烟碱

Th e amnesic effect of scopolamine can be antagonized by nicotine.

烟碱可以对抗东莨菪碱所引起的健忘效果。

A method for chiral analysis of anatabine,nornicotine and anabasine in tobacco has been established.

建立了烟草中新烟草碱、降烟碱和假木贼碱的手性分析方法。

Part two, Three analogue compounds of actamiprid were synthesized by analogue synthesis method through the intermediates which have insecticide activity.

第二部分中，选取本身具有杀虫活性的基团取代吡虫清中的2-氯-5-氯甲基吡啶，采用"类同合成法"合成了3个烟碱类杀虫剂吡虫清的类似物。

The crystal structure of binding protein of acetylcholine can help us to understand the role of basic aminoacid in D ring of binding location of ACh in the selectivity of neonicotinoid insecticides.

乙酰胆碱结合蛋白的晶体结构帮助人们进一步认识了D环上碱性氨基酸残基在新烟碱类选择机制上的作用。

Study on molecular characters of atagonist indicated that neonicotinoids insecticides and the active pharmaceutical group displayed electro-negative and electro-positive, and study on the interaction between atagonist and nAChR at the complex of subunit of insect and subunit of mammalian indicated that the effect of basic aminoacid in D ring of binding location of ACh is very obvious, and the YXCC in C ring of binding location also attracted the attention too.

激动剂的分子特点研究表明，新烟碱类杀虫剂和ACh药效基团在静电性上分别显示负电性和正电性。用昆虫亚基和脊椎动物亚基组成的杂合受体同激动剂相互作用的研究，主要集中在受体亚基上不同氨基酸残基与不同激动剂结合电生理效应的特点上。

Burley tobaccos have a low carbohydrate content of nitrogenous materials, nicotine, and nonvolatile acids.

白勒烟 含有较低的碳水化合物和含氮化合物，烟碱和非挥发性酸。

CCA indicates that there are strong integrated correlation between mainstream smoke and the physical and chemical properties, where canonical variable U representing information of mainstream smoke is mainly contributed by TPM, tar, nicotine, vapor, vapor content and puff times; canonical variable V representing physical and chemical information of cigarettes is mainly contributed by ventilation rate, close resistance, cigarettes weight and total sugar, total organic chlorine etc, where ventilation rate plays an important role.

典型相关分析表明：卷烟主流烟气与物理化学信息间存在显著的整体相关，其中反映主流烟气信息的U典型变量主要来自总粒相物、焦油、烟碱、水分、水分含率及抽吸口数的贡献；反映物理、化学指标信息的V典型变量主要来自稀释率、闭式吸阻、单支重及总糖、氯等化学指标的贡献，其中稀释率的作用最大。

The results showed that plant height increasing speed was significantly slow at the former and middle stage when K level was above 180 kg/hm2.On the contrary,the height of case-hardened plant improved markedly.When the K level was above 135 kg/hm2,the stem girth and maximal leaf area differed significantly as compared with CK,so did LAI.Yield and product value per unit area took the first place when 180 kg/hm2 potassium was used.Average price and proportion of middle and first grade tobacco leaf of 225 kg/hm2 potassium treatment were the highest as compared with other treatments and CK.Four economic characters of the two treatments differed at obvious significant level as companied with CK.The total sugar and K2O were increased,nicotine, total N,protein and Cl- were decreased with increased K levels.The potassium lacked symptom was alleviated with increased K levels,no symptoms was observed when 180 kg/hm2 potassium was used,the degree of weather infected fleck was decreased when the K levels was increased.

结果表明，在烟株生长前中期，当施钾量达到180 kg/hm2以上时，株高增长显著变慢，而定型株高则显著增高；茎围和最大叶的面积在施用135 kg/hm2以上的处理与CK之间的差异性达到极显著水平，叶面积指数也存在显著差异；单位面积产量和产值以施用180 kg/hm2的处理居首位，中上等烟比例和均价以施用225kg/hm2的处理最高，这两种处理的以上4个经济性状与CK之间存在极显著性差异；烟叶中的总糖和K2O含量随施钾量的增加而上升，烟碱、总氮、蛋白质和C-含量则下降；缺钾症状随施钾量增加而减轻，至施用180kg/hm2时已无缺钾症状；烟叶气候斑的发生程度也随施钾水平的提高而减轻。

The results of this study show that repeated injection of nicotine can lead to tolerance of hypothermic response, but motor activity response of females was significantly greater than the male rats after sequential nicotine injections.

重复注射烟碱可导致雄性和雌性大鼠出现降温耐受性反应，但连续注射烟碱后，雌性大鼠的活动明显大于雄性大鼠。

The contents of carbonaceous compounds, such as soluble saccharide, petroleum ether extract and volatile acid in mellow leaves were higher than in overripe leaves, but nitrous compounds, such as nicotine, total nitrogen, volatile alkali, in mellow leaves were lower than in overripe leaves.

过熟烤烟烟叶除葡萄糖含量变化不明显外，果糖、麦芽糖、蔗糖等水溶性糖和石油醚提取物、总挥发酸及钾含量均大幅度降低；而氮、烟碱、挥发碱和挥发碱／烟碱等重要化学指标明显升高。

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。