【摘要】 该文提出了一种用纳米 PbO₂/AgO 修饰电极和大肠杆菌微生物组成的微生物传感器,通过大肠杆菌在电极上被氧化产生的电流大小,建立新颖、快速测定大肠杆菌数的新方法。在上述基础上设计了能评估纳米氧化物紫外屏蔽性能优劣的方法,讨论了紫外光照条件下大肠杆菌在有无纳米氧化物紫外屏蔽剂时存活率的变化。经研究发现纳米氧化物存在时,大肠杆菌的存活率明显高于不使用屏蔽剂时的存活率,说明纳米氧化物具有保护微生物免受紫外线损伤的作用,为纳米氧化物的紫外屏蔽性能评估提供了一种新的电化学方法。更多还原

【Abstract】 A microbial sensor composed of nanostructured PbO₂/AgO modified electrode and E.coli was proposed in this work. By determing the oxidation current of E.coli,a novel and rapid method was set up to detect the number of E.coli.Based on this,the method to evaluate the UV-shielding capacity of different nano-oxides was designed and the survival ratio of E.coli was discussed with or without UV-shielding under UV light.The results in our experiment showed that the survival ratio with UV-shielding was much bigger than that without UV-shielding,which indicated that nano-oxides can protect microbes from UV light,and so this novel method shows to be a promising way for UV- shielding capacity evaluation.更多还原