全文获取类型
收费全文 | 3172篇 |
免费 | 279篇 |
国内免费 | 12篇 |
专业分类
耳鼻咽喉 | 30篇 |
儿科学 | 63篇 |
妇产科学 | 35篇 |
基础医学 | 423篇 |
口腔科学 | 404篇 |
临床医学 | 282篇 |
内科学 | 616篇 |
皮肤病学 | 122篇 |
神经病学 | 183篇 |
特种医学 | 245篇 |
外科学 | 429篇 |
综合类 | 13篇 |
一般理论 | 1篇 |
预防医学 | 279篇 |
眼科学 | 58篇 |
药学 | 131篇 |
中国医学 | 11篇 |
肿瘤学 | 138篇 |
出版年
2023年 | 36篇 |
2022年 | 49篇 |
2021年 | 98篇 |
2020年 | 80篇 |
2019年 | 86篇 |
2018年 | 140篇 |
2017年 | 89篇 |
2016年 | 87篇 |
2015年 | 105篇 |
2014年 | 169篇 |
2013年 | 203篇 |
2012年 | 271篇 |
2011年 | 235篇 |
2010年 | 169篇 |
2009年 | 170篇 |
2008年 | 186篇 |
2007年 | 192篇 |
2006年 | 154篇 |
2005年 | 124篇 |
2004年 | 105篇 |
2003年 | 80篇 |
2002年 | 70篇 |
2001年 | 57篇 |
2000年 | 49篇 |
1999年 | 42篇 |
1998年 | 32篇 |
1997年 | 25篇 |
1996年 | 25篇 |
1995年 | 21篇 |
1994年 | 14篇 |
1993年 | 23篇 |
1992年 | 25篇 |
1991年 | 18篇 |
1990年 | 16篇 |
1989年 | 27篇 |
1988年 | 25篇 |
1987年 | 18篇 |
1986年 | 19篇 |
1985年 | 20篇 |
1984年 | 6篇 |
1983年 | 8篇 |
1982年 | 10篇 |
1981年 | 8篇 |
1980年 | 10篇 |
1979年 | 7篇 |
1978年 | 5篇 |
1977年 | 9篇 |
1976年 | 10篇 |
1969年 | 9篇 |
1968年 | 4篇 |
排序方式: 共有3463条查询结果,搜索用时 234 毫秒
41.
ReSllm6 Objectif Nos studes Precedentes out montrd une panne fonCtion de la greffe pulmonaire traitde Prdalablementper perfusion forcde retrograde et un stockage d froid inns ~. L' etude Prdsente a pour but de determiner l' effet de ~ surlefiot mngUin du poumon trait4 Prdalablement per perfusion retrograde forcde et un stockage d froid. met~. 12poumons donneurs canins out ate trait4s per perfusion r4tFograde de solution UW. Chez 6 animaux du grouch A, 250ng furent injectes dans l' artrdre… 相似文献
42.
Chlorhexidine susceptibility and Eagle effect in planktonic cells and biofilm of nosocomial isolates
Marchi Ana Paula Farrel Côrtes Marina Vásconez Noguera Saidy Rossi Flavia Levin Anna Sara Figueiredo Costa Silvia Perdigão Neto Lauro Vieira 《European journal of clinical microbiology & infectious diseases》2023,42(6):787-792
European Journal of Clinical Microbiology & Infectious Diseases - The aim of this study is to evaluate the chlorhexidine gluconate (CHG) susceptibility in both planktonic cells and biofilm of... 相似文献
43.
Three institutions worked together in order to combat early weaning in a peripheric district of Belo Horizonte (Brazil): the Department of Pediatrics of the Faculty of Medicine (Federal University of Minas Gerais), the Secretary of Health of Belo Horizonte and a Brazilian assistential institution ("LBA"). One initial survey, in 1980, documented breast-feeding practices in this community, when there were no systematized actions of incentive to human milk, at local or national levels. Two similar surveys were also conducted, in 1986 and in 1992. In each one, 152 mothers with children under two years old were randomly selected and interviewed. The results showed significant progress in the breast-feeding period in the first six years, and a stabilization between 1986 and 1992. For example: if only 39.0% of the children received human milk for six months or more in 1980, 54.3% received it in 1986 and 52.4% in 1992. In 1980, 80.6% of the children were nourished with cow's milk before three months of age, to 56.5% in 1986 and 56.3% in 1992. Prenatal influence to increase the level of breast-feeding has always been weak. Besides, a reflux was detected in the last few years with regard to the participation of the maternity hospital in the educative process. 相似文献
44.
