查询词典 gemini

The Gemini phosphate surfactant was synthesized with decyl digomeric glycol and phosphatizing agent P205 by phosphatizing.

实验选择苄基三乙基氯化铵为催化剂，用量为4%，投料比为2：1，反应温度为60℃，反应时间为6时，最终产率为78.3%。

Chapter four. Two glucosamide-based trisiloxane Gemini surfactants which were connected with the short carbon chain dialcohol diglycidyl ether spacer were synthesized and their properties were determined. These compounds were structurally characterized by their 1H and 13C NMR spectra and elemental analysis.

界面性能通过K12表面张力仪测定，在临界聚集浓度CAC为1一3、10一5时可以显著地降低水的表面张力值至约21 mN/m，比连接基为低碳链二缩水甘油醚的略低，其CAC值随着乙氧基数的增加而增加，其CAC值比相应的单体低1~2个数量级，而且有两个CAC值。

This task mostly synthesis dialkyl disulfonic sodium diphenyl methane and dialkyl disulfonic sodium diphenyl aether gemini surfactants.

本论文合成了二苯甲烷类与二苯醚类两类双烷基双磺酸基阴离子双子表面活性剂。

At present, a kind of novel surfactant oligomeric surfactant which have high surface activity have become one of focus on surfactant research. A typical example of them is dimeric or Gemini surfactant.

当前，一类新型的表面活性剂—低聚表面活性剂成为研究的热点，其中典型的例子是二聚表面活性剂，也称为双子表面活性剂。

This paper mainly studied the synthesis and characterization of some dissymmetric bis-quaternary ammonium gemini surfactants, then determined the surface tensions of their water solutions, finally calculated their critical micelle concentrations and build a surface tension-concentration model.

本文主要研究了非对称型季铵盐双子表面活性剂的合成与表征，测定了其水溶液的表面张力，并计算出其临界胶束浓度。

A series of dissymmetric Gemini surfactants with the structure ofC_(12H_(25)CH_(3_(2)N~CH_(2_(4)N~CH_(3_(2)C_mH_(2m+1),denoted as C_(12)-4-C_m(m is 14,16,18),have been synthesized with N,N-dimethylalkylamine and 1,4-dibromobutane as the initial reagents.

以N，N-二甲基脂肪胺和1，4-二溴丁烷为原料，合成了一系列具有不同疏水链的不对称Gemini表面活性剂C12H25(CH3)2N+(CH2)4N+(CH3)2CmH2m+1(C12-4-Cm，m=12，14，16，18)，并通过1H NMR、MS和元素分析等方法鉴定其结构。

Using 2-bromo-ethanesulfonic acid sodium salt ,α,ω- binary primary amine and dodecanoic acid as the main raw materials, drawing support from two-step synthesis of experiments—Alkylated reaction and Schotten-Baumann acylation, A series of LAS(12-s-12) gemini surfactants were synthesized.

并以2-溴乙基磺酸钠、α，ω-二元伯胺、月桂酸等为主要原料，借助胺基的烷基化和Schotten-Baumann酰基化反应制备了α，ω-烷撑-双钠盐LAS(12-s-12)表面活性剂，联结基团为亚甲基—(CH2)s—(S=2，4，6，8，12)，取得以下进展

You may be of two minds now with the Moon in the sign of dualistic Gemini.

对于工作中复杂情况的准确认识现在被你放在了首位。

But you don't need to know Gemini to see the meteor shower. The Geminid meteors will streak across the heavens from late night till dawn.

但是你并不需要知道双子座的具体位置就能看到流星雨，因为双子座流星雨将从今夜晚些时候一直持续到黎明时分。

Geminid meteors are named for the constellation Gemini the Twins.

双子座流星雨的名字来源于双子星系。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？