全文获取类型
收费全文 | 746篇 |
免费 | 54篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 28篇 |
妇产科学 | 8篇 |
基础医学 | 95篇 |
口腔科学 | 4篇 |
临床医学 | 42篇 |
内科学 | 250篇 |
皮肤病学 | 18篇 |
神经病学 | 38篇 |
特种医学 | 11篇 |
外科学 | 89篇 |
综合类 | 39篇 |
预防医学 | 43篇 |
眼科学 | 12篇 |
药学 | 71篇 |
中国医学 | 2篇 |
肿瘤学 | 46篇 |
出版年
2023年 | 4篇 |
2022年 | 8篇 |
2021年 | 21篇 |
2020年 | 9篇 |
2019年 | 7篇 |
2018年 | 8篇 |
2017年 | 11篇 |
2016年 | 11篇 |
2015年 | 12篇 |
2014年 | 14篇 |
2013年 | 25篇 |
2012年 | 35篇 |
2011年 | 45篇 |
2010年 | 19篇 |
2009年 | 17篇 |
2008年 | 40篇 |
2007年 | 27篇 |
2006年 | 34篇 |
2005年 | 32篇 |
2004年 | 22篇 |
2003年 | 28篇 |
2002年 | 28篇 |
2001年 | 23篇 |
2000年 | 24篇 |
1999年 | 23篇 |
1998年 | 14篇 |
1996年 | 12篇 |
1995年 | 7篇 |
1994年 | 7篇 |
1993年 | 4篇 |
1992年 | 30篇 |
1991年 | 28篇 |
1990年 | 21篇 |
1989年 | 8篇 |
1988年 | 12篇 |
1987年 | 11篇 |
1985年 | 14篇 |
1984年 | 12篇 |
1983年 | 8篇 |
1981年 | 3篇 |
1979年 | 4篇 |
1978年 | 4篇 |
1975年 | 3篇 |
1974年 | 5篇 |
1972年 | 12篇 |
1971年 | 5篇 |
1970年 | 7篇 |
1969年 | 9篇 |
1967年 | 10篇 |
1966年 | 5篇 |
排序方式: 共有802条查询结果,搜索用时 15 毫秒
71.
Kapil Chousalkar Richard Gast Francesca Martelli Vivek Pande 《Critical reviews in microbiology》2018,44(3):290-303
Globally, Salmonella enterica subsp. enterica is one of the most commonly reported causes of foodborne illness in humans. Contaminated food products of animal origin, particularly egg and egg products are frequently implicated in outbreaks of human salmonellosis. Salmonella enteritidis is frequently involved in egg and egg products-associated foodborne outbreaks in the USA and UK. However, in Australia and New Zealand, human infections caused by this serovar occur as a result of infection acquired while overseas travel, with Salmonella typhimurium being a predominant cause of local foodborne outbreaks. In this paper, an overview of Salmonella epidemiology on laying farms, egg-related Salmonella outbreaks in humans, and regulatory practises to control Salmonella across USA, UK, Australia and New Zealand is provided. Considering the estimated production of eggs in the USA, UK, Australia and New Zealand in 2015, the risk of foodborne illness in general is quite low for humans consuming eggs. Salmonella diagnostics, reporting and surveillance systems have improved over the years and will continue to improve in the years to come. However, given the number of different emerging Salmonella serovars a regular review of Salmonella control strategies from farm to fork is required. 相似文献
72.
Physics-based simulation provides a powerful framework for understanding biological form and function. Simulations can be used by biologists to study macromolecular assemblies and by clinicians to design treatments for diseases. Simulations help biomedical researchers understand the physical constraints on biological systems as they engineer novel drugs, synthetic tissues, medical devices, and surgical interventions. Although individual biomedical investigators make outstanding contributions to physics-based simulation, the field has been fragmented. Applications are typically limited to a single physical scale, and individual investigators usually must create their own software. These conditions created a major barrier to advancing simulation capabilities. In 2004, we established a National Center for Physics-Based Simulation of Biological Structures (Simbios) to help integrate the field and accelerate biomedical research. In 6 years, Simbios has become a vibrant national center, with collaborators in 16 states and eight countries. Simbios focuses on problems at both the molecular scale and the organismal level, with a long-term goal of uniting these in accurate multiscale simulations. 相似文献
73.
Pande C Sarin SK Patra S Bhutia K Mishra SK Pahuja S Jain M Srivastava S Dar SB Trivedi SS Mukhopadhyay CK Kumar A 《Journal of medical virology》2011,83(6):962-967
A large program was conducted by the Government of India to study the prevalence and profile of chronic hepatitis B virus (HBV) infection and its risk factors in pregnant women attending a tertiary care hospital in India. From September 2004 to December 2008 consecutive pregnant women attending the antenatal clinic were screened and those found positive for HBsAg were enrolled. Healthy non‐pregnant women of child‐bearing age, who presented for blood donation during the same period, served as controls. Women with symptoms of liver disease or those aware of their HBsAg status were excluded. Of the 20,104 pregnant women screened, 224 (1.1%) and of the 658 controls, 8 (1.2%) were HBsAg positive (P = ns). Previous blood transfusions and surgery were significant risk factors for infection with HBV. Of the women who were HBsAg positive, the ALT levels were normal in 54% of the women and HBV DNA levels were above 2,000 IU/ml in 71% of women. The median HBV DNA levels were higher in women who were HBeAg positive compared to the HBeAg negative group. The most common HBV genotype was D (84%) followed by A + D and A (8% each). In conclusion, the prevalence of HBsAg positivity among asymptomatic pregnant women in North India is 1.1% with 71% having high HBV DNA levels. These women may have a high risk of transmitting infection to their newborns. J. Med. Virol. 83:962–967, 2011. © 2011 Wiley‐Liss, Inc. 相似文献
74.
