查询词典 cyclopentane

Sterol is a kind of substance of full cyclopentane hydrogen skeleton, and exists in the nature in free form and binding form.

甾醇是环戊烷全氢匪为骨架的一种物质，在自然界中以游离态和结合形式存在。

At the same time, it was indicated that HFC-134a/cyclopentane could behave as non-azeorotropic mixed gas hydrate.

同时实验结果也表明，HFC-134a/环戊烷可以形成非共沸气体水合物。

The rationality and economy of reformation for PU foaming machinery using cyclopentane as foaming agent were introduced.

阐述了采用环戊烷替代CFC-11发泡剂的聚氨酯发泡机改造的合理性和经济性。

Two routes have been developed to explore a more feasible synthesis of multifounctional cyclopentane.

目前的工作已从两条路线对如何高效地创建手性纯五元环进行了研究。

Experiment results indicated that the foaming flowability of polymeric MDI was almost independent of 2,4'-MDI content in both CFC and cyclopentane foaming systems, but increase in 2,4'-MDI content resulted in linear rise of demoulding deform...

实验结果表明，当聚合MDI与 2种组合聚醚进行发泡时，2 ，4' MDI含量对聚合MDI的发泡流动性影响较小，而对后熟化性能的影响明显，随 2 ，4' MDI含量的增加，脱模变形呈直线上升的趋势。

Because cyclopentane is a flammable and explosive substance,the station with large quantity of it belongs to major hazard installation .

广东科龙集团无氟生产线中的预混站是使用环戊烷危险物品配制发泡剂的重大危险源，燃烧爆炸事故风险较大。

The experimental facts have been found as follows:(1) The hydrogeno-lysis of cyclopentane on Pt/Al2O3 and Pt-Ti/Al2O3 takes place at clouble atom sites.

这可能是因为催化剂还原时生成的Ti~或Ti~0对Pt所起的集团效应和电子配位体效应的结果。

Application of isopentane /cyclopentane foamed rigid polyurethane in refrigerators is introduced.

介绍碳氢发泡新一代替代技术：环戊烷-异戊烷发泡聚氨酯硬泡技术在冰箱生产中的应用情况，并从发泡工艺及性能上与环戊烷发泡体系进行了比较。

The cyclopentane was study by EMS. The valance orbital can not be entirely distinguished, due to the energy resolution of the spectrum, but the detailed information of the momentum profiles can be obtained by theoretical calculation.

对环戊烷分子的电子动量谱学研究受谱仪分辨率的限制，从电离能谱中不能分辨环戊烷分子的每一轨道，但理论计算可以得到各价轨道的束缚能、电子动量谱等信息。

The Cyclopentane high-pressure foaming machine have gas monitoring points,ventilation and exhausting system,.

环戊烷高压发泡机应用于环戊烷发泡生产，配有安全监测及抽风系统。

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％。