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
17
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.
【B7】
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
reversed
解析
转载请注明原文地址:https://kaotiyun.com/show/tfS7777K
0
大学英语四级
相关试题推荐
Abalanceddietprovidesanadequateintakeofnutrientsformaintenanceofthebodyandthereforegoodhealth.Adietcaneasil
Languageislearnedprimarilythroughcommunicationwithotherpeople.Researchshowsthatthemorecommunicationchildren【S1】__
Asaphysicianwhotravelsquitealot,Ispendalotoftimeonplaneslisteningforthatdreaded"Isthereadoctoronboard?"
Todaywetalkaboutthedifferencebetweenacollegeandauniversity.Collegesanduniversitieshavealotincommon.Theyprep
A、Thefirstlecture.B、Aclassmeeting.C、Theopeningceremony.D、Anorientation.D男士询问经济学课程的相关信息,女士表示前一天介绍会发放的资料中都可以查到这些信息。而男士说
A、Thegovernment’sspeech.B、Theeveningnewsof75cats.C、Aninterviewaboutaman.D、Thecontentoftheirbroadcasts.D男士说自己今
Weallmakepromisesinourdailyinteractionswithothers.Onthe【C1】_____hand,promisessuchas"I’llreturnyourbooknextwe
The【S1】_____employer-basedhealth-insurancesystemexacerbates(加剧)concernsforwomenwhoareconsideringhavingachild.Ifawo
A、Lettinghimhavehisowntelephone.B、Givinghimadviceonlywhennecessary.C、Nottalkingaboutpersonalthingswithhim.D、N
文学是中国文化中最有活力、最灿烂辉煌的一部分。在历史发展的长河里,中国古代文学蕴涵(embody)了中华文化的基本精神,体现了中国人的美学(esthetics)追求,承载了中华民族的理想信念,表现出自己独特的个性和风采。从远古(primevaltimes
随机试题
6岁女孩,诊断为肾病综合征,用泼尼松10mg,qid,治疗20天,尿量正常,水肿减轻,尿蛋白转为阴性。应当告知家长
开口于中鼻道的鼻旁窦为()
某男,60岁,诊为“食管癌”。饮食难下,咽下后很快呕出,胸膈疼痛,形体消瘦,舌紫暗,脉细涩,应辨证为
下列哪项缺乏不会引起牙釉质发育不全()
患者,女性,36岁。右侧乳腺癌根治术后,患者出院时,提示患者掌握了正确的健康教育内容的描述是
公务员工资包括:基本工资、奖金、津贴、补贴。()
根据下面材料回答下列问题。2012年国家发布新修订的《环境空气质量标准》,将大气污染综合防治作为重点工作。根据这一新标准,空气质量指数(AQI)将替代原有的空气污染指数(API),作为定量描述空气质量状况的无量纲指数。在2016年3月上海市AQI变
读书断想钟长江①书和太阳一样,能够给人带来光明和温暖,是我们须臾不可或缺的精神食粮。塞缪尔说过,好书可以引为诤友
甲(25周岁)生意上亏钱,乙(17周岁)欠下赌债,二人合谋干一件“靠谱”的事情以摆脱困境。甲按分工找到丙(15周岁),骗丙使其相信钱某欠债不还,丙答应控制钱某的小孩以逼钱某还债,否则不放人。丙将钱某的10岁小孩丁骗到自己的住处看管起来,电告甲控制了丁,甲通
金州勇士队总经理迈尔斯向队中的四名核心球员询问了他们对是否要向转会市场上四名大牌球员詹姆斯、莱昂纳德、巴特勒和考辛斯进行报价的看法,得到的回复如下:库里:报价詹姆斯,否则报价巴特勒。杜兰特:要么报价莱昂纳德,要么报价巴特勒。汤普森:除非报价考辛斯,否
最新回复
(
0
)