手机APP下载

您现在的位置: 首页 > 在线广播 > 科学美国人 > 科学美国人科学系列 > 正文

科学美国人60秒:游戏玩家能助力毒素研究

来源:可可英语 编辑:aimee   VIP免费外教试听课 |  可可官方微信:ikekenet
 下载MP3到电脑  批量下载MP3和LRC到手机
加载中..
W2X[O6RayS

Yp3gBNb_e=nS[1lyw@,

This is Scientific American — 60-Second Science. I'm Steve Mirsky.
Aflatoxins. They're produced by funguses that infect crops. And they can cause liver cancer, immune damage and other health problems. Rare outbreaks related to peanuts or corn happen in the U.S. But aflatoxins are a big problem in the developing world.
"Pretty much every study that's out there shows that the vast majority of the food system is contaminated with aflatoxin, ranging from a few-fold to thousands of fold above the legal limit in the United States." Justin Siegel, a biochemist at U.C. Davis.
He's part of a team "an exciting set of uncommon collaborators with Mars Incorporated, Thermo-Fisher and a bunch of great universities" that wants to try to create an enzyme to attack aflatoxins at a vulnerable point—a part of their molecular structure known as a lactone ring. "So it's been shown in studies a long time ago that breaking this lactone ring decreases toxicity by several orders of magnitude. So it should render the molecule non-toxic at that point."
Some soil microbes make compounds that can bust apart lactone rings. "They naturally break down lactones. They just can't do this specific lactone. They can't break down aflatoxin."

JteYlQxP8;nUn.5!&SK

在线蛋白质折迭游戏.jpg
So Siegel hopes that an enzyme that has the ability to attack lactones can be modified so that it works on aflatoxins. And maybe you can help—by playing Foldit.
"Foldit is a massively multiplayer online game that was developed at the University of Washington...it's a game that puts proteins online and allows users to manipulate the structures of these proteins like, you can almost think of it like a three-dimensional Tetris...players are really driven by a goal to get a good score. But that score is driven by actually a physical reality of how stable this protein is."
The game goes live today.
"The game stays live for two to three weeks and anyone who wants to play it can play it, they just go to Fold.It and they can access it...and we collect the solutions and the shapes and the structures that these players create, and it's really a creative process...and once we have those, because of the technology that Thermo Fisher is bringing to the table, they're gonna synthesize hundreds if not thousands of genes that correspond to the players' designs and that'll be done within just a few weeks. So from the first time the puzzle's posted to when we're expecting the first results is on the order of two to three months. And there might be a solution for the problem."
Thanks for listening for Scientific American — 60-Second Science. I'm Steve Mirsky.

Q|Lne&Dr^wGaxKvX&fGG

4SB9Kp8!&Bl.Lh

JHS!F.kE&Q7Qy@LN|k=~lm=PB;d(7sm|;#^AK!g

重点单词   查看全部解释    
vulnerable ['vʌlnərəbl]

想一想再看

adj. 易受伤害的,有弱点的

联想记忆
synthesize ['sinθisaiz]

想一想再看

v. 合成

 
solution [sə'lu:ʃən]

想一想再看

n. 解答,解决办法,溶解,溶液

联想记忆
manipulate [mə'nipjuleit]

想一想再看

vt. 操纵,操作,控制,利用,(巧妙地)处理,篡改

联想记忆
puzzle ['pʌzl]

想一想再看

n. 谜,难题,迷惑
vt. 使困惑,使为难<

 
infect [in'fekt]

想一想再看

vt. 传染,感染

联想记忆
specific [spi'sifik]

想一想再看

adj. 特殊的,明确的,具有特效的
n. 特

联想记忆
score [skɔ:]

想一想再看

n. 得分,刻痕,二十,乐谱
vt. 记分,刻

联想记忆
corn [kɔ:n]

想一想再看

n. 谷物,小麦,玉米
v. 形成(颗粒状),

 
rare [rɛə]

想一想再看

adj. 稀罕的,稀薄的,罕见的,珍贵的
ad

 
发布评论我来说2句

    英语学习推荐

    • 英语听写训练
      听写强化训练系统有听写比对,按句停顿,中文翻译、听写错词提示等特色功能.
    • 可可英语微信:ikekenet
      关注可可英语官方微信,每天将会向大家推送短小精悍的英语学习资料..

    科学美国人60秒

    可可英语官方微信(微信号:ikekenet)

    每天向大家推送短小精悍的英语学习资料.

    添加方式1.扫描上方可可官方微信二维码。
    添加方式2.搜索微信号ikekenet添加即可。