呋喃

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

用糠醇和糠醛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...

未反应呋喃经适当处理后可以回收循使用。

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——呋喃甲醛乙二胺铜络合物,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)研究二英类化合物生物降解模式化合物之一。

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

摘要目研究呋喃西林水溶液光解反应表反应级数和光照度关系。

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

阴干茶样中检测到新增香气成分：正己醛、甲基戊烷、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呋喃甲醇和丙酰氯为原料,以六吡啶为催化剂,无水碳酸钠为缚酸剂合成了α呋喃甲醇丙酸酯。

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

碳一类呋喃或吡喃中氧原子被亚甲基取代后形成类似物。

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

摘要介绍糠醛脱羰法制备呋喃2种生产方法：液相法和气相法。

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克戊溴和19.4克镁在空气中或者呋喃中加入戊格林尼亚试剂作发生反应。

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.

合成了呋喃甲酰乙酸乙酯异烟酰腙和呋喃甲酰乙酸乙酯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成型条件及光洁内表面形成机理，并对比研究了覆膜和呋喃自硬砂在铸型内表面形成均匀覆砂层可行性。