查询词典 nicotine

Right now, the general consensus is that the problem with cigarettes is tar and that nicotine is safe.

现在，一般的共识是，这一问题与香烟焦油及尼古丁是安全的。

The correlation of the total nitrogen and the reducing sugar content was very significant negative, of the total nitrogen and the nicotine content was significant positive.

总氮与还原糖含量呈极显著负相关，与烟碱含量呈极显著正相关。

Unfortunately, the fact that nicotine alone is an extremely toxic poison often goes unmentioned.

不幸的是，单独的尼古丁是一种极其有毒性的毒药而通常没被重视。

The results showed that there were 8 kinds of aliphatic, 5 kinds of esters, 2 kinds of aldehydes, 2 kinds of nitrogen sulfur heterocyclic rings and one kind of hydrocarbon, alcoholics, ketone, lactones respectively in the analyzed 21 kinds of aroma components, and the content of furfural,β-methyl valeric acid, palmitic acid, nicotine, neohytadiene were higher, next were acetyl ethyl propionate, caleric acid, phenyl ethyl acetate, hydroxylic diethyl succinate.

结果表明，在分析出的21种香气成分中，分别有脂肪酸类8种，酯类5种，醛类2种，氮硫杂环类2种，烃类、醇类、酮类、内酯类各l种，其中相对含量较高的物质成分是糠醛、β-甲基戊酸、十六碳酸、烟碱、新植二烯，其次是乙酰丙酸乙酯、异戊酸、苯乙酸乙酯、羟基丁二酸二乙酯等。

Nicotine and a number of vasoactive substances allows blood vessels, leading to eye Hypoxia ischemia organizations.

尼古丁和一些血管活性物质可使血管收缩，导致眼部组织缺血缺氧。

Studies have shown that nicotine in cigarettes can be the nerve center of exciting vasomotor and increased secretion of adrenaline, causing contraction of small arteries.

研究表明，烟中的尼古丁可以兴奋血管运动神经中枢，并使肾上腺素分泌增加，引起小动脉收缩。

Methods The constriction induced by norepinephine (NE, 10-8-10-4 mol/ L) and diastole induced by acetylcholine (Ach, 10-8 -10-4 mol/ L) in thoracic aortic ring with angiosteosis induced by vitamin D3 plus nicotine in rats were recorded by BL-Newcentrary multichannel physiologic recorder.

维生素D3(VitD3)和尼古丁诱导大鼠血管钙化模型，通过BL-Newcentrary型多导生理记录仪，观察钙化大鼠离体胸主动脉环对去甲肾上腺素(norepinephine，NE)(10-8～10-4mol/L)和乙酰胆碱(acetylcholine，ACh)(10-8～10-4mol/L)引起的收缩和舒张反应。

Although the difference of carbonous compounds was not significant, the nicotine content was significantly different among the tested genotypes.

不同基因型间含碳化合物的变化差异不大，烟碱的变化差异显著。

He was all hopped up on nicotine gum.

他总是和他的口香糖粘在一起。

In chapter 2 of this dissertation, a highly efficient synthesis of the title compound: 1-methyl-2, 3, 3a, 4, 5, 9b-hexahydro-1H-pyrrolo [3, 2-h] isoquinoline (157), a conformationally constrained nicotine analog, has been accomplished in only seven steps starting from commercially available 3-bromopyridine.

在第二章中，我们对具有刚性构象的尼古丁类似物的合成进行了研究。医学研究表明，尼古丁及其类似物对许多神经系统类疾病具有很好的治疗效果，而且药理活性与分子的构象有着非常密切的关系，许多具有刚性构象的分子有着很强的药理活性。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。