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Pacific Ocean sections of dissolved oxygen and apparent oxygen utilization. Data from the World Ocean Atlas 2009 . In freshwater or marine systems apparent oxygen utilization ( AOU ) is the difference between oxygen gas solubility (i.e. the concentration at saturation) and the measured oxygen concentration in water with the same physical and ...
The metabolic equivalent of task (MET) is the objective measure of the ratio of the rate at which a person expends energy, relative to the mass of that person, while performing some specific physical activity compared to a reference, currently set by convention at an absolute 3.5 mL of oxygen per kg per minute, which is the energy expended when sitting quietly by a reference individual, chosen ...
Such measurements, like measurements of oxygen uptake, are forms of indirect calorimetry. It is measured using a respirometer . The respiratory quotient value indicates which macronutrients are being metabolized, as different energy pathways are used for fats, carbohydrates, and proteins. [ 1 ]
In which pO 2 is the chosen maximum partial pressure of oxygen in atmospheres absolute and the FO 2 is the fraction of oxygen in the mixture. For example, if a gas contains 36% oxygen (FO 2 = 0.36) and the limiting maximum pO 2 is chosen at 1.4 atmospheres absolute, the MOD in feet of seawater (fsw) [ Notes 1 ] is 33 fsw/atm x [(1.4 ata / 0.36 ...
Oxygen compatibility is the issue of compatibility of materials for service in high concentrations of oxygen. It is a critical issue in space, aircraft, medical, underwater diving and industrial applications.
Open ocean areas with no oxygen have grown more than 1.7 million square miles in the last 50 years, and coastal waters have seen a tenfold increase in low-oxygen areas in the same time. [34] Measurement of dissolved oxygen in coastal and open ocean waters for the past 50 years has revealed a marked decline in oxygen content.
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Treatment gas with oxygen partial pressure of up to 2.5 atm may be administered by BIBS mask for periods of 20 minutes, with breaks of 5 minutes on chamber gas during recompression and holding periods. Pure oxygen may be used at pressures less than 60 fsw. Use: For treatment of serious decompression sickness resulting from upward excursion. [3]