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
2013-11-21
58
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.
【B8】
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
compartments
解析
转载请注明原文地址:https://kaotiyun.com/show/3fS7777K
0
大学英语四级
相关试题推荐
CommunityCollegeCommunityColleges,institutionsofhighereducationoffertwo-yearprogramsofgeneralstudyortechnical
A、Description.B、Argumentation.C、Joke.D、Exposition.CWhat’stheformofthispassage?
Itisnotsurprisingthataphilosophyborrowedfrombusinessshouldseeitsprincipalfocuswithineducationasthefurthering
Althoughtheterm"globalwarming"hasbecomeincreasinglyfamiliartothegeneralpublic,arecentsurveycarriedoutbytheCh
A、Ashopassistant.B、Alibrarian.C、Asecretary.D、Ateacher.B女士话里包含了关键特征词book,thereserveroom,thereservelibrarian,intheli
Todaywetalkaboutthedifferencebetweenacollegeandauniversity.Collegesanduniversitieshavealotincommon.Theyprep
CaringforFamily,CaringforYourselfWhetheryouchoosetobeafamilycaregiverorthejobisthrustuponyoubycircumst
A、Itturnedouttobequitedifferentfromallofficialreports.B、Itwasnotconfirmedbythefactuntilmanyyearslater.C、It
A、Airtrafficconditions.B、Trafficjamsonhighways.C、Roadconditions.D、Newtrafficrules.A短文中提到,在未来几年,不是有关道路和高速公路交通状况的电台报道,
A、Heorganizesinternationalflightsfortourists.B、Hetravelsaroundtheworldwithcheaptickets.C、Hedeliverspapersandpa
随机试题
阴阳的对立制约,可体现于:()
猪巨吻棘头虫的感染方式为
()是对符合招标文件规定的商务和技术实质要求的投标文件,根据招标文件规定的办法、因素、标准对投标报价、技术因素和商务因素采用货币量化折算评估。
建设项目的环境影响报告书包括的内容有()。
不属于限额设计所包括的是()。
航显系统服务器、存储系统应采用()供电。
Therequirementsforhighschoolgraduationhavejustchangedinmycommunity.Asaresult,allstudentsmust【C1】______sixtyhou
马克思说;“一切商品对它们的所有者是非使用价值,对它们的非所有者是使用价值。”这句话应理解为
【B1】【B8】
TurningBrownfieldsintoGreenbacksInactiveindustrialsitesaretransformingintoproductivefacilities.Brownfieldsa
最新回复
(
0
)