尼古丁

Answer:I know, but I'm hooked on nicotine.

我知道，但我已对尼古丁上瘾了。

This, inturn, means more smoke per unit volume, and thus more tar and nicotine.

因而，这就意味着每多吸一口空气，就会多吸一口焦油和尼古丁。

A reversed phase ion-pair high performance liquid chromatographic method was developed for the simultaneous determination of nicotine and cotinine in human hair.

以庚烷磺酸钠为离子对试剂，建立了同时测定头发中尼古丁和可天宁含量的反相离子对高效液相色谱方法。

TOKYO - A team of Japanese scientists have found a gene closely linked to nicotine addiction, which could lead to more effective ways for smokers to kick the habit, a Japanese daily said on Wednesday.

日本媒体12月6日表示，一个由该国科学家组成的研究团队近日在人体内找到了与尼古丁成瘾存在密切联系的基因，这一发现可以引领那些渴望杜绝该种坏习惯的烟民采用更为有效的戒烟方法。

TOKYO - A team of Japanese scientists have found ageneclosely linked to nicotine addiction, which could lead tomoreeffective ways for smokers to kick the habit, a Japanese dailysaidon Wednesday.

日本媒体12月6日表示，一个由该国科学家组成的研究团队近日在人体内找到了与尼古丁成瘾存在密切联系的基因，这一发现可以引领那些渴望杜绝该种坏习惯的烟民采用更为有效的戒烟方法。

Different people metabolize nicotine at different rates.

不同的人代谢尼古丁有不同的速度。

A new technique for analyzing microgram and submicrogram amount of nicotine and cotinine biological fluids is developed.

作者研制了一项新技术分析尼古丁和可铁宁的生物液微克和亚微克量。

"I thought, I must confess, that these tales, were inventions of the Middle Ages."

我想，我必须尼古丁含量低的香烟。

Results:①In normal extracellular solution, the non-selective cholinergic agonist acetylcholine and the muscarinic agonist muscarine both caused the increace of [Ca2+]i in separately 21 out of 25 and 14 out of 18 VHCs I, while only 3 out of 20 and 2 out of 16 VHCs I had a weak increase of [Ca2+]i if investigated in calcium free extracellular solution; nicotine could increase the [Ca2+]i in 7 out of 32 VHCsⅠonly at enough high concentration(up to 10 mmol/L) in normal extracellular solution, this [Ca~(2+)]_i increase by nicotine at high concentration could not be investigated if at calcium free solution.

结果①非选择性胆碱能受体激动剂乙酰胆碱、M型胆碱能受体激动剂毒蕈碱在正常细胞外液中均可引起大部分(21/25， 14/18)单离VHCⅠ[Ca~(2+)]_i的升高，但无钙外液中ACh、muscarine仅使少部分(3/20，2/16)VHCⅠ[Ca~(2+)]_i升高且作用减弱；正常外液中，N型受体激动剂尼古丁仅在高浓度(≥10 mmol/L)时引起部分(7/32) VHCⅠ[Ca~(2+)]_i升高，在低浓度时对胞内钙离子浓度影响不明显，无钙外液中，10 mmol/L nicotine对胞内钙离子浓度影响不明显。

"The interaction of tobacco, and especially nicotine, with brain chemistry is a fascinating area that we're just beginning to understand, especially when it comes to correlating neurochemistry with behavior," said study leader Jon-Kar Zubieta, a psychiatrist and neuroscientist at the university.

该大学的精神病学家和科学家，也是研究的领导人Jon-Kar Zubieta说：烟草的交互作用，特别是尼古丁，和脑部的化学物质是一块吸引人的领域，我们刚刚开始了解其中的奥妙，特别是到神经化学和行为相关联这块。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。