全文获取类型
收费全文 | 492篇 |
免费 | 23篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 7篇 |
儿科学 | 44篇 |
妇产科学 | 7篇 |
基础医学 | 47篇 |
口腔科学 | 24篇 |
临床医学 | 28篇 |
内科学 | 72篇 |
皮肤病学 | 12篇 |
神经病学 | 7篇 |
特种医学 | 91篇 |
外科学 | 41篇 |
综合类 | 64篇 |
预防医学 | 14篇 |
眼科学 | 17篇 |
药学 | 16篇 |
肿瘤学 | 28篇 |
出版年
2023年 | 1篇 |
2022年 | 6篇 |
2021年 | 6篇 |
2020年 | 6篇 |
2019年 | 2篇 |
2018年 | 8篇 |
2017年 | 6篇 |
2016年 | 7篇 |
2015年 | 16篇 |
2014年 | 6篇 |
2013年 | 8篇 |
2012年 | 14篇 |
2011年 | 18篇 |
2010年 | 23篇 |
2009年 | 18篇 |
2008年 | 18篇 |
2007年 | 18篇 |
2006年 | 17篇 |
2005年 | 19篇 |
2004年 | 7篇 |
2003年 | 7篇 |
2002年 | 14篇 |
2001年 | 12篇 |
2000年 | 12篇 |
1999年 | 15篇 |
1998年 | 33篇 |
1997年 | 23篇 |
1996年 | 18篇 |
1995年 | 17篇 |
1994年 | 13篇 |
1993年 | 11篇 |
1992年 | 5篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 15篇 |
1988年 | 11篇 |
1987年 | 16篇 |
1986年 | 11篇 |
1985年 | 5篇 |
1984年 | 7篇 |
1983年 | 7篇 |
1982年 | 7篇 |
1981年 | 5篇 |
1980年 | 5篇 |
1978年 | 2篇 |
1977年 | 1篇 |
1976年 | 3篇 |
1975年 | 9篇 |
1972年 | 2篇 |
1969年 | 2篇 |
排序方式: 共有519条查询结果,搜索用时 9 毫秒
71.
Rajni Gupta Jugal Kishore Yogesh Bansal MK Daga RC Jiloha Rajeev Singal GK Ingle 《Indian Journal of Community Medicine》2011,36(3):182-186
Objective:
To investigate the relationship of psychosocial factors (lack of social support, stress and subjective well-being) and personality traits with myocardial infarction (MI).Materials and Methods:
A case–control study involving 100 cases and 100 matched controls was conducted in Lok Nayak Hospital, New Delhi.Results:
Stress over 1 year was significantly higher in cases (P < 0.001). However, difference was not significant when scores of social support (P = 0.2), Presumptive Stressful Life Event (PSLE) over lifetime (P = 0.058) and subjective well-being (P = 0.987) were compared. MI was significantly associated with hyperactive (P < 0.001), dominant (P = 0.03), egoistic (P < 0.001) and introvert (P < 0.001) personalities.Conclusion:
Certain personality traits and recent stress may be important risk factors of MI, especially in Indians. The finding may have implications on the preventive strategies planned for MI patients. 相似文献72.
73.
74.
Background: Obesity/overweight is a recognized risk factor for a host of disorders. The disease risk stratification is commonly based on the Quetelets Index (Body Mass Index-BMI), a surrogate measure of fatness. The currently used BMI cut-offs to classify people as overweight or obese in Armed Forces have been defined in studies on Caucasian populations. However, because of differences in body structure and composition in different ethnic, socioeconomic, cultural and regional groups the correspondence between BMI and body fat content varies between populations. We conducted this pilot study in the Indian Navy to define BMI cut-offs for overweight and obesity using body fat content derived from Skin Fold Thickness as the standard. 相似文献
75.
76.
77.
