Oxygen mass balance

Body water oxygen isotopic composition in mammals is a function of the oxygen mass balance of the specific animal. In general, it can be related to three major oxygen sources air oxygen, drinking water, and food (both the... 

Only the formulas for KLa by Parkhurst and Pomeroy (1972), Taghizadeh-Nasser (1986) and Jensen (1994) have been developed for sewer pipes. Taghizadeh-Nasser (1986) performed the investigation in a pilot sewer, whereas the formulas developed by Parkhurst and Pomeroy (1972) and Jensen (1994) were based on measurements in real sewers. Parkhurst and Pomeroy (1972) made investigations based on an oxygen mass balance in sewers that were cleaned for sediments and biofilm. Jensen (1994) based his formula on the one developed by Pomeroy and Parkhurst (1972) and measurements of the reaeration by a direct methodology using krypton-85 as radiotracer (cf. Chapter 7). 

There is no need for an oxygen mass balance in the bubble phase because oxygen is assumed available in excess and the bubble is assumed to be free of solids. 

Dissolved oxygen control strategies are associated with the oxygen transfer term in the oxygen mass balance (Equation 1) ... 

Hamme, R. C. and S. R. Emerson (2006) Constraining bubble dynamics and mixing with dissolved gases implications for productivity measurements by oxygen mass balance./. Mar. Res. 64, 73-95. 

For batch aeration in a constant-volume tank, an oxygen mass balance can be written as... 

The problem, hence, is governed by the following system of equations. First is the equation of oxygen mass balance in the channel (6.37). Second is the condition of equipotentiality of cell electrodes. Now, however, voltage loss in membrane is not negligible, and this condition reads... 

Consider the ID expression for voltage loss (3.5). Following the general procedure of transition from the ID to the quasi-2D model, we now treat oxygen concentration in the channel c/ and current density j in this expression as local values, which depend on z. These values obey the following equations, is governed by the oxygen mass balance equation... 

Since the total molar concentration of the anode and cathode flows is constant, it is convenient to introduce the molar fractions V and of methanol and oxygen, respectively. In terms of molar fractions, the equations of methanol and oxygen mass balance in the respective channel read... 

A chemical ionization mass spectrometer (MS), from V F named Air-sense 500, an electron pulse ionization mass spectrometer, fi-om V F named H-sense, and Fourier-transformed infrared spectrometer (FTIR), from MKS named MultiGas 2030 Model, are used simultaneously to analyze the product composition. FI2O is calculated via the oxygen mass balance. 

Note that the equations of the section First Integral are derived not using the current balance equation Equation 4.53. Above, the oxygen mass balance Equation 4.55 and Ohm s law (4.54) do not contain the ORR rate. Thus, the results of this section are valid regardless of the assumptions on the ORR kinetics. 

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