官方APP下载:英语全能特训(微信小程序版,支持苹果手机、安卓手机)
创办于2003年
UNSV记不住?那就记中文谐音“忧安思危”吧!
  Slow and Steady Wins the Race!
UNSV英语学习频道 - Slow and steady wins the race!

英语全能特训(微信小程序)
UNSV英语学习频道淘宝网店
客服短信:18913948480
客服邮箱:web@unsv.com
初级VIP会员
全站英语学习资料下载。
¥98元/12个月

HEALTH REPORT - Anti-Aging Research

阅读次数:


VIP会员专享下载:(非VIP会员无权下载!如果想下载,但还不是VIP会员,请点此订购
下载方式:使用鼠标右键(注意是鼠标右键!)点击下面的MP3音频/MP4视频链接,然后选择“另存为…”。
PDF节目文稿 PDF节目文稿  MP3节目录音 MP3节目录音 
文章正文
同步字幕

This is the VOA Special English Health Report.

For many years, researchers have been studying ways to extend life and to improve health as people get older.

They know that laboratory rats and other creatures live longer if they are fed a diet with fewer calories than normal. Scientists have found that enzymes called sirtuins (sir-TOO-ins) help cells repair damage and survive longer.

David Sinclair of Harvard University calls sirtuins "guardians of the cell." Mister Sinclair has been looking for ways to strengthen this protection. He and his research team mixed some of the sirtuins with different molecules to test the effects. The molecule that reacted the most was resveratrol.

Graphic Image
Graphic Image

Researchers at Harvard Medical School in Massachusetts say this natural chemical lengthened the life of yeast cells. The researchers reported their findings this month in the publication Nature.

One of the places resveratrol is found is in the skin of grapes. So, it is in wine. Red wine contains more of it than white wine.

The Harvard researchers placed different amounts of resveretrol into dishes of yeast. They discovered that the smallest amount of the chemical appeared to have the greatest effect. They found that the yeast cells divided seventy percent more than normal.

The researchers also exposed human cells to dangerous radiation. They found that the cells treated with resveratrol lived longer than those not treated.

Tests have also been done on fruit flies and worms. The researchers say the chemical appears to have a similar effect. Fruit flies and worms have a lot in common with human biology. Studies are also planned on mice and monkeys.

The researchers say they would like to extend human life by several years. They also want to make those last years of life healthier than they are now.

Mister Sinclair says he drinks a glass of red wine a day. Studies have shown that wine can be good for the heart. But the scientist adds that the resveratrol is lost in the air within a day of opening a wine bottle. Also, large amounts of alcohol can cause liver damage, weight gain and other problems.

Some experts like the idea of a drug that would copy the effects of a reduced-calorie diet as a way to extend life. But any drugs based on resveratol are years away.

This VOA Special English Health Report was written by Nancy Steinbach.

网友的学习评论(0条):
版权所有©2003-2019 南京通享科技有限公司,保留所有权利。未经书面许可,严禁转载本站内容,违者追究法律责任。 互联网经营ICP证:苏B2-20120186
网站备案:苏ICP备05000269号-1中国工业和信息化部网站备案查询
广播台