Direct-current(DC)arc plasma has great application values in the field of the chemical industry,but it has the problem of low energy efficiency.Facing the requirement for improving the energy efficiency of the arc,thi...Direct-current(DC)arc plasma has great application values in the field of the chemical industry,but it has the problem of low energy efficiency.Facing the requirement for improving the energy efficiency of the arc,this paper proposes a unique method of pulsed modulated arc(PMA).This method uses high-frequency pulses and reduces the arc current to improve the control of electron temperature.The electrical characteristics,optical characteristics and products are tested.The test results show that during the PMA process,all of the experimental results which include voltage,current and light will significantly increase.These results are analyzed from the perspective of functionality,repeatability and energy conversion.The analysis results show that although the PMA method does not show good parameter consistency,it has potential application prospects because it increases the energy conversion rate by 4.5%and 8%from the perspective of light and products,respectively.展开更多
在9%(w/v)NaCl条件下,通过温度、pH两种因素诱导一株单增李斯特菌进入"活的非可培养"(viable but non-cuturable,VBNC)状态。通过LIVE/DEAD Baclight活菌检测试剂盒检测细菌总数与活菌数,比较单增李斯特菌状态及数量的差异与...在9%(w/v)NaCl条件下,通过温度、pH两种因素诱导一株单增李斯特菌进入"活的非可培养"(viable but non-cuturable,VBNC)状态。通过LIVE/DEAD Baclight活菌检测试剂盒检测细菌总数与活菌数,比较单增李斯特菌状态及数量的差异与变化。结果显示,在2℃、pH6.0条件下单增李斯特菌活菌全部进入VBNC状态。用PMA-qPCR对经诱导的四份菌液进行检测,结果表明该方法能快速、准确地测出死菌背景下的活的单增李斯特菌。展开更多
基金supported by National Natural Science Foundation of China(No.52177135)the National Science and Technology Major Project of China(Nos.2017-Ⅲ-0007-0032,2019-Ⅲ-0013-0056)。
文摘Direct-current(DC)arc plasma has great application values in the field of the chemical industry,but it has the problem of low energy efficiency.Facing the requirement for improving the energy efficiency of the arc,this paper proposes a unique method of pulsed modulated arc(PMA).This method uses high-frequency pulses and reduces the arc current to improve the control of electron temperature.The electrical characteristics,optical characteristics and products are tested.The test results show that during the PMA process,all of the experimental results which include voltage,current and light will significantly increase.These results are analyzed from the perspective of functionality,repeatability and energy conversion.The analysis results show that although the PMA method does not show good parameter consistency,it has potential application prospects because it increases the energy conversion rate by 4.5%and 8%from the perspective of light and products,respectively.
文摘在9%(w/v)NaCl条件下,通过温度、pH两种因素诱导一株单增李斯特菌进入"活的非可培养"(viable but non-cuturable,VBNC)状态。通过LIVE/DEAD Baclight活菌检测试剂盒检测细菌总数与活菌数,比较单增李斯特菌状态及数量的差异与变化。结果显示,在2℃、pH6.0条件下单增李斯特菌活菌全部进入VBNC状态。用PMA-qPCR对经诱导的四份菌液进行检测,结果表明该方法能快速、准确地测出死菌背景下的活的单增李斯特菌。
