二十二烷

Taking Na_2SnO_3·3H_2O as raw material, organic reagent (pentyl alcohol, butyl alcohol, cyclohexane) as dispersant, and adding anion surfactant (sodium dodecyl alkylbenzen sulfonate, ABS), uniform ultrafine SnO_2 powder is prepared by hydrothermal method using Sn_4 deposition as precursor.

以Na2SnO3·3H2O为原料，有机试剂(正戊醇、正丁醇、环己烷)为分散剂，同时加入阴离子表面活性剂(十二烷基苯磺酸钠，ABS)，以氢氧化锡沉淀为前驱体，用水热法制备了粒度均匀的SnO2超细粉体。

The reaction of condensation-cyclization of the two prepared compounds at 100 ℃ in the presence of anhydrous potassium carbonate gave 1,4,7,10-tetrakis(p-toluenesulfonyl)-1,4,7,10-tetraazacyclododecane,with a yield of 71%.

在无水碳酸钾存在下，100℃加热使所得两种磺酰化产物缩合环化得到1，4，7，10-四-1，4，7，10-四氮杂环十二烷，产率71.0%。

In the presence of Ag 2O,the 1 bromobixadecane was converted to dotriacontane in high yeild by stirring with protection from light in DMF at 80 ℃ for 24 h.

正三十二烷可以从植物中分离［1］，曾被用作气相色谱的固定相［2］，也是豆类昆虫的引诱剂，在化学一上该物质还有其它应用。

Finally, two components mixture of caprylic acid and lauryl alcohol was used to attestate the validity of the process model. The model was also used in the simulation of the paroxetine free base and PB, compared with experimental outcome, analyzed the relatively error between experiments and simulations to further check the rationality of the model, which is beneficial to establish a more perfect model in the future.

应用正辛酸-十二烷醇对模型进行验证，并应用此模型模拟计算了帕罗西汀碱和胡椒基丁醚的分离过程，进一步验证了此模型的合理性，分析了产生实验值与模拟值相对误差的原因，为进一步完善刮膜式分子蒸馏过程模型奠定了基础。

The thermodynamics was calculated in detail for dodecane to dodecene by catalytic dehydrogenation at low temperature and high pressure.

较为系统地计算了正十二烷脱氢的主反应在较低温度和较高压力下的热力学数据，并对较高压力下的浓度和热力学函数进行了校正。

The results show that the best addition of OP-10 is 0.10% and it can effectively stabilize the dispersity of the nano-iron/ethanol sol.

结果表明，加入0.10的十二烷醇聚氧乙烯醚对纳米铁颗粒的分散起到很好的稳定作用。

The evaluation of the catalysts in the n dodecane hydroconversion showed that, when the Si/Al rat.

正十二烷加氢转化反应评价表明，在催化剂Si/Al比为 17。

The hydroconversion of n dodecane on the Pt M/SAPO 11 catalyst was investigated in a microreactor.

以正十二烷为模型化合物，在高压微型反应装置上进行了长链烷烃在Pt M/SAPO 11催化剂上的加氢异构化反应规律研究。

Different additives acted differently in the course of fermentation. Dodecane as oxygen vector and cosolvent, Tween-85 as surfactants and structure analog of carbon source, were the most important for the lipase production.

不同的添加剂在发酵的过程中所起的作用不同，正十二烷作为氧载体和溶剂的作用，Tween-85作为表面活性剂和碳源结构类似物的诱导作用，在发酵过程中对脂肪酶能够大量的产生都是至关重要的。

A method for increasing the fermentation production of hyaluronic acid by adding an oxygen carrier of dodecane belongs to the technology field of applying the oxygen carrier to the optimization of the fermentation process.

一种用添加氧载体正十二烷提高发酵生产透明质酸产量的方法，属于氧载体在发酵过程优化中的应用技术领域。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。