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
2018-08-10
9
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)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. coli 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. 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.
Earlier MFCs were inefficient because they______.
选项
A、produced very little electricity
B、required different anode materials
C、consumed much energy on filters and pumps
D、could only run domestic appliances
答案
C
解析
感觉第六段的相关内容:“Earlier MFCs were inefficient because they relied on energy-hungry filters and pumps.”energy-hungry意为“耗能多的”。故选C。
转载请注明原文地址:https://kaotiyun.com/show/xZLi777K
0
在职申硕(同等学力)英语
相关试题推荐
A:I’mafraidIhavespilledsomecoffeeonthetablecloth.B:______
A.YoushouldhangontothesharesB.theytookahitlastweek.C.it’snothingtooserious.A:Haveyoumademoneyfromyour
TheEnglishword"veto"means"Iwillnotpermit".Itisawayforonememberofagrouporgovernmentto【C1】______actionbyo
(Electronic)mailtodescribeanupcomingworkshop(shoulduse)only(if)potentialparticipantsusethisformofcommunication
Thenewsreportscompletelyoverlookedthemoreprofoundpoliticalimplicationsoftheevents.
Althoughinteriordesignhasexistedsincethebeginningofarchitecture,itsdevelopmentintoaspecializedfieldisreallyqui
rathermaketoA.(56)______thanforasinglejobB.Othersstick(57)______workC.manyyoungpeoplehaveto(58)______careerp
rathermaketoA.(56)______thanforasinglejobB.Othersstick(57)______workC.manyyoungpeoplehaveto(58)______careerp
Accordingtothepassage,thereisatendencythatscientificpapers______Accordingtothepassage,whethermultipleauthors
Everyyeartelevisionstationsreceivehundredsofcomplaintsabouttheloudnessofadvertisements.However,federalrulesforbi
随机试题
会计档案是指记录和反映经济业务事项的重要历史资料和证据,包括()。
截至2007年4月尚未完成股份制改造的银行是()。
Manypeoplewhoreadthedocumentcomplainedthatitincludedtoomuchinformationthatwasnot______tothemainissue.
右面所给的四个选项中,哪一项不能由左边给定的图形折成?
《法经》中规定侵犯官私财产行为的篇目是()。
在考生文件夹下有一个数据库文件"samp3.mdb",里面已经设计了表对象"tEmp"、窗体对象"fEmp"、报表对象"rEmp"和宏对象"mEmp"。请在此基础上按照以下要求补充设计:(1)设置表对象"tEmp"中"聘用时间"字段的有效性规则为
Stinking(发臭的)BusesStinkingbusesjam(挤满)thecrowdedstreet.Drivers(51)atoneanotherandhonk(鸣喇叭)theirhorns.Smog(烟雾)h
Today,theTowerofLondonisoneofthemostpopulartourist【C1】______andattractso-verthreemillionvisitorsayear.Itwas
【S1】【S5】
A、Becauseonlyrichpeoplecanaffordthewatches.B、Becausethewatchesweremademanyyearsago.C、Becauseonlyafewwatches
最新回复
(
0
)