Cell Phone Lets Your Secret Out
Your cell phone holds secrets about you. Besides the names and numbers that youve programmed into it, traces of your DNA linger on the device, according to a new study.
DNA is genetic material that appears in every cell. Like your fingerprint, your DNA is unique to you-- unless you have an identical twin. Scientists today routinely analyze DNA in blood, saliva, or hair left behind at the scene of a crime. The results often help detectives identify criminals and their victims. Your cell phone can reveal more about you than you might think.www.zcyy8.com
Meghan J. McFadden, a scientist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cell phone and later dropped the device This made her wonder whether traces of DNA lingered on cell phones--even when no blood was involved. So she and colleague Margaret Wallace of the City University of New York analyzed the flip-open phones of 10 volunteers. They used swabs to collect invisible traces of the users from two parts of the phone: the outside, where the user holds it, and the speaker , which is placed at the users ear.
The scientists scrubbed the phones using a solution made mostly of alcohol. The aim of washing was to remove all detectable traces of DNA. The owners got their phones back for another week. Then the researchers collected the phones and repeated the swabbing of each phone once more.
The scientists discovered DNA that belongs to the phones speaker on each of the phones. Better samples were collected from the outside of each phone, but those swabs also picked up DNA that belonged to other people who had apparently also handled the phone. Surprisingly , DNA showed up even in swabs that were taken immediately after the phones were scrubbed. That suggests that washing wont remove all traces of evidence from a criminals device. So cell phones can now be added to the list of clues that can clinch a crime-scene investigation.
手机泄露了你的秘密
你的手机承载着你的秘密。一项新研究发现,手机里除了存有你输入的名字和号码外,还留有你的微量DNA。
DNA是基因物质,出现在每个细胞里,如同指纹,你的DNA是独一无二的除非你是同卵双生双胞胎之一。今天科学家一般可以在犯罪现场遗留的血液、唾液、毛发中分析出DNA。分析结果经常能帮侦探识别罪犯和受害人。你的手机能透露出比你想象的要多得多的信息。
安大略省汉密尔顿McMaster大学的科学家Meghan J.McFadden听说了在一起犯罪中嫌疑人的血流到了手机上,后来还丢掉了手机。这让她想到手机上是否留下了犯罪嫌疑人的DNA即使血不流到手机上。所以,她和纽约城市大学的同事Margaret Wallace分析了10个志愿者的翻盖手机。他们使用药签从手机的两个部位,即使用者把持的外壳,靠近使用者耳部的听筒部分,采集到了肉眼看不到的手机使用者的微量DNA。
科学家们用一种主要由酒精构成的溶液擦洗手机。擦洗的目的是去除所有易被察觉的DNA。之后,机主拿回手机使用一周。接着,研究者又把手机收回来,重复了用药签采取每部手机遗留微量DNA的步骤。
科学家们在每部手机的听筒部分都发现了DNA,从手机外壳的取样更为明显,但手机外壳的取样中还发现了那些曾摆弄过该手机的其他人的DNA.令人称奇的是,DNA甚至出现在擦洗手机之后的药签中,这意味着清洗不会完全去掉罪犯手机上的微量DNA证据。因此,现在手机可以作为协助犯。
国内英语资讯:China Focus: Central, Eastern European businessmen pursuing opportunities at Chinese expo
体坛英语资讯:Wang snatches Chinese derby win over Zheng at French Open
国际英语资讯:10 politicians join race to succeed May as Britains prime minister
国际英语资讯:UNEP official says partnerships key to ensure green Belt and Road projects
NASA将向公众开放国际空间站 每人每晚3.5万美元
国内英语资讯:Xinhua Headlines: Xis neighborhood diplomacy to forge closer community with shared future
2019年6月大学英语四级作文范文:住房问题
The Heroines in Fairy Tales 童话故事的女主角
国际英语资讯:Interview: China, Egypt promote tourism exchange amid strengthening ties: Chinese envoy
读书好还是听书好?这是个问题
警务调度员也有脆弱的时候
国际英语资讯:Turkey understands NATOs concerns on Russian missile deal: FM
国际英语资讯:UN-appointed panel calls for cooperation to harness benefits, avoid harms of digital technol
国内英语资讯:Senior official stresses modernization of rural governance system, capacity
国内英语资讯:China sees over 6 mln entries, exits during Dragon Boat Festival holiday
How to Develop Interest of Study 如何培养学习的兴趣
国际英语资讯:Yemens Houthi rebels claim drone attacks on Saudi air base
体坛英语资讯:Last seasons disappointment inspires Liverpool, Klopp
国内英语资讯:Top political advisor consults with non-Communist parties on innovation-driven development
国际英语资讯:Pompeo says U.S. to continue negotiation after DPRKs tactical weapon test-firing
国际英语资讯:New Zealand becomes first country to hand over genocide archives to Rwanda
国内英语资讯:China, Russia vow to further energy cooperation
2019年6月英语四级作文冲刺押题
身体健康从何处入手?
又到一年飞絮季 北京绘“杨柳地图” 力争到2020年改善
国际英语资讯:Greek PM asks president for dissolution of parliament, call early general elections
史上最年轻的亿万富翁?
国内英语资讯:China-Kenya ties growing stronger amid positive outcomes: envoy
国际英语资讯:Pakistans anti-graft body arrests former President Zardari
体坛英语资讯:Top-ranked Osaka labors through, Wang triumphs Chinese derby at French Open
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |