全文获取类型
收费全文 | 4158篇 |
免费 | 336篇 |
国内免费 | 29篇 |
专业分类
耳鼻咽喉 | 29篇 |
儿科学 | 140篇 |
妇产科学 | 176篇 |
基础医学 | 548篇 |
口腔科学 | 202篇 |
临床医学 | 447篇 |
内科学 | 810篇 |
皮肤病学 | 196篇 |
神经病学 | 307篇 |
特种医学 | 96篇 |
外科学 | 373篇 |
综合类 | 66篇 |
一般理论 | 7篇 |
预防医学 | 351篇 |
眼科学 | 81篇 |
药学 | 334篇 |
中国医学 | 47篇 |
肿瘤学 | 313篇 |
出版年
2024年 | 9篇 |
2023年 | 104篇 |
2022年 | 198篇 |
2021年 | 311篇 |
2020年 | 201篇 |
2019年 | 307篇 |
2018年 | 339篇 |
2017年 | 213篇 |
2016年 | 212篇 |
2015年 | 219篇 |
2014年 | 261篇 |
2013年 | 291篇 |
2012年 | 415篇 |
2011年 | 374篇 |
2010年 | 161篇 |
2009年 | 128篇 |
2008年 | 181篇 |
2007年 | 159篇 |
2006年 | 131篇 |
2005年 | 90篇 |
2004年 | 78篇 |
2003年 | 52篇 |
2002年 | 55篇 |
2001年 | 5篇 |
2000年 | 1篇 |
1999年 | 8篇 |
1998年 | 4篇 |
1997年 | 3篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 4篇 |
1992年 | 2篇 |
1989年 | 3篇 |
1965年 | 1篇 |
排序方式: 共有4523条查询结果,搜索用时 15 毫秒
71.
72.
Javid Safa Mohammad Reza Ardalan Mohammadamin Rezazadehsaatlou Mehran Mesgari Reza Mahdavi Maryam Poorkar Jadid 《International urology and nephrology》2014,46(8):1633-1638
Background
Chronic renal failure is a progressive and irreversible loss of kidney function, and the hemodialysis (HD) is one of the most common modalities in this regard. Oxidative stresses [like interleukin-8 (IL-8) and tumor necrosis factor-alpha (TNF-α)] and inflammation are the main risk factors associated with cardiovascular diseases and other complications in many organs in hemodialysis patients; meanwhile, antioxidants like alpha lipoic acid (ALA) may reduce the oxidative stress markers and the levels of inflammatory cytokines, so can improve of the patient’s quality of life.Methods
In this randomized clinical trial study, 60 HD patients were randomly categorized in two case and control groups. Case group received a daily capsule of 600 mg of ALA supplementation for 8 weeks, and the control group received placebo capsules daily. The serum level of IL-8 and TNF-α was measured in both groups before and after the intervention.Results
There were no significant differences in age, gender, duration of dialysis, and causative factor for dialysis between both groups (P > 0.05). The mean of IL-8 and TNF-α after the intervention in case group was 26.20 ± 15.34 and 21.25 ± 9.61, respectively; the difference between both groups was not statistically significant (P > 0.05).Conclusion
Based on the better feeling and other beneficial effects of ALA were found in our study; we can conclude that it is a beneficial and recommended supplement, especially, for diabetic and dialysis patients. 相似文献73.
74.
