简介:创记录地以415米的高度耸入支霄的“双子塔”工程于1966年开始破土动工。其后双历时数年才建立起来。由于面临着一个空前的建筑高度,建筑师山崎实与约翰·斯奇林和莱斯·罗伯逊等工程师采用了由密距钢柱构成的坚硬“空管”结构。
简介:ThepreparationoftwotypesofmolecularsievesAlPO4-11andMAPO-11isreported.Theparticlesizeofthelatterishundredsofmicrons,about10timeslargerthanthatoftheformer.TheXRD,IRandDTAspectrahavedemonstratedthatmagnesiumhasbeenintroducedintotheframeworkofAlPO4-11.ThesuccessfulpreparationoflargesinglecrystalofMAPO-11willopenupanewareaforthepreparationoflargemolecularsievescrystalsinthefuture.ThelargeMAPO-11crystalcompoundisapromisinghostforthehost-guestassemblyofcompositematerials.