全文获取类型
收费全文 | 393篇 |
免费 | 40篇 |
出版年
2021年 | 3篇 |
2020年 | 3篇 |
2018年 | 6篇 |
2017年 | 5篇 |
2016年 | 8篇 |
2015年 | 11篇 |
2014年 | 13篇 |
2013年 | 23篇 |
2012年 | 22篇 |
2011年 | 18篇 |
2010年 | 10篇 |
2009年 | 15篇 |
2008年 | 12篇 |
2007年 | 20篇 |
2006年 | 23篇 |
2005年 | 11篇 |
2004年 | 16篇 |
2003年 | 9篇 |
2002年 | 13篇 |
2001年 | 17篇 |
2000年 | 12篇 |
1999年 | 8篇 |
1997年 | 4篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1994年 | 3篇 |
1992年 | 7篇 |
1991年 | 8篇 |
1990年 | 5篇 |
1989年 | 4篇 |
1988年 | 5篇 |
1986年 | 8篇 |
1985年 | 5篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1981年 | 6篇 |
1977年 | 7篇 |
1976年 | 3篇 |
1973年 | 9篇 |
1972年 | 3篇 |
1970年 | 3篇 |
1969年 | 3篇 |
1968年 | 3篇 |
1967年 | 3篇 |
1965年 | 4篇 |
1961年 | 3篇 |
1950年 | 2篇 |
1941年 | 2篇 |
1908年 | 3篇 |
排序方式: 共有433条查询结果,搜索用时 171 毫秒
1.
2.
W. H. Wynn 《BMJ (Clinical research ed.)》1911,2(2648):775-776
3.
T E Wynn 《The Western journal of medicine》1979,130(5):467-468
4.
5.
Identification of the components of a putative cytochrome bc1 complex in Rhodopseudomonas viridis 总被引:1,自引:0,他引:1
Chromatophore membranes isolated from the bacteriochlorophyll b-containing, photosynthetic purple nonsulfur bacterium, Rhodopseudomonas viridis, have been shown to contain a Rieske iron-sulfur protein, a cytochrome similar to cytochrome c1, and also at least one b-type cytochrome. These observations suggest the presence of a previously undetected cytochrome bc1 complex in this bacterium. 相似文献
6.
7.
The effects of exercise training on glucose-stimulated insulin secretion (GSIS) were studied in male Sprague-Dawley rats made mildly to severely diabetic by partial pancreatectomy. Exercise trained (10 wk treadmill; T) and untrained (Unt) rats were grouped according to posttraining fed-state hyperglycemia as follows: T less than 200 and Unt less than 200 (glucose concn less than 200 mg/dl), T 200-300 and Unt 200-300 (glucose concn 200-300 mg/dl), and T greater than 300 and Unt greater than 300 (glucose concn greater than 300 mg/dl). After exercise training, hyperglycemic glucose clamps were performed in awake rats by elevation of arterial blood glucose concentration 126 mg/dl above fasting basal levels for 90 min. Exercise training significantly increased muscle citrate synthase activity. Prevailing hyperglycemia was reduced during the 10-wk exercise training period in all T rats with fed-state glucose concentrations less than 300, and only 53% of Unt rats in these groups had reduced glycemia. GSIS was significantly higher in T less than 200 [2.4 +/- 0.7 (SD) ng/ml at 90 min] than in Unt less than 200 (1.5 +/- 0.3). A similar response was found for T 200-300 (1.1 +/- 0.3 ng/dl) vs. Unt 200-300 (0.7 +/- 0.1) but not T greater than 300 (0.36 +/- 0.2) vs Unt greater than 300 (0.44 +/- 0.05). Sham-operated control rats had insulin concentrations of 6.6 +/- 1.6 ng/ml at the 90th min of the clamp. Acute exercise reduced fed-state glycemia in rats with mild-to-moderate (less than 300 mg/dl) diabetes.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
8.
9.
Malic enzyme was purified 43-fold from Mucor circinelloides. The enzyme was dependent on Mg2+ or Mn2+ for activity, was not active with Dmalate and had a pH optimum at 7.8. The apparent Km values for malate and NADP+ were 488 ΜM and 41 Μm respectively. The Mr of the native enzyme was 160 kDa. Five metabolic analogues of malate: oxaloacetate, tartronic acid, 1-methylenecyclopropane
trans-2,3-dicarboxyIic acid, malonic acid and glutaric acid, were found to inhibit malic enzyme activity at 10 mM. Four oleaginous
fungi, Mucor circinelloides, Mortierella alpina, Mortierella elongata and Pythium ultimum, were also examined, all possessed
a soluble malic enzyme, two also possessed a microsomal malic enzyme. 相似文献
10.