Energy production, oxygen consumption

Table 27-1. Energy yields, oxygen consumption, and carbon dioxide production in the oxidation of metabolic fuels.

By means of the video tracking system it was possible to observe the behavioural response of tilapia O. mossambicus) during severe hypoxia [58]. The authors found no differences to the normoxic state so that the calorimetrically determined 50 % reduction of the heat production rate had to be ascribed to a lowered cellular energy metabolism which is known as metabolic depression. Moreover, strong fluctuations between aerobic and anaerobic periods were observed in the power-time curves. A slow acidification of the water had no influence on heat production, oxygen consumption and oxycaloric equivalent of tilapia under normoxic conditions. And even an additional stepwise hypoxia showed no potentiating effect [136,151]. 

Metabolic rate, basal (BM) Metabolic energy transformation calculated from measurements of heat production or oxygen consumption in an organism in a rested, awake, fasting, and thermoneutral state, in W nr. ... 

An ideal renewable resource will be one that can be replenished over a relatively short timescale or is essentially limitless in supply. The latter will include solar radiation, geothermal energy, oxygen, carbon dioxide and water. Nor should production or consumption of these resources contribute to the net atmospheric burden of carbon dioxide. Advantage can be taken of the fixation of atmospheric carbon dioxide into plant material by the process of photosynthesis. 

A burning rate of common materials and products in fire can only be specifically and accurately established through measurement. Estimates from various sources are listed in Table 9.4. Also, oxygen consumption calorimeters are used to measure the energy release rate of complex fuel packages directly. In most cases, the results are a combination of effects ignition, spread and burning rate. 

Tbpspe supplies a complete range of catalysts that can be used in the methanol plant. Tbtal energy consumption for this process scheme is about 7.0 Gcal/ton including energy for oxygen production. 

The use of direct calorimetry is not a convenient technique, since it requires a specially constructed room and the confinement of human subjects for a day or longer in the room. The doubly labeled water technique offers a convenient alternative, providing that one has a machine to perform isotope ratio mass spectrometry. The doubly labeled water technique is used to measure the rate of total CO2 production in the body. This number alone is not sufficient to allow one to calculate the total energy expenditure. But the value for COj production (moles COi/day), along with the RQ, allows one to calculate the oxygen consumption using the following formula ... 

Energy production and metabolism Respiration rate Oxygen consumption linked to ATP production, mitochondrial membrane potential... 

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