L F Poli de Figueiredo L M Malbouisson E Y Varicoda M J Carmona J O Auler M Rocha e Silva 《The Journal of trauma》1999,47(2):288-293
BACKGROUND: It has been suggested that measurement of continuous cardiac output (CCO) is an advancement in the management of critically ill patients. Our objective was to determine the accuracy of CCO during the rapid hemodynamic changes induced by hemorrhage and resuscitation. METHODS: In 12 anesthetized dogs (20.2+/-0.9 kg), pulmonary artery blood flow, our "gold standard" cardiac output, was measured with an sonographic flowprobe, whereas CCO, intermittent bolus cardiac output (ICO), and mixed venous oxygen saturation were measured with a thermodilution fiberoptic pulmonary artery catheter with a thermal filament. A graded hemorrhage (20 mL/min) was produced to a mean arterial pressure of 40 mm Hg, which was maintained at this level for 30 minutes. Total shed blood volume (701+/-53 mL) was retransfused at a rate of 40 mL/min, over 30 minutes, after which a massive hemorrhage (100 mL/min) was produced over 10 minutes. RESULTS: Hemorrhage induced significant decreases in mean arterial pressure, mixed venous oxygen saturation, and oxygen delivery, which were all restored during early resuscitation. However, CCO showed a delayed response after hemorrhage and resuscitation, compared with pulmonary blood flow, throughout the study (r = 0.549), matching only at baseline and at the end of both graded hemorrhage and resuscitation periods. There was a good correlation between ICO and pulmonary artery blood flow (r = 0.964) and no significant differences between them throughout the study. CONCLUSION: CCO has a delayed response during acute hemodynamic changes induced by hemorrhage and resuscitation. When sudden changes in mean arterial pressure or in mixed venous oxygen saturation are detected, cardiac output must be estimated by the standard bolus thermodilution technique, not by CCO. 相似文献
45.
46.
47.
48.
Francis Balduino Guimarães Santos Jose Jacinto Branco Vasconcelos-Raposo Maria do Carmo Tolentino Figueiredo 《Revista brasileira de otorrinolaringologia (English ed.)》2013,79(6):673-680
There still are many clinical and biological aspects of the natural history of cancer of the upper aerodigestive tract to be unveiled; which in Brazil is a direct consequence of the failure of systematic prevention and early diagnosis campaigns.ObjectiveTo analyze the signs and symptoms presented by patients with the disease at initial and advanced stages. Other variables such as disease duration, general and nutritional status were considered.MethodA historical cohort study with a cross-section involving 895 subjects with cancer of the upper aerodigestive tract.ResultsClinical findings were not statistically correlated with disease progression, nor with the disease in early stages, but it showed rapid disease development.ConclusionThe results suggest a disease of insidious onset in the early stages and fast course afterwards. The long disease duration - greater than three months, was associated with worsening in general and nutritional states of patients. 相似文献
49.
Bernard Salame Gemaque Alex Junior Souza de Souza Manoel do Carmo Pereira Soares Andreza Pinheiro Malheiros Andrea Lima Silva Max Moreira Alves Michele Soares Gomes-Gouvêa Jo?o Renato Rebello Pinho Heriberto Ferreira de Figueiredo Djacy Barbosa Ribeiro Jonan Souza da Silva Leopoldo Augusto Moraes Ana Silvia Sardinha Ribeiro Washington Luiz Assun??o Pereira 《Emerging infectious diseases》2014,20(12):2180-2182
50.
Rupioid lesions,PLEVA and superposition phenomenon in malignant syphilis: two case reports in HIV‐infected patients
下载免费PDF全文
![点击此处可从《Journal of the European Academy of Dermatology and Venereology》网站下载免费的PDF全文](/ch/ext_images/free.gif)