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 114 for “"Organic compound"”.
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Predictive Modeling of Volatile Organic Compound Measurements
… data. Intelligent applications using volatile organic compound (VOC) data have not been as heavily investigated as the aforementioned signals. This thesis takes a first principle approach to analyzing historic VOC data in order to make predictions about future VOC values. The central question …
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Control of Volatile Organic Compound (VOC) Air Pollutants
A variety of methods exist to remove volatile organic compound (VOC) air pollutants from contaminated gas streams. As regulatory and public opinion pressures increase, companies are searching for more effective methods to control these emissions. This document is intended as a guide to help …
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Modeling volatile organic compound emission from materials used in passenger vehicle interiors
… have indicated that more than 100 volatile organic compounds (VOCs) are present in ambient air within the cabins of new cars, some of which have been found to have adverse health effects. While previous VOC models have been produced, there is still uncertainty in these models with respect to …
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Investigating volatile organic compound composition in Houston, Texas amidst an atmospheric regime shift.
… and, consequently, public health. Volatile organic compounds (VOCs) are a key component of urban air quality, emitted from anthropogenic and biogenic sources. Over decades, researchers have characterized VOC emission sources to better understand their role in forming ozone and secondary …
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Investigating volatile organic compound composition in Houston, Texas amidst an atmospheric regime shift.
… and, consequently, public health. Volatile organic compounds (VOCs) are a key component of urban air quality, emitted from anthropogenic and biogenic sources. Over decades, researchers have characterized VOC emission sources to better understand their role in forming ozone and secondary …
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Volatile Organic Compound Detection And Disease Diagnostics Using Dna-Functionalized Carbon Nanotube Sensor Arrays
… that can detect low concentrations of volatile organic compounds (VOCs) for early-stage disease diagnostics as well as various environmental monitoring applications. The aim of this thesis work was to address these challenges by developing an “electronic nose” (e-nose) platform based on chemical …
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Comparative study of rare- earth based ferrites for flammable and volatile organic compound gas sensors
… is a one of the toxic and harmful volatile organic compounds (VOCs) commonly used as a solvent in various laboratories and industries. Its high level of inhalation and ingestion can cause low, acute and chronic poisoning. Another commonly used highly flammable gas is liquefied petroleum gas …
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Volatile organic compound fluxes and mixing ratios in two contrasting atmospheric environments : London and the Amazon rainforest
Volatile organic compounds (VOCs) from biogenic and anthropogenic sources are important constituents of the atmosphere with effects on air quality and climate. Current uncertainties in measurements and models relate to their roles in tropospheric ozone and secondary organic aerosol formation, yet …
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BIO/ORGANIC COMPOUND DETECTION USING SODIUM SULFATE MINERALS: IMPLICATIONS IN THE SEARCH FOR LIFE ON MARS AND EUROPA
… of these studies is the detection of bio/organic compounds that may be associated with the mineral. These biosignatures would imply biological involvement during mineral formation. The following research presents a series of natural and synthetic investigations to determine if biological …
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BIO/ORGANIC COMPOUND DETECTION USING SODIUM SULFATE MINERALS: IMPLICATIONS IN THE SEARCH FOR LIFE ON MARS AND EUROPA
… of these studies is the detection of bio/organic compounds that may be associated with the mineral. These biosignatures would imply biological involvement during mineral formation. The following research presents a series of natural and synthetic investigations to determine if biological …
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Heavy metal and organic compound bioaccumulation in bronze whaler sharks (Carcharhinus brachyurus) along the coastline of South Africa
… sharks are prone to heavy metal and persistent organic pollution, being especially vulnerable to such exposure over long lifespans, making these species indicators of systemic pollution in marine ecosystems. As tons of shark meat is harvested annually for consumption, the risk of human exposure …
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Response of Stomoxys calcitrans and Musca domestica (Diptera: Muscidae) to Volatile Organic Compound Profiles from Ontario, Canada Dairy Farms
… (IPM) approaches. We have sampled Volatile Organic Compounds (VOCs) at dairy farms in Southern Ontario, to determine important components of volatile profiles at such sites. Further, we have used Gas-Chromatography-Electroantennography (GC-EAG) to identify VOCs presenting …
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Atmospheric volatile organic compound measurements: Distributions and effects on air quality in coastal marine, rural and remote continental environments
… sampling and analysis of atmospheric volatile organic compounds is presented. The system described in this thesis produced high precision measurements for a large suite of nonmethane hydrocarbons, halocarbons, and alkyl nitrates, from part per billion by volume (ppbv) to part per trillion by …
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SPECIATION STUDIES FOR BIOGENIC VOLATILE ORGANIC COMPOUNDS AND SECONDARY ORGANIC AEROSOL GENERATED BY OZONOLYSIS OF VOLATILE ORGANIC COMPOUND MIXTURES
… atmosphere; the latter process forms secondary organic aerosol (SOA). One of the important sources for SOA is the oxidation of volatile organic compounds (VOCs) by OH radicals, NOx, and O3. Aerosol can be visualized as suspended solid or liquid particle which is in equilibrium with surrounding …
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Thermodynamics and kinetics of hydrophobic organic compound sorption in natural sorbents and quantification of black carbon by electron microscopy
The sorption behaviors of hydrophobic organic compounds (HOCs) in sediments were investigated using pyrene. Native pyrene desorbed slowly, taking from weeks to months to equilibrate. The end-point data suggested that, at nanogram-pyrene-per-liter porewater levels, sorption was much stronger than …
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The testing of semiconductor-based adsorption modified photosensitive sensors for their response to a volatile organic compound, oxygen, humidity, and heating
… exposure to different concentrations of gaseous organic molecules in the parts-per-million (ppm) range. It was theorized that the gaseous organic molecules would adsorb to the dyed semiconductor surface and that some energy would be transferred to the adsorbed analyte rather than to the cadmium …
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Evaluation of Stain Blocking Primer Coatings with Low Volatile Organic Compound (VOC) Content and Effects of Drying Conditions on the Properties of Water Reducible Coatings for Polypropylene
… Board (CARB) plans to reduce the volatile organic compound (VOC) limit of specialty primers, sealers, and undercoaters (SPSU), also referred to as stain blocking primers, from 350 g/L to 100 g/L in January of 2012. These coatings are primarily used as stain blocking primers over a variety …
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Part I, A search for organic compounds as colorimetric analytical reagents for inorganic ions ; Part II, Bz.2 oxybenzanthrone as an acid-base indicator
… as follows: (1) Search for new colorimetric organic reagents. (2) Discovery of any organic compound that shows properties of an indicator. (3) Discovery of any organic compound that shows properties of an oxidizing or reducing agent. (4) Discovery of any other information that may be of …
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Iron oxidation coupled with biodegradation of organic contaminants in a simulated ground water system
… The oxidation of iron and biodegradation of organics was studied in a 12 in X 2.5 in soil column by injecting either oxygen microbubbles or hydrogen peroxide into the soil matrix to provide a source of oxygen. The effluent concentrations of organic and inorganic constituents and the head …
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