• Catalytic
  • The most common application is to measure the exhaust-gas concentration of oxygen for internal combustion engines in automobiles and other vehicles in order to calculate and, if required, dynamically adjust the air/fuel ratio so that catalytic converters can work optimally, and also determine whether a catalytic converter is performing properly or not. (wikipedia.org)
  • Modern spark-ignited combustion engines use oxygen sensors and catalytic converters in order to reduce exhaust emissions. (wikipedia.org)
  • TOXICITY
  • Of the many roles ascribed to glutathione (GSH) the one most clearly established is its role in the protection of higher eucaryotes against oxygen toxicity through destruction of thiol-reactive oxygen byproducts. (nasa.gov)
  • catalysts
  • The present invention relates to particle composites useful as catalysts, and particularly, oxygen-reducing electrocatalysts in fuel cells. (patentsencyclopedia.com)
  • By doping the Pd element as a cation into the perovskite oxide lattice to form LaFe0.95Pd0.05O3-δ and LaFe0.9Pd0.1O3-δ, unusual oxidation states of 3/4+ for Pd are stabilized, and the catalysts exhibit superior mass activity, durability, and tolerance to methanol compared with the benchmark commercial Pt/C catalyst. (edu.au)
  • carbon
  • Homolysis generates a carbon centered radical that reacts directly with oxygen and is subsequently trapped by a cobalt(II) species to form the same cobalt-peroxide adduct as suggested by Mukaiyama. (wikipedia.org)
  • depletion
  • Excess soil wetness can inhibit oxygen entry into soils, resulting in oxygen depletion and anaerobic soil conditions. (coursehero.com)
  • Carbonaceous biochemical oxygen demand or CBOD is a method defined test measured by the depletion of dissolved oxygen by biological organisms in a body of water in which the contribution from nitrogenous bacteria has been suppressed. (wikipedia.org)
  • If the sample is being prepared as a seeded sample, add enough prepared seed to the sample to achieve acceptable dissolved oxygen depletion. (wikipedia.org)
  • pollutants
  • This dissertation explores a combined adsorption and advanced oxidation technology for trapping and destruction of organic pollutants in waste water. (edu.au)
  • carbonaceous
  • There are two recognized EPA methods for the measurement of CBOD: Standard Methods for the Examination of Water and Wastewater, Method 5210B In-Situ Inc. Method 1004-8-2009 Carbonaceous Biochemical Oxygen Demand (CBOD) Measurement by Optical Probe. (wikipedia.org)
  • manganese
  • Aeration - The process of adding air to a water supply for the purpose of oxidation (of materials such as iron, manganese, etc. (femyers.com)
  • concentration
  • Oxygen sensors are also used in hypoxic air fire prevention systems to continuously monitor the oxygen concentration inside the protected volumes. (wikipedia.org)
  • Information on oxygen concentration is sent to the engine management computer or engine control unit (ECU), which adjusts the amount of fuel injected into the engine to compensate for excess air or excess fuel. (wikipedia.org)
  • The solution will turn back to original yellow color when the concentration of oxygen level drops. (wikipedia.org)
  • addition
  • citation needed] Approaches for oxygen addition below the water table include recirculating aerated water through the treatment zone, addition of pure oxygen or peroxides, and air sparging. (wikipedia.org)
  • deplete
  • These CBOD samples must be at concentrations that will deplete by at least 2 mg/L dissolved oxygen (DO) and have at least 1 mg/L DO left after five days of incubation. (wikipedia.org)
  • systems
  • Bioventing increases oxygen transfer by inducing air flow through the unsaturated zone using a systems of blowers and air injection / extraction wells or using natural variations in barometric pressure to induce air flow. (wikipedia.org)
  • cells
  • The invention relates to platinum-metal oxide composite particles and their use as electrocatalysts in oxygen-reducing cathodes and fuel cells. (patentsencyclopedia.com)
  • The invention particularly relates to methods for preventing the oxidation of the platinum electrocatalyst in the cathodes of fuel cells by use of these platinum-metal oxide composite particles. (patentsencyclopedia.com)
  • increase
  • This rate increase is likely due to oxidation of cobalt(II) to alkylperoxo-cobalt(III) complex, which subsequently participates in a rapid metal exchange with the hydrosilane to generate the active cobalt(III)-hydride. (wikipedia.org)
  • Composting accelerates pollutant biodegradation by mixing the waste to be treated with a bulking agent, forming into piles, and periodically mixed to increase oxygen transfer. (wikipedia.org)
  • water
  • This graph depicts changes in dissolved oxygen & E h of a soil following water-saturation. (coursehero.com)
  • Since the publication of a simple, accurate and direct dissolved oxygen analytical procedure by Winkler, the analysis of dissolved oxygen levels for water has been key to the determination of surface water purity and ecological wellness. (wikipedia.org)
  • citation needed] Common approaches for providing oxygen above the water table include landfarming, composting and bioventing. (wikipedia.org)
  • Practice
  • The UHMS's purpose is to provide scientific information to protect the health of sport, military and commercial divers and to improve the scientific basis of hyperbaric oxygen therapy, promote sound treatment protocols and standards of practice and provide CME accreditation within its field. (wikipedia.org)
  • ANALYSIS
  • Though many researchers have refined the Winkler analysis to dissolved oxygen levels in the low PPB range, the method does not lend itself to automation. (wikipedia.org)
  • fuel
  • The invention additionally relates to methods for producing electrical energy by supplying such a fuel cell with an oxidant, such as oxygen, and a fuel source, such as hydrogen. (patentsencyclopedia.com)
  • Automotive oxygen sensors, colloquially known as O2 ("ō two") sensors, make modern electronic fuel injection and emission control possible. (wikipedia.org)
  • Since oxygen sensors are located in the exhaust stream, they do not directly measure the air or the fuel entering the engine, but when information from oxygen sensors is coupled with information from other sources, it can be used to indirectly determine the air-fuel ratio. (wikipedia.org)
  • The ECU attempts to maintain, on average, a certain air-fuel ratio by interpreting the information gained from the oxygen sensor. (wikipedia.org)