季盐

A multi-head quarternary ammonium salt type surfactant, notated as NTX-100, with ≥50% active substances is prepared from long chain fatty acids.

由长链脂肪酸合成了多头季铵盐型表面活性剂NTX 100(有效物≥50%)。

The influence of various factors such as pH, volume of titration mixture, quantity of sample in a definite volume to be titrated were studied.

可测的浓度范围和胺类的四苯硼酸盐沉淀的溶解度有关：仲胺为1×10~(-3)-2×10~(-2M)；叔胺为6×10~(-4)-2×10~(-2)M；季胺为4×10~(-4)×10~(-3)M；伯胺类不能测定。

The decolorization rate of black acid ATT was 78% when the dosage of quaternary ammonium salt of alkali lignin was 1184.5mg/L.

当处理后木质素季胺盐为1184.5mg/L时，酸性黑ATT染料溶液脱色率为78%。

The inhibition action of chitosan quaternary ammonium was studied for carbon steel in sulfuric acid.

研究了壳聚糖季铵盐作为单组分缓蚀剂对碳钢在硫酸溶液中的缓蚀性能，以及缓蚀剂浓度、温度、时间和特性粘度、取代度等因素对缓蚀效果影响。

The surfactant contains quaternary ammonium group; b, the surfactant is a complex macromolecule which takes the yellow humic acid as the main body , has no fixed compounds and can be degraded in nature.

含有季铵盐基团；b。以黄腐植酸为主体，是一种复杂的有机大分子，没有固定的组成，在自然界中就可以分解。

Chiral SalanCrX complexesa saturated version of SalenCr(ⅢX are designed,and in conjunction with an ionic quaternary ammonium salt or organic strong base can efficiently catalyze the asymmetric,regio-and stereoselective alternating copolymerization of CO_2 with rac-PO at mild conditions to afford isotactic-enriched polycarbonates with～95%head-to-tail linkages and moderate enantioselectivity.

本论文在Salen构型配体的基础上，设计合成了一系列手性Salan型铬配合物，并将其与季铵盐/有机强碱组成亲电-亲核双组分催化体系，在室温下可以有效的催化CO_2和环氧丙烷的不对称交替共聚反应，实现了CO_2和环氧丙烷的不对称交替共聚反应的区域和立体化学控制，得到95%的头尾连接单元和中等光学纯度(对映体过量值ee%≈70%)的全同结构的聚碳酸酯。

QN 〓PHAL,〓PHAL and 〓PHAL were quaternized by refluxing with benzyl bromide to give ligands 8, 9 and 10 respectively. 2. The chiral ligands were applied to the AD reaction of olefins with NMO as co-oxidant and PEG (400 MW) or PF〓 as reaction media.

以奎宁和奎尼定为原料分别与1，4-二氯-2，3-二氮杂萘反应制备〓PHAL和〓PHAL，然后通过〓PHAL、〓PHAL及〓PHAL与苄基溴的季铵化反应制备单季铵盐手性配体8、9和10。

The optimum conditions were obtained: the amounts of NaOH solution,quaternary ammonium and benzyl chloride are respectively 16 mL,0.4 g and 15 mL; the reaction temperature and time are 120 ℃ and 3 h.

在NaOH溶液用量16 mL，反应温度120 ℃，季铵盐用量0.4 g，反应时间3 h，氯化苄用量15 mL的条件下，竹纤维的接枝率达143.68 %。

Effects of reaction temperature, reaction time, the amount of alkali, benzyl chloride and quaternary ammonium on grating rate of benzylated natural bamboo fiber have been discussed.

以接枝率为考察目标用正交试验探索了反应温度，碱用量，反应时间，氯化苄及助剂季铵盐的用量5个因素对天然竹纤维苯甲基化改性的影响，确定了最佳反应条件。

The preparation and application of reactive antibacterial agents, such as silicone quaternary ammonium salt, halogenated hydroxy diphenyl ether, chitosan, halamine and other kinds, etc, were introduced in detail based on the art and development trend both here and abroad.

文章针对现有反应性抗菌整理剂的国内外发展现状和趋势，详细介绍了有机硅季铵盐、卤代羟基二苯醚、壳聚糖、卤胺及其他类等反应性抗菌整理剂的制备过程和应用情况，并对其应用前景作了展望。

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。