Many biologically important organic compounds ( sugars and amino acids) possess at least one asymmetric carbon atom and therefore occur in two isomeric forms for the amino acid molecule. 许多对生物重要的有机化合物(糖和氨基酸)存在着至少一种非对称碳原子,并因此使这个氨基酸分子产生了两个同分异构体。
The asymmetric atom dictionaries are selected as over-complete atoms of image sparse decomposition. 为了保证图像稀疏分解有良好的视觉效果,本文选择的过完备原子库是非对称原子库。
Recently, asymmetric organic catalysis has been the most important and interesting research topic in organic chemistry because of metal-free, environmentally benign and high atom economy. 近年来,有机不对称催化由于其无需金属参与,对环境友好,原子经济性较高,越来越受到有机化学家的关注。