常見例句R" is a replaceable function, e. g. acetoxy, methoxy, their acyloxy and alkoxy homologs or halo. R”是取化基,如乙氧基、甲氧基及它們的環(huán)氧和烷氧同系物或鹵基。R " is a replaceable function, e. g. acetoxy, methoxy, their acyloxy and alkoxy homologs or halo. 是取化基,如乙氧基、甲氧基及它們的環(huán)氧和烷氧同系物或鹵基。Acetoxy ethyl cellulose(AEC), benzoxy ethyl cellulose(B?2EC) and benzoxy cellulose(B?2C) were prepared by ester reaction with cellulose or hydroxyethyl cellulose as raw material. 以纖維素或羥乙基纖維素爲(wèi)原料,通過(guò)酯化反應(yīng)制備了乙醯氧乙基纖維素(AEC)、苯甲醯氧乙基纖維素(B2EC)和苯甲醯氧纖維素(B2C)。The lowering of the water sorption of the epoxy coating by replacing the hydroxyl groups in the coating with acetoxy groups has been studied using electrochemical impedance spectroscopy. 降低固化環(huán)氧樹脂吸水性能是提高其可靠性與壽命的重要前提之一。7- amido acetoxy eicosanoic acid 7-氨基乙醯氧基頭孢烷酸Determination of 7 - amido acetoxy eicosanoic acid by ultraviolet spectrophotometric method 紫外分光光度法測(cè)定7-氨基乙醯氧基頭孢烷酸的含量 返回 acetoxy