该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......

将一系列不同结构的离子液体与雷尼镍复合,作为甘油氢解制备丙二醇反应的催化剂。考察了离子液体结构对催化性能的影响,优选出具有......

The production of propylene carbonate(PC)from urea and 1,2-propanediol(PG)was investigated in a batch process.The cataly......

A practical chemical synthesis of L-carnitine (1) has been accomplished from (R)-3-chloro-l,2-propanediol ((R)-4), which......