyperglycemia-induced oxidative CT injury. 相似文献
34.
Huseyin Aksoy Sezin Ozyurt Ulku Aksoy Gokhan Acmaz Ozge Idem Karadag Mert Ali Karadag 《International journal of surgery case reports》2014,5(12):1074-1076
INTRODUCTION
Ovarian torsion (OT) is a rare cause of acute abdominal pain that requires prompt recognition and treatment during puerperium. Diagnosis of OT can be challenging due to nonspecific clinical features and uncommon objective findings. The management of OT is often delayed because of diagnostic uncertainty. Early and timely recognition and prompt intervention are crucial to preserve ovarian function and to minimize morbidity.PRESENTATION OF CASE
We report a 29-year-old postpartum woman who presented to the emergency department (ED) with severe right flank pain, nausea and anorexia initially considered as renal colic. After further investigation, OT caused by large mucinous cyst was diagnosed. Right-sided salpingo-oophorectomy was performed due to hemorrhagic ovary and huge cystic mass causing ischemic OT.DISCUSSION
OT is often diagnosed based on the clinical presentation, including severe, sharp, sudden onset of unilateral lower abdominal pain and tenderness with a palpable laterouterine pelvic mass and nausea/vomiting. Emergency surgical intervention should be performed if OT is suspected to confirm the diagnosis and uncoil the twist to prevent ovarian damage.CONCLUSION
In conclusion, emergency physicians should be aware of the possibility of OT in postpartum women. Therefore, early and timely surgical intervention should be undertaken. 相似文献35.
Zeki Aydin Meltem Gursu Serhat Karadag Sami Uzun Abdullah Sumnu Yasemin Doventas 《Renal failure》2014,36(8):1253-1257
Introduction: Hepcidin, a small peptide hormone synthesized in the liver, plays central role in regulation of iron metabolism. Hepcidin generation in chronic kidney disease (CKD) is dependent on iron status, anemia, inflammation, and hypoxia and erythropoietin levels. In our study, the relationship between Prohepcidin levels and inflammation and iron indices in non-diabetic uremic patients was investigated. Methods: This study has a cross-sectional design which includes four groups: Non-diabetic 21 patients with stage 4 CKD (predialysis), 20 hemodialysis (HD) and 21 peritoneal dialysis (PD) patients and 17 healthy volunteers as the control group. Complete blood count, iron, total iron binding capacity (TIBC), ferritin, high-sensitive C-reactive protein (hsCRP), fibrinogen, parathyroid hormone, interleukin (IL)-6 and Prohepcidin levels were recorded. Results: Serum Prohepcidin levels in the predialysis, HD, PD and the control groups were 119.6?±?45.1?ng/mL, 140.2?±?41.8?ng/mL, 148.2?±?35.0?ng/mL and 93.8?±?21.9?ng/mL, respectively (p?0.001). Prohepcidin was positively correlated with urea (r?=?0.345, p?=?0.002), creatinine (r?=?0.465, p?0.001), phosphorus (r?=?0.253, p?=?0.025), hsCRP (r?=?0.275, p?=?0.019), duration of dialysis treatment (r?=?0.443, p?0.001), fibrinogen (r?=?0.467, p?0.001) and IL-6 (r?=?0.615, p?0.001) levels. A negative correlation was detected between Prohepcidin levels and albumin (r?=??0.286, p?0.001), TIBC (r?=??0.573, p?0.001), GFR (r?=??0.473, p?0.001), hemoglobin (r?=??0.351, p?=?0.002) and hematocrit (r?=??0.342, p?=?0.002) levels. Discussion: Prohepcidin levels increase with deepening anemia and show positive correlation with inflammatory markers. Therapeutic interventions regarding Prohepcidin action on inflammatory status may play a role in the treatment of anemia due to inflammation. Functional iron deficiency is frequent in uremic patients. It may be beneficial to measure Prohepcidin level together with ferritin among these patients. 相似文献
36.
