quaternarycoden.四进制代码quaternaryadj.第四纪的；四的；四进制的n.四；四进制；第四纪QUATERNARY GLACIATION IN SHENNONGJIA神农架地区第四纪冰川遗迹与冰期划分quaternary ammonium spasmolytic drug季铵类解痉药quaternary ammonium phosphotungstate磷钨酸季铵盐quaternary ammonium polymetaphosphate聚偏磷酸季铵盐Quaternary ammonium Gemini surfactant季铵盐型Gemini表面活性剂quaternary ammonium hexafluorosilicate六氟硅酸季铵盐Quaternary ammonium Gemini surfactants季铵盐型Gemini表面活性剂quaternary alkoxypropyl ammonium halide四烷氧基丙基卤化铵quaternary ammonium his - imidazoline双咪唑啉季铵盐quaternary ammonium cationic surfactant季铵盐型阳离子表面活性剂

1. Using lignin exstracted from papermaking black liquor as a raw material,the synthesis of a quaternary ammonium salt of lignin has been carried out.
   以从造纸黑液中提取的木质素为原料，合成木素季胺盐絮凝剂。
2. Quaternary ammonium salts of bisamides and quaternary ammonium salt cationic surfactant of imi_dazoline were synthesized and the content of cations was determined.
   合成了双酰胺类季铵盐和咪唑啉型季胺盐阳离子表面活性剂，并进行了阳离子含量测定。