查询词典 distillation

It is found that UIFR with softening point of 90℃, OH value of 32mg KOH/g andM of 377 g/mol is synthesized when molar ratio of isobutyraldehyde to formaldehyde is 1.5, molar ratio of aldehyde to urea is 6, vacuum distillation temperature and time is 140℃ and 1 h respectively. The terpolycondensate is soluble in most solvents, of paints and exhibits excellent yellowing-resistance.

结果表明，在异丁醛、甲醛摩尔比为1.5，醛、脲摩尔比为6，真空蒸馏温度为140℃、时间为1h的条件下，合成出的UIFR软化点为90℃，羟基值为32mgKOH/g，M为377g/mol，且树脂具有良好的溶解性和杭黄变性。

And the basic factors controlling the isotopic distillation are the temperature and the ratio of water to rock action.

控制同位素分馏的基本因素是温度及水岩比值。

Juglone product was isolated and-depurated from bark of Juglans mandshurica byultrasonic .method and vacuum distillation.

4高纯度和高得率胡桃醌产品的分离纯化及结构表征。

Juglone product was obtained from bark of J. mandshurica by ultrasonic extraction and vacuum distillation, and the yield of product was 0.09%. The product was characterized by FT-IR, GC-MS and 1H NMR.

研究采用超声波辅助浸提和减压蒸馏等方法，从核桃楸树皮中提取制得胡桃醌产品，产品得率0.09%。

The design of NESC uses many system engineering methods such as latticing components by application and technology, distillation of system functions, partial encapsulation and system delamination, all of which can help to design the components reasonably, simplify relationship, enhance runtime efficiency, improve the universality of software components, and purify the concept and structure of application systems.

框架体系结构设计通过应用-技术二维划分、功能提取、局部封闭和全局分层等技术实现，可望达到合理规划设计构件，简化依赖关系，提高运行效率，增强构件通用性以及清晰应用系统概念和结构的目的。

The products prepared by esterification of glycerol and lauric acid followed by molecular distillation have lauric acid, glycerol and other impurities.

月桂酸单甘油酯是用途广泛的食品添加剂，在其制备过程中经分子蒸馏得到的制备品中会有月桂酸、甘油等杂质。

The traditional separation and purification process of levulinic acid was consisted of solvent extraction and high vaccumn distillation, which was low in product recovery, high in energy consumption and complex in process operation.

传统的乙酰丙酸分离提取工艺以有机溶剂萃取和真空精馏为核心，乙酰丙酸的回收率低、能耗高、工艺复杂，成了制约工业化生产的主要因素。

The technology of refining α-linolenic acid by wiped film molecular distillation has been studied.

本文应用刮膜式分子蒸馏装置对α-亚麻酸的提纯进行了研究。

METHODS The volatile oil was obtained from Mallotus apelta by steam distillation.

方法采用水蒸气蒸馏法提取白背叶中的挥发油。

Duration of distillation is one of the important factors affecting quality and yield of the essential oil of Melaleuca alternifolia .

蒸馏的持续时间是影响互叶白千层精油质量及出油率的重要因素之一。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。