K. Kayan H. Johansson A. Oden S. Vasireddy K. Pande J. Orgee J. A. Kanis E. V. McCloskey 《Osteoporosis international》2009,20(12):2055-2061
Summary
Fall risk does not significantly impact on the efficacy of the bisphosphonate clodronate in reducing the incidence of fracture. 相似文献75.
E. V. McCloskey H. Johansson A. Oden S. Vasireddy K. Kayan K. Pande T. Jalava J. A. Kanis 《Osteoporosis international》2009,20(5):811-817
Summary
Fracture risk prediction can be enhanced by the concurrent assessment of other clinical risk factors. This study demonstrates that the estimation of an individual’s 10-year probability of fracture by the FRAX® algorithm identifies patients at high risk of fracture who will respond to bisphosphonate therapy.Introduction
Treatments for osteoporosis are targeted largely to patients with low bone density (BMD) or a prior fragility fracture. Fracture risk prediction can be enhanced by the concurrent assessment of other clinical risk factors, but it is important to determine whether the risk so identified can be reduced by intervention. We determined the effect of a bisphosphonate on fracture rates when risk was calculated using a new risk algorithm (FRAX®).Methods
Women aged 75 years or more were recruited to a randomised, double-blind controlled trial of 800 mg oral clodronate (Bonefos®) daily over 3 years. Baseline clinical risk factors were entered in the FRAX® model to compute the 10-year probability of major osteoporotic fractures with or without input of femoral neck BMD. The interaction between fracture probability and treatment efficacy was examined by Poisson regression.Results
In 3,974 women, the interaction between fracture probability and treatment efficacy was significant when probability was assessed without BMD (p?=?0.043), but not when BMD was included (p?=?0.10). Efficacy was more evident in those deemed at highest risk. For example women lying at the 75th percentile of fracture probability in the absence of BMD (10-year probability 24%) treatment reduced fracture risk by 27% (HR 0.73, 95%CI 0.58–0.92). In those with a fracture probability of 30% (90th percentile), the fracture risk reduction was 38% (HR 0.62, 0.46–0.84).Conclusions
The estimation of an individual’s 10-year probability of fracture by the FRAX® algorithm identifies patients at high risk of fracture who will respond to bisphosphonate therapy. 相似文献76.
77.
There is a large amount of research into maternal health as a health issue, but maternal health as a development issue has been less explored. This Review analyses the evidence from the past 20 years on the links between maternal health and development to examine maternal health within a development framework. We note that although existing evidence suggests that these links are strong, further research is needed to definitively substantiate how and to what extent maternal health and development affect each other. Further, we find that progress and investment in maternal health have lagged far behind estimates of what is needed to achieve the Millennium Development Goals. 相似文献
78.
McManus JJ Lomakin A Ogun O Pande A Basan M Pande J Benedek GB 《Proceedings of the National Academy of Sciences of the United States of America》2007,104(43):16856-16861
The P23T mutant of human gammaD-crystallin (HGD) is associated with cataract. We have previously investigated the solution properties of this mutant, as well as those of the closely related P23V and P23S mutants, and shown that although mutations at site 23 of HGD do not produce a significant structural change in the protein, they nevertheless profoundly alter the solubility of the protein. Remarkably, the solubility of the mutants decreases with increasing temperature, in sharp contrast to the behavior of the native protein. This inverted solubility corresponds to a strong increase in the binding energy with temperature. Here we have investigated the liquid-liquid coexistence curve and the diffusivity of the P23V mutant and find that these solution properties are unaffected by the mutation. This means that the chemical potentials in the solution phase are essentially unaltered. The apparent discrepancy between the interaction energies in the solution phase, as compared with the solid phase, is explicable in terms of highly anisotropic interprotein interactions, which are averaged out in the solution phase but are fully engaged in the solid phase. 相似文献
79.
80.
Guha S Mookerjee S Karmakar RN Mani S Pande A Bhattacharya R Hema MB 《Indian heart journal》2010,62(1):81-83
Lung malignancy extending into left atrium is seen very infrequently. We had a patient with a fast growing symptomatic lung mass and electrocardiogram showing persistent coving ST elevation without any biomarker change. Transthoracic echocardiography showed a large left atrial mass which was fixed to the free walls and extended into the appendage. There was also a large lung mass that was compressing the heart from its lateral aspect. CT-scan of chest corroborated the lung mass & CT-guided FNAC showed small cell carcinoma. 相似文献