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In this paper, the structures of methylglyoxal and 1,1-dimethoxy-2-propanone are identified by GC-MS, NMR and the standard samples. The reaction conditions of catalyst oxidation and acetalation according to reaction mechanisms are discussed.

本文运用质谱、核磁和标样确定了中间体丙酮醛及其产物1，1-二甲氧基丙酮的结构，并结合反应机理对催化氧化和醛保护的反应工艺条件进行了探索。

Our research aims to discuss the rationality and the value of learner-centered education in botanical gardens in China .

为评价其在植物园科普教育应用中的效果，中科院西双版纳热带植物园围绕&以学习者为中心&的理念设计了一次尝试性的科普活动。