Beyza Ozcan Dilek Ulubas Isik Ozge Aydemir Yusuf Kale Nazile Erturk Ahmet Yagmur Bas Nihal Demirel 《European journal of pediatrics》2014,173(2):257-258
Congenital megalourethra is a rare urogenital malformation characterized by severe dilatation and elongation of the penile urethra. It causes functional obstruction of the lower urinary system. Herein, we present a newborn with congenital megalourethra with single umbilical artery. 相似文献
37.
Erkan Alpsoy Mualla Polat Ibrahim Halil Yavuz Pelin Kartal Didem Didar Balci Ayse Serap Karadag Asli Bilgic Ercan Arca Bilge Fettahlioglu Karaman Selma Emre Esra Adisen Neslihan Sendur Ozlem Bilgic Ayca Cordan Yazici Basak Yalcin Rafet Koca Kamer Gunduz Murat Borlu Tulin Ergun Pinar Dursun Serap Gunes Bilgili Asli Surer Adanir Ayla Gulekon Gizem Yagcioglu Ertan Yilmaz Ufuk Kavuzlu Yesim Senol 《ANNALS OF DERMATOLOGY》2020,32(3):181
BackgroundInternalized stigma, adoption of negative attitudes and stereotypes of the society regarding persons'' illness, has not been studied previously in pediatric psoriasis patients.ObjectiveWe aimed to investigate the internalized stigma in pediatric psoriasis patients and to determine differences according to factors affecting internalized stigma compared to adult psoriasis patients.MethodsThis multicenter, cross-sectional, comparative study included 125 pediatric (55 female, 70 male; mean age±standard deviation [SD], 14.59±2.87 years) and 1,235 adult psoriasis patients (577 female, 658 male; mean age±SD, 43.3±13.7 years). Psoriasis Internalized Stigma Scale (PISS), Dermatology Life Quality Index (DLQI), Perceived Health Status (PHS), and the General Health Questionnaire (GHQ)-12 were the scales used in the study.ResultsThe mean PISS was 58.48±14.9 in pediatric group. When PISS subscales of groups were compared, the pediatric group had significantly higher stigma resistance (p=0.01) whereas adult group had higher scores of alienation (p=0.01) and stereotype endorsement (p=0.04). There was a strong correlation between mean values of PISS and DLQI (r=0.423, p=0.001). High internalized stigma scores had no relation to either the severity or localization of disease in pediatric group. However, poor PHS (p=0.007) and low-income levels (p=0.03) in both groups, and body mass index (r=0.181, p=0.04) in the pediatric group were related to high PISS scores.ConclusionInternalized stigma in pediatric patients is as high as adults and is related to poor quality of life, general health, and psychological illnesses. Unlike adults, internalized stigma was mainly determined by psoriasis per se, rather than disease severity or involvement of visible body parts, genitalia or folds. 相似文献
38.
Remzi Arslan Muhammed E. Aydin Mehmet K. Karadag Ozgur Caglar Erdem Karadeniz Mehmet D. Aydin 《Neuropathology》2020,40(5):467-473
Fatal pulmonary edema and hemorrhage are significant complications of endovascular treatment in steno-occlusive carotid artery disease; a rational mechanism has not been adequately examined in the literature so far. We investigated if cervical sympathetic ganglia ischemia prevents pulmonary vasospasm on the prognosis of bilateral common carotid artery ligation (BCCAL). Twenty-three adult New Zealand rabbits (4.2 ± 0.3 kg) were randomly divided into three groups: the control group (G1, n = 5), the sham group (G2, n = 6), and the BCCAL group (G3, n = 12). Common carotid arteries were dissected bilaterally in G2/G3, and permanent BCCAL was applied to only in G3. All animals were followed for 3 weeks and decapitated under general anesthesia. Histopathological changes in stellate ganglia and severity of pulmonary vasospasm-related lung edema and hemorrhage were investigated. Results were analyzed by the Kruskal–Wallis test. Two animals of G3 dead within three weeks and the remainder were sacrificed three weeks later. Subpleural petechial foci and an endotracheal bloody fluid collection were grossly observed in the lungs. Histopathologically, pulmonary artery vasospasm, perivascular and subintimal edema, interalveolar hemorrhage, and alveolar wall destructions were observed with less ischemic-degenerated neuron density-determined stellate ganglia animals. Neurodegeneration of stellate ganglia may have a beneficial effect on the prevention of lung injury during steno-occlusive carotid artery disease. 相似文献
39.
