In this study, micro-hollow cathode discharge （MHCD） is investigated by a fluid model with drift-diffusion approximation. The MHC device is a cathode/dielectric/anode sandwich structure with one hole of a diameter D...In this study, micro-hollow cathode discharge （MHCD） is investigated by a fluid model with drift-diffusion approximation. The MHC device is a cathode/dielectric/anode sandwich structure with one hole of a diameter D=200 um. The gas is a Ne/Xe mixture at a pressure p=50-500 Torr. The evolutions of the discharge show that there are two different discharge modes. At larger pD the discharge plasma and high density excited species expand along the cathode surface and, a ringed discharge mode is formed. At smaller pD, the discharge plasma and the excited species expand along the axis of the cathode aperture to form a columnar discharge.展开更多
Considering the feature of distributions of parameters within the micro-hollow cathode discharge, we use a simple method to separate the sheath region characterized by drastic changes of plasma parameters and the bulk...Considering the feature of distributions of parameters within the micro-hollow cathode discharge, we use a simple method to separate the sheath region characterized by drastic changes of plasma parameters and the bulk plasma region characterized by smooth changes of plasma parameters. A zero-dimensional chemical kinetic model is used to analyze the dissociation mechanism of CO2 in the bulk plasma region of a micro-hollow cathode discharge and is validated by comparisons with previous modeling and experimental results. The analysis of the chemical kinetic processes has shown that the electron impact dissociation and heavy species impact dissociation are dominant in different stages of the rnicro-hollow cathode discharge process for a given applied voltage. The analysis of energy consumption distributions under different applied voltages reveals that the main reason of the conversion improvement with the increase of the applied voltage is that more input energy is distributed to the heavy species impact dissociation.展开更多
Objective To explore the effect of Modified Hangqi Chifeng Decoction(MHCD)on levels of collagen typeⅣ(ColⅣ),matrix metalloproteinase-2(MMP-2),tissue inhibitor of metalloproteinase-2(TIMP-2)in extracellular matrix(EC...Objective To explore the effect of Modified Hangqi Chifeng Decoction(MHCD)on levels of collagen typeⅣ(ColⅣ),matrix metalloproteinase-2(MMP-2),tissue inhibitor of metalloproteinase-2(TIMP-2)in extracellular matrix(ECM)of glomerular mesangial cells(GMCs)in LPS induced mice.Methods Normal serum and telmisartan,high,medium,low dose MHCD containing展开更多
基金The subject was financed by the state studing abroad scholarship fund of Doctoral College of France-China to pursue the microdischarge study in the Joseph Fourier University.
基金supported by National Natural Science Foundation of China （No. 11005009）
文摘In this study, micro-hollow cathode discharge （MHCD） is investigated by a fluid model with drift-diffusion approximation. The MHC device is a cathode/dielectric/anode sandwich structure with one hole of a diameter D=200 um. The gas is a Ne/Xe mixture at a pressure p=50-500 Torr. The evolutions of the discharge show that there are two different discharge modes. At larger pD the discharge plasma and high density excited species expand along the cathode surface and, a ringed discharge mode is formed. At smaller pD, the discharge plasma and the excited species expand along the axis of the cathode aperture to form a columnar discharge.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11575019 and 11275021
文摘Considering the feature of distributions of parameters within the micro-hollow cathode discharge, we use a simple method to separate the sheath region characterized by drastic changes of plasma parameters and the bulk plasma region characterized by smooth changes of plasma parameters. A zero-dimensional chemical kinetic model is used to analyze the dissociation mechanism of CO2 in the bulk plasma region of a micro-hollow cathode discharge and is validated by comparisons with previous modeling and experimental results. The analysis of the chemical kinetic processes has shown that the electron impact dissociation and heavy species impact dissociation are dominant in different stages of the rnicro-hollow cathode discharge process for a given applied voltage. The analysis of energy consumption distributions under different applied voltages reveals that the main reason of the conversion improvement with the increase of the applied voltage is that more input energy is distributed to the heavy species impact dissociation.
文摘Objective To explore the effect of Modified Hangqi Chifeng Decoction(MHCD)on levels of collagen typeⅣ(ColⅣ),matrix metalloproteinase-2(MMP-2),tissue inhibitor of metalloproteinase-2(TIMP-2)in extracellular matrix(ECM)of glomerular mesangial cells(GMCs)in LPS induced mice.Methods Normal serum and telmisartan,high,medium,low dose MHCD containing
