全文获取类型
| 收费全文 | 1894篇 |
| 免费 | 28篇 |
| 国内免费 | 2篇 |
专业分类
| 教育 | 1353篇 |
| 科学研究 | 194篇 |
| 各国文化 | 35篇 |
| 体育 | 117篇 |
| 综合类 | 1篇 |
| 文化理论 | 24篇 |
| 信息传播 | 200篇 |
出版年
| 2023年 | 15篇 |
| 2022年 | 10篇 |
| 2021年 | 26篇 |
| 2020年 | 39篇 |
| 2019年 | 55篇 |
| 2018年 | 51篇 |
| 2017年 | 79篇 |
| 2016年 | 69篇 |
| 2015年 | 41篇 |
| 2014年 | 41篇 |
| 2013年 | 440篇 |
| 2012年 | 32篇 |
| 2011年 | 37篇 |
| 2010年 | 39篇 |
| 2009年 | 47篇 |
| 2008年 | 57篇 |
| 2007年 | 24篇 |
| 2006年 | 38篇 |
| 2005年 | 35篇 |
| 2004年 | 34篇 |
| 2003年 | 27篇 |
| 2002年 | 28篇 |
| 2001年 | 33篇 |
| 2000年 | 26篇 |
| 1999年 | 20篇 |
| 1998年 | 19篇 |
| 1997年 | 11篇 |
| 1996年 | 18篇 |
| 1995年 | 21篇 |
| 1994年 | 23篇 |
| 1993年 | 13篇 |
| 1992年 | 16篇 |
| 1991年 | 17篇 |
| 1990年 | 28篇 |
| 1989年 | 16篇 |
| 1988年 | 13篇 |
| 1987年 | 14篇 |
| 1986年 | 16篇 |
| 1985年 | 21篇 |
| 1984年 | 12篇 |
| 1981年 | 19篇 |
| 1979年 | 13篇 |
| 1978年 | 9篇 |
| 1977年 | 13篇 |
| 1976年 | 15篇 |
| 1975年 | 9篇 |
| 1974年 | 10篇 |
| 1972年 | 11篇 |
| 1968年 | 9篇 |
| 1923年 | 10篇 |
排序方式： 共有1924条查询结果，搜索用时 93 毫秒
51.
Effects of vanadate supplementation on high fat-diet and diabetes-induced metabolic changes in liver
Subbiah Pugazhenthi Joseph F. Angel Ramji L. Khandelwal 《Indian journal of clinical biochemistry : IJCB》1996,11(2):108-114
Normal and streptozotocin-induced diabetic rats were fed the control high starch-diet or a high fatdiet supplemented with or without sodium orthovanadate (1.5 mg/g diet) for six weeks. Plasma glucose, insulin and triacylglycerol levels and the activities of hepatic glycogen synthase, phosphorylase, glucose-6-phosphate dehydrogenase, malic enzyme, and ATP-citrate lyase were measured in these eight groups of rats. The high fat-diet increased the levels of insulin (P<0.05) and triacylglycerol (P<0.01) in plasma and decreased the activities (P<0.001) of phosphorylase (active from and total) and the lipogenic enzymes. Vanadate supplementation led to significant (P<0.001) decreases in the elevated insulin and triacylglycerol levels whereas the enzyme activities remained unaffected. Diabetes and fat diet in combination caused 3.7-fold increases in plasma glucose and triacylglycerol levels and vanadate decreased them by 58% and 74% respectively. Vanadate improved the activities of hepatic glycogen metabolizing and lipogenic enzymes in diabetic rats when they were fed on control starch-diet but not with high fat-diet. This study shows that vanadate normalizes hyperinsulinemia and hypertriglyceridemia but not the defective hepatic glycogen metabolism in high fat-fed rats. 相似文献
52.
R Abraham M Joseph John R Calton J Dhanoa 《Indian journal of clinical biochemistry : IJCB》2006,21(1):95-100
Homocysteine(Hcy) has been implicated as a novel risk factor of Coronary Artery Disease (CAD) among Asian Indians, but many
studies done in India failed to reveal any direct correlation. It has also been reported that Folic acid and Vitamin B12 levels
inversely affect serum levels of homocysteine. In this study, we looked at the levels of homocysteine among patients with
CAD. The effect of Vitamin B12, Folate and other risk factors on homocysteine levels were also evaluated. Mean homocysteine
levels in cases (22.81±13.9, n=70) were significantly higher (p=<0.001) than the controls (7.77±7.3, n=70). However no statistically
significant correlation could be deduced between homocysteine Vitamin B12, and Folate. Cumulative analysis have indicated
an increase in homocysteine levels among patients with CAD with every additional risk factor. 相似文献
53.
Joseph C. English 《College Teaching》2013,61(2):157-158
54.
55.
57.
58.
Joseph Kaminetsky 《Journal of Jewish Education》2013,79(3):197-199
59.
60.