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
2016-08-19
34
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 elec—tricity.”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://jikaoti.com/ti/AY6jFFFM
0
在职申硕(同等学力)英语
相关试题推荐
Computerstodayarecapableof______Thepassagesuggeststhat
Computerstodayarecapableof______Accordingtothepassage,whichofthefollowingstatementsisNOTtrue?
Whatdoestheauthorthinkofthewords"civilization"and"culture"?TheLatinverbcolereoriginallymeans"______"
Anotherkindofdistinctionthatcanbemadeamongworksofartiswhethertheywereintendedasobjectstobelookedatortob
BeautycontestsinBritainarenow______TheauthorusedJacquelineGoldasanexampletoshowthat______
Accordingtoasurvey,whichwasbasedontheresponsesofover188,000students,today’straditional-agecollegefreshmenare"
Beforethe1850’stheUnitedStateshadanumberofsmallcolleges,mostofthemdatingfromcolonialdays.Theyweresmall,chu
Man:Peterlooksveryupsetrecently.Woman:Yes.Ithinkthathehasahardenoughjobtomakeendsmeet.Question:Whatdoesthe
Manystudentsfindtheexperienceofattendinguniversitylecturestobeaconfusingandfrustratingexperience.Thelecturersp
Zooshavebecomeanimportantsiteforthepreservationandprotectionofwildliferesources,【C1】______thosespeciesthatareen
随机试题
A.长期羊奶喂养B.动物血、黄豆、肉类C.过硬、油炸等刺激性食物D.新鲜瓜果、蔬菜E.长期饮用未煮沸的牛奶特发性血小板减少性紫癜患儿应避免吃
女性,27岁,主诉:近1个月全口牙龈增生,影响进食,有牙龈自动出血史。其最不可能的诊断是
城市国有土地使用权出让、转让合同必须附具()。
《中华人民共和国建筑法》规定,建筑工程开工前,( )应当按照国家有关规定向工程所在地县级以上人民政府建设行政主管部门申请领取施工许可证。
某采石场专门生产建筑材料,2005年7月,采石场将应该发给某建筑公司的碎石发给了某路桥公司,同年8月,采石场向路桥公司索取这些石料,但是路桥公司却以采石场要支付这些天的保管费用为归还石料的前提,则分析下列说法正确的是( )。
企业发行认股权和债券分离交易的可转换公司债券,认股权持有人到期没有行权的,企业应当在到期时将原计入其他权益工具的部分转入其他综合收益。()
C语言中当说明一个结构体变量时系统分配给它的内存是结构中第一个成员所需的内存量。()
在美国,学术界、工业界、主管部门和多数消费者倾向于认为用豆浆代替牛奶是一种更健康的选择。不过,绝大多数西方人很不喜欢豆味,所以美国的豆浆有一步去除或掩盖豆味的操作,而中国人就会觉得这样一点儿豆浆味也没有。对奶味的偏好和对豆味的排斥,是豆浆在西方不够受欢迎的
【B1】【B10】
Certainly,themostpopularmethodoftravelingusedbyAmericansistheprivately-ownedautomobile.ThevastmajorityofAmeric
最新回复
(
0
)