Dependence of NOx Removal by Pulsed Streamer Discharge on the Input Energy Density to Nitric Oxide Ratio

2005 ◽  
Vol 8 (2) ◽  
Author(s):  
Douyan Wang ◽  
Takao Namihira ◽  
Sunao Katsuki ◽  
Hidenori Akiyama
Keyword(s):  
Nitric Oxide ◽  
Atmospheric Pressure ◽  
Pulsed Power ◽  
Flue Gases ◽  
Input Energy ◽  
Streamer Discharge ◽  
No Removal ◽  
Oxide Ratio ◽  
Non Thermal Plasma ◽  
Input Energy Density

AbstractNon-thermal plasma produced by pulsed power discharges in atmospheric pressure gases have been studied for the treatment of exhaust gases. In this paper, results are reported of short duration of tens of nanoseconds pulsed power applied to a mixture of nitric oxide (NO), nitrogen, oxygen, and water vapor, simulating flue gases to remove nitrogen oxide (NOx). The effects of the initial NO concentration and the pulsed repetition rate on the percentage of NO removal are reported. The results showed that all NO could be removed completely at different pulse repetition rates. NO removal ratio reached 100% at (3.2 ± 0.1) × 10

scholarly journals Cold Atmospheric Pressure Plasma-Activated Medium Induces Selective Cell Death in Human Hepatocellular Carcinoma Cells Independently of Singlet Oxygen, Hydrogen Peroxide, Nitric Oxide and Nitrite/Nitrate

2021 ◽  
Vol 22 (11) ◽  
pp. 5548
Author(s):  
Yan Li ◽  
Tianyu Tang ◽  
Haejune Lee ◽  
Kiwon Song
Keyword(s):  
Nitric Oxide ◽  
Cell Death ◽  
Singlet Oxygen ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Proliferative Effect ◽  
Huh7 Cells ◽  
Anti Cancer ◽  
Cold Atmospheric Pressure Plasma ◽  
Nitrite Nitrate

Cold atmospheric pressure plasma (CAP) and plasma-activated medium (PAM) induce cell death in diverse cancer cells and may function as powerful anti-cancer agents. The main components responsible for the selective anti-cancer effects of CAP and PAM remain elusive. CAP or PAM induces selective cell death in hepatocellular carcinoma cell lines Hep3B and Huh7 containing populations with cancer stem cell markers. Here, we investigated the major component(s) of CAP and PAM for mediating the selective anti-proliferative effect on Hep3B and Huh7 cells. The anti-proliferative effect of CAP was mediated through the medium; however, the reactive oxygen species scavenger N-acetyl cysteine did not suppress PAM-induced cell death. Neither high concentrations of nitrite or nitrite/nitrate nor a low concentration of H2O2 present in the PAM containing sodium pyruvate affected the viability of Hep3B and Huh7 cells. Inhibitors of singlet oxygen, superoxide anions, and nitric oxide retained the capacity of PAM to induce anti-cancer effects. The anti-cancer effect was largely blocked in the PAM prepared by placing an aluminum metal mesh, but not a dielectric PVC mesh, between the plasma source and the medium. Hence, singlet oxygen, hydrogen peroxide, nitric oxide, and nitrite/nitrate are not the main factors responsible for PAM-mediated selective death in Hep3B and Huh7 cells. Other factors, such as charged particles including various ions in CAP and PAM, may induce selective anti-cancer effects in certain cancer cells.

scholarly journals Urinary leukotriene E4/exhaled nitric oxide ratio and montelukast response in childhood asthma

2010 ◽  
Vol 126 (3) ◽  
pp. 545-551.e4 ◽  
Author(s):  
Nathan Rabinovitch ◽  
Nora J. Graber ◽  
Vernon M. Chinchilli ◽  
Christine A. Sorkness ◽  
Robert S. Zeiger ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Childhood Asthma ◽  
Exhaled Nitric Oxide ◽  
Oxide Ratio

scholarly journals RESEARCH OF INFLUENCE OF AIR TEMPERATURE ON THE LEVEL OF NITROGEN OXIDES IN SMOKE GASES OF BOILER PLANTS

2019 ◽  
Vol 9 (4) ◽  
pp. 27-32
Author(s):  
Olga A. BALANDINA ◽  
Svetlana M. PURING
Keyword(s):  
Mathematical Modeling ◽  
Nitric Oxide ◽  
Nitrogen Oxides ◽  
Flue Gas ◽  
Software Package ◽  
Flame Temperature ◽  
Combustion Process ◽  
Flue Gases ◽  
Oxidizing Agent ◽  
Mixture Formation

The analysis of the values of the concentrations of the formed nitrogen oxides and the temperatures of the jet plume under various conditions of mixture formation is carried out. The plots of the distribution of torch temperatures and concentrations of nitric oxide in the calculated area for oxidizer temperatures of 20, 60, 100, 150, and 200 ° C were obtained and analyzed. Mathematical modeling of the gaseous fuel combustion process was carried out using the FlowVision software package. An analysis of the results showed that a decrease in the temperature of the air supplied as an oxidizing agent leads to a significant decrease in the concentration of nitrogen oxides in flue gases, while not significantly affecting the change in the flame temperature. The research results can be used to solve the problems of optimizing boiler plants, in order to reduce harmful flue gas emissions. Further modeling is planned to determine the dependence of the influence of various factors on the degree of formation of nitrogen oxides in the flue gases of boiler plants.

scholarly journals The influence of argon gas flow in the killing of staphylococcus epidermidis bacteria

2018 ◽  
Vol 16 (36) ◽  
pp. 134-139
Author(s):  
Ahmed Mahmoud Shihab
Keyword(s):  
Staphylococcus Epidermidis ◽  
Atmospheric Pressure ◽  
Gas Flow ◽  
Biotechnological Applications ◽  
Plasma System ◽  
Argon Gas ◽  
Killing Rate ◽  
Normal Atmospheric Pressure ◽  
Non Thermal Plasma

In this research, non-thermal plasma system of argon gas is designed to work at normal atmospheric pressure and suitable for work in medical and biotechnological applications. This technique is applied in the treatment of the Staphylococcus epidermidis bacteria and show the role of the flow rate of Argon gas on the killing rate of bacteria, and it obtained a 100 % killing rate during the time of 5 minutes at the flow Argon gas of 5 liters/ min.

scholarly journals Influence of non-thermal argon plasma needle on blood coagulation

2019 ◽  
Vol 14 (29) ◽  
pp. 101-106
Author(s):  
Kadhim A. Aadim
Keyword(s):  
Blood Coagulation ◽  
Power Supply ◽  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Experimental Setup ◽  
Argon Gas ◽  
Ac Power ◽  
Plasma Needle ◽  
Electric Component ◽  
Non Thermal Plasma

Non-thermal argon plasma needle at atmospheric pressure wasconstructed. The experimental setup was based on a simple and lowcost electric component that generates a sufficiently high electricfield at the electrodes to ionize the argon gas which flow atatmospheric pressure. A high AC power supply was used with 1.1kV and 19.57 kHz. Non-thermal Argon plasma used on bloodsamples to show the ability of non-thermal plasma to promote bloodcoagulation. Three tests have been done to show the ability of plasmato coagulate both normal and anti-coagulant blood. Each bloodsample has been treated for varying time from 20sec. to 180sec. atdifferent distances. The results of the current study showed that thecold plasma produced from argon significantly increase the in vitrospeed of blood coagulation, the plasma increases activation andaggregation of platelets, causes proliferation of fibroblasts and fibrinproduction accelerates blood coagulation.

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