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
1
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.
【B3】
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
distributed
解析
转载请注明原文地址:https://jikaoti.com/ti/EhCFFFFM
0
大学英语四级
相关试题推荐
Abalanceddietprovidesanadequateintakeofnutrientsformaintenanceofthebodyandthereforegoodhealth.Adietcaneasil
Abalanceddietprovidesanadequateintakeofnutrientsformaintenanceofthebodyandthereforegoodhealth.Adietcaneasil
Itisnotsurprisingthataphilosophyborrowedfrombusinessshouldseeitsprincipalfocuswithineducationasthefurthering
AmericanKaroshi(过劳死)Workaholics(工作狂)inAmericaAthin,40-somethingmanwithscatteredwhitehairandwan(苍白的)complex
ResearchersreportthatobesityrelatestoDNA.Somechildrengetobese【C1】______theylackparticularchunksofDNA,whichkicks
A、Theyshouldhelpotherfamiliesthewaytheyhavebeenhelped.B、Theyshouldofferallbabyanimalstotheirpoorneighbors.C
A、Sheturnedadeafeartohim.B、Shehelpedhimwhole-heartedly.C、Shegotangryandflewintoafury.D、Shecalledinthepoli
IwasstudyingtheateratSouthernMethodistUniversityinDallasandfeeling【B1】______anduncertainaboutmyfuture.WillIbe
A、Hisprojectisgoingverywell.B、Heneedsfinancialsupport.C、It’sdifficulttofinishhisproject.D、Heneedscapableperso
A、Hecannotreturnthemoneyrightnow.B、Hecanreturnthemoneytoday.C、Hecannotreturnthemoneythismonth.D、Hewantsto
随机试题
执行语句“chara[10]={"abcd"),*p=a;”后,*(p+2)的值是()
承包商是为项目提供工程劳务的组织者或设备制造者,其对工程项目管理的目的包括()。
在同一月份内投产的产品批数较多时可以采用简化分批法,以下各项中,关于简化分批法特点的表述正确的有()。
甲公司为增值税一般纳税人,主要从事汽车销售和维修业务,2017年1月有关经济业务如下:(1)进口小汽车一批,取得海关进口增值税专用缴款书注明增值税税额187万元;(2)购进维修用原材料及零配件,取得增值税专用发票注明税额100.3万元;
资本资产定价模型是估计权益成本的一种方法,下列关于资本资产定价模型参数估计的说法中,正确的有()。
1979年被列入《世界遗产名录》的阿布.辛拜勒神庙建于()。
每一个社会中的人都有权利接受教育同时也必须接受教育。()
人类具有一种维持平衡和一致性的需要,力求维持自己观念的一致以保持心理平衡。这一观点来自()。
下列结构中属于线性结构链式存储的是
Totalinvestmentsforthisyearreached$56million,andtoputthisinto_____investmentsthisyearwilldoublethosemadein199
最新回复
(
0
)