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60秒科学:Cleopatra's Eyeliner: Peeper Health Keeper

时间:2010-10-18 03:00来源:互联网 提供网友:princetngirl   字体: [ ]
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Cleopatra's Eyeliner: Peeper Health Keeper
A study in the journal Analytical1 Chemistry finds that the black eyeliner worn by ancient Egyptians may have had properties that helped ward2 off eye-damaging bacterial3 infections. Cynthia Graber reports

When you picture ancient Egyptian beauties such as Queen Nefertiti or Cleopatra, they’re probably wearing dramatic black eyeliner. Ancient Egyptians believed that eye makeup4 had properties bestowed5 by the gods protected the wearers from illness. Modern scientists determined6 that the makeup contains often-harmful lead, so they discounted any beneficial effects. But according to research published in the journal Analytical Chemistry, the eye makeup may indeed have prevented disease.

Scientists analyzed7 52 different samples from ancient Egyptian makeup found at the Louvre. They identified four different lead-based substances, two of which were man-made, not natural. They then applied8 the substances to a culture of human cells. And the cells experienced a 240 percent increase in the production of nitric oxide9, which is known to jump start the immune system.

The ancient marshy10 Nile would have hosted many eye disease–causing bacteria. Application of the makeup may have revved11 up cells’ immunity12 and protected against infection. The chemical compounds were no doubt used initially13 based on appearance. But then wearers noticed they weren’t getting eye infections. The gods got praised, but it was ancient chemists who deserved the credit.
 


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1 analytical lLMyS     
adj.分析的;用分析法的
参考例句:
  • I have an analytical approach to every survey.对每项调查我都采用分析方法。
  • As a result,analytical data obtained by analysts were often in disagreement.结果各个分析家所得的分析数据常常不一致。
2 ward LhbwY     
n.守卫,监护,病房,行政区,由监护人或法院保护的人(尤指儿童);vt.守护,躲开
参考例句:
  • The hospital has a medical ward and a surgical ward.这家医院有内科病房和外科病房。
  • During the evening picnic,I'll carry a torch to ward off the bugs.傍晚野餐时,我要点根火把,抵挡蚊虫。
3 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。
4 makeup 4AXxO     
n.组织;性格;化装品
参考例句:
  • Those who failed the exam take a makeup exam.这次考试不及格的人必须参加补考。
  • Do you think her beauty could makeup for her stupidity?你认为她的美丽能弥补她的愚蠢吗?
5 bestowed 12e1d67c73811aa19bdfe3ae4a8c2c28     
赠给,授予( bestow的过去式和过去分词 )
参考例句:
  • It was a title bestowed upon him by the king. 那是国王赐给他的头衔。
  • He considered himself unworthy of the honour they had bestowed on him. 他认为自己不配得到大家赋予他的荣誉。
6 determined duszmP     
adj.坚定的;有决心的
参考例句:
  • I have determined on going to Tibet after graduation.我已决定毕业后去西藏。
  • He determined to view the rooms behind the office.他决定查看一下办公室后面的房间。
7 analyzed 483f1acae53789fbee273a644fdcda80     
v.分析( analyze的过去式和过去分词 );分解;解释;对…进行心理分析
参考例句:
  • The doctors analyzed the blood sample for anemia. 医生们分析了贫血的血样。 来自《简明英汉词典》
  • The young man did not analyze the process of his captivation and enrapturement, for love to him was a mystery and could not be analyzed. 这年轻人没有分析自己蛊惑著迷的过程,因为对他来说,爱是个不可分析的迷。 来自《简明英汉词典》
8 applied Tz2zXA     
adj.应用的;v.应用,适用
参考例句:
  • She plans to take a course in applied linguistics.她打算学习应用语言学课程。
  • This cream is best applied to the face at night.这种乳霜最好晚上擦脸用。
9 oxide K4dz8     
n.氧化物
参考例句:
  • Oxide is usually seen in our daily life.在我们的日常生活中氧化物很常见。
  • How can you get rid of this oxide coating?你们该怎样除去这些氧化皮?
10 marshy YBZx8     
adj.沼泽的
参考例句:
  • In August 1935,we began our march across the marshy grassland. 1935年8月,我们开始过草地。
  • The surrounding land is low and marshy. 周围的地低洼而多沼泽。
11 revved a5e14af176543ac9ad2bb089d5b9f39f     
v.(使)加速( rev的过去式和过去分词 );(数量、活动等)激增;(使发动机)快速旋转;(使)活跃起来
参考例句:
  • The taxi driver revved up his engine. 出租车司机把发动机发动起来。
  • The car revved up and roared away. 汽车发动起来,然后轰鸣着开走了。 来自《简明英汉词典》
12 immunity dygyQ     
n.优惠;免除;豁免,豁免权
参考例句:
  • The law gives public schools immunity from taxation.法律免除公立学校的纳税义务。
  • He claims diplomatic immunity to avoid being arrested.他要求外交豁免以便避免被捕。
13 initially 273xZ     
adv.最初,开始
参考例句:
  • The ban was initially opposed by the US.这一禁令首先遭到美国的反对。
  • Feathers initially developed from insect scales.羽毛最初由昆虫的翅瓣演化而来。
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TAG标签:   60秒科学  Cleopatra  60秒科学  Cleopatra
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