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 10 of 10 for “"RO2"”.
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Messungen der atmosphärischen Radikale OH, HO 2 , RO 2 sowie des Ultraspurengases Schwefelsäure : Weiterentwicklung, Kalibration und Einsatz einer hochempfindlichen massenspektrometrischen Analysemethode
OH-, HO2- und RO2-Radikale spielen beim oxidativen Abbau von Schadstoffen in der Atmosphäre eine fundamentale Rolle. Bei diesen Oxidationsprozessen wird unter anderem auch gasförmige Schwefelsäure gebildet, die zur Partikelbildung einen wichtigen Beitrag leistet. Zur selektiven Messung dieser …
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MEASUREMENTS AND MODEL PREDICTIONS OF HYDROXYL RADICAL, PEROXY RADICALS, AND NITROUS ACID: EVIDENCE OF MISSING SOURCES OR SINKS IN FORESTED AND INDOOR ENVIRONMENTS
… radical (HO2), and organic peroxy radical (RO2). Due to its importance in the atmosphere, there is a substantial body of literature investigating ROX (≡ OH + HO2 + RO2) chemistry in the outdoor environment, but few measurements occurring indoors, where people spend the majority of their …
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Laboratory studies of atmospheric photochemistry in indoor and outdoor environments
… those involving oxidant and peroxy radical (RO2) chemistry. First, this thesis examines the oxidation of dimethyl sulfide (DMS), which represents a large natural source of sulfur to the atmosphere and affects the climate. Using varied chemical conditions across numerous environmental chamber …
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Summertime ozone pollution in China: Observations and Simulations
… with simplified mechanism underestimate the RO2 production from the intermedia oxygenated volatile organic compounds (OVOCs), leading to an underestimation of the effects of VOCs and NOX emissions on ozone production. I tested the uncertainty of the current empirical fitting method of NOX …
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MEASUREMENTS OF ATMOSPHERIC RADICALS IN AMBIENT AND INDOOR ENVIRONMENTS: OUTDOOR-INDOOR RELATIONSHIPS, INDOOR FORMATION MECHANISMS, AND INSTRUMENTAL ANALYSIS
Hydroxyl (OH), hydroperoxy (HO2), and peroxy (RO2) radicals are key to atmospheric oxidation, critically altering the chemistry of the air we breathe. Radical reactions initiate oxidation of volatile organic compounds (VOCs), which in the presence of nitrogen oxides (NOx) can form ozone and …
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Atmospheric Chemistry of Volatile Organic Compounds: Oxidation Products, Mechanisms and Secondary Organic Aerosol Formation
… this effect was attributed to the disruption of RO2 auto-oxidation cycles by NOx and subsequent nitrate formation at the expense of highly oxygenated molecules. During the course of this work, an automated algorithm was developed to extract compound-specific volatility data from FIGAERO …
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Virtuality's Influence on the Process of Performing Information Systems Development: A case of a software organization
… of ISD projects inside the IS Industry. RO2: Identify how organizations can improve ISD when working in a virtual context. This study employed a single case study of a technology company that recently transitioned from a collocated context to a full remote context. Data was collected …
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An audience focused approach to framing climate-change communication in agriculture
… producers have related to climate change; RO2: investigate frames and messages agricultural producers prefer in reference to the scientifically designated phenomena of climate change and impacts; and RO3: identify the agricultural media and information channels agricultural producers use …
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Studies of the oxidation of zinc dialkyldithiophosphates and related compounds
… = n-octyl , R’ = iso-octyl): (RO)2 P(:S)SH < [(RO2) PS2]2 < Zn [(RO)2 PS2]2 < commercial Zn[(R’O)2 PS2]2 Successive twofold dilutions of 0.08 M organothiophosphate antioxidant in squalane reduce the observed oxidation onset teTeratures and increase the heats of reaction these tend towards values …
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Autoignition and combustion chemistry of kerosene type fuels and components
… by low-temperature chain branching: R + O2 ↔ RO2 ↔ QOOH (+O2) ↔ OOQOOH → 2OH + products. The variation and/or similarities in ignition behavior observed amongst fuels is attributed to their different concentrations of fuel components, whose fractions control the global rate of low-temperature …