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
2016-11-07
21
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 U-niversity 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.
Chris Melhuish and technologists are trying to use household wastes to________.
选项
A、feed domestic animals
B、make garden compost
C、produce electricity
D、manufacture bacteria
答案
C
解析
细节题。根据第一段最后一句“…organic household waste could top up your home’s electricity.”可知,使用家庭垃圾的目的就是发电,故选C。
转载请注明原文地址:https://kaotiyun.com/show/NoLi777K
0
在职申硕(同等学力)英语
相关试题推荐
ThanksgivingDayisanannualholidaycelebratedintheUnitedStatesonthefourthThursdayinNovember,anditismostclosely
Accordingtosociologists,thereareseveraldifferentwaysinwhichapersonmaybecomerecognizedastheleaderofasocialgr
Beforethe1850’stheUnitedStateshadanumberofsmallcolleges,mostofthemdatingfromcolonialdays.Theyweresmall,chu
Man:Penny’sstillgoingtoSmithCollege,isn’tshe?Woman:No.IheardshetransferredtoYale.Question:Whatdotheysayabo
Daltonwonderedwhytheheavierandlightergasesintheatmospheredidnotseparateasoilandwaterdo.Hefinallyconcludedt
Thediscrepancyinthecompanyaccountsisso______thatnoauditorcouldhavefailedtonoticeit.
Thescientists,(concernedabout)thepotentialhazards,demanded(thelatest)researchfinding(made)(publicly).
Some23millionadditionalU.S.residentsareexpectedtobecomemoreregularusersoftheU.S.healthcaresysteminthenexts
It’samodemproblem:you’retoobusytobedisturbedbyincessantphonecallssoyouturnyourcellphoneoff.Butifyoudon’t
disapprovalthatnorA.influencechoicesbyvoicing(56)______ofsomeoneB.interclassmarriagesareneitherrare(57)______sho
随机试题
在(),逃避侦查或者审判的,不受追诉期限的限制。
任何两个并发进程之间
不符合乳腺纤维腺瘤特征的是
某位先生在食用大量海鲜后出现恶心、呕吐、腹泻、发热、上腹部疼痛,脐部阵发性绞痛,患者最有可能是()
劳合社的()遍及全球,是当今最重要的国际保险市场之一
采购部门在收到请购单后,只能对经过批准的请购单发出订货单。对每张订货单,采购部门应确定最佳的供应来源。()
“东边日出西边雨”这种天气现象发生的季节是()。
任何一项政策,它的功能都是通过事物间相互联系的动态形式所产生的作用而实现的。作用一般都是相互的。当一个事物对另一个事物发生作用时,必然要受到对方对它的反作用。这段话主要支持了这样一种观点,即( )。
【淮军】北京大学2001年中国通史真题;兰州大学2016年历史学综合真题
Thepatient,accordingtotheanalyst’sreport,is
最新回复
(
0
)