日本高清色视频在线视频在,国产香蕉97碰碰视频碰碰看,丰满少妇av无码区,精品无码专区在线,久久无码专区免费看,四虎欧美精品永久地址99,亚洲色无码一区二区三区

 
 
 

New Nanoparticles May Replace Chemicals

VOA 2015-08-24 14:31

分享到

 

Using pesticides to battle harmful bacteria that attack fruit and vegetables has its downside, releasing harmful chemicals onto the crops and into the environment. Scientists at the North Carolina State University say they may be able to replace those chemicals with a new type of eco-friendly nanoparticles.

New Nanoparticles May Replace Chemicals

Get Flash Player

Large farms use various chemicals to fight fungi and bacteria that attack crops, and others such as e. coli that are harmful to humans.

Among the most potent elements of modern pesticides - and even some antibiotics - are silver-based nanoparticles, which attach to microbes and destroy them. But as those nanoparticles degrade, they release the silver from their metallic core, which may be harmful.

“The effects are not, potentially maybe not so good for environment or human ingestion, so the problem is how do you potentially remove that danger from engineered nanomaterials,” said Orlin Velev, a professor of chemical and biomolecular engineering.

Velev and Ph.D. student Alexander Richter discovered that silver-based nanoparticles can be replaced with non-harmful nanoparticles based on an organic polymer called lignin, naturally found in most plants.

Such nanoparticles, designated as EbNPs, also carry highly active silver ions that attach to and kill bacteria, but their core is biodegradable and not harmful to the environment.

“By doing so, we could actually make the nanoparticles keep their functionality but make them degradable while also reducing the amount of the silver core in the nanoparticle system,” Richter said.

Based on their research, Velev and Richter founded a start-up company that will continue developing the method for industrial-grade production.

“We believe that this can lead to a new generation of agricultural treatment products, that they're going to be more efficient, that they're going to use less chemicals, and that they're going to be more friendly toward the environment,” Velev said.

They say their biodegradable nanoparticles could also be used in consumer products such as disinfectants and personal hygiene items.

Vocabulary

nanoparticle:納米粒子;納米顆粒

polymer:[高分子] 聚合物

lignin:[木] 木質(zhì)素

來源:VOA

編輯:丁一

上一篇 : Furniture Printed Out of Plastic Waste
下一篇 :

 

分享到

中國日報網(wǎng)英語點津版權說明:凡注明來源為“中國日報網(wǎng)英語點津:XXX(署名)”的原創(chuàng)作品,除與中國日報網(wǎng)簽署英語點津內(nèi)容授權協(xié)議的網(wǎng)站外,其他任何網(wǎng)站或單位未經(jīng)允許不得非法盜鏈、轉(zhuǎn)載和使用,違者必究。如需使用,請與010-84883561聯(lián)系;凡本網(wǎng)注明“來源:XXX(非英語點津)”的作品,均轉(zhuǎn)載自其它媒體,目的在于傳播更多信息,其他媒體如需轉(zhuǎn)載,請與稿件來源方聯(lián)系,如產(chǎn)生任何問題與本網(wǎng)無關;本網(wǎng)所發(fā)布的歌曲、電影片段,版權歸原作者所有,僅供學習與研究,如果侵權,請?zhí)峁┌鏅嘧C明,以便盡快刪除。

中國日報網(wǎng)雙語新聞

掃描左側二維碼

添加Chinadaily_Mobile
你想看的我們這兒都有!

中國日報雙語手機報

點擊左側圖標查看訂閱方式

中國首份雙語手機報
學英語看資訊一個都不能少!

關注和訂閱

本文相關閱讀
人氣排行
熱搜詞
 
 
精華欄目
 

閱讀

詞匯

視聽

翻譯

口語

合作

 

關于我們 | 聯(lián)系方式 | 招聘信息

Copyright by chinadaily.com.cn. All rights reserved. None of this material may be used for any commercial or public use. Reproduction in whole or in part without permission is prohibited. 版權聲明:本網(wǎng)站所刊登的中國日報網(wǎng)英語點津內(nèi)容,版權屬中國日報網(wǎng)所有,未經(jīng)協(xié)議授權,禁止下載使用。 歡迎愿意與本網(wǎng)站合作的單位或個人與我們聯(lián)系。

電話:8610-84883645

傳真:8610-84883500

Email: languagetips@chinadaily.com.cn

<strong id="xdwva"><div id="xdwva"></div></strong>
<label id="xdwva"></label>

<thead id="xdwva"></thead>
    <label id="xdwva"></label>

  1. 日本高清色视频在线视频在,国产香蕉97碰碰视频碰碰看,丰满少妇av无码区,精品无码专区在线,久久无码专区免费看,四虎欧美精品永久地址99,亚洲色无码一区二区三区