全文获取类型
收费全文 | 15245篇 |
免费 | 1215篇 |
国内免费 | 50篇 |
专业分类
耳鼻咽喉 | 336篇 |
儿科学 | 471篇 |
妇产科学 | 312篇 |
基础医学 | 2058篇 |
口腔科学 | 299篇 |
临床医学 | 1547篇 |
内科学 | 2785篇 |
皮肤病学 | 116篇 |
神经病学 | 1738篇 |
特种医学 | 659篇 |
外科学 | 2542篇 |
综合类 | 210篇 |
一般理论 | 10篇 |
预防医学 | 1281篇 |
眼科学 | 473篇 |
药学 | 906篇 |
中国医学 | 11篇 |
肿瘤学 | 756篇 |
出版年
2021年 | 325篇 |
2020年 | 197篇 |
2019年 | 307篇 |
2018年 | 387篇 |
2017年 | 306篇 |
2016年 | 285篇 |
2015年 | 319篇 |
2014年 | 481篇 |
2013年 | 679篇 |
2012年 | 1014篇 |
2011年 | 981篇 |
2010年 | 604篇 |
2009年 | 469篇 |
2008年 | 826篇 |
2007年 | 883篇 |
2006年 | 920篇 |
2005年 | 870篇 |
2004年 | 722篇 |
2003年 | 773篇 |
2002年 | 703篇 |
2001年 | 289篇 |
2000年 | 256篇 |
1999年 | 269篇 |
1998年 | 174篇 |
1997年 | 115篇 |
1996年 | 140篇 |
1995年 | 102篇 |
1994年 | 102篇 |
1993年 | 100篇 |
1992年 | 190篇 |
1991年 | 197篇 |
1990年 | 190篇 |
1989年 | 162篇 |
1988年 | 145篇 |
1987年 | 172篇 |
1986年 | 136篇 |
1985年 | 149篇 |
1984年 | 122篇 |
1983年 | 112篇 |
1982年 | 86篇 |
1981年 | 85篇 |
1980年 | 81篇 |
1979年 | 90篇 |
1978年 | 91篇 |
1977年 | 73篇 |
1976年 | 74篇 |
1975年 | 62篇 |
1974年 | 80篇 |
1973年 | 64篇 |
1972年 | 66篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
11.
Andrea J. Radtke Evelyn Kandov Bradley Lowekamp Emily Speranza Colin J. Chu Anita Gola Nishant Thakur Rochelle Shih Li Yao Ziv Rafael Yaniv Rebecca T. Beuschel Juraj Kabat Joshua Croteau Jeremy Davis Jonathan M. Hernandez Ronald N. Germain 《Proceedings of the National Academy of Sciences of the United States of America》2020,117(52):33455
12.
Neurodegenerative diseases are an ever-increasing burden in an aging society.Currently no cure is available for any of these diseases and treatment is based on managing symptoms.Despite many candidate therapeutics demonstrating promise in animal models,none has yet shown efficacy in human trials.It is self-evident that humans are different from the animals used to model our diseases,especially models that have been highly manipulated to generate a disease in an animal that does not naturally have such a disease.These differences are likely the reason for the failures of drug candidates in human trials but,until recently,human models of neurodegenerative diseases were lacking.The development of the human cerebral organoid model,by differentiating three-dimensional human neuronal tissue from pluripotent stem cells,represents a significant advance in studying human brain diseases.Cerebral organoids have been used to model Alzheimer’s disease,Parkinson’s disease,Down’s syndrome dementia and we have now shown they can be infected with human prions creating a new model of human prion diseases. 相似文献
13.
14.
15.
Robert E. Hurst Beverley Greenwood-Van Meerveld Amy B. Wisniewski Samuel VanGordon HsuehKung Lin Bradley P. Kropp Rheal A. Towner 《Translational andrology and urology》2015,4(5):563-571
The definition of interstitial cystitis (IC) has evolved over the years from being a well-defined entity characterized by diagnostic lesion (Hunner’s ulcer) in the urothelium to a clinical diagnosis by exclusion [painful bladder syndrome (PBS)]. Although the etiology is unknown, a central theme has been an association with increased permeability of the bladder. This article reviews the evidence for increased permeability being important to the symptoms of interstitial cystitis/painful bladder syndrome (IC/PBS) and in treating the disorder. Recent work showing cross-communication among visceral organs is also reviewed to provide a basis for understanding IC/PBS as a systemic disorder of a complex, interconnected system consisting of the bladder, bowel and other organs, nerves, cytokine-responding cells and the nervous system. 相似文献
16.
Noah Switzer Elijah Dixon Jill Tinmouth Nori Bradley Melina Vassiliou Steve Schwaitzberg Anthony Gomes James Ellsmere Chris de Gara 《Journal canadien de gastroenterologie》2015,29(5):259-265
This 2014 roundtable discussion, hosted by the Canadian Association of General Surgeons, brought together general surgeons and gastroenterologists with expertise in endoscopy from across Canada to discuss the state of endoscopy in Canada. The focus of the roundtable was the evaluation of the competence of general surgeons at endoscopy, reviewing quality assurance parameters for high-quality endoscopy, measuring and assessing surgical resident preparedness for endoscopy practice, evaluating credentialing programs for the endosuite and predicting the future of endoscopic services in Canada. The roundtable noted several important observations. There exist inadequacies in both resident training and the assessment of competency in endoscopy. From these observations, several collaborative recommendations were then stated. These included the need for a formal and standardized system of both accreditation and training endoscopists. 相似文献
17.
Suchi Raghunathan Corey L. Reynolds Robert J. Schwartz M. David Stewart Bradley K. McConnell 《Fundamental & clinical pharmacology》2019,33(1):25-30
Inbred mouse strains are the most widely used mammalian model organism in biomedical research owing to ease of genetic manipulation and short lifespan; however, each inbred strain possesses a unique repertoire of deleterious homozygous alleles that can make a specific strain more susceptible to a particular disease. In the current study, we report dystrophic cardiac calcinosis (DCC) in C.B‐17 SCID male mice at 10 weeks of age with no significant change in cardiac function. Acquisition of DCC was characterized by myocardial injury, fibrosis, calcification, and necrosis of the tissue. At 10 weeks of age, 38% of the C.B‐17 SCID mice from two different commercial colonies exhibited significant calcinosis on the ventricular epicardium, predominantly on the right ventricle. The frequency of calcinosis was more than 50% for mice obtained from Taconic's Cambridge City colony and 25% for mice obtained from Taconic's German Town colony. Interestingly, the DCC phenotype did not affect cardiac function at 10 weeks of age. No differences in echocardiography or electrocardiography were observed between the calcinotic and non‐calcinotic mice from either colony. Our findings suggest that C.B‐17 SCID mice exhibit DCC as early as 10 weeks of age with no significant impact on cardiac function. This strain of mice should be cautiously considered for the study of cardiac physiology. 相似文献
18.
19.
20.