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 nicotine ['nikәti:n]   添加此单词到默认生词本
n. 烟碱, 尼古丁

[化] 烟碱; 尼古丁

[医] 烟硷




    nicotine
    [ noun ]
    an alkaloid poison that occurs in tobacco; used in medicine and as an insecticide
    <noun.substance>


    Nicotine \Nic"o*tine\ (? or ?), n. [F. nicotine. See
    {Nicotian}.] (Chem.)
    An alkaloid which is the active principle of tobacco
    ({C10H14N2}). It occurs in tobacco plants ({Nicotiana
    tabacum} and {Nicotiana rusticum}) to the extent of 2 to 8%,
    in combination with malic acid or citric acid. It is a
    colorless, transparent, oily liquid, having an acrid odor,
    and an acrid burning taste. It is intensely poisonous. The
    apparently addictive effects of tobacco smoking have been
    ascribed largely to the effect of nicotine, and the
    controlled administration of nicotine on various forms has
    been used as a technique for assisting efforts to stop the
    smoking habit. --Ure.
    [1913 Webster +PJC]

    1. Rats getting nicotine gain weight more slowly than ordinary rats; when the nicotine is stopped, their weight shoots up dramatically.
    2. Rats getting nicotine gain weight more slowly than ordinary rats; when the nicotine is stopped, their weight shoots up dramatically.
    3. The heat vaporized the glycerin and nicotine in the dried tobacco as well as the flavorings.
    4. More than three-quarters of people trying to quit smoking were able to do so for six weeks with the help of nicotine patches, researchers at the Mayo Clinic reported Friday.
    5. But whenever they rinsed with coffee or the cola, there was only an insignificant rise in blood nicotine levels.
    6. Philip Morris decided to make the changes slowly, to avoid shocking consumers with a sudden shift in taste. Moreover, company officials insist they won't have problems adjusting to the tar and nicotine limits.
    7. Wong's conclusions, presented at the 40th annual meeting of the American Society for Pharmacology and Experimental Therapeutics, contradict the traditional scientific belief that nicotine stimulates brain cells.
    8. A bus arrives bound for Monterrey, but thoughts of bravery are dispelled by a whiff of its kerosene and nicotine interior.
    9. Are US tobacco companies deliberately manipulating the amount of nicotine in cigarettes to keep the nation's 46m smokers addicted?
    10. In November, Alza won regulatory approval for a nicotine patch, marketed by Marion Merrell Dow Inc., that could be a big seller.
    11. Then, doctors are asked to help patients willing to try to quit by setting a quit date, giving the patient self-help material and prescribing nicotine gum if needed for heavier smokers.
    12. The company has sought FDA approval to sell the patch, which secretes nicotine into the body via the skin.
    13. Previously he has threatened to regulate cigarettes as drugs if it could be shown that manufacturers intend people to buy them to satisfy a nicotine addiction.
    14. But Mr. Vimond adds that the smokeless cigarette is "kind of a Rube Goldberg" contraption, with a carbon tip on one end and flavor beads, which provide most of the cigarette's nicotine, in an aluminum casing inside the cigarette.
    15. Cummings said 91 percent of the Buffalo-area non-smokers interviewed over a year had traces of cotinine, a breakdown product of nicotine, in their urine.
    16. A spokesman for the nation's tobacco farmers blasted the U.S. surgeon general on Monday and said his report comparing nicotine to addictive drugs like heroin and cocaine was nonsense.
    17. The researchers said many smokers may fail to quit smoking because they inadvertently render the nicotine gum ineffective by consuming slightly acidic food and drinks at the same time they chew the gum.
    18. A nicotine patch developed by Cygnus and Kabi Pharmacia AB will be marketed in the U.S. and Canada by Warner-Lambert Co. The product, to be used in smoking-cessation treatments, hasn't yet received regulatory approvals.
    19. The Federal Trade Commission, in a move to save money, said it will end regular testing of cigarette tar and nicotine levels and will rely on industry data instead.
    20. The report also said that although 30 percent of the adult population smokes, there are detectable levels of cotinine, a metabolic product of nicotine, detected in the blood, saliva and urine of 50 to 75 percent of nonsmokers tested.
    21. Unwed mothers, of course, are not the only parents to engage in practices prejudicial to infant health, nor are nicotine and "tar" the only hazardous substances to which a fetus can be exposed.
    22. The availability of these very-low nicotine cigarettes may prove most effective at reminding smokers of the risks of standard cigarettes.
    23. Separately, Advanced Tobacco said it is negotiating with a U.S. company on the application of its nicotine technology for potential smoking-deterrent products.
    24. Smokers looking to kick the habit have enlisted any number of weapons in the battle: nicotine chewing gum, hypnosis, even electric shock treatments.
    25. A federal judge lifted that injunction in December, allowing the company to begin selling the patches, which leach nicotine into the skin in gradually decreasing doses over ten weeks to wean smokers from cravings for the drug.
    26. The pouch contains beads of tobacco extracts, including nicotine and other flavorings, and is a dazzling piece of aerosol technology, according to some specialists who have studied it.
    27. Researchers say smokers unconsciously learn to "fine-tune" transmitters that control emotions by taking nicotine for stimulation when they feel down or to soothe themselves when anxious.
    28. Other research suggests that nicotine's chemical ghost haunts the body for months, even though nicotine itself remains in the blood for only a few hours after smoking.
    29. Other research suggests that nicotine's chemical ghost haunts the body for months, even though nicotine itself remains in the blood for only a few hours after smoking.
    30. About 1 milligram of nicotine is absorbed through the skin every hour so smokers are better able to cope with the withdrawal symptoms associated with quitting smoking.
    nicotine
    nicotine bitartrate
    nicotine cholinergic ...
    nicotine content
    nicotine ferroprotopo...
    nicotine group
    nicotine hemochromogen
    nicotine hydrochloride
    nicotine salicylate
    nicotine sulfate
    nicotine sulphate
    nicotine tartrate
    nicotine-resistant
    nicotinergic receptor
    nicotinic
    nicotinic acid
    nicotinic acid amide
    nicotinic acid amide ...
    nicotinic acid benzyl...
    nicotinic acid hydrazide
    nicotinic acid hydroc...
    nicotinic acid monoet...
    nicotinic acid picrate
    nicotinic acid(NA)
    nicotinic action
    nicotinic alcohol
    nicotinic amide
    nicotinic effect
    nicotinic receptor
    nicotinic stomatitis
    nicotinism
    nicotinize
    nicotinolytic
    nicotinoyl
    nicotinoylglycine
    nicotinoylhydrazine
    nicotinoylisoramanon
    nicotinuric acid
    nicotinyl alcohol
    nicotinylmorpholine
    nicotion
    nicotoine
    nicotyrin
    nicotyrine
    nicouic acid
    nicoulin
    nicouline
    nicouluine
    nicoumalone
    nicovel
    nicovitol
    nicoxin
    nicozide
    Nicrite
    Nicrobraz
    nicrocytase
    nicrome resistor grid
    nicrophytic
    Nicrosilal
    nicrosilal spheronic
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