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SSS 2008-10-28

时间:2010-05-15 03:11来源:互联网 提供网友:木渐浅。   字体: [ ]
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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute.

As long as there have been mice, people have sought a better mousetrap. And since we figured out that bacteria can make us sick, we’ve searched for better antibiotics2. Now scientists in Canada and Japan have come up with a new way to disarm3 the bugs4 that cause food poisoning.

Most antibiotics directly attack the microbes that make us ill. Penicillin5, for example, weakens bugs’ tough outer wall to the point that many of them simply explode. While such treatment kills the bacteria, it doesn’t necessarily eliminate the threat. Because a lot of bugs produce toxins7, and it’s the toxins that knock us for a loop. Blowing up the bugs can just make things worse.

What these researchers have designed is a drug that helps the body mop up bacterial8 toxins. In their study, a single injection of the drug protected mice from the potentially lethal9 effects of shiga toxin6, the sick-making molecule10 produced by the kinds of E. coli that cause food poisoning. Their results appear in the October 28th issue of the Proceedings11 of the National Academy of Sciences. With antibiotic1 resistance on the rise, having more weapons in our antibacterial arsenal12 is not a bad idea. Because anyone who’s eaten the sun-baked potato salad can tell you food poisoning is no picnic.

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Karen Hopkin.

 


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1 antibiotic KNJzd     
adj.抗菌的;n.抗生素
参考例句:
  • The doctor said that I should take some antibiotic.医生说我应该服些用抗生素。
  • Antibiotic can be used against infection.抗菌素可以用来防止感染。
2 antibiotics LzgzQT     
n.(用作复数)抗生素;(用作单数)抗生物质的研究;抗生素,抗菌素( antibiotic的名词复数 )
参考例句:
  • the discovery of antibiotics in the 20th century 20世纪抗生素的发现
  • The doctor gave me a prescription for antibiotics. 医生给我开了抗生素。
3 disarm 0uax2     
v.解除武装,回复平常的编制,缓和
参考例句:
  • The world has waited 12 years for Iraq to disarm. 全世界等待伊拉克解除武装已有12年之久。
  • He has rejected every peaceful opportunity offered to him to disarm.他已经拒绝了所有能和平缴械的机会。
4 bugs e3255bae220613022d67e26d2e4fa689     
adj.疯狂的,发疯的n.窃听器( bug的名词复数 );病菌;虫子;[计算机](制作软件程序所产生的意料不到的)错误
参考例句:
  • All programs have bugs and need endless refinement. 所有的程序都有漏洞,都需要不断改进。 来自《简明英汉词典》
  • The sacks of rice were swarming with bugs. 一袋袋的米里长满了虫子。 来自《简明英汉词典》
5 penicillin sMXxv     
n.青霉素,盘尼西林
参考例句:
  • I should have asked him for a shot of penicillin.我应当让他给我打一针青霉素的。
  • Penicillin was an extremely significant medical discovery.青霉素是极其重要的医学发现。
6 toxin hn5wb     
n.毒素,毒质
参考例句:
  • Experts have linked this condition to a build-up of toxins in the body.专家已把这一病症与体内毒素的积累联系起来。
  • Tests showed increased levels of toxin in shellfish.检验表明水生有壳动物的毒素水平提高了。
7 toxins 18c3f40d432ba8dc33bad8fb82873ea8     
n.毒素( toxin的名词复数 )
参考例句:
  • The seas have been used as a receptacle for a range of industrial toxins. 海洋成了各种有毒工业废料的大容器。
  • Most toxins are naturally excreted from the body. 大部分毒素被自然排出体外。 来自《简明英汉词典》
8 bacterial dy5z8q     
a.细菌的
参考例句:
  • Bacterial reproduction is accelerated in weightless space. 在失重的空间,细菌繁殖加快了。
  • Brain lesions can be caused by bacterial infections. 大脑损伤可能由细菌感染引起。
9 lethal D3LyB     
adj.致死的;毁灭性的
参考例句:
  • A hammer can be a lethal weapon.铁锤可以是致命的武器。
  • She took a lethal amount of poison and died.她服了致命剂量的毒药死了。
10 molecule Y6Tzn     
n.分子,克分子
参考例句:
  • A molecule of water is made up of two atoms of hygrogen and one atom of oxygen.一个水分子是由P妈̬f婘̬ 妈̬成的。
  • This gives us the structural formula of the molecule.这种方式给出了分子的结构式。
11 proceedings Wk2zvX     
n.进程,过程,议程;诉讼(程序);公报
参考例句:
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
12 arsenal qNPyF     
n.兵工厂,军械库
参考例句:
  • Even the workers at the arsenal have got a secret organization.兵工厂工人暗中也有组织。
  • We must be the great arsenal of democracy.我们必须成为民主的大军火库。
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