手机APP下载

您现在的位置: 首页 > 在线广播 > 科学美国人 > 科学美国人健康系列 > 正文

科学美国人60秒:巧克力过电可降低脂肪含量

来源:可可英语 编辑:aimee   可可英语APP下载 |  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..
Q)-MEoj71ibu;80cP

t)o.!^2st*#

This is Scientific American — 60-Second Science. I'm Christopher Intagliata.
Chocolate may appear to have little in common with crude oil. But production for consumers requires that both substances travel through pipes. And the thicker—that is, the more viscous—they are, the more likely they'll clog up those pipes. So physicists at Temple University in Philadelphia have devised an unusual solution to avoid that sticky situation: apply an electric field.
The process relies on a concept called electrorheology, in which a fluid can morph from a liquid to a JELL-O–like consistency, or the other way around, in an electric field. The field causes particles in the fluid, like paraffin and asphalt particles in crude oil, or cocoa and milk solids in chocolate, to act like tiny bar magnets, and line up into chains.

sK05xz*DvC

施加电场.jpg

s95EdbZ8V8OBJyXr%

And the team's latest finding could be a boon for the production of low-fat chocolate. Because cutting the fat content of chocolate tends to jam up the pipes—what you might call the Augustus Gloop effect.
But that blockage can be cleared by applying an electric field of 1600 volts per centimeter, parallel to the chocolate's flow. The effect would allow chocolatiers to cut cocoa butter by 10 to 20 percent and still not clog the pipes. The study appears in the Proceedings of the National Academy of Sciences.
The authors claim the resulting chocolate has a stronger cocoa flavor, and tastes quote, "wonderful." And since the study was funded in part by the Mars Chocolate company—and other chocolate makers are interested—the researchers say the tech may be commercialized within a year. At which point you can judge for yourself whether electric fields really make a better bar. Or if the taste is simply shocking.
Thanks for listening Scientific American — 60-Second Science Science. I'm Christopher Intagliata.

K18a-|Tp3z#Juh

4db,o)24(Ht5TLB#[

%K#dN#M[e]FH+K;#L)c6=L84%XPPm_eSF6U#k

重点单词   查看全部解释    
parallel ['pærəlel]

想一想再看

adj. 平行的,相同的,类似的,并联的
n.

联想记忆
solution [sə'lu:ʃən]

想一想再看

n. 解答,解决办法,溶解,溶液

联想记忆
academy [ə'kædəmi]

想一想再看

n. 学院,学术,学会

 
liquid ['likwid]

想一想再看

adj. 液体的,液态的
n. 液体

 
viscous ['viskəs]

想一想再看

adj. 粘的,粘性的

 
unusual [ʌn'ju:ʒuəl]

想一想再看

adj. 不平常的,异常的

联想记忆
blockage ['blɔkidʒ]

想一想再看

n. 封锁,妨碍

 
concept ['kɔnsept]

想一想再看

n. 概念,观念

 
acting ['æktiŋ]

想一想再看

n. 演戏,行为,假装 adj. 代理的,临时的,供演出

 
avoid [ə'vɔid]

想一想再看

vt. 避免,逃避

联想记忆

发布评论我来说2句

    最新文章

    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。