Interaction of Nitrogen Oxides with Sublimed Layers of (meso-Tetraphenylporphyrinato)cobalt(II); IR Evidence of Oxo-Transfer from (Nitro)porphyrinatocobalt(III) to Free Nitric Oxide

2003 ◽  
Vol 42 (25) ◽  
pp. 8489-8493 ◽  
Author(s):  
Tigran S. Kurtikyan ◽  
Arthur N. Mardyukov ◽  
John A. Goodwin
Keyword(s):  
Nitric Oxide ◽  
Nitrogen Oxides ◽  
Sublimed Layers ◽  
Oxo Transfer

Reduction of Nitrogen Oxides by Injecting Nitric Oxide into a Hydrogen Engine: A Micro-kinetic Analysis

2021 ◽  
Vol 14 (4) ◽  
Author(s):  
Suhani Agarwal ◽  
Vaibhav Srivastava ◽  
Pranav V. Kherdekar ◽  
Divesh Bhatia
Keyword(s):  
Nitric Oxide ◽  
Nitrogen Oxides ◽  
Kinetic Analysis

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.

NITRIC OXIDE AND NITROGEN OXIDES

2006 ◽  
pp. 161-169
Author(s):  
H. Meurs ◽  
H. Maarsingh ◽  
J. Zaagsma
Keyword(s):  
Nitric Oxide ◽  
Nitrogen Oxides

Transport and interaction of nitrogen oxides and NO2 with CO2-HCO3- transporters in pancreatic acini

1994 ◽  
Vol 267 (2) ◽  
pp. C385-C393 ◽  
Author(s):  
H. Zhao ◽  
X. Xu ◽  
K. Ujiie ◽  
R. A. Star ◽  
S. Muallem
Keyword(s):  
Nitric Oxide ◽  
Nitrogen Oxides ◽  
Acinar Cells ◽  
Cellular Proteins ◽  
Pancreatic Acinar Cells ◽  
Disulfonic Acid ◽  
No Production ◽  
Pancreatic Acini ◽  
Cytosolic Acidification ◽  
Stimulation Of

Recently, we showed that NO2- increases gap junction (GJ) permeability and synchronizes intracellular Ca2+ concentration oscillations in pancreatic acini (Loessburg et al., J. Biol. Chem. 268: 19769-19775, 1993). NO2- is also an end product of nitric oxide (NO) production and metabolism. Because of the effect of NO2- on GJ permeability and the possible importance of NO2- in NO metabolism and cytotoxicity, we used pancreatic acinar cells and intracellular pH (pHi) measurements to study the interaction of nitrogen oxides and NO2- with cellular proteins. Exposing cells to NO2- resulted in a concentration-dependent cytosolic acidification. The acidification did not require the transport of NO2- and was not mediated by diffusion of HNO2. Because the acidification was prevented by CO2-HCO3- and inhibition of carbonic anhydrase, it is possible that other nitrogen oxides present in a solution containing NO2- enter the cells by diffusion and interact with OH- or H2O to stably acidify the cytosol. NO2- itself is shown to be transported by the HCO3- transporters present in the plasma membrane. Thus manipulation of the cellular Cl- gradient and 4,4'-diisothiocyanostilbene-2,2'-disulfonic acid (DIDS) were used to show Cl-/NO2- exchange, whereas stimulation of external Na(+)-dependent amiloride-insensitive and DIDS-sensitive pHi increase in acidified cells was used to demonstrate a Na(+)-(NO2-)n cotransport. Hence NO2- can be a convenient substitute for HCO3- when studying HCO3- transport in an open system. The studies also show that cellular levels of nitrogen oxides and NO2- can be modulated by the cellular HCO3(-)-buffering system.(ABSTRACT TRUNCATED AT 250 WORDS)

Kinetics of nitric oxide oxidation

2010 ◽  
Vol 64 (2) ◽  
Author(s):  
Kinga Skalska ◽  
Jacek Miller ◽  
Stanisław Ledakowicz
Keyword(s):  
Nitric Oxide ◽  
Nitrogen Oxides ◽  
Emission Reduction ◽  
Nox Emission ◽  
Solubility In Water ◽  
The Third ◽  
Emission Regulations ◽  
Global Concern ◽  
Removal Technologies ◽  
Kinetics Of

AbstractNitrogen oxides are nowadays a subject of global concern. Several types of nitrogen oxides exist in the environment: N2O, NO, NO2, N2O3, N2O4, N2O5. The abbreviation NOx usually relates to nitric oxide NO, nitrogen dioxide NO2, and nitrous oxide N2O. The first two are harmful pollutants for both environment and human health, whereas the third is one of the greenhouse gases. Implementation of stringent NOx emission regulations requires the development of new NOx removal technologies from exhaust gases. One of many proposals for NOx emission reduction is the application of an oxidizing agent which would transform NOx to higher nitrogen oxides with higher solubility in water. The main objective of the paper was to present the rate constant of nitric oxide oxidation, determined in our studies.

Assessment of Medical Personnel Exposure to Nitrogen Oxides During Inhaled Nitric Oxide Treatment of Neonatal and Pediatric Patients

PEDIATRICS ◽  
1999 ◽  
Vol 104 (5) ◽  
pp. 1095-1100 ◽  
Author(s):  
Margaret L. Phillips ◽  
Thomas A. Hall ◽  
Krishnamurthy Sekar ◽  
Jeanine L. Tomey
Keyword(s):  
Nitric Oxide ◽  
Nitrogen Oxides ◽  
Pediatric Patients ◽  
Medical Personnel ◽  
Inhaled Nitric Oxide

Nitric Oxide Formation in Diesel Engines

1974 ◽  
Vol 188 (1) ◽  
pp. 477-483 ◽  
Author(s):  
H. Çakir
Keyword(s):  
Nitric Oxide ◽  
Nitrogen Oxides ◽  
Analytical Solutions ◽  
Diesel Engines ◽  
Operating Conditions ◽  
Experimental Results ◽  
Combustion Model ◽  
Oxide Formation ◽  
Nitric Oxide Formation ◽  
Good Agreement

A combustion model is presented to account for the nitric oxide formation in diesel engines at all operating conditions. The paper tries to introduce the concept of variable air-fuel ratio estimated to exist during diesel combustion. Analytical solutions are found to be in good agreement with experimental results. Further investigations will be directed to diesel engines having combustion systems other than the M.A.N.-FM system, and to possible remedies to reduce the formation of nitrogen oxides.

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