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
考研
Scraps of food could soon be helping power your home, thanks to an ultra-cheap bacteria-driven battery. Its developers hope that
Scraps of food could soon be helping power your home, thanks to an ultra-cheap bacteria-driven battery. Its developers hope that
admin
2010-01-13
29
问题
Scraps of food could soon be helping power your home, thanks to an ultra-cheap bacteria-driven battery. Its developers hope that instead of feeding the dog or making garden compost(混合肥料) ,organic household waste could top up your home’s electricity.
Although such "microbial fuel cells" (MFCs)have been developed in the past, they have always proved extremely inefficient and expensive. Now Chris Melhuish and technologists at the University of the West of England(UWE)in Bristol have come up with a simplified MFC that costs as little as £10 to make.
Right now, their fuel cell runs only on sugar cubes, since these produce almost no waste when broken down, but they aim to move on to carrot power. "It has to be able to use raw materials, rather than giving it a refined fuel," says Melhuish.
Inside the Walkman-sized battery, a colony of E. coil bacteria produce enzymes that break down carbohydrates, releasing hydrogen atoms. The cell also contains chemicals that drive a series of redox, or reduction and oxidation reactions, stripping electrons from the hydrogen atoms and delivering them steadily to the fuel cell’s anode(正极). This creates a voltage that can be used to power a circuit.
To prove the MFC works, the researchers are using it to power a small light-sensitive robot. And when a number of the cells are connected in series, they could power domestic appliances, running a 40-watt bulb for eight hours on about 50 grams of sugar.
Earlier MFCs were inefficient because they relied on energy-hungry filters and pumps. By experimenting with different anode materials, the UWE team have figured out how to make their system work: they dump the bacteria and redox chemicals directly into the cell.
In its current form, the UWE team says its organic battery can produce eight times as much power as any previous MFC. But Melhuish wants to improve this, both by scaling it up and finding a better mix of redox chemicals.
Which of the following statement is NOT TURE according to the passage?
选项
A、The MFC is not a kind of new-developed fuel.
B、The MFC was not spread used in the past partly because of its high cost.
C、The MFC was proved to be able to power domestic appliance.
D、The previous MFC can produce eight times as much power as the current organic battery.
答案
D
解析
在第二段开始提到,“Although such‘microbial fuel cells’(MFCs) have been developed in the past,they have always proved extremely inefficient and expensive.”虽然微生物能源电池早在过去已经得到发展,但是却被证明是非常无效及昂贵的。从这句可知,A,B是正确的。而在后面提到,“when a number of the cells are connected in series,they could power domestic appliances”所以C也正确。D选项应该是“organic battery can produce eight times as much power as any previous MFC”有机电池产生的能量是过去微生物电池的八倍,所以D不正确。
转载请注明原文地址:https://kaotiyun.com/show/Pimi777K
0
在职申硕(同等学力)英语
相关试题推荐
Onereasonformalariatobewidespreadnowisthat______Lanzaroisconfidentthatscientistscanblocktransmissionofmalar
Thebookshiftedheroutlookfromsocialtospiritual,foritsthemewasthatbeforeyouchangeotherpeopleyouhavetochange
Whatismostremarkableabouttheproposalmadebythetwoscientists?Thepassageismainlywrittento______.
Whatismostremarkableabouttheproposalmadebythetwoscientists?Ifwhatisproposedbythetwoscientistsbecomestrue,
Man:Everybody’shelpingoutwiththedinner.Wouldyoumakethesalad?Woman:Anythingbutthat.Question:Whatdoesthewoman
BeforehighschoolteacherKimberlyRughgotdowntobusinessatthestartofarecentschoolweek,shejokedwithherstudents
Wilmutmaintainsthatcloninganimalshastremendouspotentialforhelpingpeople.ClonedSheep,hesays,couldbeusedaslivin
ThanksgivingDayisanannualholidaycelebratedintheUnitedStatesonthefourthThursdayinNovember,anditismostclosely
ThanksgivingDayisanannualholidaycelebratedintheUnitedStatesonthefourthThursdayinNovember,anditismostclosely
ThanksgivingDayisanannualholidaycelebratedintheUnitedStatesonthefourthThursdayinNovember,anditismostclosely
随机试题
阅读韩愈《张中丞传后叙》中的一段文字,然后回答下题。说者又谓远与巡分城而守,城之陷,自远所分始。以此诟远。此又与儿童之见无异。人之将死,其脏腑必有先受其病者;引绳而绝之,其绝必有处。观者见其然,从而尤之,其亦不迭于理矣!小人之好议论,不乐成人之美,
当血小板低于下列哪项指标时可引起严重出血()
A.硝酸甘油B.钙拮抗剂C.利尿剂、血管扩张剂、强心剂D.利多卡因E.胺碘酮心绞痛的药物治疗应首选
会计凭证审核人员和制单人员不能是同一人。()
制定保险规划的风险主要体现在()。
忌绿色和荷花图案的国家是()。
事业单位编制的改革需要本着精简、效能和()的原则进行。
一、注意事项1.申论考试是对应试者阅读理解能力、综合分析能力、提出和解决问题能力、文字表达能力的测试。请仔细阅读给定资料,按要求作答。2.本试题供报考县以上机关的考生使用。二、给定资料资料一近几年来,不少地方出现了“网络募捐热
根据以下资料。回答下题。2012年上半年世界62个主要产钢国和地区粗钢产量76686万吨,同比增长0.88%,按日均计算仅增长0.32%,扣除我国粗钢产量外日均产量同比下降0.5%。下列选项中,2011年6月粗钢产量高于2011年上半年平均水平的是
Hefailedtoliveupto______hadbeenexpectedofhim.
最新回复
(
0
)