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利用强电离放电等离子体制取活性氧(reactive oxygen species,ROS),将ROS溶液以喷淋方式喷出处理染有枯草芽孢杆菌黑色变种菌悬液的载体,通过试验考察pH值、溶液温度、喷淋时间、ROS溶液作用时间等因素对细菌芽孢悬液杀灭率的影响试验结果表明:碱性条件下枯草芽孢杆菌黑色变种快速杀灭率高于酸性条件;模... 相似文献
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大气压等离子体射流在不同气体环境内的维持与流动,必然导致射流工作气体与背景气体发生不同程度的混杂,从而影响等离子体射流特性。对于此问题,通过电学特性测量、发射光谱诊断等方法,比较了等离子体射流在不同气体环境下的射流形态、电学特性、放电产物,研究了空气、氮气、氩气、氦气4种背景气体对大气压氦等离子体射流特性的影响。结果显示:背景气体会介入大气压氦等离子体射流的演变过程,并导致等离子体射流特性改变;能与He发生彭宁电离的背景气体会促进大气压氦等离子体射流的发展,负电性气体和低激发态多的背景气体则会阻碍其发展;大气压氦等离子体射流若存在彭宁电离,则背景环境中稀有气体和空气等主要组成气体的电离能越高,大气压氦等离子体射流传播越远。 相似文献
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With the physical method of micro-gap gas discharge, OH. radicals were produced by the ionization of O2 in air and H2O in the gaseous state, in order to explore more effective method totreat the ship's ballast water. The surface morphology of Al2O3 dielectric layer was analysed using Atomic Force Microscopy (AFM), where the size of Al2O3 particles was in the range of 2 μm to 5 μm. At the same time, the biochemical effect of hydroxyl radicals on the introduced organisms and the quality of ship's ballast water were studied. The results indicate that the main reasons of cell death are lipid peroxide and damage of the antioxidant enzyme system in Catalase (CAT), Peroxidase (POD) and Superoxide dismutase (SOD). In addition, the quality of the ballast water was greatly improved. 相似文献
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在一些DBD系统中,经常出现随着激励频率的提高放电性能反而下降的反常现象。本文对DBD系统的频率特性进行了研究,结果表明:DBD系统存在谐振现象,激励电源的变压器漏感是引起这一现象的一个主要因素。 相似文献
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Using fogdrops of OH^· radicals to eliminate microbial contamination is an effective way to solve the current domestic and international problem. The results show that the threshold of OH solution used in the experiment is 0.6 mg/L, the lethal time is 1 s, and the spray density of OH solution is 21 μL/m^2. The experimental results show that the OH radical possesses the following advantages: celerity, low lethal concentration and spray density, short lethal time, and absence of secondary pollution. 相似文献
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