nicotine

名词尼古丁; [化]烟碱

1. 烟碱：从烟叶中提取烟碱 烟碱 (nicotine)又名尼古丁,是烟草生物碱 (nicotiana alkaloids)(包括12种以上单一成分)的主要成分,于1928年首次被分离出来. 烟碱具有二个含氮环:吡啶环和吡咯烷环,天然产烟碱为左旋体. 烟碱在商业上用作

2. 尼古丁：目的 尼古丁(Nicotine)是烟草中的主要生物碱,是香烟中的对人体有害的主要生物活性物质. 已经公认,宫内暴露尼古丁会对胎儿大脑产生损害,改变突触功能,进而引起行为异常,这种损害会延续至成年. 但是,

3. 菸碱(尼古丁)：世界卫生组织(WTO )研究指出,烟碱尼古丁(Nicotine)实际上是一种兴奋剂,是强成瘾药物,吸烟的成产瘾机理与吸毒完全一样,只是程序略轻而已. 台湾天然植物精萃研发中心程先生研究发现:常绿亚乔木果实(山楂、乌梅、菠萝、柠檬等)经高倍浓缩,

1. 尼古丁;烟碱
    Nicotine is the substance in tobacco that people can become addicted to.

    e.g. Nicotine produces a feeling of well-being in the smoker...
           尼古丁给吸烟者带来一种愉悦的感觉。
    e.g. Nicotine marks stained his chin and fingers.
           尼古丁渍染黄了他的下巴和手指。

1. She said almost 60 per cent of male medical professionals in China are addicted to nicotine.

2. " Nicotine patches are our most popular cessation aid, " said a salesperson at a pharmacy in Beijing's Chaoyang district.

3. Electronic cigarettes containing nicotine and marketed as tobacco cessation products are regarded as pharmaceutical products.

4. Obama was often observed on the presidential campaign trail chewing Nicorette gum, which helps ease the craving for nicotine.

5. 911查询·英语单词

5. Nicotine is one of the most addictive substances known, and it is common for smokers to suffer repeated relapses when they try to quit.

6. This means that in the absence of addictive levels of nicotine in their cigarettes, most young smokers would ultimately quit.

7. Some even say higher cigarette prices can hardly control smoking because smokers will continue to " enjoy their tar and nicotine " regardless of the price.

8. The brain is unfortunately not adequately aware that the positive feedback is not a direct result of nicotine being inhaled.

9. A heating coil vaporizes the nicotine into a fine mist, which is then inhaled.

10. danci.911cha.com

10. " The changes suggest the brain is particularly vulnerable to the effects of nicotine during adolescence, " research leader Leslie Jacobsen of Yale University School of Medicine said.

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