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SSS 2009-01-08

时间:2010-05-17 01:57来源:互联网 提供网友:木渐浅。   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute.

 

Aspirin1 is a popular painkiller2, 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 previously3 observed that people can have salicylic acid in their blood even if they haven’t recently swallowed an aspirin. Vegetarians4 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 precursor5 molecule6 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 calcium7 released at the site of an infection tells plants to ramp8 up production of the protective compound. Just Mother Nature’s way of saying, “Make two aspirin and call me when you flower.”

 

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

 


点击收听单词发音收听单词发音  

1 aspirin 4yszpM     
n.阿司匹林
参考例句:
  • The aspirin seems to quiet the headache.阿司匹林似乎使头痛减轻了。
  • She went into a chemist's and bought some aspirin.她进了一家药店,买了些阿司匹林。
2 painkiller eKMx4     
n.止痛药
参考例句:
  • I shall persuade him to take the painkiller.我将说服他把药吃下去。
  • The painkiller only provides him a short respite from his pain.止痛药仅仅让他在疼痛中有短暂的疏解。
3 previously bkzzzC     
adv.以前,先前(地)
参考例句:
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
4 vegetarians 92ca2254bb61eaa208608083177e4ed9     
n.吃素的人( vegetarian的名词复数 );素食者;素食主义者;食草动物
参考例句:
  • Vegetarians are no longer dismissed as cranks. 素食者不再被视为有怪癖的人。
  • Vegetarians believe that eating meat is bad karma. 素食者认为吃肉食是造恶业。
5 precursor rPOx1     
n.先驱者;前辈;前任;预兆;先兆
参考例句:
  • Error is often the precursor of what is correct.错误常常是正确的先导。
  • He said that the deal should not be seen as a precursor to a merger.他说该笔交易不应该被看作是合并的前兆。
6 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。
7 calcium sNdzY     
n.钙(化学符号Ca)
参考例句:
  • We need calcium to make bones.我们需要钙来壮骨。
  • Calcium is found most abundantly in milk.奶含钙最丰富。
8 ramp QTgxf     
n.暴怒,斜坡,坡道;vi.作恐吓姿势,暴怒,加速;vt.加速
参考例句:
  • That driver drove the car up the ramp.那司机将车开上了斜坡。
  • The factory don't have that capacity to ramp up.这家工厂没有能力加速生产。
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TAG标签:   SSS  salicylic
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