活性剂

A highly sensitive resonance light scattering method for the determination of fsDNA was developed. It was based on the enhancement of the intensity of RLS by the synergistical action of phloxine B, fsDNA and cetyltimethylammonium bromide.

研究了阴离子染料荧光桃红B对鱼精脱氧核糖核酸和阳离子表面活性剂嗅化十六烷基三甲按的共振光散射光谱有协同增强作用，建立了一种定量测定fsDNA的灵敏度高、操作简便的共振光散射方法。

In optimal condition, the biosurfactant concentration can reach 2.2g/L in 150h with 20g/L tetradecane as sole carbon source, the biosurfactant concentration was stable at 165~220mg/L with 20g/L crude oil as sole carbon source.

4在优化条件下，以20g/L十四烷为碳源，培养150小时，糖脂表面活性剂浓度可达到2.2g/L，以20g/L石油为唯一碳源，糖脂浓度稳定在165～220mg/L。

Inoptimal condition, the biosurfactant concentration can reach 2.2g/L in 150h with 20g/L tetradecane as sole carbon source, the biosurfactant concentration was stable at 165~220mg/L with 20g/L crude oil as sole carbon source.

4在优化条件下，以20g/L十四烷为碳源，培养150小时，糖脂表面活性剂浓度可达到2.2g/L，以20g/L石油为唯一碳源，糖脂浓度稳定在165～220mg/L。

Under the conditions of suitable pH, chondroitin sulfate was reacted with cationic surfactant, such as tetradecyl pyridinium bromide, tetradecyl dimethyl benzyl ammonium chloride, cetyl pyridinium chloride monohydrate and cetyl trimethyl ammonium bromide, to form stable association microparticles.

在适宜的pH条件下，硫酸软骨素可与溴代十四烷基吡啶等阳离子表面活性剂形成稳定的缔合物微粒。

Three cationic surfactants, N -dodecyl- N -(2-hydroxyethyl)- N , N -dimethylammonium bromide, N -tetradecyl- N -(2-hydroxyethyl)- N , N -dimethylammonium bromide and N -cetyl- N -(2-hydroxyethyl)- N , N - dimethylammonium bromide have been synthesized.

合成了 N -十二烷基- N -(2-羟乙基)- N ， N -二甲基溴化铵、 N -十四烷基- N -(2-羟乙基)- N ， N -二甲基溴化铵和 N -十六烷基- N -(2-羟乙基)- N ， N -二甲基溴化铵等3个季铵盐阳离子表面活性剂。

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）。

Micrometer-sized MoO2 hollow spheres were synthesized hydrothermally with ammonium heptamolybdate tetrahydrate as molybdenum source, Cetyltrimethylammonium bromide as structure-directing agent and C2H5OH as reducing agent, respectively.

在阳离子表面活性剂的作用下，以钼酸铵为钼源，乙醇作为还原剂合成了微米级MoO2空心球。

Oligomeric surfactants are a new class of amphiphiles including dimeric, trimeric,and tetrameric,etc.These surfactants are made up of two amphiphilic moieties connected at the level of the head groups or very close to the head groups by a spacer group.

低聚表面活性剂包括二聚、三聚、四聚以及具有更高聚合度的两亲分子，它是由两个或两个以上相同或几乎相同的两亲分子，在其头基或靠近头基处由连接基团通过化学键连接在一起构成的。

These results above indicated that ordered mesoporous titanosilicate with different Si/Ti molar ratio could be obtained using trimeric surfactant C_(14-2-14-2-14) as templating agent and the Si/Ti ratio could be as low as 5 without the losing of mesostructure ordering.

上述结果说明以自组装能力强的三聚表面活性剂C_(14-2-14-2-14)为模板剂可以制得不同钛含量的介孔硅钛酸盐材料，尤其是可以得到Si／Ti比低至5的高钛含量介孔硅钛酸盐材料，这对于提高此类材料的氧化催化性能有重要意义。

Here we synthesize mesoporous titanosilicate MTS-9 and ferrisilicate MFS-9 by using zeolite TS-1 and FeS-1 seed solution as inorganic precursor respectively and triblock copolymer surfactant as template.

我们分别使用TS-1和FeS-1导向剂为无机原料，以三嵌段共聚化合物表面活性剂为模板，合成了钛硅介孔分子筛MTS-9和铁硅介孔分子筛MFS-9。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。