查询词典 distillation

Glycidyl benzoate,glycidyl propionate,glycidyl acetate were obtained respectly through a phase-transfer catalytic methodology using sodium benzoate, sodium propionate, sodium acetate and epichlorohydrin as raw materials, and pure products were obtained though vaccum distillation.β-cyclodextrin and glycidyl benzoate, glycidyl propionate, glycidyl acetate, reacted in organic solvent and goal product were

先以苯甲酸钠、乙酸钠、丙酸钠和环氧氯丙烷为原料在相转移催化剂的作用下分别合成了苯甲酸缩水甘油酯、乙酸缩水甘油酯和丙酸缩水酯，经过减压蒸馏，得到相应的纯品；β-环糊精和苯甲酸缩水甘油酯、乙酸缩水甘油酯、丙酸缩水甘油酯在有机溶剂中反应，经过硅胶色谱柱分离，得到了相应的产品，产品经过TLC、IR、1H NMR、MS表征，并研究了温度、反应时间、催化剂等几个因素对反应工艺的影响，结果表明温度和催化剂对反应的快慢有较大影响。

Tritium in urine of tens of the workers in the course of the decommissioning is determinated by distillation and liquid scintillation counter, whose cncentration are 10 2～10 5 Bq/L and whose maximum concentration is 2.7×10 5 Bq/L, which is dose equivalent 0.19 mSv by counted.

用蒸馏和液体闪烁计数法测量了中国工程物理研究院核物理与化学研究所原工作地点核退役过程中直接接触氚和间接接触氚工作人员的尿样，氚浓度为 10 2 ～ 10 5Bq/L ，最大氚浓度为 2 7×10 5Bq/L ，折合剂量当量约为 0 19mSv。

Second, the upper ones of distillations below 150℃ and distillation ranging from 150℃ to 210℃ contain many kinds of useful organic compounds.

它具有较好的燃烧特性，但是因其粘度较大，在对燃料粘度要求不高的燃烧器中才可以应用。

The new OH stills at 1, 2 or 3 places enable the operator to perform one or more distillations at the same time with greater advantages than with a traditional distillation apparatus.

有1，2，3组使操作者在同一时间内可完成更多的蒸馏，比传统的蒸馏有更大的便利。

In the experiment distillation method is adopted and distillations in the different temperature range are collected.

组成成分分析采用色谱—质谱联用分析技术，得到生物质焦油及其馏分的组成成分；热动力学特性采用综合热分析仪进行研究，通过测定不同气氛和不同升温速率的热重曲线、微商热重曲线和差热曲线，定性分析生物质焦油及其馏分的蒸发和燃烧等特性，并定量求解热动力学参数。

The Koehler VDA3000 Vacuum Distillation System performs reduced pressure distillations of petroleum products in accordance with ASTM specifications.

Koehler的VDA3000真空蒸馏系统满足美国实验材料协会的规定，用以降低蒸馏压力。

Sterilization in desinfection chamber and subcultures of collections ;②confection of fermentation media and sterilization technics;③influences to objective produce altering the fermentable conditions ,including the examinations of the parameters about remnant sugar、pH、growth of microorganisms and produce;④separations and distillations of objective produces in fermented broth,the distillation technics of filter press and ion exchange;⑤brief and operation techniques of automatic fermentation tank.

课程内容：本课程主要实验内容：①微生物无菌室灭菌及种子扩大培养技术；②微生物发酵培养基及配制及灭菌技术；③微生物发酵及发酵条件的改变对目的产物代谢的影响，包括菌体生长、pH、残糖和产物等发酵过程中各项参数的检测；④发酵液中目的产物的分离及提纯，板框压滤离子交换提取技术；⑤自动发酵罐的简介及操作技术。

High vacuum (down to 0.067 kPa abs 0.01 psia) for vacuum distillation column and evaporator.

全球首家权威认证 SIL2 安全型变送器； 264， 268 系列已获船级认证。

Further, like most other cases such as gas/liquid membrane contactors, the overall mass transfer coefficients K of this novel membrane contactor in distillation decreased while fiber packing fractions became bigger, which presented a strong relationship between shell mass transfer and fiber packing fraction.

据此可作为膜接触器结构设计的判据，即当膜接触器填充密度较低时，其传质性能主要受中空纤维膜分布不均匀度影响；而当填充密度高时，组器结构对传质的主要影响因素应为沟流和死区。

Residence time detection is carried out for wiped film molecular distillation by the impulse response method.

文章采用脉冲示踪法测量了刮膜式分子蒸馏中物料的停留时间分布，研究了示踪剂浓度和电导率强度的关系及刮膜转速、进料速率和物料粘度对停留时间的影响，并与降膜式分子蒸馏停留时间作了比较。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。