烟碱

To examine the effect of ACh, the researchers looked at the brain's nicotinic acetylcholine receptors, to which ACh binds to stimulate neural activity.

为了研究乙酰胆碱的作用，研究者们研究了大脑了的烟碱乙酰胆碱受体，烟碱乙酰胆碱受体是乙酰胆碱的结合部位，并刺激神经活动。

Both high temperature and high humility are beneficial to formation and accumulation of nornicotine during yellowing .

去甲基烟碱含量烤后较烤前增加，而且变黄期高温、高湿均有利于去甲基烟碱的形成和积累。

Methyllycaconitine , alpha bungarotoxin , nicotine, and nornicotine were also tested for comparison.

作为对比，甲基牛扁亭，α-银环蛇毒素，烟碱和去甲基烟碱也同时作了测试。

The analysis of correlation indicated that tobacco breeding with higher potassium content has the characteristics of higher stalk height, wider stalk circumference, longer leaf and more leaf number comparatively. The correlations between potassium content and nicotin among top, middle and bottom tobacco leaves were all negative. The correlation among potassium content and malondialdehyde,superoxide dismutase, conductance ratio; and protein, solubility sugar, chlorophyl and free water/bondage water were all attained marked level, however, the essence of correlation was different: the former was negative but the latter was positive. 4.The analysis of heterosis demonstrated there were different degree heterosis in the potassium content of tobacco leaf and other correlated characters, including agriculture, physiology and biochemistry.

相关分析表明，烟叶钾含量性状与株高、茎围和最大叶长的相关性达到了显著和极显著的水平，与叶数的相关虽未达到显著水平，但相关程度相对较高；烟叶钾含量与烟碱在上、中、下三部位叶之间均呈负相关关系，中部叶烟碱与烟叶钾含量的相关达到了极显著水平；烟叶钾含量性状与丙二醛、SOD和电导率以及与蛋白质、可溶性糖、叶绿素和自由水/束缚水之间的相关性均未达显著水平，但相关性质不同，烟叶钾含量性状与前三者之间表现负相关关系，而与后四者之间呈正相关关系；4。

The results showed: 1 RN didn't the leaf width,leaf long,leaf area,yield,productive value and average price of flue-cured tobacco,but had significant effect on grad composing,content of chemical component and the accumulation of N,K and Cl.Within limited rang of RN,the relations between yield,average price,yield of high grad tobacco,yield of low grad tobacco,nicotin,N,reducing sugar,Cl,amylum,volatile base and the quotient of ammonium would been described by significant quadratic polynomial,and the relations between K and the quotient of ammonium conformed to negative linear equation;2With a RN of 75%∶25%,the value of proportion of high and middle grad tobacco,content of nicotin,N,K,uptake of N and K/Cl were the highest,volatile base was lowest.

结果表明：1RN对烤烟的农艺性状、产量、产值、均价等没有明显影响，而对烤烟的等级结构、内在化学成分含量、氮、钾、氯的吸收量有着显著影响，可以用显著的二次多项式模型或直线相关方程描述产值、均价、上等烟产量、下等烟产量等经济性状以及烟碱、总氮、钾、还原糖、氯、淀粉、挥发碱等内在化学成分的含量与铵态氮份额之间的关系；2RN为75%∶25%时，中上等烟比例、烟碱、总氮、钾、钾氯比、氮吸收量最高，挥发碱含量最低。

After toping, the content of Nicotine was decreased by IAA, but increased by ABA.

打顶以后，喷施一定浓度 IAA可以降低烟碱的含量，而喷施 ABA可以增加烟碱的含量。

Because biosynthsis of Nicotine was rapid in the 0-10 days after toping, if plant hormone was used to regulate content of Nicotine in production, it had better be applied in the toping day.

由于烟碱的合成在打顶后0叶0天较快，因此，施用植物激素调控烟碱含量应当及早进行，最好打顶当日即施用。

This tea-saponin kind of plant pesticide contains tea-saponin as its main component and others such as nicotine (or nicotine and other active components from plant), solvent, assistant and antiseptic agent.

茶皂素类植物性杀虫剂属于含有多种植物提取物的杀虫药。其主要组分是茶皂素，其次为烟碱或烟碱和其它植物有效成分以及溶剂、助剂和防腐剂。

These cut tobacco were filled into the empty cigarette tubes of brand A and B by a CMB-120 LAB CIGARETTE MAKER machine.

用CMB-120实验室卷烟机将这些烟丝分别填充到A和B两个牌号的空烟管中后，测定了烟支烟气烟碱量和总粒相物游离烟碱量，并进行了感官评吸。

The results show: the new schedule was simple, easy-running, and the Quality of cured tobacco was improved: rates of orange tobacco, the first class tobacco higher than check by 3.38, 4.74percentage, average price is 01.53 yuan/kg higher. Meanwhile, total sugar, starch, nicotine, total nitrogen, protein and the difference between total sugar and reduce sugar is lower, and chemical composition is more balance than check.

结果表明：设置的烘烤工艺阶段简单，操作方便，烟叶烘烤后，比三阶段烘烤工艺烘烤的烟叶桔黄烟比例、上等烟比例、上中等烟比例分别增3.38、4.74、2.03个百分点，鲜干比增高0.03，均价提高0.53元/kg；总糖、淀粉、总氮、烟碱、烟碱氮、蛋白质的含量及总糖与还原糖的差值有所降低，烟叶化学成分更为协调。

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。