60s Science---From everyday collection to environmental protection, think Green!

阿泰UID：209473

January 8, 2009 Body Makes Own Aspirin Compound

Aspirin is a popular painkiller, and chances are you have some in your medicine chest right now. You might even have some in your flesh-and-blood, put-a-shirt-on-it chest. Because a new study suggests that humans can make their own salicylic acid, which forms the bulk of aspirin’s active ingredient.

Scientists at Scotland’s National Health Service previously observed that people can have salicylic acid in their blood even if they haven’t recently swallowed an aspirin. Vegetarians have really high concentrations, which makes sense, given that plants make salicylic acid, so fruits and veggies are full of it. But their recent study suggests that not all of the chemical comes from the diet, because humans can take a precursor molecule and turn it into salicylic acid—results published in the Journal of Agricultural and Food Chemistry.

The researchers say that people might make salicylic acid to fight inflammation or disease…which would also make sense…because plants make the stuff to fight off infections. In fact, a recent study published online in the journal Nature shows how calcium released at the site of an infection tells plants to ramp up production of the protective compound. Just Mother Nature’s way of saying, “Make two aspirin and call me when you flower.”

难词： salicylic acid

有问题：
1什么是flesh-and-blood, put-a-shirt-on-it chest.
2“Make two aspirin and call me when you flower.” 这个aspirin为啥不加s

梦想在望2008UID：2546295

楼主 如果我没有ITUNE在电脑里 怎么半》？谢谢

阿泰UID：209473

pls see here

http://www.sciam.com/podcast/podcasts.cfm?type=60-second-science

梦想在望2008UID：2546295

多谢！

bluebird188UID：2285328

salicylic acid是水杨酸，版主另两个问题我也不会。Make two aspirin and call me when you flower这应该是个谚语吧，准确的中文意思为啥。才开始准备听这个合不合适？

阿泰UID：209473

我列出来的难词，是一般在T词典中很少收录但是考试机率比较大的生词:funk:

阿泰UID：209473

January 9, 2009 Male and Female Mosquitoes Synchronize Buzz

Have you ever turned off your lights and heard [mosquito buzz]? To you it’s a sound that signals bites in the night. But to a male mosquito it’s a love song, produced by a female seeking a mate. Now scientists from Cornell University find that males who answer that call join in the serenade. And the two sing in harmony as they check each other out. [Mosquitoes buzzing.]

Working with Aedes aegypti mosquitoes—the pests that carry dengue fever—the scientists tethered individuals to a special insect pin and allowed them to fly past a potential mate. They found that females on their own whine at a frequency of 400 Hertz. Whereas single males buzz at about 600. But when the two come together, they perform a duet in which the beat of their wings reaches a frantic1200 hertz. [Tone.] Isn’t it beautiful? Mosquitoes seem to think so. Which is a surprise, because researchers had previously thought that female mosquitoes were deaf. But the Cornell scientists found that mosquito ears are good up to 2000 hertz, results published in the January 9th issue of Science. Maybe that harmonizing could be exploited for controlling mosquito populations. Releasing into the wild males that can’t sing could be a real buzz-kill.

难词：serenade dengue fever

glamorouskyUID：2459211

1 血肉之躯  第二个是否表示包裹胸腔的肌肉 两个都是指人体
2 plural ：aspirin or aspirins

阿泰UID：209473

1第一个意思我知道，第二个是啥用法

glamorouskyUID：2459211

我理解的是包裹胸腔的 那不就是血肉么 也就是说也是血肉之躯的意思

阿泰UID：209473

那为什么两个形容词一起用？

阿泰UID：209473

还是一个意思

glamorouskyUID：2459211

为什么不捏~~
for instance 您是一个好问的，问题多多的人     两个adj喜欢在一起就让他们在一起啊

阿泰UID：209473

;d:

abdmenUID：2536727

难词是考试几率比较大的词？
那朕不是要撞墙去了？
ibt语言水平考试，不会有很怪癖的词，即使有也不影响做题的..