电子香烟可能同样有瘾
文章来源:未知 文章作者:enread 发布时间:2015-07-23 06:50 字体: [ ]  进入论坛
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Electronic cigarettes or "e-cigs" have been touted1 as a tool smokers2 can use to wean themselves off of traditional cigarettes, which many believe are more harmful than their "e" counterparts. But because e-cig liquid also contains nicotine3 and emits carcinogens, is that perception really true? One team now reports in the ACS journal Chemical Research in Toxicology that much of the nicotine in e-cigarettes is the addictive4 form of the compound. Although e-cigs don't burn tobacco, they heat and vaporize a liquid that contains nicotine, flavorings and other substances. Out of concern for the potential effects that inhaling5 this mixture could have on the health of young people, many states have banned their sale to minors6. Some experts say the nicotine content could lead users to become addicted7 to e-cigs, or that it could even serve as a gateway8 to conventional cigarettes and other drugs. But not all nicotine is created equal, and studies had yet to investigate what kind of nicotine was in the liquids. Out of three forms, scientists believe "free-base" nicotine is the only one that gets absorbed by the body, making it the most addictive kind. Najat Saliba and colleagues wanted to find out which nicotine forms are in e-cigs. 
 
The researchers tested commercial samples of liquids made for the devices and found that, by and large, the nicotine was in the most addictive form. They also determined9 that the concentration of nicotine varied10 and often didn't match the concentrations the labels claimed.


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1 touted 00151f908b31d984fd20d8b48dba34f3     
v.兜售( tout的过去式和过去分词 );招揽;侦查;探听赛马情报
参考例句:
  • She's being touted as the next leader of the party. 她被吹捧为该党的下一任领导人。
  • People said that he touted for his mother and sister. 据说,他给母亲和姐姐拉生意。 来自辞典例句
2 smokers d3e72c6ca3bac844ba5aa381bd66edba     
吸烟者( smoker的名词复数 )
参考例句:
  • Many smokers who are chemically addicted to nicotine cannot cut down easily. 许多有尼古丁瘾的抽烟人不容易把烟戒掉。
  • Chain smokers don't care about the dangers of smoking. 烟鬼似乎不在乎吸烟带来的种种危害。
3 nicotine QGoxJ     
n.(化)尼古丁,烟碱
参考例句:
  • Many smokers who are chemically addicted to nicotine cannot cut down easily.许多有尼古丁瘾的抽烟人不容易把烟戒掉。
  • Many smokers who are chemically addicted to nicotine cannot cut down easily.许多有尼古丁瘾的抽烟人不容易把烟戒掉。
4 addictive hJbyL     
adj.(吸毒等)使成瘾的,成为习惯的
参考例句:
  • The problem with video game is that they're addictive.电子游戏机的问题在于它们会使人上瘾。
  • Cigarettes are highly addictive.香烟很容易使人上瘾。
5 inhaling 20098cce0f51e7ae5171c97d7853194a     
v.吸入( inhale的现在分词 )
参考例句:
  • He was treated for the effects of inhaling smoke. 他因吸入烟尘而接受治疗。 来自辞典例句
  • The long-term effects of inhaling contaminated air is unknown. 长期吸入被污染空气的影响还无从知晓。 来自互联网
6 minors ff2adda56919f98e679a46d5a4ad4abb     
n.未成年人( minor的名词复数 );副修科目;小公司;[逻辑学]小前提v.[主美国英语]副修,选修,兼修( minor的第三人称单数 )
参考例句:
  • The law forbids shops to sell alcohol to minors. 法律禁止商店向未成年者出售含酒精的饮料。 来自《简明英汉词典》
  • He had three minors this semester. 这学期他有三门副修科目。 来自《简明英汉词典》
7 addicted dzizmY     
adj.沉溺于....的,对...上瘾的
参考例句:
  • He was addicted to heroin at the age of 17.他17岁的时候对海洛因上了瘾。
  • She's become addicted to love stories.她迷上了爱情小说。
8 gateway GhFxY     
n.大门口,出入口,途径,方法
参考例句:
  • Hard work is the gateway to success.努力工作是通往成功之路。
  • A man collected tolls at the gateway.一个人在大门口收通行费。
9 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。
10 varied giIw9     
adj.多样的,多变化的
参考例句:
  • The forms of art are many and varied.艺术的形式是多种多样的。
  • The hotel has a varied programme of nightly entertainment.宾馆有各种晚间娱乐活动。
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