臭氧——安全高效杀菌剂

臭氧作为杀菌剂广泛应用于各个领域,它以无残留、无污染、安全、高效等特点越来越引起人们的关注.     

How Business Interests and Government Inaction Led to the Humidifier Disinfectant Disaster in South Korea: Implications for Better Risk Governance

Humidifier sterilizers were regarded as innovative and health-promoting products; they were widespread in South Korea until 2011. However, hospitals reported mysterious deaths, and a legal investigation in April 2016 found that hundreds of people have died due to use of the sterilizing disinfectant. This article takes up that topic, discussing the government's role in dealing with the risk regarding the humidifier disinfectant. We pay particular attention to the unequal nature of the uncertainty produced by the distorted socioeconomic structure. Through in-depth interviews with key informants and an examination of relevant documents from the government, civic groups, and newspapers, we find that the government had increasingly acknowledged the risk, yet their inaction failed to stop the high number of casualties, and they have only recently responded proactively. The uncertainty of the risk was unevenly distributed between companies, the government, experts, and citizens. We argue that the proactive and transparent role of the government with the precautionary principle could fix the unequal structure of knowledge production and preserve public health.     

几种2—噻唑酮的杀菌效果比较

本文报道三个2－噻唑酮的化合物的杀菌效果。试验结果表明：个新的化合物（N－羟甲基－2－噻唑啉酮和N－羟甲基－2－噻唑硫酮）具有杀菌作用。     

气体二氧化氯用于空间消毒的评价

目的用商品化的生物指示剂确定气体二氧化氯达到空间灭菌水平所需消毒参数,同时评价环境湿度、有机干扰物、物体表面材料对气体二氧化氯消毒效果的影响。方法采用商品化及自制的枯草芽孢杆菌黑色变种芽孢（以下简称“枯黑芽孢”）菌片作为生物指示剂,对气体二氧化氯在不同消毒参数及实验条件下对微环境实验室消毒效果进行定性评价。结果环境湿度升高,气体二氧化氯杀灭芽孢作用显著增强,但湿度过大时光滑表面容易结露,金属表面产生轻微的腐蚀。根据商品化生物指示剂显示可以判定300ppm气体二氧化氯消毒3h基本可以达到空间灭菌水平;牛血清白蛋白能够明显影响气体二氧化氯对枯黑芽孢的杀灭作用;300ppm气体二氧化氯消毒4h能够完全杀灭滤纸枯黑芽孢菌片,但1000ppm气体二氧化氯消毒4h仍不能将不锈钢菌片或棉布茵片完全杀灭。结论气体二氧化氯消毒时环境相对湿度控制在75％左右为宜;商品化的生物指示剂并不能完全准确地指示气体二氧化氯空间消毒结果,应根据消毒空间内物体表面材料的不同及有机干扰物的存在与否相应增加气体二氧化氯浓度及消毒时间。