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Showing 1 to 20 of 43 for “"oxygen production"”.
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Analysis of lunar oxygen production methods under varying lunar conditions
… methods of providing the needed amounts of oxygen on the lunar surface for a future human mission. Past studies are combined to provide a comprehensive look at each process and their processing requirements (for example, the mass a processing plant requires, the speed at which the oxygen …
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Singlet Oxygen Production and Its Kinetics in Nanoparticle-Photosensitizer Hybrid Systems
Oxygen is inarguably among the most important molecules which sustain the majority of life as we know it. However, in its lowest excited state, singlet oxygen is a powerful cytotoxic agent capable of damaging DNA, proteins, and cell membranes. In medicinal context, production of singlet oxygen from …
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Effects of Localized Oxygen Production by Electrolysis on the First-Generation Glucose Sensor Response
… the glucose oxidase (GOx) enzyme using molecular oxygen as the electron acceptor and therefore oxygen dependent. Unfortunately for in-vivo work, oxygen in the body is variable and limited. Alternative approaches to overcome the oxygen dependency came with their own limitations. The widely used and …
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OXYHYH20-Integrated Renewable Hydrogen and Oxygen Production for Reduced Emissions in Wastewater Treatment Plant Operations
… using renewable energy to produce hydrogen and oxygen gas by electrolysis. Hydrogen could be produced to power transport fleets, reducing plant emissions, while the oxygen could be used to replace the large volumes of pumped air required for aerobic biological treatment. Renewable hydrogen …
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Biological oxygen production from oxygen-to-argon ratios and oxygen isotopologues in the Atlantic Ocean
… and O2 isotopologues to measure net community production (N) and gross oxygen production (G) in two different areas relevant for the marine C cycle: the South Atlantic subtropical gyre and the North Atlantic during a spring bloom. The former despite small rates of production it is relevant for …
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Analysis of the thermal hydraulics of a multiphase oxygen production reactor in the Cu-Cl cycle
… water splitting process by Cu-Cl cycle, oxygen gas is produced by an endothermic thermolysis process in a three-phase reactor. In this thesis, the required heat for the thermolysis process is provided by adopting the idea of heating some of the stoichiometric oxygen gas by using a nuclear …
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Adaptive Oxygen Production of the Mars Oxygen ISRU Experiment (MOXIE) though Feedback Control of Pressure Sensor 4
The Mars Oxygen ISRU Experiment (MOXIE) has demonstrated the ability of a system to produce Oxygen on the surface of Mars by means of Solid Oxide Electrolysis from atmospheric Carbon Dioxide. This work builds on the mission goals of MOXIE, which runs only intermittently and with much manual …
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System modeling, design, and control of the Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE) and implications for atmospheric ISRU processing plants
… Martian atmosphere can be utilized to produce oxygen for propulsion and life support systems. The Mars Oxygen ISRU Experiment (MOXIE) is a payload being developed by NASA for the Mars 2020 mission. MOXIE will demonstrate oxygen production at a rate of at least 6 grams per hour from the Martian …
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Laboratory Characterization of Mars In-Situ Resource Utilization (ISRU) using the Mars Oxygen ISRU Experiment (MOXIE) FlatSat Testbed
The Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE) is a payload onboard NASA’s Perseverance Rover demonstrating the production of oxygen through solid oxide electrolysis of carbon dioxide in the Martian atmosphere. MOXIE has successfully generated oxygen on Mars 14 times since landing …
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Triple oxygen isotopes and oxygen/argon ratio measurements to enhance coastal and open ocean production/respiration comparisons
The accurate measurement of marine plankton production is required to constrain the global carbon balance. Traditional methods rely on bottle incubations, which are thought to underestimate plankton production. This study presents in situ measurements of gross oxygen production (G) derived from …
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Theoretical copper sulfate dosing;the effect of alkalinity and humic acid on ionic copper toxicity to algae
… term (4-hour) procedure involving measurement of oxygen production by algae exposed to copper was also used to determine the effect of humic acid on ionic copper toxicity to algae. The data showed that short-term tests were best used to predict trends shown in the long-term tests. Both Selenastrum …
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The Luminometer: A Sensitive Instrument for Measuring Low Amounts of Oxygen, and Some Applications to Problems Involving the Measurement of Photosynthesis
… for the continuous measurement of low rates of oxygen production is described, which is useful for the study of photosynthetic systems. An inert carrier gas flows at a controlled rate through a cuvette, then over a solution of luminol and potassium t-butoxide in dimethylsulfoxide (DMSO). The …
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Sodium chlorate oxygen generation for fuel cell power systems
… investigated the use of sodium chlorate as an oxygen storage medium for use in underwater fuel cell power systems. Research into improving hydrogen storage systems is the primary concern when designing fuel cell systems with access to atmospheric oxygen. However, in an underwater environment, …
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The Development and Evaluation of a Range of Phototherapeutic Dyes Towards Infection Control
… These dyes were tested to determine the singlet oxygen yield and how the change in the structure affected the singlet oxygen production. The growth inhibition of these compounds were also tested to see how the changing the derivative affected the growth inhibition of each family of compounds. The …
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Comparative studies on Macrocystis pyrifera and Ecklonia maxima (Laminariales) in South Africa; investigating the use of M. pyrifera as abalone feed in South African aquaculture and assessing the vulnerability of these two species to Marine Heat Waves
… on the samples was measured via photosynthetic oxygen production. Evidence of thallus deterioration in the samples was also recorded. The findings demonstrated that the thermal tolerance ranges and optima varied among the two species, with M. pyrifera displaying a greater sensitivity to the …
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Thermal management of the copper-chlorine cycle for hydrogen production: analytical and experimental investigation of heat recovery from molten salt
… cycle is a promising method of hydrogen production. In this research, thermal management of the copper-chlorine cycle for hydrogen production is investigated by performing analytical and experimental analyses of selected heat recovery options. First, the heat requirement of the …
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Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa
Procedures for measuring phytoplankton production in the southern Benguela upwelling region were investigated. A 125 ml incubation bottle is recommended for routine primary production measurements. Exposure of production samples to high light intensities during manipulations on deck was found to …
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Development of an ambient temperature alkaline electrolyser for integrating with the electrical grid and renewable energy system
Electrolytic hydrogen production from an alkaline electrolyser is considered a promising energy storage technology that integrates renewable energy sources such as wind, solar, wave and tidal energy with the electrical grid. Hydrogen energy systems consisting of conventional temperature (at 80°C) …
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Nikelio ir jo lydinių katalizatorių charakterizavimas ir pritaikymas vandens skaldymo reakcijoje /
… targeting enhancements in hydrogen and oxygen production efficiencies. This study aligns with the 2020 European Union Hydrogen Strategy, which aims at promoting clean hydrogen technologies to bolster sustainable economic growth, diminish carbon emissions, and enhance energy security. …
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