全文获取类型
收费全文 | 702篇 |
免费 | 35篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 41篇 |
妇产科学 | 3篇 |
基础医学 | 81篇 |
口腔科学 | 18篇 |
临床医学 | 95篇 |
内科学 | 140篇 |
皮肤病学 | 13篇 |
神经病学 | 31篇 |
特种医学 | 85篇 |
外科学 | 80篇 |
综合类 | 66篇 |
预防医学 | 34篇 |
眼科学 | 8篇 |
药学 | 25篇 |
肿瘤学 | 23篇 |
出版年
2022年 | 5篇 |
2021年 | 6篇 |
2020年 | 6篇 |
2018年 | 7篇 |
2017年 | 5篇 |
2016年 | 9篇 |
2015年 | 16篇 |
2014年 | 15篇 |
2013年 | 18篇 |
2012年 | 10篇 |
2011年 | 10篇 |
2010年 | 20篇 |
2009年 | 32篇 |
2008年 | 11篇 |
2007年 | 26篇 |
2006年 | 38篇 |
2005年 | 9篇 |
2004年 | 13篇 |
2003年 | 9篇 |
2002年 | 13篇 |
2001年 | 18篇 |
2000年 | 8篇 |
1999年 | 21篇 |
1998年 | 43篇 |
1997年 | 33篇 |
1996年 | 41篇 |
1995年 | 18篇 |
1994年 | 21篇 |
1993年 | 22篇 |
1992年 | 10篇 |
1991年 | 11篇 |
1990年 | 8篇 |
1989年 | 22篇 |
1988年 | 35篇 |
1987年 | 19篇 |
1986年 | 9篇 |
1985年 | 25篇 |
1984年 | 13篇 |
1983年 | 9篇 |
1982年 | 5篇 |
1981年 | 5篇 |
1980年 | 4篇 |
1979年 | 7篇 |
1977年 | 4篇 |
1976年 | 13篇 |
1975年 | 5篇 |
1974年 | 6篇 |
1973年 | 3篇 |
1972年 | 4篇 |
1971年 | 6篇 |
排序方式: 共有744条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
D Rudy D A Sica T Comstock J Davis J Savory A C Schoolwerth 《The International journal of artificial organs》1991,14(10):625-629
The influence of a sodium citrate/citric acid mixture on the gastrointestinal (GI) absorption of aluminum (Al) from an Al(OH)3 preparation was evaluated in six stable maintenance hemodialysis patients. Plasma Al concentrations were determined serially after each of the following treatment sequences (I) Al(OH)3; (II) Al(OH)3 + sodium citrate/citric acid; (III) sodium citrate/citric acid; (IV) Al(OH)3 + NaHCO3. AUC0-8 for plasma Al from 0 to 8 hours was significantly greater (p less than 0.05) for Al(OH)3 + sodium citrate/citric acid (73 +/- 23 micrograms.hr/l; mean +/- SEM) than Al(OH)3 (16 +/- 30 micrograms.hr/l); sodium citrate/citric acid (-27 +/- 14 micrograms.hr/l); or Al(OH)3 + NaHCO3 (6 +/- 22 micrograms.hr/l). The 24 hour Al level remained above baseline (p less than 0.03) following Al(OH)3 + sodium citrate/citric acid (31 +/- 12 (pre) vs 54 +/- 14 micrograms/l (post), in contradistinction to study limb: l (34 +/- 14 vs 30 +/- 12 micrograms/l); III (79 +/- 40 vs 65 +/- 35 micrograms/l); and IV (71 +/- 37 vs 66 +/- 42 micrograms/l). We conclude that the GI absorption of Al from Al(OH)3 is enhanced by citrate in patients undergoing hemodialysis and that elevations of plasma Al persist longer. The concomitant administration of citrate and Al-containing phosphate (PO4) binders should be avoided in patients with end-stage renal disease (ESRD). NaHCO3 may serve as an alternative therapy for metabolic acidosis with less risk of enhancing Al absorption. 相似文献
5.
C J Savory 《The British journal of nutrition》1992,67(1):77-89
To test a possible influence of dietary fibre on intestinal sugar uptake, rates of absorption of 10 mM-D-[U-14C] glucose and 10 mM-D-[U-14C] xylose were measured in either jejunum or (distal) caecum, by in vivo lumen perfusion, in immature female fowls preconditioned to a standard diet containing (g/kg) either 0, 100, 200 or 400 added dried grass, 200 powdered cellulose, or 200 grass with a polysaccharidase enzyme supplement. When birds were killed after perfusion, dimensions of (unperfused) parts of their alimentary tracts were determined, and recoveries of 14C radioactivity in some body tissues were compared with measured activities absorbed. On average, absorption of glucose was 1.9 and 1.2 times faster than xylose in jejunum and caecum respectively, although these differences varied with dietary treatment and order of perfusion. Increasing grass in the diet caused significant changes in xylose absorption rate in both jejunum and caecum, but only when it was perfused before glucose. With any one sugar and intestinal segment, mean rates of absorption were correlated positively with corresponding mean rates of fluid loss from perfusate. Although their influence on sugar absorption was not well defined, the dietary fibre treatments had more pronounced effects on gross dimensions of parts of the alimentary tract and, hence, potentially on total rates of absorption. Compared with the basal diet, addition of 100, 200 or 400 g grass/kg or 200 g cellulose/kg caused significant increases in small intestine length while 200 g grass/kg with supplementary enzyme did not, and combined caecal length increased with the 400 g grass/kg and the supplementary enzyme treatments. Absorbed 14C activity was recovered in plasma after jejunal perfusions but not caecal ones, whereas it was recovered in liver and in the flushed perfused segment after both types of perfusion. Since there was overlap in absorption rates between jejunum and caecum, this result suggests that the liver may be able to distinguish and treat differently compounds absorbed in the two regions. 相似文献
6.
Mark Foord BA MA Julie Savory BA MA MCiH Dianne Sodhi BA MA MCiH 《Health & social care in the community》2004,12(2):126-133
This paper reflects on a research project funded by a consortium of leading sheltered housing (SH) providers and their regulatory body, the Housing Corporation. The project aimed to ascertain which aspects of SH older people perceived to be central to their satisfaction and the methods they judged most appropriate to measuring this. We outline key policy developments of importance to SH (specifically the development of performance measurement regimes), and changes in the nature of SH, which are driving providers to re‐evaluate how they measure user satisfaction. We discuss the aims of the project, our methodology and findings, and conclude by raising critical questions about the process of measuring satisfaction within an increasingly managerialised housing system. We argue that this favours standardised methods of information gathering (such as questionnaires) rather than engage with clients in order to develop methods and systems capable of eliciting qualitative issues of concern to them. Our conclusions are, we believe, applicable to health and social care provision, where similar tensions exist around performance measurement and user satisfaction. 相似文献
7.
8.
9.
10.