Elif Bulut Abdulsamet Erden Omer Karadag Kader Karli Oguz Seza Ozen 《Journal of neuroradiology. Journal de neuroradiologie》2019,46(3):193-198
Purpose
To increase the knowledge of central nervous system (CNS) imaging features in deficiency of adenosine deaminase 2 (DADA2) by examining magnetic resonance imaging (MRI) studies of a relatively large number of patients.Methods
We retrospectively examined neuroimages of 12 patients (7 male, 5 female) diagnosed with DADA2. The mean age of the patients at the time of initial brain MRI was 16.7 ± 10.2 years. Seven patients (58.3%) fulfilled the classification criteria of polyarteritis nodosa. Brain MRI studies were assessed with respect to findings of ischemia, intracranial hemorrhages, focal parenchymal signal abnormalities, cerebral/cerebellar volume loss, and abnormal contrast enhancement. Angiographic studies of 7 patients were evaluated for the signs of vasculitis.Results
The most frequent finding was acute and/or chronic lacunar ischemic lesions in the brainstem and/or deep gray matter (n = 9, 75%). Six patients (50%) revealed MRI findings compatible with recurrent ischemic attacks. Small nodular contrast enhancement (n = 2, 16.6%), acute putaminal hemorrhage (n = 1, 8.3%) and findings compatible with posterior reversible encephalopathy syndrome (n = 1, 8.3%) were also detected. Slight-to-moderate diffuse cerebral and/or cerebellar volume loss (n = 7, 58.3%), decreased T1 signal of the bone marrow (n = 6, 50%) and optic atrophy (n = 1, 8.3%) were the other findings on brain MRI. The only abnormal angiographic finding was reduced caliber of the right distal posterior cerebral artery in MRA of a patient (14.6%).Conclusion
DADA2 should be included in the differential diagnosis of young patients presenting with ischemic and/or hemorrhagic lesions located in the brainstem and deep gray matter, especially if they have a family history or additional systemic abnormalities. 相似文献40.
Kirimlioglu V Kirimlioglu H Yilmaz S Ozgor D Coban S Karadag N Yologlu S 《Transplantation proceedings》2006,38(2):564-567
The high capacity of liver regeneration after partial hepatectomy (PH) is well known. This study investigated the role of the antioxidant defense system in regeneration among Wistar-albino male rats subjected to 70% partial hepatectomy after a pretreatment period of 2 weeks with eicosapentanoic acid (EPA) rich fish oil (FO), first pressed virgin olive oil (OO), or vitamin E. The control group of 10 rats underwent PH only. On postoperative day 3, all rats were humanely killed. Liver sections of animals treated with FO or vitamin E showed significant increases in regeneration within both liver parenchyma and cut surface compared with the control group (P < .05). Liver sections of OO displayed an insignificant increase in liver regeneration (P > .05), with less increase in parenchyma than of the cut surface. The enhancement of the liver parenchymal regeneration in the FO group was significantly greater than that of the vitamin E group. Concerning liver function tests (LFT), there was no significant difference among the groups. When the treatment groups were compared to the control group glutathione (GSH) levels were increased and content of malondialdehyde (MDA), nitric oxide (NO), and superoxide dismutase (SOD) were decreased. Based on these results, we concluded that after 70% PH in rats, the liver parenchyma and cut surface regeneration were greatest with FO and least with OO treatment. Both FO and vitamin E served to improve the antioxidant defense system more than OO treatment. 相似文献