Ian H. de Boer Maryam Afkarian Tessa C. Rue Patricia A. Cleary John M. Lachin Mark E. Molitch Michael W. Steffes Wanjie Sun Bernard Zinman 《Journal of the American Society of Nephrology : JASN》2014,25(10):2342-2350
Macroalbuminuria, defined as urine albumin excretion rate (AER)≥300 mg/d, has long been considered a stage of irreversible kidney damage that leads reliably to GFR loss. We examined the long-term renal outcomes of persons with type 1 diabetes who developed incident macroalbuminuria during the Diabetes Control and Complications Trial (DCCT)/Epidemiology of Diabetes Interventions and Complications (EDIC) study. One hundred fifty-nine participants developed incident macroalbuminuria and were subsequently followed for a median duration of 9 years (maximum of 25 years). At the time of macroalbuminuria diagnosis, mean (SD) age was 37 (9) years, mean (SD) duration of diabetes was 17 (5) years, median AER was 524 mg/d, and mean (SD) eGFR was 108 (20) ml/min per 1.73 m2. Ten years after macroalbuminuria diagnosis, the cumulative incidence of a sustained reduction in AER to <300 mg/d was 52%, mostly but not entirely under treatment with renin-angiotensin system inhibitors. The cumulative incidence of impaired GFR (sustained eGFR<60 ml/min per 1.73 m2) 10 years after macroalbuminuria diagnosis was 32%, including 16% who developed ESRD. Lower hemoglobin A1c and BP and regression to AER<300 mg/d were associated with reduced risk of developing impaired GFR. In conclusion, people with type 1 diabetes who develop macroalbuminuria are at high risk of progressive kidney disease. However, through at least 10 years of follow-up, AER could often be controlled, and GFR frequently remained in the normal range.Macroalbuminuria, defined as urine albumin excretion rate (AER)≥300 mg/d, has long been considered a stage of irreversible kidney damage that leads reliably to GFR loss.1 In early published type 1 diabetes cohorts, macroalbuminuria was associated with a 15-year cumulative incidence of ESRD as high as 75%.2,3 However, contemporary long-term renal outcomes of macroalbuminuria have not been fully characterized.The Diabetes Control and Complications Trial (DCCT) and its observational follow-up, the Epidemiology of Diabetes Interventions and Complications (EDIC) study, present a valuable opportunity to examine macroalbuminuria and its long-term clinical outcomes. In DCCT/EDIC, the onset of macroalbuminuria can be defined with confidence using frequent longitudinal measurements of AER, participants have been followed for up to 25 years after the diagnosis of macroalbuminuria, and outcomes were meticulously recorded using standardized methods. Previous work in this cohort has shown that most cases of impaired GFR are preceded by macroalbuminuria,4 which is associated with a 50-fold higher risk of developing impaired GFR (eGFR<60 ml/min per 1.73 m2).5 Here, we extend these studies by comprehensively evaluating the long-term renal outcomes of incident macroalbuminuria in the DCCT/EDIC cohort and examining the risk factors for its progression to impaired GFR. 相似文献
75.
Nasim Janbozorgi Ramesh Allipour Kurosh Djafarian Sakineh Shab-Bidar Mostafa Badeli Maryam Safabakhsh 《Diabetes & Metabolic Syndrome: Clinical Research & Reviews》2021,15(4):102156
Background and aimsThe association of water intake with type 2 diabetes mellitus (T2DM) is still unclear. Therefore, the aim of this systematic review and meta-analysis was to synthesize the knowledge about the relationship between water intake and the risk of T2DM.MethodsWe conducted a systematic search in PubMed and Scopus up to June 2018 for observational studies. Risk ratios (RR)s and 95% confidence intervals (95% CI)s were calculated and fixed effects models were used.ResultsOverall, 6 studies were included in the meta-analyses. There was an inverse relationship between water intake and risk of T2DM (RR: 0.94; 95% CI: 0.91–0.97, P < 0.001) with low heterogeneity (I2 = 24%, P = 0.24).ConclusionOur findings indicated that the intake of water was correlated with reduced risk of type 2 diabetes in women and men. These results support the current recommendations of water intake as an inseparable part of a diet with the lowest risk of diabetes mellitus. 相似文献
76.
Jennifer M. Lynch Erin M. Buckley Peter J. Schwab Ann L. McCarthy Madeline E. Winters David R. Busch Rui Xiao Donna A. Goff Susan C. Nicolson Lisa M. Montenegro Stephanie Fuller J. William Gaynor Thomas L. Spray Arjun G. Yodh Maryam Y. Naim Daniel J. Licht 《The Journal of thoracic and cardiovascular surgery》2014
77.
78.
79.
Hadei Seyed Kamaledin Alvandi Maryam Ramezani Mehdi Aloosh Oldooz Shaghaghi Zahra Moradi Abbas 《Annals of nuclear medicine》2020,34(8):521-526
Annals of Nuclear Medicine - When using perfusion only modified PIOPED II criteria for PE detection, generated non-diagnostic scans are found to be the main diagnostic restriction. The objective of... 相似文献
80.