查询词典 nicotine

In order to verify nicotine effect to heart of rat , analyzing the electrograph Based on these results , it was demonstrated that nicotine can induce to release acetylcholine locally or act on muscarinic cholinoreceptor controlled by parasympathetic nerve .

为进一步确定烟碱对大鼠心脏的作用，对描记烟碱作用后大鼠心电图进行分析，发现烟碱能引起大鼠心电图显示较长的QT间期，增加了PR间期及T波面积，与肾上腺素或去甲肾上腺素引起的QT间期延长相似，且能被M受体阻断剂阿托品所阻断，说明烟碱能够诱导局部释放乙酰胆碱或者作用于部分副交感神经控制的毒蕈碱受体。

Because nicotine is so similar to acetylcholine, and binds to cholinergic receptors, nicotine in excess produces the same overstimulation and toxicity.

绑定到烟碱性的胆碱能受体的尼古丁越多，随后乙酰胆碱就释放的越多，更加自由地激活其他部分的胆碱能受体。

The aim of the present study was to study the effect of nicotine on ghrelin and the growth hormone secretagogue receptor expression, the effect of ghrelin on vascular cell adhesion molecule-1(VCAM-1) and interleukin-8 (IL-8) expression in nicotine incubated human umbilical vein endothelial cell,and the possible signaling transduction mechanisms associated with PKC, p38 MAPK and NF-κB.

本实验通过观察ghrelin对尼古丁所致HUVEC VCAM-1及IL-8表达变化过程中PKC、p38 MAPK及NF-κ3的活性变化，并应用PKC、p38 MAPK及NF-κB的特异性抑制剂chelerytherine chloride、SB203580、PDTC，探讨ghrelin阻断尼古丁引起内皮细胞功能紊乱致AS作用的信号转导机制。

Meanwhile, the Iron Goddess of Mercy of caffeine can enhance liver metabolism of drugs, promote blood circulation to the body of nicotine in the blood from the urine excretion, reduce and eliminate the side effects of nicotine.

同时，铁观音中的咖啡碱能提高肝脏对药物的代谢能力，促进血液循环，把人体血液中的尼古丁从小便排泄出去，减轻和消除尼古丁带来的副作用。

There was no significant difference in total alkaloid levels among different cigarette samples in the same year, while nicotine and nornicotine contents varied reversely, resulting in a ladder of percent nicotine c...

同一年份的卷烟样品间总生物碱含量无显著差异，烟碱含量和降烟碱含量呈相反趋势变化，从而形成样品间烟碱转化率的梯度差异。

The character of flower colour and high nicotine conversion inherited steadily,the average nicotine content of their offsprings decreased,while nornicotine content increased significantly.

通过对发现的5株白肋烟B37花色突变株后代的连续观察与研究，结果表明，5株白花突变株当代均为高烟碱转化株；随着世代的增加，白花后代群体花色遗传稳定，高转化率性状更趋于纯合；烟株群体的平均烟碱含量明显下降，降烟碱则明显上升，烟株群体生物碱表现为以降烟碱为主。

Tobacco Alkaloid Nicotine Nornicotine Percent nicotine conversion Sensory evaluation Cigarette smoke Tobacco-specific nitrosamines

烟草；生物碱；烟碱；降烟碱；烟碱转化率；感官评吸；烟气；烟草特有亚硝胺

Using nicotine silicotungstate as active material, a PVC membrane nicotine ion selective electrode was prepared.

尼古丁又称烟碱，是烟草中重要的生物碱，对人体有强烈的生理作用。

The results indicated as pH values in the range from 4.50 to 7.50, the volume and dry weight of root increased as pH values increased, as well as AAAR,TAAR. The relationship of nicotine and total nitrogen accumulation with pH values was parabola,the functions were Y=-61.429X2+391.17X-162.8 (F=l 8.45), Y=-24.3X2+154.88X+52.7 (F=14.40**) respectively. When pH value got rise to 7.50, the accumulation of nicotine and total nitrogen attained the highest .

主要研究结果如下： 1 不同pH值(4.50、5.50、6.50、7.50、8.50)对烤烟根系发育、根系吸收面积以及对烟叶烟碱、总氮、蛋白质和多酚物质积累影响的研究结果表明pH值在4.50～7.50范围内，根系体积和干重都随着pH值上升而增加，AAAR、TAAR也随着升高，烟叶中烟碱、总氮累积量随着pH值上升而增加，烟碱和总氮累积量与pH之间呈抛物线关系，关系式分别为Y=-61.429X~2+391.17X-162.8，F=18.45~；Y=-24.3X~2+154.88X+52.7，F=14.40~，pH值对烟碱和总氮累积量的影响存在极显著差异，当pH值升至7.50时，烟碱和总氮累积量达到最高值。

Due to decreasing nicotine content without influencing the original quality in tobacco fermentation, reducing the hazards to human health, microbes catabolizing nicotine has superduper potential for application.

有些微生物能在烟叶醇化过程中代谢尼古丁，降低尼古丁的含量，而不影响烟叶原有的品质，并降低其对人类健康的危害。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。