全文获取类型
收费全文 | 1643373篇 |
免费 | 111047篇 |
国内免费 | 2558篇 |
专业分类
耳鼻咽喉 | 22714篇 |
儿科学 | 53343篇 |
妇产科学 | 43183篇 |
基础医学 | 242943篇 |
口腔科学 | 46113篇 |
临床医学 | 147955篇 |
内科学 | 309172篇 |
皮肤病学 | 37451篇 |
神经病学 | 121658篇 |
特种医学 | 63287篇 |
外国民族医学 | 276篇 |
外科学 | 246604篇 |
综合类 | 33889篇 |
现状与发展 | 3篇 |
一般理论 | 405篇 |
预防医学 | 117956篇 |
眼科学 | 38360篇 |
药学 | 129315篇 |
10篇 | |
中国医学 | 4711篇 |
肿瘤学 | 97630篇 |
出版年
2019年 | 12242篇 |
2018年 | 17637篇 |
2017年 | 13787篇 |
2016年 | 15514篇 |
2015年 | 17293篇 |
2014年 | 23616篇 |
2013年 | 34954篇 |
2012年 | 47332篇 |
2011年 | 49961篇 |
2010年 | 29376篇 |
2009年 | 27647篇 |
2008年 | 46244篇 |
2007年 | 49609篇 |
2006年 | 50475篇 |
2005年 | 47642篇 |
2004年 | 45989篇 |
2003年 | 44073篇 |
2002年 | 42642篇 |
2001年 | 86438篇 |
2000年 | 88327篇 |
1999年 | 73431篇 |
1998年 | 18772篇 |
1997年 | 16323篇 |
1996年 | 16519篇 |
1995年 | 15628篇 |
1994年 | 14185篇 |
1993年 | 13362篇 |
1992年 | 55336篇 |
1991年 | 54057篇 |
1990年 | 52991篇 |
1989年 | 51414篇 |
1988年 | 46524篇 |
1987年 | 45274篇 |
1986年 | 42863篇 |
1985年 | 40216篇 |
1984年 | 29378篇 |
1983年 | 24849篇 |
1982年 | 13765篇 |
1979年 | 26569篇 |
1978年 | 18248篇 |
1977年 | 15955篇 |
1976年 | 14406篇 |
1975年 | 16287篇 |
1974年 | 18971篇 |
1973年 | 18294篇 |
1972年 | 17386篇 |
1971年 | 16273篇 |
1970年 | 15235篇 |
1969年 | 14446篇 |
1968年 | 12971篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
C. Cornella L. Praticò R. Conca R. Fenoglio E. Lazzarich N. Surico D.M. Paternoster 《Transplantation proceedings》2009,41(9):3964-3966
Renal transplantation has provided women of childbearing age with increased fertility and the possibility of successful pregnancy outcomes. Approximately 14,000 births among women with transplanted organs have been reported worldwide, but pregnancy complications have been frequent: spontaneous or therapeutic abortion, preterm birth, low birth weight, and intrauterine growth restriction. Herein we have described a case of an acute rejection episode in a renal transplant recipient, occurring 6 months after successful delivery, despite the fulfillment of all European best practice guidelines criteria and the maintenance of adequate immunosuppression. Our case demonstrated that even a presumably low-risk patient can face worsening of renal function during or after pregnancy. Acute immune activation is uncommon but may occur in late-onset fashion. Despite adequate levels of maintenance immunosuppression, there is a risk of developing antibodies against the partner or the donor, causing acute renal immune damage. 相似文献
992.
Ramshekhar N. Menon Nirav Sanghani Mahendra Javali Neeraj Jain Arun B. Shah 《Annals of Indian Academy of Neurology》2009,12(1):40-44
We report an unusual case of sporadic adult onset cerebellar ataxia with hypogonadism. A 40-year-old unmarried man presented with progressive ataxia and dysarthria along with complaints of non-development of secondary sexual characteristics and erectile dysfunction. There were complaints of intermittent diarrhea. Clinical examination revealed a pan-cerebellar syndrome with features of hypoandrogenism. No eye movement abnormalities were evident. There were signs of malabsorption. Investigations confirmed the presence of auto-antibodies found in celiac disease, and a duodenal biopsy confirmed the same. Hypoandrogenism was postulated to be due to hypergonadotropic hypogonadism which has been mentioned in a few patients of celiac disease. However, the pattern seen in our patient was of a hypogonadotropic hypogonadism. This is probably secondary to an autoimmune hypophysitis seen in some patients in the absence of other clinical manifestations. Autoantibody testing should be a diagnostic necessity in any adult with a sporadic cerebellar ataxia. 相似文献
993.
D.E. Hilling J.K.R.A. Rijkelijkhuizen H.A.M. Töns O.T. Terpstra E. Bouwman 《Transplantation proceedings》2009,41(1):316
When studying histological characteristics of human and porcine pancreata in relation to islet isolation, we encountered a remarkably high number of hyperemic islets. The abnormalities observed in these islets ranged from a single dilated vessel through multiple widely dilated vessels to hemorrhages extending into the surrounding exocrine tissue. We determined their possible relevance for outcomes of islet isolation. This study involved a histological examination of 143 porcine pancreata (72 juvenile and 71 adult) and islet isolation from 48 adult pancreata. Human pancreata obtained from 71 multiple organ donors yielded islet isolation in 24 cases. To determine their endocrine content, tissue samples were stained with Aldehyde Fuchsin. The presence of hyperemic islets was scored semiquantitatively with pancreata allotted to categories based on the severity. In humans and pigs we observed hyperemic islets in 48% of pancreata, but only 4.0 ± 2.4% of the islets were hyperemic. In both humans and pigs, significantly higher endocrine content was found in the most severely affected pancreata. When the higher endocrine content was taken into account and isolation results were expressed as ratios of yield and content, we observed significantly lower yields in the most affected pancreata in pigs with a trend toward lower yields in humans. A substantial proportion of human and porcine pancreata contain hyperemic islets. Although the results in humans are preliminary, our data suggest that this phenomenon may contribute to the unpredictable, highly variable islet yields in pigs and humans. 相似文献
994.
995.
996.
997.
998.
999.
1000.