全文获取类型
收费全文 | 8371篇 |
免费 | 509篇 |
国内免费 | 102篇 |
专业分类
耳鼻咽喉 | 124篇 |
儿科学 | 256篇 |
妇产科学 | 194篇 |
基础医学 | 1049篇 |
口腔科学 | 388篇 |
临床医学 | 766篇 |
内科学 | 2069篇 |
皮肤病学 | 195篇 |
神经病学 | 517篇 |
特种医学 | 611篇 |
外科学 | 905篇 |
综合类 | 57篇 |
一般理论 | 3篇 |
预防医学 | 636篇 |
眼科学 | 106篇 |
药学 | 593篇 |
中国医学 | 41篇 |
肿瘤学 | 472篇 |
出版年
2023年 | 44篇 |
2022年 | 142篇 |
2021年 | 230篇 |
2020年 | 134篇 |
2019年 | 227篇 |
2018年 | 275篇 |
2017年 | 178篇 |
2016年 | 221篇 |
2015年 | 262篇 |
2014年 | 313篇 |
2013年 | 368篇 |
2012年 | 515篇 |
2011年 | 518篇 |
2010年 | 326篇 |
2009年 | 298篇 |
2008年 | 401篇 |
2007年 | 431篇 |
2006年 | 327篇 |
2005年 | 312篇 |
2004年 | 275篇 |
2003年 | 265篇 |
2002年 | 233篇 |
2001年 | 206篇 |
2000年 | 189篇 |
1999年 | 199篇 |
1998年 | 163篇 |
1997年 | 152篇 |
1996年 | 148篇 |
1995年 | 122篇 |
1994年 | 118篇 |
1993年 | 101篇 |
1992年 | 99篇 |
1991年 | 112篇 |
1990年 | 108篇 |
1989年 | 72篇 |
1988年 | 74篇 |
1987年 | 85篇 |
1986年 | 80篇 |
1985年 | 89篇 |
1984年 | 53篇 |
1983年 | 54篇 |
1982年 | 35篇 |
1981年 | 39篇 |
1980年 | 36篇 |
1979年 | 42篇 |
1978年 | 29篇 |
1977年 | 32篇 |
1975年 | 31篇 |
1974年 | 28篇 |
1973年 | 26篇 |
排序方式: 共有8982条查询结果,搜索用时 15 毫秒
21.
22.
23.
N De Luccia M A Pinto J P Guedes M T Albers 《Prosthetics and orthotics international》1992,16(2):124-128
Rehabilitation of one hundred and twenty eight patients with lower limb amputation performed for vascular disease from 1979 to 1987 was assessed. Arteriosclerotic occlusive disease was the most frequent cause of amputation (85.9%). Sixty seven patients (52.3%) were diabetic. Early and late results were analysed. For long-term follow-up evaluation, Univariate method of Kaplan-Meyer product limit was employed. Multifactorial analysis was used to assess factors influencing mortality. On immediate evaluation of rehabilitation with a prosthesis 85.2% of patients were successfully fitted. On long term evaluation 47.8% of below-knee and 22.1% of above-knee amputees were alive and using the prosthesis full time at five years of follow-up (p = 0.0026). Opposite limb preservation at five years was 69.5% for diabetics and 90.2% for non-diabetics, respectively (p = 0.0013). Survival rate at five years was 42.4% for diabetics, and 85.0% for non-diabetics (p = 0.0002). On multifactorial analysis diabetic patients showed a risk of late mortality six times greater than non-diabetics. In conclusion rehabilitation after vascular amputation is feasible in a large number of patients, despite a limited life span. Diabetes represents a major risk factor both for life and for the opposite limb. Knee preservation is an important factor for better rehabilitation. 相似文献
24.
25.
Castor oil increases intestinal formation of platelet-activating factor and acid phosphatase release in the rat. 总被引:2,自引:2,他引:0
下载免费PDF全文
![点击此处可从《British journal of pharmacology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
A. Pinto A. Calignano N. Mascolo G. Autore F. Capasso 《British journal of pharmacology》1989,96(4):872-874
1. When castor oil was administered by gavage to rats, the duodenum and jejunum but not ileum and colon produced large amounts (5-6 fold greater than control) of platelet activating factor (Paf). 2. Intraluminal release of acid phosphatase (AP) was also markedly increased (5-6 fold greater than control) in the duodenum and jejunum of castor oil-treated rats and there was a correlation between the elevated release of AP and intestinal hyperaemia. 3. These findings support a role for Paf as a mediator of intestinal damage induced by castor oil. 相似文献
26.
27.
28.
M P Verenkar M J Pinto S Rodrigues W P Roque I Singh 《Indian journal of pathology & microbiology》1991,34(3):186-192
In the present series, 80 cases of dermatophytoses were subjected to mycological examination including microscopy and culture the mycological findings were correlated with clinical presentation of the patients. The isolation rate was 62.5 percent. Fungal culture was successful in 36.25 percent of cases, Trichophyton rubrum being the commonest etiological agent accounting for 55.18 percent of cases. 相似文献
29.
Pernes JM; Vitoux JF; Brenoit P; Raynaud A; Parola JL; Roth JP; Angel CY; Fiessinger JN; Roncato M; Gaux JC 《Radiology》1986,158(2):481-485
Thirty-five patients hospitalized for recent angiographically documented arterial occlusion in the legs (27 femoropopliteal arteries and eight grafts) benefited from local fibrinolytic therapy delivered at the site of the occlusion with a 4- or 5-F catheter. This therapy combined a continuous urokinase (UK) infusion of 1,000 U/kg/hour and a lysyl plasminogen (LYS-PLG) infusion of 15 microkatals every 30 minutes. Angiographically confirmed lysis was obtained in 85% of the cases. Only 3% of the patients had major and 6% had minor groin hematomas. Only two patients had concentrations of fibrinogen as low as 100 mg/dl. Intravascular infusion of UK-LYS-PLG is as effective as streptokinase. Its excellent tolerance makes it a good alternative in the treatment of acute ischemia in the lower limbs. 相似文献
30.
B Zingone B Benussi I Pinto A Cristaldi E Lusa A Pappalardo S Scardi B Branchini 《Giornale italiano di cardiologia》1988,18(6):449-455
Sixty-two patients with at least one prosthetic heart valve each underwent a total of 70 reoperations. Their cases were analysed with special regard to the risk of perioperative mortality and to the factors affecting that risk. The age of the patients studied was 47 +/- 14.6 years (mean +/- 1 SD), and 4.75 +/- 4 years had elapsed since their previous operation. A total of 85 prostheses were implanted at the time of initial surgery. Forty-nine of those were mitral, 28 were aortic, and 8 were tricuspid prostheses. There were 48 mechanical valves, 24 bioprostheses and 13 Carpentier rings (9 of the latter being mitral and 4 tricuspid). At reoperation (n = 70) 95 valves required treatment. Eighteen patients died following their first reoperation (18/62, 29%), and two more died after a second reoperation (2/8, 25%). Actuarial probability of hospital survivors being alive 8-9 years following reoperation was 47 +/- 15%. It was found by multiple regression analysis that the duration of cardiopulmonary bypass (p less than 0.01), surgical priority (p less than 0.05) and the patient's age (p less than 0.05) were the only independent predictors of hospital death. A review of the literature and our own results suggest that surgical problems encountered with reoperation have unfavourably affected surgical results in the past. Objective risk factors are currently more related to the operative outcome. For these to be neutralised, patients with dysfunctioning prosthetic heart valves should be operated at an early stage before they reach a critical one. Only patients with stable, mild dysfunction unlikely to worsen acutely may probably be followed-up safely. 相似文献