全文获取类型
收费全文 | 296085篇 |
免费 | 17219篇 |
国内免费 | 414篇 |
专业分类
耳鼻咽喉 | 4205篇 |
儿科学 | 10283篇 |
妇产科学 | 10243篇 |
基础医学 | 44946篇 |
口腔科学 | 7496篇 |
临床医学 | 24149篇 |
内科学 | 55748篇 |
皮肤病学 | 6309篇 |
神经病学 | 20992篇 |
特种医学 | 11612篇 |
外国民族医学 | 43篇 |
外科学 | 46667篇 |
综合类 | 7765篇 |
现状与发展 | 1篇 |
一般理论 | 160篇 |
预防医学 | 19893篇 |
眼科学 | 6943篇 |
药学 | 20868篇 |
中国医学 | 787篇 |
肿瘤学 | 14608篇 |
出版年
2018年 | 3611篇 |
2017年 | 2650篇 |
2016年 | 3069篇 |
2015年 | 3487篇 |
2014年 | 4569篇 |
2013年 | 7200篇 |
2012年 | 9050篇 |
2011年 | 9435篇 |
2010年 | 6119篇 |
2009年 | 5544篇 |
2008年 | 8662篇 |
2007年 | 9509篇 |
2006年 | 9351篇 |
2005年 | 8945篇 |
2004年 | 8655篇 |
2003年 | 8158篇 |
2002年 | 7754篇 |
2001年 | 13319篇 |
2000年 | 13647篇 |
1999年 | 11417篇 |
1998年 | 3022篇 |
1997年 | 2788篇 |
1996年 | 2633篇 |
1995年 | 2544篇 |
1994年 | 2342篇 |
1992年 | 8312篇 |
1991年 | 8450篇 |
1990年 | 8262篇 |
1989年 | 8076篇 |
1988年 | 7313篇 |
1987年 | 7071篇 |
1986年 | 6719篇 |
1985年 | 6515篇 |
1984年 | 4760篇 |
1983年 | 4118篇 |
1982年 | 2469篇 |
1979年 | 4427篇 |
1978年 | 3228篇 |
1977年 | 2731篇 |
1976年 | 2503篇 |
1975年 | 2833篇 |
1974年 | 3352篇 |
1973年 | 3362篇 |
1972年 | 3118篇 |
1971年 | 2948篇 |
1970年 | 2838篇 |
1969年 | 2581篇 |
1968年 | 2538篇 |
1967年 | 2373篇 |
1966年 | 2264篇 |
排序方式: 共有10000条查询结果,搜索用时 12 毫秒
21.
Elhaji Youssef A.; Stoica Ileana; Dennis Sheldon; Purisima Enrico O.; Lumbroso Rose; Beitel Lenore K.; Trifiro Mark A. 《Human molecular genetics》2006,15(9):1561
Human Molecular Genetics (2006) 15, 921931; 相似文献
22.
An increase in the number of cases of tuberculosis, especially in children, has been observed recently. Post-vaccination conversion rate in babies immunised with BCG was assessed. Sensitization was detected as early as 4 weeks after BCG inoculation. Although 84.2% had physical evidence of BCG inoculation only 69.8% had developed detectable sensitization to the tubercle bacilli as shown by the Mantoux test. 相似文献
23.
24.
Most authors consider the principal advantage of FG anastomoses (compared to microsurgical anastomoses) to be shorter operating time, reduced surgical trauma to oviduct stumps, and absence of tissue ischemia. These features promote reparative regeneration and decrease adhesion formation, resulting in complete recanalization of fallopian tubes. To date, the majority of work on FG is confined to the experimental development of surgical techniques. Investigations in reconstructive gynecological surgery are quite uncommon. The physical properties of FG and the positive results of available experimental studies suggest that further development of surgical techniques using FG in obstetrics and gynecology is worthwhile. 相似文献
25.
Sustained eosinophil cationic protein release into tears after a single high-dose conjunctival allergen challenge 总被引:1,自引:0,他引:1
P. G. MONTAN M. VAN HAGE-HAMSTEN O. ZETTERSTRÖM† 《Clinical and experimental allergy》1996,26(10):1125-1130
Background The appearance of eosinophils is a hallmark sign of the allergic late-phase response (LPR). Eosinophil cationic protein (ECP), a readily measurable product released from activated eosinophils, has so far not been evaluated in the ocular LPR. Objective Two sets of trials were performed in order to investigate changes of local and systemic eosinophil activity and their possible link with symptoms and hyper-reactivity in the allergic LPR in the eye. Methods In the first experiment, ECP was analysed in tears and serum and the clinical reaction was evaluated during a 72-h time–course after a single, high-dose allergen challenge out of season in one eye of 15 pollen-sensitized volunteers. In a second experiment, the hypothesis of an increased clinical response to an allergen challenge in an eye that had been provoked with allergen 48h previously was tested in nine sensitized individuals. Results In the first experiment, symptoms at 10 min and 2, 4, 6, 8 and 24 h significantly exceeded base line scores of the challenged eyes. Tear ECP was significantly elevated in challenged eyes compared to contralateral eyes at 6, 8 and 24 h. In addition, symptoms and ECP release correlated significantly at the 24-h evaluation. Serum ECP remained unchanged throughout the study period. In the second experiment, conjunctival hyperreactivity 48h after an allergen challenge was not confirmed. Conclusion ECP secretion occurs in the experimental ocular LPR and is in part associated with the magnitude of the clinical reaction, which suggests a truly pathogenic role of the activated eosinophil in pollen-induced allergic conjunctivitis. 相似文献
26.
27.
Recurrent erosion 总被引:1,自引:0,他引:1
28.
Electrocardiographic symptoms were evaluated in 53 patients with an additional left-ventricular chorda (ALVC), detected by two-dimensional echocardiography. Signs of early ventricular repolarization (EVR) were identified in 45 (84.9%) patients. A transverse ALVC was more common in EVR-free patients (87.5%), as compared to patients with ALVC + EVR combinations (51.1%; p less than 0.05). 相似文献
29.
30.