季盐

The results show that the quaternary ammonium cations C12 TA(superscript + and C14 TA(superscript +) with short alkyl chain only react with the hydration cation in the interlamerllar space of hydrobiotite, while those with long chain C16 TA(superscript + and C18 TA(superscript +) first react with the hydration cation, then with the kalium cation in phlogopite interlayer.

结果表明：较短链长的季铵盐阳离子C12TA(上标+， C14TA只与水黑云母蛭石晶层中的水合阳离子发生反应；而长链季铵盐阳离子C16TA(上标+， C18TA先同蛭石晶层的水合阳离子交换反应，再与云母晶层中的钾离子发生交换反应。

The purpose of this paper is to synthesize some phosphonium salts with PPh3 and some chiral quaternary ammonium salts with L-Valine. And we also use L-Valine and L-Phe-OMe to synthesize a new type catalyst —2,5-diketopiperazine , the simplest compound of cyclo-peptide.

本文利用廉价易得的三苯基磷和手性L-缬氨酸作为起始原料，合成了几种普通季鏻盐和手性季铵盐，并且利用L-缬氨酸与L-苯丙氨酸甲酯反应，合成了一种新型的相转移催化剂——2，5-二酮哌嗪环类的化合物。

The resultapproached primary conclusion. The sterilization effects of Gemini surfactants and 1227 to sulfate reduction bacteria,saprophyte bacteria and iron bacteria have been evaluated.

根据绝迹稀释法考察了合成的双季铵盐产品对硫酸盐还原菌、腐生菌和铁细菌的杀菌效果，并与传统杀菌剂 1227 进行了比较，双季铵盐产品杀菌率超过 97%，符合企业用杀菌剂标准。

In this paper, we analyzed the larch extract tannin, aminom ethylation of larch extract tannin, quaternization of cationic larch extract tannin and amphoteric larch extract tannin (sulfonation of the larch extract tannin quaternary ammonium) by infrared spectral analysis, confirmed the quarternization and sulfonate groups, and measured its water treatment properties such as flocculation, scale inhibition, results showed that quaternization of larch extract tannin and amphoteric larch extract tannin have better water treatment ability, can realize the multifunction.

本论文采用红外光谱法对落叶松单宁、胺甲基化落叶松单宁、阳离子落叶松单宁季胺盐、两性落叶松单宁进行了化学结构分析，并对其水处理剂性能如絮凝、阻垢进行了检测。实验结果表明：落叶松单宁季胺盐和两性落叶松单宁均具有较佳的水处理能力，是性能良好的一剂多效工业水处理剂。

The related feature of tribromide quaternary ammonium salt as selective bromide reagent was investigated by the reaction of acetophanone, propanone, phenol with self-made benzyl triethyl tribromide quaternary ammonium salt.

首次通过自制的苄基三乙基三溴季铵盐与苯乙酮、丙酮、苯酚等的反应，研究了三溴季铵盐作为选择性溴化剂的相关性能。

METHODS The minimal effective bactericidal concentration of 60 strains of Gram negative bacteria resistant to QACs was detected by diluting-counting method; the phenotype to QACs by the improved phenotype screening test, the qacE-sull gene of resistance to QACs and sulphonamide compounds by PCR.

方法使用稀释计数法测定60株革兰阴性杆菌对季胺盐复合物的最低有效杀菌浓度，利用改良的表型筛选试验检测耐QACs的表型，采用聚合酶链反应试验检测耐季铵盐消毒剂-磺胺复合物基因qacE-sul1。

Methods:The minimal effective bactericidal concentration of 60 strains Gram negative bacterium resistant to QACs were detected by diluting-counting method; the phenotype to QACs by the improved phenotype screening test,the qacE-sul1 gene of resistance to QACs and Sulphonamide Compou...

使用稀释计数法测定60株革兰阴性杆菌对季胺盐复合物的最低有效杀菌浓度，使用改良的表型筛选试验检测耐QACs的表型，使用聚合酶链反应试验检测耐季铵盐消毒剂-磺胺复合物基因qacE-sul1。

It showed that the capability of flocculation of quaternary ammonium salt of alkali ligninto black acid ATT was good.

对于麦草碱木质素季胺盐，实验表明：木质素季胺盐对酸性黑ATT染料溶液的絮凝效果较好。

The effects of diluents and inorganic ions in the aqueous on the interfacial properties of BODMAC were studied.

季铵盐BODMAC在不同萃取体系中的界面性质本部分内容系统地研究了稀释剂性质、水相无机离子等因素对季铵盐BODMAC界面性质的影响。

The results show that methyl group strengthens the electrostatic attractions, but reduces the H-bonds effect, while benzyl group can make both electrostatic and H-bond effects strong. The theoretical results are identical with the results of the collectors flotation tests. Collecting ability of the quaternary amine salts is better than that of dodecylamine and dodecyl bimethyl amine. The quaternary amine salt containing benzyl group performs best, and it is little affected by pH value. Substitution of N-containing polar group in amine collectors can impact the aluminosulicate minerals flotation.

研究结果表明：甲基的取代可增强阳离子的静电作用能力，同时，削弱它与矿物表面之间的氢键作用；苄基的取代不仅增强药剂的静电效应，而且增加氢键的结合能力；理论分析结果与浮选试验结果一致，季铵盐的浮选能力较伯胺与叔胺的强，连有苄基的季铵盐对铝硅酸盐矿物的捕收能力最强，且受pH值影响小。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。