全文获取类型
收费全文 | 2317篇 |
免费 | 91篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 46篇 |
儿科学 | 93篇 |
妇产科学 | 208篇 |
基础医学 | 188篇 |
口腔科学 | 94篇 |
临床医学 | 210篇 |
内科学 | 620篇 |
皮肤病学 | 22篇 |
神经病学 | 106篇 |
特种医学 | 69篇 |
外科学 | 438篇 |
综合类 | 48篇 |
预防医学 | 60篇 |
眼科学 | 65篇 |
药学 | 83篇 |
中国医学 | 6篇 |
肿瘤学 | 66篇 |
出版年
2023年 | 10篇 |
2022年 | 17篇 |
2021年 | 37篇 |
2020年 | 27篇 |
2019年 | 38篇 |
2018年 | 49篇 |
2017年 | 43篇 |
2016年 | 77篇 |
2015年 | 85篇 |
2014年 | 94篇 |
2013年 | 146篇 |
2012年 | 197篇 |
2011年 | 189篇 |
2010年 | 108篇 |
2009年 | 111篇 |
2008年 | 164篇 |
2007年 | 176篇 |
2006年 | 159篇 |
2005年 | 165篇 |
2004年 | 140篇 |
2003年 | 112篇 |
2002年 | 81篇 |
2001年 | 67篇 |
2000年 | 40篇 |
1999年 | 43篇 |
1998年 | 8篇 |
1997年 | 7篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 3篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 4篇 |
1988年 | 1篇 |
1986年 | 2篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1973年 | 1篇 |
1961年 | 1篇 |
排序方式: 共有2422条查询结果,搜索用时 281 毫秒
41.
42.
The aim of this study was to evaluate the total antioxidant status (TAS), total oxidative status (TOS) and oxidative stress
index (OSI) in patients with postmenopausal osteoporosis. We also investigate the relation between bone mineral density and
oxidative/antioxidative parameters. Thirty-nine patients with osteoporosis and 26 healthy controls were included in the study.
Plasma TAS, TOS levels were determined by using a novel automated methods. Plasma TOS and OSI value were significantly higher,
and plasma TAS level was lower in patients than in healthy controls (P < 0.001 for all). There was a significant negative correlation between OSI and BMD in lumbar and femoral neck region (r = −0.63, P < 0.001; r = 0.40, P = 0.018). The results of this study indicated that increased osteoclastic activity and decreased osteoblastic activity may
be associated with an imbalance between oxidant and antioxidant status in postmenopausal osteoporosis. Therefore, supplementation
of antioxidant-enriched diet to the therapy might shed light on the development of novel therapeutic strategies for osteoporosis. 相似文献
43.
Okan Bilge Servet Celik Huseyin Aktug 《Anatomical science international / Japanese Association of Anatomists》2013,88(2):97-100
A transverse muscular band extending from the left pleura to the esophagus was detected during routine dissection of posterior mediastinum in Anatomy Department of Ege University Medical Faculty. As a result of a detailed review of the literature, we found that this structure is named as the pleuro-esophageal muscle. This muscle was made of smooth fibers, acting as an anchoring structure to the lower part of the esophagus. While the entire esophageal muscle is smooth in the early stage of fetal development, this muscle probably derives as an early separation from the esophagus. 相似文献
44.
Sebnem Egriboyun Gamze Ugurluer Funda Vesile Corapcioglu Levent Celik Gorkem Gungor Banu Atalar Enis Ozyar 《Journal of Medical Imaging and Radiation Sciences》2021,52(2):305-311
Extracranial malignant rhabdoid tumors are rare and aggressive tumors that typically occur in the pediatric age group and have a poor prognosis. Herein, we report a case of a one year and five months old male infant who was referred with the diagnosis of malignant rhabdoid tumor of the liver. Magnetic resonance guided stereotactic body radiotherapy was administered with concomitant chemotherapy. Treatment was well tolerated with no severe acute side effects. A 40.8% volumetric reduction of the tumor was observed at the last fraction of MR guided radiotherapy. 相似文献
45.
Fevzi Altuntas Naim Ata Tugce Nur Yigenoglu Semih Bascı Mehmet Sinan Dal Serdal Korkmaz Sinem Namdaroglu Abdulkadir Basturk Tuba Hacıbekiroglu Mehmet Hilmi Dogu İlhami Berber Kursat Dal Kerem Kınık İbrahim Haznedaroglu Fatma Meriç Yılmaz İsa Kılıç Sinan Demircioğlu Alper Yosunkaya Osman Celik 《Transfusion and apheresis science》2021,60(1):102955
IntroductionPassive antibody therapy has been used to immunize vulnerable people against infectious agents. In this study, we aim to investigate the efficacy of convalescent plasma (CP) in the treatment of severe and critically ill patients diagnosed with COVID-19.MethodThe data of severe or critically ill COVID-19 patients who received anti-SARS-CoV-2 antibody-containing CP along with the antiviral treatment (n = 888) and an age-gender, comorbidity, and other COVID-19 treatments matched severe or critically ill COVID-19 patients at 1:1 ratio (n = 888) were analyzed retrospectively.ResultsDuration in the intensive care unit (ICU), the rate of mechanical ventilation (MV) support and vasopressor support were lower in CP group compared with the control group (p = 0.001, p = 0.02, p = 0.001, respectively). The case fatality rate (CFR) was 24.7 % in the CP group, and it was 27.7 % in the control group. Administration of CP 20 days after the COVID-19 diagnosis or COVID-19 related symptoms were associated with a higher rate of MV support compared with the first 3 interval groups (≤5 days, 6?10 days, 11?15 days) (p=0.001).ConclusionCP therapy seems to be effective for a better course of COVID-19 in severe and critically ill patients. 相似文献
46.
47.
Incorporation of rician noise in the analysis of biexponential transverse relaxation in cartilage using a multiple gradient echo sequence at 3 and 7 tesla
下载免费PDF全文
![点击此处可从《Magnetic resonance in medicine》网站下载免费的PDF全文](/ch/ext_images/free.gif)
48.
49.
50.