Background
The pathogenesis of HIV/hepatitis C virus (HCV) coinfection is poorly understood. We examined markers of oxidative stress, plasma antioxidants and liver disease in HIV/HCV‐coinfected and HIV‐monoinfected adults.Methods
Demographics, medical history, and proof of infection with HIV, hepatitis A virus (HAV), hepatitis B virus (HBV) and HCV were obtained. HIV viral load, CD4 cell count, complete blood count (CBC), complete metabolic panel, lipid profile, and plasma concentrations of zinc, selenium, and vitamins A and E were determined. Malondialdehyde (MDA) and glutathione peroxidase concentrations were obtained as measures of oxidative stress. Aminotransferase to platelet ratio index (APRI) and fibrosis index (FIB‐4) markers were calculated.Results
Significant differences were found between HIV/HCV‐coinfected and HIV‐monoinfected participants in levels of alanine aminotransferase (ALT) (mean±standard deviation: 51.4±50.6 vs. 31.9±43.1 U/L, respectively; P=0.014), aspartate aminotransferase (AST) (56.2±40.9 vs. 34.4±30.2 U/L; P<0.001), APRI (0.52±0.37 vs. 0.255±0.145; P=0.0001), FIB‐4 (1.64±.0.91 vs. 1.03±0.11; P=0.0015) and plasma albumin (3.74±0.65 vs. 3.94±0.52 g/dL; P=0.038). There were no significant differences in CD4 cell count, HIV viral load or antiretroviral therapy (ART) between groups. Mean MDA was significantly higher (1.897±0.835 vs. 1.344± 0.223 nmol/mL, respectively; P=0.006) and plasma antioxidant concentrations were significantly lower [vitamin A, 39.5 ± 14.1 vs. 52.4±16.2 μg/dL, respectively (P=0.0004); vitamin E, 8.29±2.1 vs. 9.89±4.5 μg/mL (P=0.043); zinc, 0.61±0.14 vs. 0.67±0.15 mg/L (P=0.016)] in the HIV/HCV‐coinfected participants than in the HIV‐monoinfected participants, and these differences remained significant after adjusting for age, gender, CD4 cell count, HIV viral load, injecting drug use and race. There were no significant differences in glutathione peroxidase concentration, selenium concentration, body mass index (BMI), alcohol use or tobacco use between groups. Glutathione peroxidase concentration significantly increased as liver disease advanced, as measured by APRI (β=0.00118; P=0.0082) and FIB‐4 (β=0.0029; P=0.0177). Vitamin A concentration significantly decreased (β=?0.00581; P=0.0417) as APRI increased.Conclusion
HIV/HCV coinfection is associated with increased oxidative stress and decreased plasma antioxidant concentrations compared with HIV monoinfection. Research is needed to determine whether antioxidant supplementation delays liver disease in HIV/HCV coinfection.78.
79.
Traditionally, the definitive diagnosis of periapical lesion depends on histopathological examination of the tissues, which is impractical in cases planned for nonsurgical treatment. Recently, some authors have used ultrasound with power Doppler and computed tomography in differential diagnosis between a cyst and a granuloma. The aim of this study was to evaluate and compare the use of computed tomography (CT) scan and ultrasound with power Doppler flowmetry in differential diagnosis of periapical lesions. Twelve periapical lesions were imaged with the help of CT scans and ultrasound with color-power Doppler flowmetry. A provisional preoperative diagnosis was made based on history, clinical presentation, and radiographic features. The cases were treated by surgical endodontics. In all 12 cases, the diagnosis with CT scan and ultrasound coincided with the histopathological diagnosis of the lesions. It is proposed that CT scans and ultrasound with power Doppler flowmetry can provide an additional dignostic tool without invasive surgery, where treatment option is nonsurgical. 相似文献
80.
Morey Haymond Anne-Marie Kappelgaard Paul Czernichow Beverly MK Biller Koji Takano Wieland Kiess The participants in the global advisory panel meeting on the effects of growth hormone 《Acta paediatrica (Oslo, Norway : 1992)》2013,102(8):787-796
Normal growth is a sign of good health. Monitoring for growth disturbances is fundamental to children's health care. Early detection and diagnosis of the causes of short stature allows management of underlying medical conditions, optimizing attainment of good health and normal adult height.