Epoxidation and oxidation gave the racemic C18-juvenile hormone. 通過環氧化和氧化就得到外消旋的含十八個碳的昆蟲返動激素。
Results show that the crack is mainly intergranular and there is no decarburization and oxidation at the edge of the crack. 根據齒座表面裂紋主要呈沿晶擴展,裂紋兩側無脫碳和氧化現象,認為該裂紋為淬火裂紋。