四十二

In this paper, through a series of experiments, two series of quaternary-ammounium Gemini surfactants were synthesized, namely the pair alkylene double quaternary ammonium salt surfactant m-s-m·2Br and the pair the alkylene double quaternary ammonium salt surfactant -s-·2Br. We has carried on the attribute with the infrared spectrum to its structure, and to affected the factor which the synthesis pair the alkylene double quaternary ammonium salt surfactant responded to carry on the discussion. We has discovered the synthesis pair the ethylene double quaternary ammonium salt surfactant m-2-m·2Br optimum condition: The bromo alkane and a tetramethyl ethylene diamine mole of ratio is 3.0: 1.0, makes the solvent by the ethyl alcohol, 80℃ under responds for 48 hours in the backflow temperature; Synthesis pair alkylene double quaternary ammonium salt surfactant 12-S-12 ·2Br optimum condition: 12 tertiary amine and 1, 3- propylene dibromide (1, 4- two bromines butane) a mole of ratio is 2.2: 1.0, makes the solvent by the ethyl alcohol, responds for 48 hours in the constant temperature 80 ℃ under backflow.

本文通过一系列的实验，合成了两个系列的Gemini型表面活性剂，即双烷撑双季铵盐表面活性剂m-s-m·2Br和双烷撑双季铵盐表面活性剂-s-·2Br，用红外光谱对其结构进行了表征，并且对影响合成双烷撑双季铵盐表面活性剂反应的因素进行了讨论，找出了合成双乙撑双季铵盐表面活性剂m-2-m·2Br的最佳条件：溴代烷与四甲基乙二胺的摩尔比为3.0：1.0，以乙醇作溶剂，在回流温度80℃下反应48小时；合成双烷撑双季铵盐表面活性剂12-s-12·2Br的最佳条件：十二叔胺与1，3-二溴丙烷(1，4-二溴丁烷)摩尔比为2.2：1.0，以乙醇作溶剂，在恒温80℃下回流反应48小时。

The first one and the eleventh one are concentrate to the tensibility of finger, the second one is famous of it"s fingering technique which is the typical fingering of Chopin, the third and six one are experience the layer of mufti voice parts, the fourth one is keenness which carries on by its speed and music the alone difficulty , the fifth one is the"black keyetude , harmonic innovate are visibly reflected at the seventh, the tenth and the eleventh one, humorousness is performance in the bass field in the eighth one, the ninth and the twelfth one are training stretching and running technique of left hand.

第一首与第十一首是针对手指的伸张技术；第二首是赋予了肖邦典型技术特征的指法；第三首与第六首是多声部织体的演奏；第四首是以其速度和音乐进行的尖锐性而独具难度；第五首是"黑键"练习曲；和声的创新手法在第七、第十以及第十一首里都有明显地体现；第八首最大的特点在于它用左手在低音区表现出谐谑式的旋律；第九首与第十二首在单纯手指技术上是分别训练左手的伸张及快速均匀的跑动。

The difference between the Malthusian pessimists and the cornucopian optimists," says Postel,"comes down to little more than an assumption about grain land productivity over the next several decades—specifically, whether yields will grow at closer to the 1 percent rate of the 1990s or the 2 percent rate of the previous four decades.

波斯特尔说：&在未来数十年內，持马尔萨斯人口论的悲观主义者和众多乐观主义者的争论焦点，不过是估测农田谷物的生产力而已。具体来说，谷物产量增长率是接近二十世纪九十年代的1%速率，还是接近过去四十年的2%速率？&

Those who illegally hold more than 200 grams but less than 1,000 grams of opium or hold more than 10 grams of heroin but less than 50 grams of methylaniline or hold a large quantity of other drugs are to be sentenced to less than three years of fixed-term imprisonment or detention or control and, in addition, be sentenced to paying a fine.

第三百四十八条非法持有鸦片一千克以上、海洛因或者甲基苯丙胺五十克以上或者其他毒品数量大的，处七年以上有期徒刑或者无期徒刑，并处罚金；非法持有鸦片二百克以上不满一千克、海洛因或者甲基苯丙胺十克以上不满五十克或者其他毒品数量较大的，处三年以下有期徒刑、拘役或者管制，并处罚金；情节严重的，处三年以上七年以下有期徒刑，并处罚金。

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）。

Distearyl pentaerythritol diphosphite has been synthesized with pentaerythritol, triethyl phosphite and stearic alcohol.

以季戊四醇、亚磷酸三乙酯和十八醇为原料，在实验室合成了二硬脂基季戊四醇二亚磷酸酯。

The fierce warrior Brychen who sired twelve sons and twenty-four daughters and savagely put down all attacks on his kingdom.

凶猛的勇士布赖欣生了十二个儿子和二十四个女儿，他勇猛地粉碎了对王国所有的进攻。

The synthesis of tetracosene by dimerizing tetrapropylene with waterless AlCl 3 and a complexant as catalyst was studied.

报道了一种以无水AlCl3 和络合剂制备的络合物催化剂，用于四聚丙烯二聚合成二十四碳烯，它与无水AlCl3 单独作催化剂相比，催化剂活性大大提高。

HDMI 1.3 switch series: a mini-second cut, third cut of a mini, four-and five-cut a cut a mini-mini;HDMI 1.3 True Matrix Series: four by four, and four times the second, eight二乘; eight by eightSeries HDMI 1.2 converter: DVI to HDMI, VGA to HDMI, Ypbpr to HDMI and HDMI to Ypbpr + VGA, SDI to VGA

在主品牌HDMI设备的HDMI分配器一进二出、一进四出、一进八出、一进十六出；HDMI切换器三切一、四切一、五切一、HDMI转换器VGA、DVI、SDI、HDMI矩阵切换器、HDMI网线延长器和视频王又称作为主导产品方向。

These liquids are mixed with the other ingredients, then twelve drams of honey and twelve of white sugar are added to make pills the size of longans.

&把这四样水调匀，和了药，再加十二钱蜂蜜，十二钱白糖，丸了龙眼大的丸子，盛在旧磁坛内，埋在花根底下。&

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。