白藜芦醇可使蜜蜂食量下降
文章来源:未知 文章作者:enread 发布时间:2012-09-25 06:48 字体: [ ]  进入论坛
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The idea that drinking red wine may provide health benefits -- or possibly even extend your life -- is an appealing(吸引人的) thought for many people. Now, there may be added attraction. Researchers have found that when given resveratrol(白藜芦醇), a compound found in red wine, bees consume less food. Previous scientific studies on resveratrol show that it lengthens1 the lifespan of diverse organisms ranging from unicellular(单细胞的) yeast2 to fruit flies and mice. Since bees are social animals like humans, a team of scientists from Arizona State University, the Norwegian University of Life Sciences, and Harvard Medical School, decided3 to test the effects of the chemical on the honey bee.
 
In a series of experiments published in the journal Aging, the scientists tested the effects of resveratrol on the lifespan, learning ability, and food perception in honey bees.
 
Their research has confirmed that not only does this compound extend the lifespan of honey bees by 33 to 38 percent, it also changes the decisions that bees make about food by triggering a "moderation effect" when they eat.
 
"For the first time, we conducted several tests on the effects of resveratrol by using the honey bee as a model," said Brenda Rascón, an ASU alumnus and doctoral student with Gro Amdam, an associate professor in ASU's School of Life Sciences and the Norwegian University of Life Sciences. "We were able to confirm that under normal living conditions, resveratrol lengthened4 lifespan in honey bees."
 
Since resveratrol is an antioxidant, researchers also questioned whether it would be capable of diminishing the damaging effects of "free radicals5" -- often released during stressful conditions. Free radicals are believed to cause damage to cells, and have an effect on how we age. Resveratrol did not, however, prove to extend lives of bees living under stressful conditions.
 
Yet, since the bees tested with the compound were living longer, researchers asked the next question: What's happening that is causing them to live longer?
 
"Because what we eat is such an important contributor to our physical health, we looked at the bees' sensitivity to sugar and their willingness to consume it," said Amdam. "Bees typically gorge6 on(贪婪地吃) sugar and while it's the best thing for them, we know that eating too much is not necessarily a good thing."


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1 lengthens 75eae5d6012f7f4a143f3caa103ace4d     
(时间或空间)延长,伸长( lengthen的第三人称单数 )
参考例句:
  • In summer, the daylight hour lengthens. 夏天,白天的时间长。
  • Summer lengthens (out) into autumn. 夏去秋来。
2 yeast 7VIzu     
n.酵母;酵母片;泡沫;v.发酵;起泡沫
参考例句:
  • Yeast can be used in making beer and bread.酵母可用于酿啤酒和发面包。
  • The yeast began to work.酵母开始发酵。
3 decided lvqzZd     
adj.决定了的,坚决的;明显的,明确的
参考例句:
  • This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
  • There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。
4 lengthened 4c0dbc9eb35481502947898d5e9f0a54     
(时间或空间)延长,伸长( lengthen的过去式和过去分词 )
参考例句:
  • The afternoon shadows lengthened. 下午影子渐渐变长了。
  • He wanted to have his coat lengthened a bit. 他要把上衣放长一些。
5 radicals 5c853925d2a610c29b107b916c89076e     
n.激进分子( radical的名词复数 );根基;基本原理;[数学]根数
参考例句:
  • Some militant leaders want to merge with white radicals. 一些好斗的领导人要和白人中的激进派联合。 来自《简明英汉词典》
  • The worry is that the radicals will grow more intransigent. 现在人们担忧激进分子会变得更加不妥协。 来自辞典例句
6 gorge Zf1xm     
n.咽喉,胃,暴食,山峡;v.塞饱,狼吞虎咽地吃
参考例句:
  • East of the gorge leveled out.峡谷东面地势变得平坦起来。
  • It made my gorge rise to hear the news.这消息令我作呕。
TAG标签: food wine bees
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