轻松背单词新浪微博 轻松背单词腾讯微博
轻松背单词微信服务号
当前位置:首页 -> 9级英语阅读 - > 巧克力有效成分能止咳
巧克力有效成分能止咳
添加时间:2014-06-30 16:04:26 浏览次数: 作者:未知
Tip:点击数字可快速查看单词解释  
  • An ingredient in chocolate could be used to stop persistent1 coughs and lead to more effective medicines, researchers say. The study found that theobromine, found in cocoa, was nearly a third more effective in stopping persistent coughs than codeine, currently considered the best cough medicine.

    The researchers, from Imperial College London (ICL), said the discovery could lead to more effective cough treatments. Ten healthy volunteers were either given theobromine, codeine or a dummy2 pill during the trial, which also involved Royal Brompton Hospital and St Bartholomew's Hospital.

    The researchers, writing in the online FASEB Journal, said that theobromine worked by suppressing vagus nerve activity, which is responsible for causing coughing. They also found that unlike standard cough treatments, theobromine caused no adverse3 effects on the cardiovascular or central nervous systems, such as drowsiness4.

    辅助阅读

    伦敦帝国学院的科学家发现,巧克力中含有的可可碱成分的止咳效果优于常用止咳药可待因30%以上。从事该研究的彼得·巴内斯教授认为,此发现有望改进现在普遍采用的止咳方法。

    科学家们让10位志愿者分别服用了可可碱、可待因或者安慰剂。为了检验上述三种物质的作用,研究人员让志愿者吸入了可以诱发咳嗽的辣椒素。通过对辣椒素水平进行分析,研究人员发现,服用可可碱的志愿者与服用安慰剂的志愿者相比,前者要吸入浓度高三分之一的辣椒素才能引发咳嗽;服用可待因的志愿者与服用安慰剂的志愿者相比,前者需要吸入的辣椒素浓度要稍高于后者即可引发咳嗽。研究者还表示,与通常的止咳方法不同,可可碱对心血管和中枢神经系统不会产生任何副作用。

     9级    英文科普 
     单词标签: persistent  dummy  adverse  drowsiness 


    点击收听单词发音收听单词发音  

    1 persistent [pəˈsɪstənt] BSUzg   第7级
    adj.坚持不懈的,执意的;持续的
    参考例句:
    • Albert had a persistent headache that lasted for three days. 艾伯特连续头痛了三天。
    • She felt embarrassed by his persistent attentions. 他不时地向她大献殷勤,使她很难为情。
    2 dummy [ˈdʌmi] Jrgx7   第10级
    n.假的东西;(哄婴儿的)橡皮奶头
    参考例句:
    • The police suspect that the device is not a real bomb but a dummy. 警方怀疑那个装置不是真炸弹,只是一个假货。
    • The boys played soldier with dummy swords made of wood. 男孩们用木头做的假木剑玩打仗游戏。
    3 adverse [ˈædvɜ:s] 5xBzs   第7级
    adj.不利的;有害的;敌对的,不友好的
    参考例句:
    • He is adverse to going abroad. 他反对出国。
    • The improper use of medicine could lead to severe adverse reactions. 用药不当会产生严重的不良反应。
    4 drowsiness ['draʊzɪnəs] 420d2bd92d26d6690d758ae67fc31048   第10级
    n.睡意;嗜睡
    参考例句:
    • A feeling of drowsiness crept over him. 一种昏昏欲睡的感觉逐渐袭扰着他。 来自《简明英汉词典》
    • This decision reached, he finally felt a placid drowsiness steal over him. 想到这,来了一点平安的睡意。 来自汉英文学 - 骆驼祥子

    文章评论 共有评论 0查看全部

      会员登陆
      热门单词标签
    我的单词印象
    我的理解: