Ab initio UMP2 and UQCISD(T) calculations, with 6-311G** basis sets, were performed for the titled reactions. The result......

目的 为了改善肽核酸的理化和生物学性质,对经典肽核酸的结构进行衍生化和修饰.方法 采用Ugi四组分缩合反应进行PNA单体的合成并采......

羟基丁酸戊酸共聚酯（PHBV）的热稳定性差、加工过程降解严重,这成为阻碍其产业化加工推广的最主要因素。本文首先选用羟基封端的聚己......

稻壳的外表面覆盖有二氧化硅膜,使用传统的脲醛树脂(UF)和酚醛树脂胶(PF)生产的100%的稻壳板难以达到木质刨花板的质量指标.本研究......

α-Acyloxycarboxamides are synthesized from three-component Passerini reaction between indane-1,2,3-trione, isocyanides,......