【130103】❤EFY❤【阅读阅开心】No.102

发表于:2013-01-02 22:00 [只看楼主] [划词开启]



(左键刷蓝不会的单词-点击查词-即见单词的音标释义,回复者体会者另外奖励150沪元)
点击查看大图新年新气象~~~有没有新的计划呢?谈谈人生~~

Why does cream go bad faster than butter? Some researchers think they have the answer, and it comes down to the structure of the food, not its chemical composition—a finding that could help rid some processed foods of chemical preservatives.   
  Cream and butter contain pretty much the same substances, so why cream should sour much faster has been a mystery. Both are emulsions—tiny globules (小球体) of one liquid evenly distributed throughout another. The difference lies in what’s in the globules and what’s in the surrounding liquid, says Brocklehurst, who led the investigation.
  In cream, fatty globules drift about in a sea of water. In butter, globules of a watery solution are locked away in a sea of fat. The bacteria which make the food go bad prefer to live in the watery regions of the mixture. “This means that in cream, the bacteria are free to grow throughout the mixture,” he says.
  When the situation is reversed, the bacteria are locked away in compartments (隔仓室) buried deep in the sea of fat. Trapped in this way, individual colonies cannot spread and rapidly run out of nutrients (养料). They also slowly poison themselves with their waste products. “In butter, you get a self-limiting system which stops the bacteria growing,” says Brocklehurst.
  The researchers are already working with food companies keen to see if their products can be made resistant to bacterial attack through alterations to the food’s structure. Brocklehurst believes it will be possible to make the emulsions used in salad cream, for instance, more like that in butter. The key will be to do this while keeping the salad cream liquid and not turning it into a solid lump.

点击查看大图
点击查看大图OK,文章的大概意思都看懂了么?下面让我们做两道题来试试吧~




~O(∩_∩)O~, 订阅节目戳这里哦~~~

PS.往期节目还没做的亲,点我进入节目单,奖励照发哦~~~\(≧▽≦)/~~~


答题区

1、 The significance of Brocklehurst’s research is that ____________.
2、 The word “colonies” (Line 2, Para. 4) refers to __________.

本帖来源社刊

全部回复 (28) 回复 反向排序

  • 0

    点赞

  • 收藏

  • 扫一扫分享朋友圈

    二维码

  • 分享

课程推荐

需要先加入社团哦

编辑标签

最多可添加10个标签,不同标签用英文逗号分开

保存

编辑官方标签

最多可添加10个官方标签,不同标签用英文逗号分开

保存
知道了

复制到我的社团