十二烷基

The first and second insert organophilic montmorillonite are prepared from sodium dodecylsulfonate and cetyltrimethylammonium bromide.

采用十二烷基磺酸钠及十六烷基三甲基溴化铵对蒙脱土进行了一次、二次插层改性，红外光谱和X射线衍射表明，两种有机插层剂均已进入蒙脱土的层间，有机蒙脱土的层间距由1.22 nm增加到3.64 nm；沉降实验结果表明这种改性蒙脱土在有机介质中表现出很好的分散性。

The intermixture of positive ion surfactant Cetyltrimethyl Ammonium Bromide and zwitterion surfactant N,N-C12BE was used to modify the natural zeolite. Correlative parameters of modified zeolite adsorbing Cr and phenol from wastewater were studied.

摘 要：用阳离子表面活性剂十六烷基三甲基溴化铵与两性离子表面活性剂 N，N-二甲基十二烷基甜菜碱复配的混合表面活性剂对天然沸石改性，研究了改性沸石吸附废水中 Cr 和苯酚的相关参数。

The catalytic performances of the catalysts were studied by alkylation reaction of benzene and dodecylene in a micro-reactor.

采用负载磷钨酸的SBA-15分子筛作为催化剂，以苯和十二碳烯为原料，经烷基化反应合成十二烷基苯。

The inhibitory potency of geranyl gallate is as about six times as that of lauryl gallate on mushroom tyrosinase. Lauryl gallate was determined to be an uncompetitive inhibitor while geranyl gallate belongs to be a mixed-type inhibitor.

没食子酸香叶酯对蘑菇酪氨酸酶的抑制作用比没食子酸十二烷基酯更强，没食子酸十二烷基酯表现为反竞争性抑制类型，而没食子酸香叶酯表现为混合型抑制类型。

In this paper, a systematic study on the wetting capacity of sulfate of myristic acid monoethanolamide was made by the canvas sinkking method, through measuring the wetting time of MMS's solution under different concentration, different temperature and different degree of hardwater and comparing with three other surfactants.

对肉豆蔻酸单乙醇酰胺硫酸酯盐的润湿性能进行了系统研究，用帆布沉降法测定了MMS在不同温度、不同质量分数溶液、不同硬水度中的润湿性能，并与其他表面活性剂十二烷基硫酸酯盐、月桂醇醚硫酸酯盐、十二烷基苯磺酸盐进行了比较。

Monododecylphosphate was prepared by esterification of lauryl alcohol with phosphoric acid(mass fraction 85%) on cesium phosphotungstate catalyst.

以磷钨酸铯盐为催化剂，由月桂醇和85%的磷酸直接酯化合成单十二烷基磷酸酯，考察了带水剂种类、反应时间、磷钨酸铯盐催化剂中的铯取代数、催化剂用量和月桂醇与磷酸摩尔比等条件对磷酸转化率及单十二烷基磷酸酯选择性的影响。

The dispersion effect of sodium dodecyl benzyl sulfate was better than that of sodium dodecyl sulfate and polyvinyl pyrrolidone.

离子型表面活性剂十二烷基苯磺酸钠优于十二烷基硫酸钠和非离子型表面活性剂聚乙烯吡咯烷酮。

The micelle shape transformation of tert-octylpheny phenol polyethylene glycol ether (TX-100), sodium dodecyl benzene sulfonate and tetradecyl trimethyl ammonium bromide in heavy water solutions was studied by 1H nuclear magnetic resonance spectroscopy, including an NMR self-diffusion experiment. These experiments showed that the surfactants formed several shapes of micelles (spherical, ellipsoidal, and rodlike) at the respective concentrations which were far above their critical micelle concentration.

运用核磁共振一维氢谱和自扩散实验方法研究了聚乙烯乙二醇异辛酚醚(TX-100)、十二烷基苯磺酸钠和十四烷基三甲基溴化铵三种不同类型的表面活性剂在重水溶液中的胶束形状转变，发现它们在临界胶束浓度以上的各自相应浓度都有胶束形状的变化（由球状转变为椭球状或棒状）。

The degree of the plumping of the cattle hide and the removal of the hair were evaluated during the li- ming process;the protein,suspending substance,sodium sulfide and effective calcium oxide contents in the liming liquor and the fat content in the limed hide were measured;also,the tissue slice of the limed hide was observed by optic microscope.

将不同量的十二烷基硫酸酯钠、十二烷基三甲基氯化铵和平平加O分别添加到浸灰液中，观察浸灰过程中皮膨胀情况和毛脱除情况，测定浸灰废液中蛋白质、悬浮物、硫化钠和有效氧化钙含量及浸灰皮油脂含量，并对浸灰皮组织切片进行显微镜观察。

A combination of stopped-flow,transmission electron microscopy and dynamic light-scattering techniques has been used to study the kinetics of vesicle formation and breakdown as well as the mechanism of vesicle formation and breakdown in DTAB/SDS aqueous solutions.

利用停流装置研究了十二烷基硫酸钠和十二烷基三甲基溴化铵复配形成囊泡的过程和囊泡破坏过程的动力学性质，并结合动态光散射技术和电子透射显微镜探索囊泡形成和囊泡破坏过程的机理。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