呋喃

A novel furan resin was synthesized by polycondensation between furfuralcohol and furfural.

用醇缩聚制备了新型呋喃树脂。

The average molecular weight of polyoxytetramethylene glycol could be flexibly controlled by varying the...

未反应的四氢呋喃经适当处理后可以回收循环使用。

Cu furaldehyde-ethylene diamine Schiff base complex was synthesized with the yield of 63.

合成了一种席夫碱金属络合物——呋喃乙二胺铜络合物,收率为63。

Dibenzofuran(DF) is one of the model compounds for the study of biodegradation of dioxin-like pollutants.

二苯并呋喃(DF)是研究二英类化合物生物降解的模式化合物之一。

Objective To explore the relationship between the illuminance and the observed order of reaction of photodegradation of nitrofurazone solution.

摘要目的研究呋喃西林水溶液光解反应的表反应级数光照度的关系。

Some new components were detected in the finished products, such as Hexanal, methyl-Cyclopentane, Heptanol, 2-Pentyl-Furan, Isophoron, and others.

阴干茶样中检测到的新增的香气成分：正己、基环戊烷、庚醇、2-正戊基呋喃、异佛尔酮。

Furfuryl propionate was synthesized from furfuryl alcohol and propionyl chloride using hexahydropyridine as catalyst and anhydrous sodium bicarbonate as acid-caputor.

以α呋喃醇丙酰氯为原料,以六氢吡啶为催化剂,无水碳酸氢钠为缚酸剂合成了α呋喃醇丙酸酯。

Carbasugars,carbocyclic analogues of true sugars,are compounds in which the ring-oxygen of furanoid or pyranoid sugars is replaced by methylene group.

碳环糖是一类呋喃或吡喃糖环中的氧原子基取代后形成的糖类似物。

Two production methods for preparing furan through decarbonylation of furfural were introduced: i.e. liquid phase reaction and gas phase reaction.

摘要介绍脱羰法制备呋喃的2种生产方法：液相法气相法。

119.0 g of cyclopentyl bromide and 19.4 g of magnesium are reacted in ether or THF to give a cyclopentyl Grignard reagent.

119克环戊溴19.4克镁在空气中或者四氢呋喃中加入环戊格林尼试剂作发生反应。

The two now isonicotnic acid hydrazone and N-oxide isonicotinic acid hydrazone of ethyl furoyl acetates were synthesised. The condensations were carried out in ethyl alochol medium.

合成了呋喃酰乙酸乙酯异烟酰腙呋喃酰乙酸乙酯N-氧化异烟酰腙。缩合反应在乙醇中进行。

Shell carbon black can be used to modify furane resin for significantly enhancing its electrostatic resistance and impact resistance,so that it is of greater suitability value.

采用谢尔炭黑改性呋喃树脂，能显著提高其抗静电、抗冲击性能，具有较大实用价值。

Compared with that of furane resin bonded sand,the feasibility of phenol resin bonded sand in forming a uniform coating layer in the inside mould surface is studied as well.

本文分析研究了砂在铸型中的成型条件及光洁内表面的形成机理，并对比研究了覆膜呋喃自硬砂在铸型内表面形成均匀覆砂层的可行性。