吡啶

On basis of the color reactions of 4-(2-pyridine azo)-resorcin with copper, zinc and manganese, but the absorption spectrum of complex compounds which they created overlapped with each other seriously. Dealing with the spectrum data with the method of multivariate calibrations of chemometrics, we can simultaneously analyze the measured spectrum of mixture.

基于这三种金属离子均能和4-（2-吡啶偶氮）－间苯二酚发生显色反应，但所生成络合物的吸收光谱重叠比较严重，采用化学计量学的多元校正方法，解析了Cu(上标 2+)、Zn(上标 2+)、Mn(上标 2+)混合物的测量光谱。

In Chapter 5,the pyrolysis of substituted six-membered ring model compound 4-methyl pyridine has been investigated.Instead of detail theoretical analysis of the reaction mechanism,the general results have been proposed from the products distribution and the combination of the pyrolysis investigation of its analogous pyridine.The major products are H_2,C_2H_2,C_4H_2,C_3H_3N and HCN,here HCN is not a primary initial product at low extent of decomposition.The mole fraction profiles of products have been obtained from the near threshold ionization.The pyrolysis of 4-methyl pyridine is initiated from the methyl abstraction and hydrogen abstraction procedures which are associated with the understanding of the soot formation and the NOX precursor correspondingly.

主要产物为H_2，C_2H_2，C_4H_2，C_3H_3N和HCN，其中HCN为非低温时的热解产物；通过近阈值电离并导出物种随温度变化的摩尔分数曲线，更详细地定量地描述了产物随温度的变化。4-甲基吡啶热解主要从母体脱甲基和脱氢两个初始反应出发，一种趋势是形成大质量数的苯并或杂环的多环化合物，有助于了解炭黑形成过程中的复杂化学过程；另一趋势是开环生成小的碳氢和腈类物质，实验得出的含氮物质的种类及随温度变化有助于了解NO_x的前驱物质的形成及其变化规律。

This dissertation is dedicated to investigate the pyrolysis of the fuel-bonded nitrogen model compounds,including five-membered ring nitrogen model compound pyrrole and the substituted six-membered ring nitrogen compound 4-methyl pyridine,with vacuum ultraviolet single-photon ionization combined with molecular beam mass spectrometry technique.

本论文利用同步辐射真空紫外单光子电离、分子束取样和反射式飞行时间质谱相结合的技术研究了含氮杂环模型化合物的热解，包括五元环含氮体系、六元环含氮体系和替代的六元环含氮体系(4-甲基吡啶)。

Penoxsulam is ramping up well, the aminopyralid launch has been excellent, we're on target for our pyroxsulam project RTO in 2007 - and we made good progress on our goals of aggressive transition to our proprietary traits in corn.

比如：除草剂五氟磺草胺的市场效应表现良好，而氯氨吡啶酸这种除草剂在投入市场后，也反应热烈。在2007年度目标里，我们集中开发项目产品：蓄热式氧化器；而且，在专利谷物的快速转型目标中，我们也向前迈出了一大步。

Objective To investigate the neuroprotective effects of a sapogenin from Rhizoma Anemarrhenae on nigrostriatal dopaminergic neurons in chronic 1-methyl-4-phenyl-1, 2, 3, 6-tetrahydropyridine-lesioned mouse model.

目的 研究知母活性成分ZMR对慢性1-甲基－4-苯基－1， 2， 3， 6-四氢吡啶损伤小鼠模型黑质纹状体通路多巴胺神经元的影响。

The critical crossover behavior in the ternary electrolyte solutions of water＋3-methylpyridine＋sodium bromide is a matter of debate.

对水＋3-甲基吡啶＋溴化钠三元电解质溶液的临界跨接行为的认识存在着争议。

PP–Ag NPs were obtained in water by reacting silver nitrate with sodium borohydride in the presence of 4-(prop-2-ynyloxy)pyridine solution at room temperature for 2 h.

PP－Ag NPs是在存在4（丙炔-2-基氧基苯基）吡啶溶液的情况下，通过硝酸银与硼氢化钠在室温下反应2h而在水中得到的。

The results show that using 2, 2-Bipyridyl and sodium thiosulfate can increase brightness of coating, enlarge the scope of current density.

试验结果表明：2，2-联吡啶和硫代硫酸钠联合使用可以提高镀层的光亮性，扩大镀液的电流密度范围。

In order to further increase the brightness of electroless silver plating and improve the performance of bath, the influence of a, a'-Bipyridyl and sodium thiosulfate on the face of coating was studied by Hull Trough test, surface morphology of coating with basic formula and optimizing formula was observed by metalloscope.

为了进一步提高烟酸镀银的光亮性，改善镀液的性能，通过赫尔槽试验研究了2，2-联吡啶与硫代硫酸钠对镀层外观的影响，并用金相显微镜观察基础配方和优化配方的镀层的表面形貌。

The hemisuccination process and reaction kinetics of stigmasterol with succinic anhydride using toluene as a solvent,pyridine as a catalyst were studied.

研究了甲苯为溶剂，吡啶为催化剂，豆甾醇与琥珀酸酐的酯化反应工艺和反应动力学。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了