首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Why does cream go bad faster than butter? Some researchers think that it comes down to the structure of the food, not its chemic
Why does cream go bad faster than butter? Some researchers think that it comes down to the structure of the food, not its chemic
admin
2015-02-09
72
问题
Why does cream go bad faster than butter? Some researchers think that 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 much【B1】______, so why cream should sour much faster has been a 【B2】______. Both are emulsions — tiny globules of one liquid evenly【B3】______throughout another. The difference lies in what’s in the globules and what’s in the surrounding. In cream, fatty globules 【B4】______ in a sea of water. In butter, globules of a watery【B5】______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【B6】______. This means that in cream, the bacteria are free to grow throughout the mixture. When the situation is 【B7】______, the bacteria are locked away in【B8】______buried deep in the sea of fat. Trapped in this way,【B9】______colonies cannot spread and rapidly run out of nutrients. They also slowly poison themselves with their waste products.
In butter, there is a self-limiting system which stops the bacteria growing. The researchers are already working with food companies keen to see if their products can be made【B10】______bacterial attack through alterations to the food’s structure. They believe that 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.
【B4】
Why does cream go bad faster than butter? Some researchers think that 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 much(26)the same substances, so why cream should sour much faster has been a(27)mystery. Both are emulsions — tiny globules of one liquid evenly(28)distributed throughout another. The difference lies in what’s in the globules and what’s in the surrounding. In cream, fatty globules(29)drift about in a sea of water. In butter, globules of a watery(30)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(31)mixture. This means that in cream, the bacteria are free to grow throughout the mixture. When the situation is(32)reversed, the bacteria are locked away in(33)compart-ments buried deep in the sea of fat. Trapped in this way,(34)individual colonies cannot spread and rapidly run out of nutrients. They also slowly poison themselves with their waste products.
In butter, there is a self-limiting system which stops the bacteria growing. The researchers are already working with food companies keen to see if their products can be made(35)resistant to bacterial attack through alterations to the food’s structure. They believe that 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.
选项
答案
drift about
解析
转载请注明原文地址:https://kaotiyun.com/show/xzl7777K
0
大学英语四级
相关试题推荐
Thetwoeconomistscalltheirpaper"MentalRetirement,"andtheirargumenthasarousedtheinterestofbehavioralresearchers.
Thetwoeconomistscalltheirpaper"MentalRetirement,"andtheirargumenthasarousedtheinterestofbehavioralresearchers.
Thetwoeconomistscalltheirpaper"MentalRetirement,"andtheirargumenthasarousedtheinterestofbehavioralresearchers.
AuniquelaboratoryattheUniversityofChicagoisbusyonlyatnight.Itisadreamlaboratorywhereresearchersareatworks
AuniquelaboratoryattheUniversityofChicagoisbusyonlyatnight.Itisadreamlaboratorywhereresearchersareatworks
A、Itaffectsthegrowthoftrees.B、IthasbeenincreasingsincetheIceAge.C、Itisdeterminedbythechemicalsintheair.D、
Whydoescreamgobadfasterthanbutter?Someresearchersthinkthatitcomesdowntothestructureofthefood,notitschemic
随机试题
()又称为直接分裂
下列不属于中国古代营业习俗的是
目前,世界上大多数国家,包括中国在内,都实行()
2002年6月18日,该房地产抵押评估价值应为()万元。该公司2004年6月18日破产时,该公司能有()万元拍卖款偿还银行。
某储运公司仓储区占地300m×300m,共有8个库房,原用于存放一般货物。3年前,该储运公司未经任何技术改造和审批,擅自将1号、4号和6号库房改存危险化学品。2008年3月14日12时18分,仓储区4号库房内首先发生爆炸,12分钟后,6号库房也发生了爆炸,
小王今年30岁了,由于公司不景气,已经失业在家8周了,正等待寻找新的工作。根据以上资料,回答下列问题:导致磨擦失业原因是()。
短期投资项目的经办人和相关财务人员更换频繁,短期投资业务的变动无人授权,注册会计师应当实施的主要实质性测试程序为( )。E公司本期其他应收款业务发生频繁,但公司没有针对其他应收款项目设计相应的内部控制。经了解,负责其他应收款账户的相关财务人员业务素质
当外部环境遇到良好机遇时,企业可以采用()。
在当今时代,维护世界和平,促进国家统一和发展,需要建立强大的国防。增强国防观念是新时期爱国主义的重要内容。国防观念包括()
ThoughPaulisdisabled,hemanagedtomoveinthehouse.
最新回复
(
0
)