简介:ELTisanorganicprocessthatisinfluencedbyavarietyoffactors.Thesebreakdownintotwotypes:explicit,whichisobjectiveandtheotherisimplicit,whichissubjective.Thispaperarguesthatsubjectivefactorsaresubordinatedtoobjectiveones.Ofthelat-ter,theSocietyfactor,followedbytheSubjectandStudentfactorsinimportance,isthecentralonethatdeterminestheteachingprocess.
简介:研究了用3,3'-己烷基撑-双-(1-苯基-4-乙酯基-5-吡唑酮)的氯仿溶液在稀硝酸介质中对稀有元素铪的萃取行为。确定了萃合物中铪与萃取剂之比为1:2,分子组成为HfA2,萃取反应为阳离子交换-配位机理,条件萃取平衡常数为1.75×104,萃合物的分子为螯合结构。