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nicotine    音標拼音: [n'ɪkət,in]
n. 煙堿

煙鹼

nicotine
n 1: an alkaloid poison that occurs in tobacco; used in medicine
and as an insecticide

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]

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  • Nicotine - Wikipedia
    Nicotine is a naturally produced alkaloid in the nightshade family of plants (most predominantly in tobacco and Duboisia hopwoodii) [8] and is widely used recreationally as a stimulant and anxiolytic As a pharmaceutical drug, it is used for smoking cessation to relieve withdrawal symptoms
  • Nicotine: How It Works, Uses, Risks, Benefits - Verywell Health
    Nicotine is an addictive organic compound found in tobacco plants It’s the chemical that makes smoking cigarettes, chewing tobacco, and vaping so hard to quit Nicotine is associated with many health risks and problems Tobacco is linked to cancer of the mouth, throat, and lungs
  • What Nicotine Does to Your Body - Verywell Mind
    Nicotine is extremely addictive, and when used regularly, your body and mind learn to expect a certain amount of nicotine each day If you don't fulfill these cravings, withdrawal symptoms can be intense You can quickly build a tolerance to nicotine, needing more to reach the desired effect
  • Nicotine: Facts, effects, and dependency - Medical News Today
    Nicotine is a substance found in all tobacco products and some e-cigarette liquids It is a highly addictive substance that is naturally present in the tobacco plant Laboratories can also
  • Nicotine dependence - Symptoms and causes - Mayo Clinic
    Nicotine dependence happens when your body craves nicotine and you can't stop using it Nicotine is the chemical in smoked tobacco that causes the urge to smoke The chemical brings on pleasant feelings, but these effects are short-lived
  • Nicotine Is Why Tobacco Products Are Addictive | FDA
    Nicotine is what keeps people using tobacco products However, it’s the thousands of chemicals contained in tobacco and tobacco smoke that make tobacco use so deadly
  • Nicotine and Tobacco: Effects, Addiction, and Treatment - WebMD
    Have you tried, and failed, to stop smoking? Is smokeless tobacco or vaping your crutch? You might be addicted to nicotine Learn more about the causes, symptoms, and treatments
  • Nicotine | Tobacco, Addiction, Poison | Britannica
    Nicotine is the chief addictive ingredient in the tobacco used in cigarettes, cigars, and snuff In its psychoactive effects, nicotine is a unique substance with a biphasic effect; when inhaled in short puffs it has a stimulant effect, but when smoked in deep drags it can have a tranquilizing effect
  • What Is Nicotine? Facts, Effects Uses – Ezee
    Nicotine is a well-known substance primarily associated with tobacco use, but there is much more to it than its effects on the body This article explores what nicotine is, where it comes from, its history, and its role in modern products and research
  • Nicotine - American Lung Association
    Nicotine is the addictive drug in tobacco products Cigarettes, cigars, smokeless tobacco and nearly all e-cigarettes contain nicotine The tobacco industry continuously develops and markets new nicotine-containing products





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