Oxygen uptake measurement procedure

To estimate the design parameters for oxygen uptake in a fermenter, you can use the correlations presented in the previous sections, which can be applicable to a wide range of gas-liquid systems in addition to the air-water system. However, the calculation procedure is lengthy and the predicted value from those correlations can vary widely. Sometimes, you may be unable to find suitable correlations which will be applicable to your type and size of ferment ers. In such cases, you can measure the oxygen-transfer rate yourself or use correlations based on those experiments. 

The respiratory activity of the brain tissue was determined by measuring the rate of oxygen uptake with a Clark oxygen electrode (7). The sample of tissue (a brain half) was treated exactly as if used in a calcium efflux experiment except no radioactivity or RF power was used. Following this procedure which required about 55 minutes, the tissue was placed in the oxygen electrode cell containing 1.6 ml of the standard medium (pH 7.8) at 37°C and the rate of oxygen uptake was recorded. 

PROCEDURE MEASUREMENT OF OXYGEN TRANSFER COEFFICIENT AND OXYGEN UPTAKE RATE... 

The resistance dependence and thermogravimetric analysis (TGA) of Er-Ba Cu O has been measured in the temperature range 2/ C to 920 C. The heat treatments and oxygen flow rates simulated actual sintering and annealing processes used in sample preparation. Evidence of a phase transition in Er Ba Cu O near 680 C is discussed, as well as the implications of the maximum oxygen uptake near 400 C. The impact of sample preparation procedures on sample features is also discussed. 

The kinetics of oxidation of toluene was studied at atmospheric pressure by measuring oxygen uptake using a glass manometric apparatus. The detailed procedure and experimental setup are described elsewhere [4,8]. 

The continuous measurement of oxygen uptake with ventilated or spontaneously breathing patients has proved to be a special and not routine monitoring procedure. Future applications may involve additional special procedure such as lung water determinations or non-invasive monitoring of cardiac output changes. 

The oxygen uptake test measures the drop in pressure in a closed system. This test gives errors if gaseous oxidation products are formed. Oxidative induction time is determined according to ASTM procedure D 3895-80 and adapted methods [20]. This test can also be used to assess the antioxidant efficiency. 

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