网站标志
自定内容
铜仁地区哪里有卖麻醉剂的
http://www.xiangganghuanleyuan.com/    2013-09-18 15:20:57    文字:【】【】【
摘要:铜仁地区哪里有卖麻醉剂的
铜仁地区哪里有卖麻醉剂的During the past dozen years or so, several research groups have tried various ways to use these microbes as bio-铜仁地区哪里有卖麻醉剂的generators, but tapping this energy efficiently has proven challenging.

 

In the new study, researchers from the Stanford Universit铜仁地区哪里有卖麻醉剂的y devised "a simple yet efficient" way that puts naturally-occurring "wired microbes" to work as mini power plants.

 

The researchers plunged two electrodes, one positive, the other negative, into a bottle of wastewater to create a laboratory prototype about the si铜仁地区哪里有卖麻醉剂的ze of a D-cell battery.

 

At the battery's negative electrode, colonies of wired microbes cling to carbon filaments that serve as efficient electrical conductors. Using 铜仁地区哪里有卖麻醉剂的a scanning electron microscope, the Stanford team captured images of these microbes attaching milky tendrils to the carbon filaments.

 

"You can see that the microbes make nanow铜仁地区哪里有卖麻醉剂的ires to dump off their excess electrons," said co-author Craig Criddle, a professor in the department of civil and environmental engineering.

 

About 100 of these microbes could fit, si铜仁地区哪里有卖麻醉剂的de by side, in the width of a human hair, the researchers said.

 

As these microbes ingest organic matter and convert it into biological fuel, their excess electrons flow into the carbon filaments and across to th铜仁地区哪里有卖麻醉剂的e positive electrode, which is made of silver oxide, a material that attracts electrons, the researchers said.

 

The electrons flowing to the positive node gradually reduce the silver oxide to silver, storing the spare electrons in the process. According to the researchers, after a day or so the positive electrode has absorbed a full load of electrons and has铜仁地区哪里有卖麻醉剂的 largely been converted into silver.

 

When the positive electrode is spent, it can be removed from the battery and re-oxidized back to silver oxide, releasing the stored electrons. Si铜仁地区哪里有卖麻醉剂的mply reinstalling the electrode resumes power, they said.

 

The researchers estimated that the microbial battery can extract about 30 percent of the potential energy locked in wastewater, "roughly the same 铜仁地区哪里有卖麻醉剂的efficiency at which the best commercially available solar cells convert sunlight into electricity."

 

Although there is far less energy potential in wastewater, the microbial battery is worth pursuing because it could offset some of the electricity now 铜仁地区哪里有卖麻醉剂的use to treat wastewater, which currently accounts for about three percent of the total electrical load in the developed countries, said the researchers.

 

The Stanford team, however, cautioned that finding a cheap but efficient material for the positive node will be their biggest challenge for develo铜仁地区哪里有卖麻醉剂的ping devices for large-scale power production.

 

"We demonstrated the principle using silver铜仁地区哪里有卖麻醉剂的 oxide, but silver is too expensive for use at large scale," said co-author Yi Cui, an associate professor of materials science and engineering. " Though the search is underway for a more practical material, finding a substitute will take time."

 

 

 

 From: http://www.xiangganghuanleyuan.com/englishnews/

浏览 (8056) | 评论 (3) | 评分(5) | 支持(0) | 反对(0) | 发布人:铜仁地区哪里有卖麻醉剂的
将本文加入收藏夹
相关文章
 
 
当前位置
脚注信息
紧急通知如果大家有收到冒充本公司货到付款的,请不要签收,我们一定严惩不贷。
Copyright 2009-2019 All Rights Reserved. 香港欢乐园商業網站管理系統 版權所有   編號備0852412號
服務時間:周壹至周日 08:30 — 20:00  全國訂購及服務熱線:
135-3773-6321
聯系地址:香港九龙尖沙咀加连威老道25A 深圳市振興路西華均大廈20樓B座2008室 上海碼頭倉庫海上中轉區
  点击这里给我发消息点击这里给我发消息点击这里给我发消息点击这里给我发消息
        
本公司设立在香港,受港法律保护,如有违反当地法规请自觉离开,本公司产品只针对夜场和实验出售。
访问统计
QQ客服
点击这里给我发消息  售前客服
点击这里给我发消息  会员客服售前
点击这里给我发消息  售后客服
点击这里给我发消息  售后客服
电话:135-3773-6321