R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基.R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.蒸馏得质量分数高于98%的邻乙氧基苯甲酸,收率为92%.Distillation gave o ethoxybenzoic acid with 98 % of the p...
使集中集中或被聚集; 定位.To concentrate or be concentrated; localize.使集中,使聚合:使 ( 如光线 ) 集中在一中心点或向中心点集中; 集中.To cause ( light rays, for example ) to converge on or toward a central point; concentrate....
油气可以被捕集在背斜中,这类背斜盖在前三角洲基底中深埋了的土垒上.Hydrocarbons may be trapped in anticlines draped over deeply - buried horsts in the pre - deltaic basement.与储油圈闭有关的最一般的构造目标是背斜和断层.The most common structural targets associated with oil en...
Human cadavers were the only known source of hGH, and demand was intense.人类尸体是hGH已知的惟一来源, 而且需求广泛.Methods: The study included 113 shoulders from sixty - four cadavers.方法: 本研究包含了64具尸体的113个肩部.Methods: Cadavers were injected...