全文获取类型
收费全文 | 1836251篇 |
免费 | 138847篇 |
国内免费 | 3774篇 |
专业分类
耳鼻咽喉 | 24338篇 |
儿科学 | 60200篇 |
妇产科学 | 51984篇 |
基础医学 | 271915篇 |
口腔科学 | 50151篇 |
临床医学 | 163924篇 |
内科学 | 358045篇 |
皮肤病学 | 43024篇 |
神经病学 | 145650篇 |
特种医学 | 68944篇 |
外国民族医学 | 523篇 |
外科学 | 274537篇 |
综合类 | 39727篇 |
现状与发展 | 3篇 |
一般理论 | 581篇 |
预防医学 | 143753篇 |
眼科学 | 41869篇 |
药学 | 133023篇 |
1篇 | |
中国医学 | 4137篇 |
肿瘤学 | 102543篇 |
出版年
2018年 | 20251篇 |
2017年 | 15354篇 |
2016年 | 17341篇 |
2015年 | 19419篇 |
2014年 | 27207篇 |
2013年 | 40821篇 |
2012年 | 55489篇 |
2011年 | 59192篇 |
2010年 | 34747篇 |
2009年 | 33081篇 |
2008年 | 55008篇 |
2007年 | 58480篇 |
2006年 | 59267篇 |
2005年 | 57229篇 |
2004年 | 54965篇 |
2003年 | 52471篇 |
2002年 | 50985篇 |
2001年 | 90995篇 |
2000年 | 93273篇 |
1999年 | 77187篇 |
1998年 | 21319篇 |
1997年 | 19104篇 |
1996年 | 19422篇 |
1995年 | 18354篇 |
1994年 | 16783篇 |
1993年 | 15832篇 |
1992年 | 58487篇 |
1991年 | 56939篇 |
1990年 | 55246篇 |
1989年 | 52836篇 |
1988年 | 48491篇 |
1987年 | 47622篇 |
1986年 | 44511篇 |
1985年 | 42497篇 |
1984年 | 32185篇 |
1983年 | 27156篇 |
1982年 | 16052篇 |
1981年 | 14399篇 |
1979年 | 28972篇 |
1978年 | 20643篇 |
1977年 | 17193篇 |
1976年 | 16394篇 |
1975年 | 17447篇 |
1974年 | 21003篇 |
1973年 | 20031篇 |
1972年 | 18977篇 |
1971年 | 17636篇 |
1970年 | 16544篇 |
1969年 | 15551篇 |
1968年 | 14716篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
The results of clinical trials of ditrastic, an agent manufactured by Orion, Finland, are analyzed. The drug contains 1.5 or 3% of ditranol. Of the 59 patients treated with this drug complete resolution of clinical eruptions was achieved in 43, the condition of 10 patients considerably improved, a partial effect was observed in 4, and no effect in 2 patients. Therefore ditrastic has proved to be a highly effective agent for the treatment of psoriasis, convenient for outpatient therapy. 相似文献
992.
As the fields of astronomy, cosmology, and space travel move rapidly forward, so must space medicine. The manned space program and medical knowledge and support have developed in tandem. Dermatology will play a fundamental role in survival during space flight. This paper reviews past, present, and future accomplishments of the space program as they relate to medicine and characterizes some of dermatology's multiple roles in the future. It further explores the immunologic alterations noted during space flight and the attendant implications for health and well-being both in flight and on return to Earth, or to an Earthlike environment. 相似文献
993.
C Vaishnavi C Sokhey S Kaur B Kumar J B Dilawari N K Ganguly 《Indian journal of leprosy》1989,61(2):211-215
An ELISA technique has been developed to detect HBsAg in the sera of leprosy patients. Out of ninety-two serum samples taken from untreated leprosy patients, 10 samples were positive for HBsAg. The ELISA used in the present investigation is a low cost, reliable and sensitive marker of HBsAg. It is better than lesser sensitive (haemagglutination and counterimmunoelectrophoresis), costly and hazardous (radioimmunoassay) techniques and is therefore recommended for routine use. 相似文献
994.
C E Paniak D L Shore B P Rourke 《Journal of clinical and experimental neuropsychology》1989,11(5):631-644
This study examined selective reminding and recognition memory performance of 21 severe closed-head injured patients tested within 6 months of regaining consciousness and then again after at least 1 year. Performances on selective reminding parameters were highly correlated and patients performed significantly worse at both testings than did hospitalized controls matched for age, education, and sex. Patients improved from testing 1 to testing 2 on only four of six memory variables. Average Impairment Rating at testing 1 was a marginally better predictor of memory performance at testing 2 than was length of coma. Results are discussed in terms of (a) utility of selective reminding parameters and predictors of outcome and (b) dissociations in recovery of memory parameters. 相似文献
995.
C Pereira Alves 《Phlébologie》1989,42(4):585-589
Varitest plethysmography is a non-invasive diagnostic method of venous insufficiency based on the study of the emptying of leg veins by flexion movements and their subsequent filling. The Varitest records the curves and measurements of these two stages. The physiological bases of the test and its technique are presented. Our experience, following the first few cases, enabled us to identify three main groups of patients:--Patients presenting chronic symptoms, in whom the clinical examination was negative or not obvious;--Patients presenting a problem of differential diagnosis with a deep/superficial or mixed chronic venous insufficiency. It also enabled us to specify the results of the treatments. According to our results, Varitest is a simple, easy to reproduce method, presenting a sensitivity and specificity with regard to the clinical symptoms and the Doppler, of approximately 80%. Its negative aspects are the poor collaboration of the patients or their inability to be available in order to study acute venous thromboses. 相似文献
996.
Concurrent positive serology for ehrlichiosis and Lyme disease 总被引:1,自引:0,他引:1
997.
998.
J L Dubois-Randé D Loisance A M Duval-Moulin P Deleuze D Lellouche O Tavolaro L Hittinger C Benvenuti P Merlet D Brun 《Archives des maladies du coeur et des vaisseaux》1989,82(8):1433-1438
Enoximone is a positive inotropic agent belonging to the group of phosphodiesterase F-III inhibitors. The drug was tested in 34 patients uncontrolled by sympathomimetic drugs and referred to our department for urgent heart transplantation or circulatory assistance. After insertion of a Swan-Ganzgatheter and a radial artery catheter for haemodynamic monitoring, enoximone was administered as a 15-minute intravenous bolus injection of 1 to 2.5 mg/kf every 8 hours, in addition to sympathomimetic agents. Clinical and haemodynamic improvement was observed after thirty minutes in 30 patients. The cardiac index rose from 1.82 to 2.67 l/min/m2 and the pulmonary wedge pressure fell from 30.8 to 18.9 mmHg. Systemic arterial resistance decreased from 2170 to 1520 dyn. s. cm-5, and pulmonary resistance from 5.5 to 4.6 Wood units (p less than 0.01 for all values). Four patients had no haemodynamic improvement and were put on circulatory assistance, using a Jarvik 7 total artificial heart in 3 of them and heterotopic circulatory assistance in one. After clinical investigation for contra-indication to heart transplantation, and as their improved haemodynamic status permitted, 12 of the 30 patients were considered suitable (group B) for heart transplantation. Transplantation was performed within a week of admission in 11 patients without any need for mechanical assistance. One of the group B patients who required implantation of a Jarvik 7 artificial heart died after 12 hours of assistance. Eighteen patients were considered unsuitable for transplantation (group A) and treated medically.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
999.
1000.