首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   845篇
  免费   66篇
  国内免费   5篇
耳鼻咽喉   26篇
儿科学   34篇
妇产科学   19篇
基础医学   161篇
口腔科学   1篇
临床医学   69篇
内科学   126篇
皮肤病学   30篇
神经病学   85篇
特种医学   28篇
外科学   157篇
综合类   8篇
预防医学   56篇
眼科学   7篇
药学   63篇
中国医学   5篇
肿瘤学   41篇
  2023年   9篇
  2022年   17篇
  2021年   32篇
  2020年   23篇
  2019年   30篇
  2018年   30篇
  2017年   9篇
  2016年   22篇
  2015年   17篇
  2014年   35篇
  2013年   39篇
  2012年   48篇
  2011年   36篇
  2010年   27篇
  2009年   30篇
  2008年   40篇
  2007年   29篇
  2006年   35篇
  2005年   49篇
  2004年   43篇
  2003年   27篇
  2002年   31篇
  2001年   17篇
  2000年   26篇
  1999年   16篇
  1998年   8篇
  1996年   3篇
  1995年   3篇
  1994年   5篇
  1993年   3篇
  1992年   15篇
  1991年   9篇
  1990年   19篇
  1989年   10篇
  1988年   15篇
  1987年   9篇
  1986年   11篇
  1985年   15篇
  1984年   6篇
  1983年   6篇
  1982年   8篇
  1981年   9篇
  1980年   4篇
  1979年   9篇
  1975年   2篇
  1974年   7篇
  1973年   4篇
  1972年   4篇
  1971年   3篇
  1970年   2篇
排序方式: 共有916条查询结果,搜索用时 15 毫秒
41.
Journal of Neurology - To assess the long-term outcomes of patients with temporal lobe epilepsy and CSF anti-glutamate decarboxylase antibodies (GAD65-Abs). We retrospectively analyzed the clinical...  相似文献   
42.
43.
44.
Journal of Neurology - The link between paraneoplastic neurological syndromes (PNS) and renal cell and bladder cancer (RCC/BC) is rare and uncertain. Our aim was to clinically evaluate, in light of...  相似文献   
45.

Background

Preoperative endoscopic pancreatic sphincterotomy (EPS) has been proposed to prevent postoperative pancreatic fistula (POPF) after distal pancreatectomy (DP) or enucleation (EN). The use of EPS as a curative treatment for POPF has been scarcely reported. We reported 10 consecutive patients who were successfully treated by EPS for a prolonged POPF.

Study design

Ten patients underwent EPS for prolonged POPF (median duration = 40 days, range 20-114; median daily output = 80 mL, range 50-250) after 6 DPs, 2 ENs, and 2 medial pancreatectomies.

Results

EPS was performed in all patients, with stent insertion in 4. No patient developed a specific complication because of EPS. POPF healed within a median delay of 4 days (range 1-12). One patient underwent a repeated endoscopy to treat stent malposition. The median delay of discharge after EPS was 13 days (range 8-15). With a 20-month median follow up, 1 patient developed early transient POPF recurrence because of spontaneous stent migration.

Conclusions

EPS is indicated for prolonged POPF after DP or EN because it is highly feasible, shortens healing, and is well tolerated.  相似文献   
46.
47.
This work considers the fabrication of ceramic parts with the help of an additive manufacturing process, robocasting, in which a paste with suspended particles is robotically extruded. Within the final part, the material properties depend on the orientation of the particles. A prediction of the particle orientation is challenging as the part usually undergoes multiple processing steps with varying contributions to the orientation. As the main contribution to the final particle orientation arises from the extrusion process, many corresponding prediction models have been suggested. Robocasting involves, however, further processing steps that are less studied as they have a smaller influence on the orientation. One of the processing steps is drying by natural convection, which follows directly after the extrusion process. A quantification of the reorientation that occurs during drying is mostly unknown and usually neglected in the models. Therefore, we studied the amount of reorientation of suspended particles in robocasted green filaments during drying in detail. For our study, we applied the discrete element method, as it meets various requirements: The exact particle geometry can be resolved precisely; particle–particle interactions can be described; the paste composition is reproduced exactly; the initial particle orientation can be set in accordance with the prediction from the analytical models for the extrusion part; macroscopic force laws exist to represent capillary forces due to the remaining fluid phase that remains during drying. From our study, we concluded that the magnitude of particle reorientation during drying is small compared to the orientation occurring during the extrusion process itself. Consequently, reorientation during drying might further be neglected within analytical orientation prediction models.  相似文献   
48.
49.
Epstein–Barr virus reactivation (EBV‐R) frequently occurs in patients having allogeneic hematopoietic stem cell transplantation (HSCT). We evaluated the impact of controlled EBV‐R on survival of 190 patients (114M/76F, median age: 51 yr, range 18–69), having HSCT for hematological malignancies (105 acute leukemias and myelodysplasias, 71 lymphoproliferative disorders, 14 others). Overall survival (OS) and progression‐free survival (PFS) were compared between patients with and without EBV‐R. Of 138, patients had reduced‐intensity conditioning regimen. Various stem cell sources (141 PB, 33 umbilical cord blood and 16 bone marrow) were used. Patients with EBV‐R had longer PFS and OS than those without EBV‐R: PFS at 2 yr 69% vs. 51% and at 5 yr 47% vs. 38% (< 0.04); OS at 2 yr 76% vs. 64% and at 5 yr 63% vs. 47%) (< 0.001). The use of rituximab had no impact on OS and PFS, but it reduced the intensity of GVHD, despite the fact that TRM was not significantly different between the two groups of patients. So, rituximab may have an additional effect to other factors on PFS and OS. In multivariate analysis, antithymocyte globulin administration was not a significant factor for PFS (= 0.68) and for OS (= 0.81). Circulating NK cells were significantly increased by 22% (= 0.03) in EBV‐R patients with no differences for other parameters. Controlled EBV‐R in the setting of HSCT is associated with better OS and PFS, with a significant increase in circulating NK cells.  相似文献   
50.
The observations of two gypsy cousins born to consanguineous parents and exhibiting classical leucinemia are reminders that severe, life-threatening ketotic decompensations may occur at any time. Emergency exchange-transfusions in these two children aged 3 and 5 years reversed the course of extremely severe attacks. Medium term evaluations showed very satisfactory neuropsychologic development in both children. Pathogenesis and prevention of such episodes are discussed.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号