Oxygen efficiency

A wastewater treatment system uses five stacked venturi sections to ensure maximum oxygenation efficiency. 

Incomplete fiber clearance, coupled with immune response, and macrophage death lead to scarring of lung tissue, decrease in blood oxygenation efficiency. 

By employing separate furnaces for smelting and converting, the Mitsubishi process allows better control of oxygen potential, and, hence, of magnetite formation. Oxygen efficiency in the converting furnace is 85 to 90%. 

Cancer cells grow more rapidly than the blood vessels to nourish them thus, as solid tumors grow, they are unable to obtain oxygen efficiently. In other words, they begin to experience hypoxia, a deficiency of oxygen. Under this condition, glycolysis leading to lactic acid fermentation becomes... 

Care must be used in all of these oxidations to avoid fires and explosions. This means operating outside the explosive limits of the system. It also means testing for peroxides before workup. A common method is to see if a sample liberates iodine from a solution of potassium iodide. Chemists at Praxair Inc. have devised a reactor that uses pure or nearly pure oxygen below a gas containment baffle with nitrogen above.207 The oxygen efficiency is about 99%, which allows increased productivity and selectivity at lower-operating pressures or temperatures. The rate of reaction is increased. The amount of vent gas, lost solvent, and lost reactant are reduced. In the oxidation of p xylene, 25-62% less loss to carbon monoxide and dioxide was found together with less color. 

It has been found that oxygen efficiently quenches the fluorescence of many organic molecules [Refs. 60, 68, 81, 92, 486, 534]. The following energetically allowed mechanisms for oxygen quenching of molecules excited to the singlet state can be written as... 

Why is oxygen efficiently transferred from hemoglobin in the blood to myoglobin in the muscles ... 

A feature of the radiolysis experiments which requires some additional clarification concerns the ethylene product. One might object to the omission of any contribution from radical reactions to the ethylene product since radical scavengers affect the yield of this unsaturate. Thus, oxygen sharply reduces the ethylene product while nitric oxide has a less pronounced effect. However, since both scavengers have identical effects on all the rest of the products in the system, we are inclined to interpret the reduction of ethylene in the presence of these additives to quenching of the excited state of the ethyl chloride molecule which eliminates HC1. It has been supposed for some time that oxygen efficiently quenches certain excited states hence, this suggestion does not seem unreasonable. 

C. Nozaki, M. Misono, and N. Mizuno, Oxidation of Cyclohexane with Molecular-Oxygen Efficiently... 

Hemoglobin Transports Oxygen Efficiently by Binding Oxygen Cooperatively... 

HEMOGLOBIN TRANSPORTS OXYGEN EFFICIENTLY BY BINDING OXYGEN COOPERATIVELY... 

Preparation. - By Addition to Alkenes. Triethylborane and phenyl-borinic acid have been found to catalyse hydroalumination of alkenes, and reaction of the intermediate alane with atmospheric oxygen efficiently furnished alcohols resulting from anti-Markovnikov hydration.1 Procedures for the preparation of methylborane and dimethylborane and their use in the synthesis of... 

Scientific Design Company, Inc. Ethylene Oxide Ethylene and oxygen Efficient process yielding highest product quality. Improved catalyst 48 2009... 

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