Sugar Power for Cell Phones
Using enzymes commonly found in living cells,a new type of fuel cell produces small amounts of electricity from sugar.If the technology is able to succeed in mass production,you may some day share your sweet drinks with your cell phone.
When researchers previously used enzymes in fuel cells,they had trouble keeping them active,says Shelley D.Minteer of St Louis University1.Whereas biological cells continually produce fresh enzymes,theres no mechanism in fuel cells to replace enzymes as they quickly degrade.
In the new fuel Cell,tiny polymer bags of enzyme are embedded in a membrane that coats one of the electrodes.When glucose from a sugary liquid gets into a pocket,the enzyme oxidizes it,releasing electrons and protons.The electrons cross the membrane and enter a wire through which they travel to the other electrode,where they react with.oxygen in the atmosphere to produce water.The flow of electrons through the wire constitutes an electrical current that can generate power.
Sugar-eating fuel cells could be an efficient way to make electricity.Sugar is easy to find. And the new fuel cells that run on it are biodegradable,so the technology wouldnt hurt the environment.The scientists are now trying to use different enzymes that will get more power from sugar.They predict that popular products may be using the new technology in as little as 3 years.
enzymen.酶 electroden.电极platinumn.铂,白金 membranen.膜,薄膜
polymern.聚合物 biodegradableadj.能进行生物降解的
protonn.质子
1. According to the first paragraph,when can we share our sweet drinks with our cell phones?
B When the technology of producing a new type of fuel cell appears.
D When the technology of mass producing cell phones appears.
A They had trouble keeping enzymes in fuel cells active.
C They had trouble producing fresh enzymes.
3. According to Paragraph 5,electrons are released
B when glucose from a sugary liquid goes through the enzyme.
D when the enzyme oxidizes the sugary liquid that goes through a pocket.
A Their limitless power generation capacity is amazing.
C Their limited power generation capacity is the result of great efforts.
5. According to the last paragraph,what is NOT true of the new fuel cells?
B The new fuel cells are environment friendly.
D It will take some time before the new fuel cells can be used in popular products.
C A和D明显不是正确答案。B不是正确选择,因为只有当这种新的燃料电池被大规模生产时,才有可能实现用甜饮料给手机提供电能。
C 该段第二句When glucose from a sugary liquid penetrates a pocket,the enzyme oxidizes it,releasing electrons and proton中的it指代glucose,而不是a sugary liquid,因 此C是正确选择。
D 文章的最后一段指出了这种新型燃料电池的优点,即A、B、C所述内容。最后一句说,科学家预计,在不到三年的时间里这种新技术便可在大众的流行产品中使用。所以D是正确选择
悼念纳什:《美丽心灵》经典台词
专家建议胸衣10天洗一次
对纸币说不 丹麦有望成为首个无现金国家
国内有210所“野鸡大学”
香港股市再现断崖式暴跌
CEO兼董事长渐成濒危物种
爱尔兰“同性婚姻”合法化
英国海关不让游客轻易过关
没勇气分手?你可以雇人跟女友说拜拜
八大职业将遭机器人“抢饭碗”
遵循这个公式 人人都能成为复联超级英雄!
夜猫子还是早起的鸟儿?基因来定夺
美国法院判决苹果手机外观美学不受专利保护
李克强访问秘鲁 推动百亿美元铁路建设
视频网站Netflix寻求进军中国市场
汉能薄膜股价大跌47%后停牌
运营商“边界漫游”遭吐槽
中国发布反垄断新规值得关注
9个特征表明你仍享有青春
蹲便比坐便更健康!
“奶牛舔”也是一种发型
不用very也能让形容词升级
拉丁美洲的基建投资需要中国
美国以经济间谍罪名起诉六名中国公民
节气词汇—小满麦渐黄
测试你的“表情符号智商”
万万想不到:竹子并非大熊猫最理想食物?!
Classic, classical 傻傻分不清楚
多地纪委为官员设“饭局红线”
黄晓明Angelababy拍婚照 明星奢华婚礼盘点
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |