全文获取类型
收费全文 | 1051篇 |
免费 | 84篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 13篇 |
儿科学 | 32篇 |
妇产科学 | 16篇 |
基础医学 | 98篇 |
口腔科学 | 199篇 |
临床医学 | 104篇 |
内科学 | 184篇 |
皮肤病学 | 23篇 |
神经病学 | 34篇 |
特种医学 | 99篇 |
外科学 | 101篇 |
综合类 | 23篇 |
预防医学 | 114篇 |
眼科学 | 9篇 |
药学 | 24篇 |
中国医学 | 1篇 |
肿瘤学 | 67篇 |
出版年
2023年 | 11篇 |
2022年 | 10篇 |
2021年 | 21篇 |
2020年 | 18篇 |
2019年 | 18篇 |
2018年 | 27篇 |
2017年 | 34篇 |
2016年 | 28篇 |
2015年 | 41篇 |
2014年 | 51篇 |
2013年 | 63篇 |
2012年 | 43篇 |
2011年 | 60篇 |
2010年 | 55篇 |
2009年 | 31篇 |
2008年 | 49篇 |
2007年 | 53篇 |
2006年 | 38篇 |
2005年 | 29篇 |
2004年 | 33篇 |
2003年 | 23篇 |
2002年 | 23篇 |
2001年 | 27篇 |
2000年 | 17篇 |
1999年 | 22篇 |
1998年 | 29篇 |
1997年 | 35篇 |
1996年 | 30篇 |
1995年 | 18篇 |
1994年 | 19篇 |
1993年 | 13篇 |
1992年 | 11篇 |
1991年 | 7篇 |
1990年 | 9篇 |
1989年 | 11篇 |
1988年 | 8篇 |
1987年 | 8篇 |
1986年 | 9篇 |
1985年 | 12篇 |
1984年 | 9篇 |
1983年 | 6篇 |
1982年 | 14篇 |
1981年 | 8篇 |
1980年 | 11篇 |
1979年 | 6篇 |
1978年 | 7篇 |
1977年 | 8篇 |
1976年 | 7篇 |
1975年 | 6篇 |
1973年 | 4篇 |
排序方式: 共有1141条查询结果,搜索用时 15 毫秒
91.
92.
93.
Mild hypothermia during halothane-induced anesthesia decreases resistance to Staphylococcus aureus dermal infection in guinea pigs 总被引:1,自引:0,他引:1
Clark W. Sheffield MD ; Daniel I. Sessler MD ; Thomas K. Hunt MD ; Heinz Scheuenstuhl AB 《Wound repair and regeneration》1994,2(1):48-56
Because various immune functions are impaired at temperatures only 1 degrees to 3 degrees C less than normal, we tested the hypothesis that mild hypothermia during anesthesia impairs resistance to dermal infections. Guinea pigs were anesthetized for 6 hours with 1% inspired halothane. Their core temperatures were maintained at either 39 degrees C (normal for guinea pigs, n = 12) or 36 degrees C (n = 12). Two hours after induction of anesthesia, three doses each of Staphylococcus aureus (10(8), 10(7), and 10(6) organisms) were injected intradermally at nine sites on each animal's back. Core temperatures were not controlled after recovery from the anesthetic, and animals in each group were maintained in the same environment. Four days after anesthesia, each injection site was excised to obtain a count of viable bacteria. Subcutaneous oxygen partial pressure values, averaged over time, were 53 +/- 3 mm Hg (mean +/- SEM) in the hypothermic group and 62 +/- 4 mm Hg in the normothermic group (p = 0.06). Capillary perfusion, as assessed by laser Doppler flowmetry, was comparable in the two groups. One day after injection of 10(8) bacteria, the area of induration was 89 +/- 11 mm(2) in the hypothermic group but only 61 +/- 6 mm(2) in the normothermic group (p < 0.05). On postanesthetic day 4, the area of induration was 72 +/- 6 and 59 +/- 6 mm(2) in the hypothermic and normothermic groups, respectively (p > 0.05). After inoculation with 10(8) bacteria, the fraction recovered was 1.0 +/- 0.2 in the hypothermic groups and 0.6 +/- 0.2 in the normothermic group (p < 0.05). After inoculation with 10(7) and 10(6) bacteria, the fraction recovered was less than 0.2, and no difference was found between the hypothermic and normothermic animals. Thus mild hypothermia during halothane-induced anesthesia slightly impairs resistance to dermal infection. 相似文献
94.
Arthrograms of the temporomandibular joint were obtained in 20 symptomatic joints that had previous reconstructive arthroplasty with disk repositioning because of internal derangements. Preoperative arthrograms were available for comparison in 18 joints. Symptoms resulting in a postoperative arthrogram included pain, limited ability to open the mouth, and clicking of the joints. Postoperative arthrographic findings included limited anterior translation of the condyle (90%), irregularity in outline of the intraarticular contrast agent (60%), a conical configuration of the posterior recess (25%), decreased size of the joint (28%), anterior displacement of the meniscus (25%), and perforated meniscus (15%). Many of these findings may have resulted from fibrosis and scarring, which may be a response to intraarticular bleeding. The mechanism by which the fibrosis causes the postsurgical arthrographic features is discussed. 相似文献
95.
Laura MC Welschen Patricia van Oppen Jacqueline M Dekker Lex M Bouter Wim AB Stalman Giel Nijpels 《BMC public health》2007,7(1):74
Background
In patients with type 2 diabetes, the risk for cardiovascular disease is substantial. To achieve a more favourable risk profile, lifestyle changes on diet, physical activity and smoking status are needed. This will involve changes in behaviour, which is difficult to achieve. Cognitive behavioural therapies focussing on self-management have been shown to be effective. We have developed an intervention combining techniques of Motivational Interviewing (MI) and Problem Solving Treatment (PST). The aim of our study is to investigate if adding a combined behavioural intervention to managed care, is effective in achieving changes in lifestyle and cardiovascular risk profile. 相似文献96.
97.
98.
99.
MRMdaSA Rafael† CMBM Fernandes† JMdaC Machado‡ PAPA Rodrigues‡ OJP Cardoso‡ A Afonso§ AB Sousa¶ FMDdeA Pacheco† RM Proença ‡ 《Journal of the European Academy of Dermatology and Venereology》2003,17(4):449-451
We report a case of atypical bullous pyoderma gangrenosum associated with acute myeloid leukaemia in which we found atypical myeloid cells within the skin lesion. Although there have been many reported cases of leukaemia-associated pyoderma gangrenosum, the finding of myeloblasts in the skin has rarely been described. 相似文献
100.
Warren R. Stanton PhD Jane L. Kelly AB Deborah A. Bunyan MSc Phil A. Silva PhD 《The Australian & New Zealand journal of obstetrics & gynaecology》1992,32(4):338-340
Fertility is dependent on sexual maturity, which is associated with a number of factors, including body mass. In this study the Body Mass Index (BMI) was used to estimate body fat in a large sample of 13-year-old New Zealand girls. Nearly half of the subjects (46%) had experienced the menarche. Expected gain in body mass was calculated from growth rates at earlier ages and used to examine whether deviation from the expected gain was associated with the onset of the menarche. In general, the results show an association between the menarche and gain in body mass. However, many girls who failed to achieve their expected gain had experienced the menarche (18%), indicating that the relationship between body weight and the menarche may not be causal or is mediated by other factors. 相似文献