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Showing 1 to 20 of 244 for “"O3"”.
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Structural, transport and magnetic studies of perovskite Bi1-x Cax Mn O3
This dissertation presents an investigation of the fundamental physics of the perovskite system Bi_{1-x}Ca_xMn0_3. This material belongs to a group of simple perovskites called the manganites which are of technological importance for magnetic device applications as read-head sensors. The …
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Microstructure, Tunable and Pyroelectric Properties of Laser-Ablated Ba (Zr0.25 Ti0.75) O3 Thin Films
… properties of laser-ablated Ba(Zr0.25Ti0.75)O3 thin films deposited on Si-based substrates. The phenomena were investigated under the effects of deposition temperature, post-annealing duration, oxygen pressure, and thickness. It has been found from this research that improved crystallinity of …
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Investigation of the Oxygen Isotope Exchange Between Carbon Dioxide and O3 via O(1D)
… These isotope enrichments are transferred from O3 into CO2, but details of the mechanism are not understood yet. A systematic study was carried out using O2 and CO2 gases of different isotopic composition. Results show the existence of a photochemical isotope equilibrium between O2 and CO2, …
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Fluxes of the NO-O3-NO2 triad above a spruce forest canopy in south-eastern Germany
… of the tropospheric photochemical oxidant ozone (O3). Although they account for less than one millionth of the total constituents of the atmosphere, they play an important role in the composition and chemical processes of the atmospheric boundary layer. They affect the distribution of tropospheric …
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Flash-Sintering of MnCo2O4 and (La, Sr)(Co, Fe)O3 Ceramics for Potential Application in SOFC
… oxide ceramics MnCo2O4 and La0.6Sr0.4Co0.2 Fe0.8O3 (LSCF). These oxides are renowned for their high electrical conductivity and oxygen reduction properties, and therefore find application in solid oxide fuel cell as interconnect coating and cathode respectively. Flash-sintering of LSCF composite …
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Process-Induced Degradation during the Integration of Pb(Zr/x Ti/1-x)O3 Ferroelectric Capacitors
Three types of major process-induced damage which hampers the realization of FRAM (ferroelectric random access memory) device are investigated; dry etching induced damage, hydrogen-induced degradation, and stress effect. Since ferroelectric capacitors utilize the movement of body-centered atoms in …
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Changes in the cation ordering of layered O3 Lix̳Ni₀.₅Mn₀.₅O₂ during electrochemical cycling to high voltages
Selected area electron diffraction patterns were collected from a pristine LiNi₀.₅Mn₀.₅O₂ sample and cycled Lix̳Ni₀.₅Mn₀.₅O₂ samples to 4.5 V and 5.3 V in the charged and discharged states. In the pristine sample, the single-crystal diffraction patterns clearly revealed superlattice reflections …
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Mistura (O2-O3) no tratamento integrado de cadelas com câncer de mama: perfil oxidativo e qualidade de vida
… GC, composed of carboplatin only (n = 11) and GO3 - consisting of the carboplatin-treated dogs associated with ozone therapy (n = 14). All dogs were submitted to clinical, laboratory, mastectomy, clinical-pathological characterization of the tumour, carboplatin chemotherapy (QT), total oxidizing …
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Effect of O3 fumigation on photosynthesis and growth of quinoa and its interaction with drought and elevated CO2
… effects of water stress and elevated levels of O3 and CO2 were investigated on Chenopodium quinoa Willd. The physiological response of quinoa was evaluated by subjecting quinoa to severe drought (10% field capacity), moderate drought (20% field capacity), watered (75% field capacity) and …
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Stomatal sensitivity to photosynthetic and environmental signals in glycine max grown at elevated atmospheric concentrations of CO2 and O3
… of carbon dioxide (CO2) and ozone (O3) will stimulate and impair, respectively, yield and productivity of both managed and natural ecosystems in the 21st century. The ease of diffusion of these gases, as well as water vapor, between the atmosphere and interior of leaves is actively …
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Analysis of the Impact of Air Pollutants, PM2.5 and O3, on Life Expectancy and Quality Adjusted Life-Expectancy in Canada
This thesis analyzes the impact of reducing anthropogenic ozone and fine particulate matter (PM2.5), on mortality rates and incidence of chronic bronchitis (CB) and nonfatal myocardial infarction (AMI). The outcome measures are life expectancy and quality-adjusted life years. The methodologies used …
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Constructing a Miniaturized Chemiluminescence Ozone Monitor for Drone-Based Measurements in Volcanic Plumes: A Way to Resolve the Volcanic Ozone Enigma
… bromine monoxide (BrO), which catalyzes ozone (O3) destruction. Therefore, local O3 depletion is commonly assumed inside volcanic plumes and has also been measured to varying degrees at different volcanoes. However, a calculation comparing atmospheric mixing with the rate of O3 destruction …
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Relating multiscale structure and chemistry with oxygen exchange kinetics in low-thermal-budget Sr(Ti,Fe)O3-d and high-throughput combinatorial thin films
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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The Relationship Between Meteorological Patterns and Rural Ground Ozone Concentration
… areas exceed the level of safe ground ozone (O3) concentration. Non-natural emissions made as result of daily human activities and natural emissions react photochemically to produce ground O3 concentration. Variation in ground O3 concentration is controlled by local and regional emissions, …
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High-throughput phenotyping and genetic mapping of photosynthetic traits and ozone responses in maize and soybean
… future increases in yields. Tropospheric ozone (O3) is a secondary pollutant that is toxic to plants, negatively affects productivity and ultimately reduces crop yield. With current tropospheric O3 concentrations already causing sizeable damage and predicted increases in O3 concentrations leading …
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Direct and Indirect Effects of Elevated Carbon Dioxide and Ozone on the Canopy of a Soybean Agroecosystem
It is unknown how rising atmospheric CO2 and O3 will directly and indirectly alter canopy structure and scale to affect ecosystems. I determined how leaf area index (LAI) was directly affected by elevated [CO 2] and [O3]. By increasing photosynthetic efficiency, elevated [CO2] may increase maximum …
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Current and future consequences of tropospheric ozone on soybean biochemistry, physiology and yield
… max [L.] Merr.), is particularly sensitive to O3 with current estimated losses of 8.5-14% depending on genotype and environmental conditions. Zea mays (maize) is the most important food crop globally in terms of production, and has previously been classified as moderately sensitive to O3. In …
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Ozone Precursor Sources and Box Modeling of Ozone in Mexico City Under Altered Emission Conditions
This dissertation investigated ozone (O3) precursor sources and their impact on O3 formation in Mexico City Metropolitan Area (MCMA) under altered emission condition for March-May, 2016. Since the O3 formation regime in the MCMA has transitioned to VOC-limitation, the identification of key VOCs …
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Physiological and transcriptomic responses of soybean reproductive development to global climate change
… over land. Additionally, tropospheric O3 concentrations ([O3]) have more than doubled since the Industrial Revolution. Tropospheric O3 is a secondary air pollutant formed from the photochemical oxidation of methane, carbon monoxide and volatile organic compounds (VOCs) in the presence …
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