美国科学60秒 SSS 2013-05-28
时间：2018-12-24 作者：英语课 分类：Scientific American(五)月
We've discovered that Vitamin C kills MT cells. TB research William Jacob, with the Albert Einstein College of Medicine in the Bronx. And in fact it works not only on the multidrug-resistent strains but totally drug-resistent strains as well. Jacobs was studying whether the TB drug isoniazid was being inactived by the prescence of a particular amino-acid cysteine, which in chemical terms access reducing agent by donating electrons. So we added these with the isoniazid expecting that we'd get resistance. And to our surprise it acutally led to sterilization 1. This reducing agent acutally induced free radicals 2. Free radicals are highly reactive chemical entities 3 that can damage cells. And with the free radicals that were killing 4 the TB, we decided 5 to try another reducing agent-Vitamin C. We solved just like the other reducing agent it in combination isoniazid sterilized 6 culture. Even more surprisingly, was when we just had Vitamin C alone, we discovered that Vitamin C kills tuberlosis. We've only been able to demonstrate this in a test tube, and we don't know if it will work in humans. But before this study, you wouldn't even thought about trying in humans.
- Sterilization by filtration is subject to one major theoretical limitation. 过滤灭菌具有一个理论上的局限性。 来自辞典例句
- Sterilization is a treatment that frees the treated object of all living organisms. 灭菌处理是从处理对象排除一切生活的生物。 来自辞典例句
- Some militant leaders want to merge with white radicals. 一些好斗的领导人要和白人中的激进派联合。 来自《简明英汉词典》
- The worry is that the radicals will grow more intransigent. 现在人们担忧激进分子会变得更加不妥协。 来自辞典例句
- Our newspaper and our printing business form separate corporate entities. 我们的报纸和印刷业形成相对独立的企业实体。
- The North American continent is made up of three great structural entities. 北美大陆是由三个构造单元组成的。
- Investors are set to make a killing from the sell-off.投资者准备清仓以便大赚一笔。
- Last week my brother made a killing on Wall Street.上个周我兄弟在华尔街赚了一大笔。
- This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
- There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。
- My wife was sterilized after the birth of her fourth child. 我妻子生完第4个孩子后做了绝育手术。 来自辞典例句
- All surgical instruments must be sterilized before use. 所有的外科手术器械在使用之前，必须消毒。 来自辞典例句