نتایج جستجو برای: nitrogen dioxide (no2)

تعداد نتایج: 209424  

2012
D. B. Short

Nitrogen Dioxide: Nitrogen dioxide (NO2) is one of a group of highly reactive gasses known as "oxides of nitrogen," or "nitrogen oxides (NOx)." Other nitrogen oxides include nitrous acid and nitric acid. While EPA’s National Ambient Air Quality Standard covers this entire group of NOx, NO2 is the component of greatest interest and the indicator for the larger group of nitrogen oxides. NO2 forms...

2014
Andaç Akdemir

BACKGROUND Measurements of nitrogen and sulfur dioxide using passive sampler over 12 months in Samsun, Turkey, are compared with SO2 and NO2 concentrations obtained from a co-located chemiluminescence analyzer. The concentrations of Sulfur and nitrogen dioxide in the ambient air during the period from November 2009 to September 2010 are analyzed. RESULTS The highest value for annual NO2 and S...

Journal: :iranian journal of biotechnology 2013
misa takahashi makiko nakagawa hiromichi morikawa

the recently published articles in the iranian journal ofbiotechnology inspired us to write this short communication on nitrogen dioxide no2-philic plants (1).to cope with environmental pollution, we thought(still think) that development of methods that mitigatepollution is an urgent issue, and that no2-philic plantsthat can grow with no2 as the sole nitrogen source areinstrumental for the impl...

Journal: :health scope 0
elahe zallaghi department of environmental pollution, lecture at applied science training center, ahvaz municipality university, ahvaz, ir iran sahar geravandi department of nursing, islamic azad university, tehran medical sciences branch, tehran, ir iran; clinical research development center, razi teaching hospital, ahvaz jundishapur university of medical sciences, ahvaz, ir iran mehdi nourzadeh haddad department of agricultural, payame noor university, tehran, ir iran gholamreza goudarzi department of environmental health engineering, school of public health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; environmental technologies research center, ahvaz jundishapur university of medical sciences, ahvaz, ir iran leila valipour department of environmental pollution, islamic azad university, ahvaz, ir iran shokrolah salmanzadeh infectious and tropical diseases research center, health research instituted, ahvaz jundishapur university of medical sciences, ahvaz, ir iran

materials and methods in the first stage, no2 pollutant concentrations were measured using the data collected from air pollution monitoring stations. sampling was performed in six stations. the chosen stations have been based on the us environmental protection agency (epa) standards. in the next step, the data were processed using excel software and information was given to the airq model. data...

Background: nitrogen oxides occur in the atmosphere in Six forms of namely: N2O , NO , NO2 , N2O3, N2O4 and N2O5 .Among these oxides NO2 is the most important air pollutant because of its relatively high toxicity and its ubiquity in ambient air. In this research Griess-Saltzman method was utilized for determination of nitric oxide and nitrogen dioxide in the atmosphere of different laboratori...

Journal: :Environmental Health Perspectives 1994
R V Cooney P J Harwood L J Custer A A Franke

Plants are more susceptible to the toxic effects of nitrogen dioxide when exposure takes place in the dark. Beta-carotene and other common carotenoids react with nitrogen dioxide in the dark to yield intermediate nitrosating agents consistent with the formation of nitrate esters. Simultaneous exposure of carotenoids to NO2 and light significantly reduced formation of nitrosating intermediates a...

2004
João Pedro Malhado Miguel Tavares Mário N. Berberan-Santos

The reversible gas phase reaction dinitrogen tetroxide to nitrogen dioxide is very suitable for an integrated physical chemistry project incorporating thermodynamics, statistical mechanics, spectroscopy, and kinetics. Furthermore, nitrogen oxides are molecules of current interest given their important role in atmospheric chemistry. Only relatively common equipment and chemicals are required for...

Journal: :iranian journal of toxicology 0
سارا موسی زاده sara mousazadeh department of pharmacology, pharmacy school, ahwaz, jundishapor university of medical science, ahwaz, iran.

background: nitrogen oxides occur in the atmosphere in six forms of namely: n2o , no , no2 , n2o3, n2o4 and n2o5 .among these oxides no2 is the most important air pollutant because of its relatively high toxicity and its ubiquity in ambient air. in this research griess-saltzman method was utilized for determination of nitric oxide and nitrogen dioxide in the atmosphere of different laboratories...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2004
Xinyu Chen Yoshiro Oro Kenta Tanaka Norimichi Takenaka Hiroshi Bandow

A new stripping coil for the collection of nitrogen dioxide (NO2) has been developed to increase its versatility and efficiency. Nitrogen dioxide measurements based on quantitative collection through a reaction coil into an alkaline solution has been examined. Nitrogen dioxide is collected in a 0.1 N NaOH solution. This collection system has an efficiency of nearly 100%. The absorbed nitrogen d...

Amir Hossein Hamidian, Borhan Mansouri,

Background: Today, air pollution is one of the major problems in large cities including Isfahan. Methods: The objective of this study was to investigate the variations of ozone (O3), carbon monoxide (CO), nitric oxide (NO), nitrogen dioxide (NO2), nitrogen oxides (NOx), sulphur dioxide (SO2), and particulate matter (PM10) concentrations in different months at three stations and also to explore ...

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