全文获取类型
收费全文 | 830篇 |
免费 | 35篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 17篇 |
儿科学 | 56篇 |
妇产科学 | 42篇 |
基础医学 | 40篇 |
口腔科学 | 39篇 |
临床医学 | 65篇 |
内科学 | 189篇 |
皮肤病学 | 13篇 |
神经病学 | 53篇 |
特种医学 | 30篇 |
外科学 | 186篇 |
综合类 | 9篇 |
预防医学 | 25篇 |
眼科学 | 51篇 |
药学 | 26篇 |
中国医学 | 2篇 |
肿瘤学 | 23篇 |
出版年
2023年 | 8篇 |
2022年 | 7篇 |
2021年 | 26篇 |
2020年 | 13篇 |
2019年 | 19篇 |
2018年 | 49篇 |
2017年 | 44篇 |
2016年 | 60篇 |
2015年 | 29篇 |
2014年 | 28篇 |
2013年 | 65篇 |
2012年 | 53篇 |
2011年 | 69篇 |
2010年 | 47篇 |
2009年 | 52篇 |
2008年 | 56篇 |
2007年 | 71篇 |
2006年 | 22篇 |
2005年 | 23篇 |
2004年 | 19篇 |
2003年 | 27篇 |
2002年 | 17篇 |
2001年 | 9篇 |
2000年 | 8篇 |
1999年 | 7篇 |
1998年 | 12篇 |
1997年 | 5篇 |
1996年 | 6篇 |
1995年 | 5篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1989年 | 1篇 |
1988年 | 4篇 |
1987年 | 1篇 |
1960年 | 1篇 |
排序方式: 共有866条查询结果,搜索用时 15 毫秒
1.
2.
Dr. Rüçhan Ergün Ali I. Ökten Muammer Yüksel Bülent Gül Çetin Evliyaoglu Fikret Ergüngör Yamaç Taşkin 《Neurosurgical review》1997,20(1):33-37
Hydatid cysts of central nervous system are rare and comprise only 2% to 3% of all hydatid cysts reported. Orbital localization is very uncommon and has been reported less than 1 % of all hydatid diseases. The primary treatment of hydatid disease is surgical. The most important complication of the surgical treatment is secondary hydatidosis due to spillage of the cyst contents. Because of the difficulties of the orbital localization, total extirpation of the cysts without rupture is almost impossible. Preventing spontaneous rupture of the cysts during surgery and postoperative antihelmintic treatment should be taken into consideration in these cases.This study includes four cases who underwent surgery for orbital hydatid cysts. Radiological characteristics, operative technique and postoperative medical therapy are discussed. 相似文献
3.
4.
Either oral, intravenous or subcutaneous 1.25 (OH)2 cholecalciferol is used in the therapy of hyperparathyroidism, which is a serious complication in patients on haemodialysis.
We studied a total of 30 patients (10 women and 20 men) and divided them into two groups depending on the different types
of dialysis membranes used. In the poly sulfone group, mean age was 43.7±0.97 years and the average dialysis period lasted
29.9±1.23 months. For the 15 cases in which we used cuprophane membrane the mean age was 40.2±1.31 years and the average dialysis
period lasted 16.2±0.86 months. The calcium level of the dialysate in both groups was 1.5 mmol/l.
According to the study protocol, the determined oral calcitriol dose was 0.07 mg/kg and it was administered intermittently.
After one month on high dose calcitriol therapy, treatment was continued with a maintenance dose of 0.03 mg/kg for a further
six months. As a phosphate binding agent, daily 3 g calcium carbonate was administered.
Before starting this treatment protocol, patients went on a 1 mg/day calcitriol therapy, although the mean PTH level was 424.63
pg/ml and the mean serum alkaline phosphatase level was 290.2 U/l. During the pretreatment period, levels of PTH, alkaline
phosphatase, ionized calcium, and total calcium remained significantly within normal limits as a result of the new therapy
protocol applied.
PTH and phosphorus clearance rates were compared in the patient groups in which different dialysis membranes had been used.
PTH and phosphorus clearances were 15.2±3 ml/min and 239.1±19.2 ml/min, respectively, in the polysulfone membrane group, and
1.1±0.3 ml/min and 112.8±9.88 ml/min, respectively, in the cuprophane membrane group (p<0.05). 相似文献
5.
6.
H. Böhles O. J. Beifuss U. Brandl J. Pichl Z. Akçetin L. Demling 《Journal of molecular medicine (Berlin, Germany)》1988,66(3):87-91
Summary An increased frequency of kidney stone formation is reported in patients with inflammatory bowel disease. In order to investigate its pathogenesis, the concentrations of factors known to enhance calcium oxalate stone formation (oxalate, calcium, uric acid) as well as of inhibitory factors for nephrolithiasis (magnesium, citrate) were determined in the urine of 86 patients with Crohn's disease and compared with those of 53 metabolically healthy controls. Six patients with Crohn's disease already had experienced calcium oxalate nephrolithiasis. Patients with Crohn's disease had significantly higher urinary oxalate and lower magnesium and citrate concentrations. Among all patients magnesium and citrate were significantly lower in those with a positive history of kidney stones. Our results demonstrate that the increased propensity for renal stone formation in patients with Crohn's disease is a result not only of increased urinary oxalate, but also of decreased urinary magnesium and citrate concentrations.Abbreviations CDAI
Crohn's disease activity index
Dedicated to Professor Dr. N. Zöllner on the occasion of his 65th birthday 相似文献
7.
Ahmet Tektemur Ebru Etem Önalan Nalan Kaya Tektemur Serap Dayan Cinkara Ayten Kılınçlı Çetin İbrahim Tekedereli Tuncay Kuloğlu Gaffari Türk 《Andrologia》2021,53(2):e13954
Male infertility is a global health problem, and the underlying molecular mechanisms are not clearly known. Ion channels and microRNAs (miRNAs), known to function in many vital functions in cells, have been shown to play a significant role in male infertility through changes in their expressions. The study aimed to evaluate the alterations of testicular and/or spermatozoal potassium voltage-gated channel subfamily J member 11 (KCNJ11), Cystic fibrosis transmembrane conductance regulator (CFTR), miR-let-7a and miR-27a expressions in carbamazepine-related male infertility. Here, we showed that carbamazepine reduced sperm motility, increased abnormal sperm morphology, and impaired hormonal balance as well as increased relative testis weight and decreased relative seminal vesicle weight. On the other hand, downregulated KCNJ11 and upregulated miR-let-7a expressions were determined in testis (p < .05). Also, downregulated KCNJ11 and upregulated CFTR and miR-27a expressions were found in spermatozoa (p < .05). Interestingly, altered testicular KCNJ11 and miR-let-7a expressions were correlated with decreased sperm motility and elevated sperm tail defect. Besides, spermatozoal CFTR and miR-27a expressions positively correlated with sperm tail defects. The results indicated a significant relationship between ion channel and/or miRNA expression alterations and impaired sperm parameters due to carbamazepine usage. 相似文献
8.
9.
Localized colitis cystica profunda is a rare, benign disease of the lower gastro-intestinal tract, usually presenting as a rectal mass and characterized microscopically by the presence of mucus-filled cysts in the submucosa. Knowledge of this particular pathological entity is important as it can mimic a well differentiated adenocarcinoma of the rectum and therefore could lead to unnecessary surgical resection. We present a case of colitis cystica profunda misdiagnosed as adenocarcinoma based on their similar clinical picture and histological features. 相似文献
10.
Reverberation and multiple shadow artifacts recorded from patients with intra‐pericardial centrifugal continuous‐flow left ventricular assist devices 下载免费PDF全文