三级aa视频在线观看-三级国产-三级国产精品一区二区-三级国产三级在线-三级国产在线

 
 
 

High-tech images show how viruses infect cells

2013-01-31 10:22

 

Get Flash Player

Get Flash Player

Download

HOUSTON -- As people around the world contend with illnesses caused by viruses, including this year's strain of the flu or influenza, researchers continue to study how viruses work and how they manage to invade living cells in everything from bacteria to human organs. University of Texas researchers recently collaborated on an innovative technique that allowed them to see a virus in the act of infecting a cell.

At the University of Texas Medical School at Houston, Jun Liu uses a powerful electron microscope to examine E. coli bacteria and the tiny T-7 virus that infects them.

Liu says until now, scientists could only speculate on how this virus injected its genetic material into another cell, because it happens in an instant.

“Before they inject in, they do not have a channel. After they inject in, they actually degrade the channel, so you never have a chance to see it,” Liu said.

But in a collaborative study with other University of Texas colleagues, Liu used the electron microscope to examine quick-frozen solutions full of bacteria and viruses.

“Because when you freeze it, it is kind of like a snapshot that captures some intermediate stage. This is one of the highlights of this study, because we captured this intermediate stage that nobody had seen before,” Liu said.

This sophisticated technology was applied to a particular virus in this study, but what the researchers found could be useful in studying other viruses in the future, viruses that cause many diseases, such as influenza, or AIDS.

That is the hope of study participant Ian Molineux, professor of biology at the University of Texas main campus in Austin, who prepared the virus samples used in the study.

“If we can find a way of blocking any of multiple steps towards the final internalization of the genetic material, it provides the potential for finding more anti-viral drugs,” Molineux said.

An animation, produced for Science magazine by the American Association for the Advancement of Science, shows how the virus puts out tendrils to, in effect, “walk” on the cell surface.

"Then it stops moving and all the legs come down and get fixed on the cell surface, and the infection begins to initiate," Molineux said.

Molineux says the collaborative effort with Liu and others paid off, with each member of the team bringing his own area of expertise into play.

“We have a very strong collaboration. We are looking at other viruses now,” Molineux said.

He says each advance in understanding how viruses function brings researchers closer to finding ways to defeat them - and save lives.

相關閱讀

France deploys special forces as terrorism fears grow

Classical sounds invade country music capital

Up to half of world food production is wasted(視頻)

Focus turns to immigration reform(視頻)

(來源:VOA 編輯:Julie)

 
中國日報網英語點津版權說明:凡注明來源為“中國日報網英語點津:XXX(署名)”的原創作品,除與中國日報網簽署英語點津內容授權協議的網站外,其他任何網站或單位未經允許不得非法盜鏈、轉載和使用,違者必究。如需使用,請與010-84883561聯系;凡本網注明“來源:XXX(非英語點津)”的作品,均轉載自其它媒體,目的在于傳播更多信息,其他媒體如需轉載,請與稿件來源方聯系,如產生任何問題與本網無關;本網所發布的歌曲、電影片段,版權歸原作者所有,僅供學習與研究,如果侵權,請提供版權證明,以便盡快刪除。

中國日報網雙語新聞

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:本網站所刊登的中國日報網英語點津內容,版權屬中國日報網所有,未經協議授權,禁止下載使用。 歡迎愿意與本網站合作的單位或個人與我們聯系。

電話:8610-84883645

傳真:8610-84883500

Email: languagetips@chinadaily.com.cn

主站蜘蛛池模板: 国产精品特黄一级国产大片 | 国产高清在线视频伊甸园 | 成 人 黄 色 全 集 | 亚洲午夜久久久久国产 | 国产精品黄页网站在线播放免费 | 美女免费观看一区二区三区 | 4k岛国精品午夜高清在线观看 | 国产淫视频| 免费人成网站线观看合集 | 国产在线成人a | 日本免费大黄在线观看 | 久久国产免费一区 | 欧美亚洲综合在线 | 久久这里只有精品免费播放 | 2022国内精品免费福利视频 | 欧美色视| 国产极品白嫩超清在线观看 | 美女一级视频 | 久久综合欧美 | 国产精品手机网站 | 色婷婷综合久久久久中文 | 亚洲人成网站色7799在线观看 | 国产欧美一区二区三区久久 | 一级做片爱性视频免费 | 成人av手机在线观看 | 深夜爽爽爽gif福利免费 | 亚洲欧美日韩中文高清ww | 国产视频1区| 久久精品国产精品亚洲综合 | 好色影院 | 亚洲乱码一二三四区国产 | 久青草国产手机在线视频 | 国产精品成人网 | 青青伊人91久久福利精品 | 亚拍一区| 亚洲午夜精品aaa级久久久久 | 久久综合一区二区三区 | 狠狠干中文字幕 | 欧美国产一区二区三区 | 99久久免费中文字幕精品 | 久久精品亚洲一区二区 |