The condition of the production of chitosan from aspergillus by fermentation was studied.After using machine grind and hot alkaline and acid pre-treatment,the condition of chitosan extractin was made by orthogonal des...The condition of the production of chitosan from aspergillus by fermentation was studied.After using machine grind and hot alkaline and acid pre-treatment,the condition of chitosan extractin was made by orthogonal design.The method of treating with alkali was carried out at 100℃ and 12.50 mol/L alkaline concentration for 2 h,the yield of chitosan from dry aspergillus strain reached 7.75%.The chitosan of 90.00% deacetylate degree was produced by using high pressure(0.1 pound)and diluted alkali(7.50 mol/L)method.It can reduce alkaline dosage and the pollution of the environment.展开更多
目的了解8种常用化学消毒剂对黑曲霉菌的杀灭效果。方法用悬液定量杀菌试验法进行了观察。结果75%乙醇作用1 m in、4000 mg/L长链季铵盐作用5 m in、4000 mg/L聚醇醚碘作用45 m in、250 mg/L二氧化氯作用2.5 m in、3000 mg/L有效氯的84...目的了解8种常用化学消毒剂对黑曲霉菌的杀灭效果。方法用悬液定量杀菌试验法进行了观察。结果75%乙醇作用1 m in、4000 mg/L长链季铵盐作用5 m in、4000 mg/L聚醇醚碘作用45 m in、250 mg/L二氧化氯作用2.5 m in、3000 mg/L有效氯的84消毒液作用10 m in,对黑曲霉菌的杀灭对数值均>4.00。用8000 mg/L醋酸氯己定作用20 m in、5000 mg/L对氯间二甲苯酚作用30 m in、4000 mg/L聚维酮碘作用60 m in,对黑曲霉菌的杀灭对数值依次分别为0.60、0.86、0.83。结论在常规使用浓度下,乙醇、长链季铵盐、聚醇醚碘、二氧化氯和84消毒液对黑曲霉菌杀灭效果较好;醋酸氯己定、对氯间二甲苯酚、聚维酮碘对黑曲霉菌杀灭效果较差。展开更多
文摘The condition of the production of chitosan from aspergillus by fermentation was studied.After using machine grind and hot alkaline and acid pre-treatment,the condition of chitosan extractin was made by orthogonal design.The method of treating with alkali was carried out at 100℃ and 12.50 mol/L alkaline concentration for 2 h,the yield of chitosan from dry aspergillus strain reached 7.75%.The chitosan of 90.00% deacetylate degree was produced by using high pressure(0.1 pound)and diluted alkali(7.50 mol/L)method.It can reduce alkaline dosage and the pollution of the environment.
文摘目的了解8种常用化学消毒剂对黑曲霉菌的杀灭效果。方法用悬液定量杀菌试验法进行了观察。结果75%乙醇作用1 m in、4000 mg/L长链季铵盐作用5 m in、4000 mg/L聚醇醚碘作用45 m in、250 mg/L二氧化氯作用2.5 m in、3000 mg/L有效氯的84消毒液作用10 m in,对黑曲霉菌的杀灭对数值均>4.00。用8000 mg/L醋酸氯己定作用20 m in、5000 mg/L对氯间二甲苯酚作用30 m in、4000 mg/L聚维酮碘作用60 m in,对黑曲霉菌的杀灭对数值依次分别为0.60、0.86、0.83。结论在常规使用浓度下,乙醇、长链季铵盐、聚醇醚碘、二氧化氯和84消毒液对黑曲霉菌杀灭效果较好;醋酸氯己定、对氯间二甲苯酚、聚维酮碘对黑曲霉菌杀灭效果较差。
