全文获取类型
收费全文 | 679篇 |
免费 | 43篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 52篇 |
妇产科学 | 15篇 |
基础医学 | 96篇 |
口腔科学 | 12篇 |
临床医学 | 64篇 |
内科学 | 131篇 |
皮肤病学 | 28篇 |
神经病学 | 19篇 |
特种医学 | 88篇 |
外科学 | 102篇 |
综合类 | 21篇 |
预防医学 | 29篇 |
眼科学 | 7篇 |
药学 | 37篇 |
中国医学 | 1篇 |
肿瘤学 | 18篇 |
出版年
2018年 | 4篇 |
2017年 | 7篇 |
2016年 | 7篇 |
2015年 | 7篇 |
2014年 | 14篇 |
2013年 | 24篇 |
2012年 | 4篇 |
2011年 | 7篇 |
2010年 | 24篇 |
2009年 | 26篇 |
2008年 | 18篇 |
2007年 | 14篇 |
2006年 | 16篇 |
2005年 | 18篇 |
2004年 | 11篇 |
2003年 | 15篇 |
2002年 | 16篇 |
2001年 | 9篇 |
2000年 | 3篇 |
1999年 | 11篇 |
1998年 | 20篇 |
1997年 | 42篇 |
1996年 | 31篇 |
1995年 | 21篇 |
1994年 | 23篇 |
1993年 | 21篇 |
1992年 | 14篇 |
1991年 | 16篇 |
1990年 | 23篇 |
1989年 | 36篇 |
1988年 | 21篇 |
1987年 | 20篇 |
1986年 | 23篇 |
1985年 | 17篇 |
1984年 | 13篇 |
1983年 | 4篇 |
1981年 | 5篇 |
1980年 | 8篇 |
1979年 | 8篇 |
1978年 | 8篇 |
1977年 | 10篇 |
1976年 | 10篇 |
1975年 | 11篇 |
1974年 | 7篇 |
1972年 | 6篇 |
1971年 | 8篇 |
1970年 | 3篇 |
1969年 | 6篇 |
1968年 | 5篇 |
1957年 | 3篇 |
排序方式: 共有722条查询结果,搜索用时 15 毫秒
31.
SE Daley AD Pearson AW Craft J Kernahan RA Wyllie L Price C Brock C Hetherington D Halliday K Bartlett 《Archives of disease in childhood》1996,75(4):273-281
Whole body protein synthesis and catabolism were measured using the [ring-2H5]phenylalanine and [1-13C]leucine primed constant infusion technique in 32 paediatric patients with cancer at different stages of treatment. Rates of synthesis (S) and catabolism (C) derived from the [ring-2H5]phenylalanine and [1-13C]leucine models were 4.7 (SD 1.3) (S) and 6.0 (1.5) (C) g/d/kg, and 5.5 (0.8) (S) and 6.8 (1.2) (C) g/d/kg, respectively. These results show that these two tracer techniques give similar results in this study population. Comparison of these values with results previously reported for groups of control children using the [ring-2H5]phenylalanine model (S = 3.69 and 3.93; C = 4.09 and 4.28 g/d/kg) and the [1-13C]leucine model (S = 4.32; C = 4.85 g/d/kg) show that rates of synthesis and catabolism were higher in cancer patients than in controls. Thus whole body protein turnover is increased in children under treatment for cancer. Other indices of metabolism such as plasma amino acids and intermediary metabolites were also measured and showed that, although subjects were in isotopic steady state, there were significant metabolic changes during the course of the primed constant infusions used to measure protein turnover. 相似文献
32.
33.
34.
Between June 1986 and April 1988, 86 sonographic examinations of the shoulder were performed on patients suspected of having rotator cuff tears. Major sonographic diagnostic criteria included (a) a well-defined discontinuity usually visible as a hypoechoic focus within the cuff, (b) nonvisualization of the cuff and (c) an echogenic focus within the cuff. Seventy-five patients underwent both sonography and arthrography. Compared with arthrography alone, ultrasound examinations enabled detection of 92% of rotator cuff tears (24 of 26 tears), with a specificity of 84% and a negative predictive value of 95%. Correlation was obtained in 30 of these patients who underwent surgery for rotator cuff tear or other soft-tissue abnormality. In this group, the sensitivity of sonography for detection of a tear was 93%, with a specificity of 73%, while for arthrography sensitivity was 87% and specificity was 100%. These data indicate that sonography is a useful, noninvasive screening procedure for patients suspected of having rotator cuff injury. 相似文献
35.
36.
37.
38.
39.
40.