Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"Nitrogen dioxide (NO2)"”.
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Investigation of the Photoenhanced Reduction of Nitrogen Dioxide (NO2) on Organic Films and Above Soils as the Missing Source of Daytime Tropospheric Nitrous Acid (HONO)
… radiation on the uptake kinetics of gas-phase NO2 on various phenolic-containing organic films using a wetted-wall flow tube (WWFT) photoreactor. Experimental methods are discussed in detail. A time-dependent model for non-equilibrium conditions incorporating both the chemistry and diffusion …
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The use of nitrogen dioxide for the oxidation of ammonium nitrate
… of destroying ammonium nitrate by reduction with nitrogen dioxide (NO2). The use of NO2 as a reductant was first described in 1985, however, no further investigation or optimisation of the technique has been published since that time. The results of investigations into six key aspects of this …
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Doping of Metal Organic Framework (UiO) and for N02 adsorption at ambient Conditions
… of various air purification technologies. Nitrogen dioxide NO2 is one of the toxic gases in the atmosphere that is corrosive; it causes severe damage to materials, even at low concentrations. Research on the adsorption of this gas at atmospheric pressure and ambient temperatures is uncommon …
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Coronary Heart Disease Mortality and long-term Exposure to Ambient Particulate Air Pollutants in Elderly Nonsmoking California Residents
… [particulate matter(PMio), Ozone (O3), sulfur dioxide (SO2), nitrogen dioxide (NO2) or particulate matter</p> <p>In the AHSMOG cohort, each increment of 10 |ig/m3 in PMio in two-pollutant models showed increased risks of fatal NMRD with the relative risk (RR) of 1.13 [95% confidence interval …
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Atmospheric Pollutant Levels in Southeast Brazil During COVID-19 Lockdown: Combined Satellite and Ground-based Data Analysis
… and ground-based data analysis. We explored nitrogen dioxide (NO2) and particulate matter (PM2.5) daily levels for the month of May during different years within 2015-2020. Daily measurements of NO2 column concentrations from the Ozone Monitoring Instrument (OMI) aboard NASA's Aura satellite …
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Elucidating the chemistry of particulate and chlorinated nitrates in the troposphere through method development, and chamber and field studies
… the chemistry of chlorinated and particulate nitrogen oxides in the troposphere which can impact the budgets of atmospheric oxidants and aerosol. Mixing ratios of nitryl chloride (ClNO2) were measured by chemical ionization mass spectrometry (CIMS) during the ORCA campaign in July 2015 on the …
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Ambient air pollution and cardiorespiratory outcomes amongst adult residing in four informal settlements in the Western Province of South Africa
… of aerodynamic diameter of 2.5µm (PM2.5) and nitrogen dioxide (NO2). A questionnaire was adapted from the European Community Respiratory Health Survey and National Health and Nutrition Examination Survey questionnaire to collect data on self-reported cardiorespiratory outcomes and specific …
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Effects of Aqueous Organic Coatings on the Interfacial Transport of Atmospheric Species
… (IBBC-EAS) was used to measure the gas-phase nitrogen dioxide (NO2) evolved via photolysis of aqueous nitrate solutions either uncoated or containing octanol, octanoic acid and stearic acid monolayers. Both octanol and stearic acid reduced the rate of gaseous NO2 evolution, and octanol also …
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Employment of Multi-Source Satellite-Based Observations in Air Quality Modeling over Asia
… the inventoried estimates of East Asia’s nitrogen oxides (NOx) and primary particulate matter (PM) emissions to improve model accuracy in simulating aerosol optical depth (AOD), using nitrogen dioxide (NO2) columns and AOD data from the TROPOspheric Monitoring Instrument (TROPOMI), …
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Nitrogen oxide delivery systems for biological media
… These processes are likely mediated by reactive nitrogen species (RNS) such as nitrogen dioxide (NO2) and peroxynitrite formed from the respective reactions of NO with oxygen and superoxide anion. Controlled delivery of these RNS at levels expected to occur in vivo is desirable in studying these …
