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
66
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.
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
本题是具体细节题。答案可以在第6段第1句话because they relied on energy-hungry filters and pumps中找到。
转载请注明原文地址:https://kaotiyun.com/show/Dimi777K
0
在职申硕(同等学力)英语
相关试题推荐
Therearehiddenfactorswhichscientistscall"feedbackmechanisms".Nooneknowsquitehowtheywillinteractwiththechangin
Tocontrol(quality)and(making)decisions(about)productionareamongthemanyresponsibilitiesofan(industrial)engineer.
Scientistsarehopingtoeliminatemalaria(疟疾)bydevelopingageneticallymodifiedmosquitothatcannottransmitthedisease.
Doesmoneybuyhappiness?It’ssometimessaidthatscientistshavefoundnorelationshipbetweenmoneyandhappiness,butthat’s
A:I’manxioustogetstartedonmyproject.Canwediscussitsometimebeforetheweekend?B:______
Whatismostremarkableabouttheproposalmadebythetwoscientists?Whichofthefollowingcanbestdescribetheattitudeof
Man:I’vemadeadecisionaboutmytermpaper.It’sgoingtofocusontheIndustrialRevolution.Woman:Thatmightnotbeapp
Woman:Thanksalot!Thisscarfwillbeperfectwithmybluejacket.Man:Madeagoodchoice,didI?Question:Whatdoest
Wilmutmaintainsthatcloninganimalshastremendouspotentialforhelpingpeople.ClonedSheep,hesays,couldbeusedaslivin
ThanksgivingDayisanannualholidaycelebratedintheUnitedStatesonthefourthThursdayinNovember,anditismostclosely
随机试题
《学会生存》一书指出:“可能平等地受教育,这只是平等的必要条件,而不是它的充分条件……平等的机会必须包括同样成功的机会”“机会平等是要肯定每一个人都能受到适当的教育,而且这种教育的进度和方法是适合个人特点的。”这主要阐述了()。
数字通信比模拟通信抗干扰能力强。()
治疗心衰使用扩张血管药硝普钠时护士除观察血压、心率外,还应注意( )。
下列属于导致我国儿童伤害死亡第一位的是()
某男性工人,先后从事煤矿开采工和矿场采石工,年龄45岁,工龄10年以上。因主诉咳嗽、气短、胸痛就诊。X线胸片呈现肺纹理增加,伴有块状阴影和典型结节,诊断时应注意哪种尘肺
监理单位应根据所承担的监理任务,组建驻工地监理机构。监理机构一般由()组成。
商业银行的经营是其对所开展的各种业务活动的()。
下列各项中,属于认定层次重大错报风险的是()。
在司法实践中,应当强调法律效果优于社会效果。()
It’safactoflifeinthe21st-centuryworkplace:Thebossmaywellbewatchinghisemployees,especiallyiftheyuseacompute
最新回复
(
0
)