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用化学肥料及化学药品作为降温剂来保存疫苗,已有资料报道①、②、③,为了进一步证实和寻求最适降温浓度,以便在农村防灾工作中实际应用,特进行本試驗。一、試驗材料1.硝酸銨:吉林省化学公司化肥厂制造,速搭牌,1964年7月出品,粗制农业化肥,含氮34%。2.尿素:挪威进口,维金船牌,农业用化肥,含氮46%。3.硝酸銨:合肥化学工业学校试剂厂出品,分析纯,批号60·1004,含氮34%。4.氯化铵:国营上海試剂厂出品,批号
The use of chemical fertilizers and chemical drugs as a cooling agent to save the vaccine, there are data reported ①, ②, ③, in order to further confirm and seek the optimal concentration of cooling in order to practical application in rural disaster prevention work, special conduct this experiment. First, the test materials 1 ammonium nitrate: Jilin Chemical Company fertilizer plant, speed take license, produced in July 1964, crude agricultural fertilizers, nitrogen 34%. 2. Urea: Norway imports, Victoria gold license plate, agricultural fertilizers, nitrogen 46%. 3. Ammonium nitrate: Hefei Chemical Industry Reagent Factory produced, analytical grade, batch number 60 1004, nitrogen 34%. 4. Ammonium chloride: state-run Shanghai Reagent Factory produced, batch number