全文获取类型
收费全文 | 205613篇 |
免费 | 4706篇 |
国内免费 | 479篇 |
专业分类
耳鼻咽喉 | 2878篇 |
儿科学 | 7819篇 |
妇产科学 | 6004篇 |
基础医学 | 26946篇 |
口腔科学 | 6206篇 |
临床医学 | 16099篇 |
内科学 | 37066篇 |
皮肤病学 | 4815篇 |
神经病学 | 12694篇 |
特种医学 | 11086篇 |
外国民族医学 | 100篇 |
外科学 | 30994篇 |
综合类 | 1179篇 |
一般理论 | 4篇 |
预防医学 | 16925篇 |
眼科学 | 4617篇 |
药学 | 14150篇 |
2篇 | |
中国医学 | 154篇 |
肿瘤学 | 11060篇 |
出版年
2018年 | 3680篇 |
2017年 | 4049篇 |
2016年 | 3330篇 |
2015年 | 5073篇 |
2014年 | 4518篇 |
2013年 | 3708篇 |
2012年 | 10248篇 |
2011年 | 5207篇 |
2010年 | 2508篇 |
2009年 | 4153篇 |
2008年 | 2617篇 |
2007年 | 3346篇 |
2006年 | 3582篇 |
2005年 | 11673篇 |
2004年 | 13196篇 |
2003年 | 8768篇 |
2002年 | 3952篇 |
2001年 | 4664篇 |
2000年 | 1989篇 |
1999年 | 6126篇 |
1998年 | 683篇 |
1996年 | 496篇 |
1992年 | 7015篇 |
1991年 | 7234篇 |
1990年 | 7500篇 |
1989年 | 7127篇 |
1988年 | 6614篇 |
1987年 | 6384篇 |
1986年 | 6084篇 |
1985年 | 5389篇 |
1984年 | 3705篇 |
1983年 | 3008篇 |
1982年 | 1061篇 |
1981年 | 813篇 |
1980年 | 901篇 |
1979年 | 3930篇 |
1978年 | 2437篇 |
1977年 | 1852篇 |
1976年 | 1595篇 |
1975年 | 2524篇 |
1974年 | 3179篇 |
1973年 | 2805篇 |
1972年 | 2832篇 |
1971年 | 2774篇 |
1970年 | 2612篇 |
1969年 | 2512篇 |
1968年 | 2288篇 |
1967年 | 2207篇 |
1966年 | 1949篇 |
1965年 | 1159篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
A significant increase of LDL-apolipoprotein B by 13% and LDL-cholesterol by 19% was observed in a group of 9 patients with hyperlipoproteinaemia Type III after bezafibrate treatment. Additional administration of colestipol caused a significant decrease of both LDL-apolipoprotein B by 18% and LDL-cholesterol by 25%. In 10 patients of hyperlipoproteinaemia Type IIb a significant decrease of both LDL-apolipoprotein B by 28% and LDL-apolipoprotein B by 18% was observed after bezafibrate therapy. When bezafibrate was given together with colestipol a further decrease of both LDL-cholesterol by 17% and LDL-apolipoprotein B by 16% occurred. HDL-cholesterol concentration increased significantly in both groups of hyperlipaemic patients during therapy. This may be the effect of both bezafibrate and colestipol. It is concluded that bile acid resins may effectively prevent the LDL-cholesterol concentration increase observed sometimes after clofibrate analogues. 相似文献
102.
The effect of proteases inhibitors, epsilon-amino-caproic acid and gordox, on reproduction of rotavirus SA-11 in MA-104 cells was studied by enzyme immunoassay. These inhibitors were shown to exert an inhibiting effect on rotavirus reproduction. 相似文献
103.
M Havel H Teufelsbauer P Kn?bl R Dalmatiner P Jaksch W Zw?lfer M Müller T Vukovich 《The Journal of thoracic and cardiovascular surgery》1991,101(6):968-972
To study the hemostyptic effect of aprotinin (Trasylol) in patients undergoing extracorporeal circulation for coronary artery bypass operations, we randomized 12 of 24 patients to receive aprotinin in high dosage (about 800 mg) during extracorporeal circulation. From the resulting two groups each, one patient was excluded from the study because of postoperative myocardial infarction (control group) and surgical hemorrhage (aprotinin group) leading to a second operation. Although heparin was used for anticoagulation in all 22 patients, all had a marked increase in plasma levels of thrombin-antithrombin III complexes during extracorporeal circulation, indicating an intravasal activation of coagulation. By monitoring the plasma levels of fibrin degradation products in patients without aprotinin therapy, we recorded a concomitant hyperfibrinolysis significantly less pronounced in patients receiving aprotinin (p less than 0.005). The mean total postoperative blood loss was lower in patients receiving aprotinin (620 ml) than in control patients (1000 ml; p less than 0.03). The results confirm previous reports of a hemostyptic effect of aprotinin in cardiac operations. This effect is probably due to a prevention of hyperfibrinolysis. 相似文献
104.
Thirty-five members of a family affected with von Hippel-Lindau's disease (VHL) were examined and lesions were found in nine of them. Four of the lesions were located in the central nervous system; two cerebellar, one spinal, one cerebral. Eye lesions were present in eight of the nine patients and complications developed in seven; six unilateral and one bilateral blindness. Both mortality and morbidity were found to be higher than in other series. This is attributed to insufficient screening of the patients with familial VHL, the late diagnosis was established only after the onset of complications. The importance of screening tests in VHL risk patients is emphasized. 相似文献
105.
106.
107.
Reported in this paper are postoperative results recorded from 120 patients, 3 years after selective proximal vagotomy for uncomplicated duodenal ulcer. There was no intraoperative lethality and no recurrence in 96.7 per cent of all cases, while Visick grades I on II were recorded from 98.2 per cent. Radiologically and gastroscopically detected pathological processes receded soon. Average postoperative reduction in acid secretion was 66.2 per cent in BAO and 46.8 per cent in MAO. Acid values re-increased thereafter, and three years later reduction rates still amounted to 43.7 per cent in BAO and 28.6 per cent in MAO. Indications for proximal gastric vagotomy are discussed in some detail. 相似文献
108.
109.
G Fran?ois C Mycinski L F Garnier B Charbonnier M Marchand L Guillou M Brochier 《Archives des maladies du coeur et des vaisseaux》1987,80(3):367-370
The authors report a case of massive haemolytic anaemia with acute mitral valve regurgitation and left cardiac failure, which occurred one year after surgical reconstruction of the mitral valve for rupture of smaller leaflet chordae. Anaemia, mitral regurgitation and cardiac failure disappeared after mitral valve replacement, using a Carpentier Edwards No. 29 valve. Haemolytic anaemia following mitral valve reconstruction is exceptional. It seems to be due to the suture material lying in a turbulent regurgitation stream when mitral incompetence develops again. 相似文献
110.
C. Sch?fer H. H. Klünemann B. Ibach J. Mueller A. Putzhammer I. Trender-Gerhard G. Schuierer H. E. Klein 《Der Nervenarzt》2002,24(1):879-882
Wir berichten über den ersten Fall von polyzystischer lipomembran?ser Osteodysplasie oder “brain, bone and fat disease” in
Deutschland. Die nach dem Erstbeschreibern auch als Morbus J?rvi-Hakola-Nasu bezeichnete Erkrankung ist bisher vor allem in
Japan und in Finnland beschrieben worden. Einzelne F?lle wurden aus Schweden, Norwegen, Italien, Südafrika, Belgien und den
USA berichtet. Im deutschsprachigen Raum ist bisher ein Fall aus ? ver?ffentlicht worden. 相似文献