全文获取类型
收费全文 | 2588001篇 |
免费 | 185105篇 |
国内免费 | 7573篇 |
专业分类
耳鼻咽喉 | 34280篇 |
儿科学 | 85251篇 |
妇产科学 | 71578篇 |
基础医学 | 363714篇 |
口腔科学 | 69667篇 |
临床医学 | 234576篇 |
内科学 | 515622篇 |
皮肤病学 | 62466篇 |
神经病学 | 213477篇 |
特种医学 | 99937篇 |
外国民族医学 | 736篇 |
外科学 | 386469篇 |
综合类 | 50393篇 |
现状与发展 | 5篇 |
一般理论 | 984篇 |
预防医学 | 196234篇 |
眼科学 | 56668篇 |
药学 | 188027篇 |
8篇 | |
中国医学 | 5333篇 |
肿瘤学 | 145254篇 |
出版年
2021年 | 19984篇 |
2019年 | 20627篇 |
2018年 | 29292篇 |
2017年 | 22599篇 |
2016年 | 26231篇 |
2015年 | 29513篇 |
2014年 | 40446篇 |
2013年 | 60442篇 |
2012年 | 80234篇 |
2011年 | 84502篇 |
2010年 | 51011篇 |
2009年 | 49161篇 |
2008年 | 79048篇 |
2007年 | 83852篇 |
2006年 | 85590篇 |
2005年 | 81754篇 |
2004年 | 78746篇 |
2003年 | 76071篇 |
2002年 | 73352篇 |
2001年 | 128428篇 |
2000年 | 131349篇 |
1999年 | 110527篇 |
1998年 | 31267篇 |
1997年 | 27928篇 |
1996年 | 28225篇 |
1995年 | 27394篇 |
1994年 | 25075篇 |
1993年 | 23422篇 |
1992年 | 85170篇 |
1991年 | 81574篇 |
1990年 | 78796篇 |
1989年 | 76075篇 |
1988年 | 69488篇 |
1987年 | 68013篇 |
1986年 | 63555篇 |
1985年 | 60518篇 |
1984年 | 44947篇 |
1983年 | 37949篇 |
1982年 | 22462篇 |
1981年 | 19995篇 |
1979年 | 38983篇 |
1978年 | 27456篇 |
1977年 | 23258篇 |
1976年 | 21501篇 |
1975年 | 22825篇 |
1974年 | 26803篇 |
1973年 | 25375篇 |
1972年 | 23763篇 |
1971年 | 21965篇 |
1970年 | 20192篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
After the interaction of estrogen with the ligand binding domain (LBD) of mouse estrogen receptor‐α (mERα) and hormone‐responsive elements of target genes, many nuclear proteins are recruited to regulate the expression of specific genes. Because it is not known which brain proteins interact with LBD or whether these proteins vary with age and sex, we used pull‐down assay and far Western blotting to detect five nuclear proteins of 160, 140, 87, 60, and 46 kD in the mouse brain. These interacting proteins were identified as PELP1, RIP140, PGC1α, BAF60, and ADA3, respectively. The level of PELP1, RIP140, PGC1α, and BAF60 decreased drastically in old compared with adult male mice, whereas the ADA3 level showed no significant change. PELP1, PGC1α, and BAF60 levels were lower in old male compared with female mice. Thus we report the identification and interaction of five nuclear proteins with mERα‐LBD, indicating their role in estrogen signaling and brain functions during aging. © 2009 Wiley‐Liss, Inc. 相似文献
992.
993.
994.
995.
K. Toutouzas E. Tsiamis M. Drakopoulou A. Synetos J. Karampelas M. Riga C. Tsioufis D. Tousoulis E. Stefanadi C. Vlassis C. Stefanadis 《Diabetes & metabolism》2009,35(4):299-304
AimsLocal coronary and systemic inflammation is pronounced in patients with diabetes mellitus (DM). Intracoronary thermography detects local inflammation and C-reactive protein (CRP) is a marker of systemic inflammation. We investigated whether or not, in patients with DM, thermal heterogeneity of culprit lesions (CLs) correlates with that of non-culprit lesions (NCLs) and with systemic inflammation.MethodsWe included DM patients who had two angiographically significant lesions and were undergoing percutaneous coronary intervention. We measured the temperature difference (ΔT) between the lesion and proximal vessel wall.ResultsWe included 104 (n = 208 lesions) patients: 32 (n = 64 lesions) had DM and 72 (n = 144 lesions) were non-DM (control group). ΔT was increased in DM in both CLs and NCLs (CLs: DM = 0.12 ± 0.06 °C; no DM = 0.06 ± 0.04 °C; P < 0.01 versus NCLs: DM = 0.13 ± 0.08 °C versus no DM = 0.06 ± 0.05 °C; P < 0.01). Patients with DM had similar ΔT in CLs and NCLs (P = 0.49). A linear correlation was detected between heat production in all lesions and CRP (R = 0.45; P < 0.01), which was attributed to the correlation of ΔT in lesions of patients with DM and CRP (R = 0.32; P < 0.01). In lesions of patients with low CRP, a greater rate of discrepancy was found, as 100% of lesions in patients with DM versus 66.1% of lesions of patients without DM had a high ΔT in one or both lesions (P < 0.01).ConclusionIn patients with DM, local inflammatory activation is diffuse and correlates with systemic inflammation. However, low systemic inflammatory activation does not always predict an increase in local thermal heterogeneity. 相似文献
996.
997.
998.
999.
1000.
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