N, N - Diisopropylethylamine ( DIPEA ) was prepared from diisopropylamine ( DIPA ) and diethyl sulfate ( Et _ 2 SO _ 4 ).以二异丙胺 ( DIPA ) 、硫酸二乙酯 ( Et2SO4 ) 为原料合成N, N二异丙基乙基胺 ( DIPEA ).Objective The study of effect of Diisop...
头层全粒面起毛牛皮和1200丹尼尔尼龙网布联合构成的靴面.Combination of full grain Suede leather and 1200 denier nylon upper.头层全粒面牛皮和1200丹尼尔尼龙网布联合构成的靴面.Combination of full grain leather and 1200 denier nylon upper....
Is he really considering a renewal of hostilities at this stage?他真的在考虑在这个阶段恢复敌对状态吗?Now it is spring, a time of renewal.现在是春天,万物重生的季节。His contract came up for renewal.他的合同该续签了。...
Brick rubble is useful as the base for paths and patios.碎砖石可以用来铺路基和庭院地基。Concrete slab for making pathways or patios.用于建造通道或天井的混凝土板.The program a progressive manner interrupted by patios and gardens in between activities....
建立了海产品中的溴酚类海洋风味素的毛细管气相色谱 - 质谱联用检测法.A sensitive analytical method of bromophenol - like marine flavors has been established using capillary gas chromatography - mass spectrometry....