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Data assimilation and numerical modelling of atmospheric composition
… the photochemical pollutants ozone (O3) and nitrogen dioxide (NO2), the other targeting sulphur dioxide (SO2). In both cases, assimilation of surface-based air quality monitoring data is found to initially improve the forecast when assessed on monitoring stations not used in assimilation. …
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Unraveling atmospheric physics and chemistry of long-range transport of pollutants: Development of novel tools and methods
… of pollutants (e.g., ozone, O3; and nitrogen dioxide, NO2) and alarming high peaks of unhealthy criteria pollutants (e.g., particulate matter, PM; and carbon monoxide, CO) in downwind regions. As the chemical composition of outflow over a region or continent can significantly affect …
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Blood pressure variation and its association with outdoor temperature among adults with hypertension in a primary care setting in South Africa
… blood pressure were found to be associated with nitrogen dioxide (NO2) and sulphur dioxide and (SO2) and therefore may be confounded by them. In a multivariate analysis controlling for air pollution, humidity and several leading cardiovascular risk factors, it was observed that a 10°C increase in …
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Air Pollution and Migraine: Refining Estimates through Innovative Analysis, Exposure and Outcome Measurement
… models, I estimated the association of ambient nitrogen dioxide (NO2), ozone (O3), and particulate matter 2.5 µm or smaller in diameter (PM2.5) with migraine attacks recorded using an established smartphone app, Migraine Buddy. Results: (1) My systematic review showed that for associations …
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Physics-guided inference from gas emission data for source characterization and air pollution mapping
… is based on long-term mobile measurements of Nitrogen Dioxide (NO2) concentrations in Oakland, California. We find strong correlations between wind speed and NO2 concentrations in the absence of other causes of strong vertical mixing such as highway traffic and higher surface heatfluxes in …
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IMPACT OF INDOOR AIR POLLUTION ON INFLAMMATORY BIOMARKERS AND CARDIAC AUTONOMIC CONTROL IN HEALTHY SUBJECTS AND PATIENTS WITH CONGESTIVE HEART FAILURE (APICE STUDY)
… levels of fine particulate matter (PM2.5), nitrogen dioxide (NO2) and volatile organic compounds (VOCs) were monitored using a portable detector for 7 days. Together, a 7-day monitoring was performed through a wireless patch that continuously recorded electrocardiogram, respiratory activity …
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Development and testing of a methodology for attributing sources of airborne pollutants to their receptors
… suspended particulate (TSP), nitric oxide (NO), nitrogen dioxide (NO2) and nitrogen oxides (NOx) as well as wind speed, wind direction, ambient temperature and total rainfall were measured continuously for one year. The chemical components of PM10 and TSP, calcium (Ca2+), magnesium (Mg2+), copper …
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Electrical detection of atmospheric pollutants and detergents on silicon
… between gaseous oxidative species, specifically nitrogen dioxide (NO2), and silicon surfaces on ambipolar silicon junctionless nanowire transistors (Si-JNTs) (Chapter 2). Experimental work and density functional theory (DFT) modelling demonstrate that NO2 functions as a "pseudo" molecular dopant, …
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Ground- and satellite-based observations of column nitrogen dioxide: instrument performance, column-to-surface relationships, and the role of meteorology in coastal urban environments
Nitrogen dioxide (NO2) is a criteria air pollutant that is deleterious to human health and the environment, but characterizing its distribution is challenging. This challenge arises from its abundant and heterogeneous sources, short lifetime, and the limited spatial extent of surface monitoring …
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Indoor air pollution and environmental tobacco smoke exposure in a South African birth cohort study
… particulate matter (PM10), carbon monoxide (CO), nitrogen dioxide (NO2), sulphur dioxide (SO2) and volatile organic compounds (VOC). Maternal and infant urine cotinine measures were used to validate self-reported tobacco smoking and exposure. Study staff trained in recognition of LRTI or wheeze …
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