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 17 of 17 for “"Volatile organic compounds (VOC)"”.
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Sampling for volatile organic compounds from an aquitard: A field evaluation of screen length, purging method, and sampling time
… wells sited in an aquitard contaminated with volatile organic compounds (VOC); Two well-purging methods--(1) pump to the bottom of the screened interval and (2) pump to the top of the screened interval--were evaluated on three monitoring wells with different screened intervals (0.75-m and …
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Fluorinated Graphene Oxide Based Chemiresistive Gas Sensor Targeting NH3 and Other Analytes Under Atmospheric Conditions
… for the detection of chemical analytes such as volatile organic compounds (VOC). The detection methods rely on using functionalization of modified graphene derivatives to target select analytes and produce a quantifiable, distinguishable electrical response. In this work, an in-house …
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Development and characterization of nanocarbon-based devices for sensing applications
… as immunosensors, or humidity/temperature and volatile organic compounds (VOC) sensors are shown and discussed; Finally, in the conclusions the main results, work in progress, developments and future applications are discussed.
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A cost-effectiveness analysis of alternative ozone control strategies : flexible nitrogen oxide (NOx) abatement from power plants in the eastern United States
… of its precursors, nitrogen oxide (NOx) and Volatile Organic Compounds (VOC), as well as on temperature and the available amount of sunlight. The dependence of ozone formation on meteorology makes the timing of emissions important, suggesting the need for a temporally differentiated …
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Mobile Laboratory Measurement of Black Carbon, Particulate Polycyclic Aromatic Hydrocarbons and Other Exhaust Emissions in Mexico City
… monoxide (CO), total nitrogen oxides (NOy) and volatile organic compounds (VOC) are also estimated. The mobile lab has previously been used to chase vehicles and measure their emissions, but analysis has traditionally focused on determining emission factors of individual vehicles associated with …
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Development of ZnO Nanotube Arrays for Chemical Sensing
… challenge in global healthcare. Detection of volatile organic compounds (VOC) in exhaled gas that are cancer biomarkers is emerging as a viable approach for early-stage cancer detection. Gas sensing technologies, particularly those based on low-cost semiconductor metal oxides (SMOX), offer …
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Development of functionalized materials through sol-gel route for applications in catalysis and surface protection
… use of a photocatalyst that allows to degrade volatile organic compounds (VOC). The main photocatalyst is TiO2. It has been studied as a powder or as a film deposited on a support. A comparison of these two shapes has shown that an identical photocatalyst can have different performances …
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Understanding the formation of secondary organic aerosol and the fates of organic nitrates formed from monoterpene oxidation
Secondary organic aerosol (SOA) contributes to a substantial fraction of fine particular matter (PM2.5) that imposes adverse health effects, large uncertainty in radiative forcing, and poor visibility. Monoterpenes represent about 15% of the annual emissions of biogenic volatile organic compounds …
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Combining Chemometrics and non-target GC-IMS gas phase analysis for improved bioprocess monitoring
… feed nutrients, and flavor and fragrance compounds. Process Analytical Technology (PAT) is essential to evaluate batch performance and ensure product quality. It aims to automatically measure as many parameters as necessary, in real time and to gain process insight through chemometric data …
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Microcapsule-based self-protecting coatings
… For steels typical additives include zinc compounds, manganese and other alloying elements. More recently, self-protective coatings have been introduced using microencapsulated anti-corrosion chemicals and compounds that are released on demand at the site of active corrosion. Once triggered …
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Biofiltración de compuestos orgánicos volátiles utilizando diferentes tipos de lecho basados en mezclas de compost de RSU-poda: monitorización mediante diversas técnicas
… ratio, and time) on the stability parameters (organic matter, N-losses, chemical oxygen demand, nitrate, biodegradability coefficient) of the compost was studied. The composting experience was carried out using Municipal Solid Waste (MSW) and Legume Trimming Residues (LTR) in 200 L isolated …
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Differential proteome analysis of human lung epithelial cells following exposure to aromatic volatile organic compounds
The widespread usage of products containing volatile organic compounds (VOC) has lead to a general human exposure to these chemicals in work places or homes being suspected to contribute to the growing incidence of environmental diseases. Since the causal molecular mechanisms for the development of …
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Indoor air pollution and environmental tobacco smoke exposure in a South African birth cohort study
… 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 documented all episodes, which were categorised …
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Polymer/Clay Nanocomposites as Barrier Materials Used for VOC Removal
… polymer in order to decrease the transport of volatile organic compounds (VOC) in indoor air. Building materials are a primary source for VOCs. These emissions are a probable cause of acute health effects and discomfort among occupants and are known to diminish productivity. The predicted …
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New Opportunities in Crowd-Sourced Monitoring and Non-government Data Mining for Developing Urban Air Quality Models in the US
… using community-based sampling (n = 50) for 60 volatile organic compounds (VOC) in the city of Minneapolis, US. I assessed whether adding area source-related features improves LUR model performance and compared model performance using variables featuring area sources from government vs. …
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Improvement of scratch and abrasion resistance properties of automobile paint
Submitted in fulfillment of the requirements for the degree of Master of Engineering, Chemical Engineering, Durban University of Technology, Durban, South Africa, 2022.
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Electrochemical materials and microfabrication for sensor devices
… of various chemicals, including metals, organic molecules, gases and biomolecules. Their design is also highly adaptable: electrode materials, size, surface modifications, and enzyme integration can be tailored to optimise detection for specific applications. This thesis presents the …