this paper reports the improvement on the synthesis of 5 methylisoxazol 3 formamide by claisen condensation of diethyl oxalacetate followed by cyclization and ammonolysis.
讨论了以草酸二乙酯为原料,经过克莱森缩合、环合、氨解反应合成5 甲基异唑3甲酰胺工艺的改进。
the contact angles of formamide on the carbon fibres under n-alkane were measured by means of electrobalance and the surface free energy and its components of the fibres were obtained.
用电子天平法,以正烷烃-甲酰胺-炭纤维体系间接地求得了炭纤维的表面自由能及其分量。
that is to say, people can not touch the formamide essentially.
也就是说很少会真正接触到甲酰胺。
xrd, ft-ir results show that formamide was intercalated into the interlayer of kaolinite and the intercalated ratio can be affected by the reaction time.
ft-ir测试结果表明极性物质甲酰胺很好的插入层状黏土高岭土中,且插层率受反应时间影响显着。
this paper introduces the synthesis techniques of n, n - dimethyl formamide and the production situation in the world.
本文介绍二甲基甲酰胺的生产方法和国内外生产情况。
however, the formamide without any smelling , even it is heated to the evaporation temperature , it still will not produce any ammonia that can be smelt .
但是甲酰胺没有味道,加热到蒸发的温度也不会分解产生有味道的氨出来。
thermoplastic starch (tps) plasticized with mixture of urea and formamide (ufptps)could effectively restrain the starch retrogradation.
使用尿素和甲酰胺混合塑化剂制备的热塑性淀粉(ufptps)可以有效抑制淀粉的回生。
ethanol and formamide were determined by capillary column gas chromatography using fid detector . water was used as extracting solvent and n-butanol was used as internal standard.
采用水作萃取溶剂, 正丁醇作内标,毛细管柱气相色谱法测定伊维菌素中残留溶剂乙醇和甲酰胺的含量。
using potassium silicate as silicon source, formamide as catalyst, a series of silica xerogel monolithic columns with different consistencies were prepared.
以硅酸钾为硅源,甲酰胺为催化剂在毛细管内原位聚合形成干凝胶柱,制备了一系列致密度不同的整体柱。
optimal concentration range of iodine, sulphur dioxide formamide and ethylene glycol in the electrolyte is obtained.
并得到了卡尔·费休试剂配制的电解液中碘、二氧化硫、甲酰胺和乙二醇的最佳浓度范围。
formamide could effectively restrain the starch retrogradation.
结果表明甲酰胺可以有效抑制淀粉回生。
the esterifications of some kinds of carboxylic acids with n, n dimethyl formamide diisopropyl acetal(dmfdipa)are carried out.
以n,n-二甲基甲酰胺二异丙基缩醛(简称dmfdipa)为异丙基化试剂对一些羧酸进行酯化反应。