Mixed metabolisms on organism and population level

In another study, the use of the calorimetric C02 ratio for measurements of aerobic and anaerobic soil microbial activity was illustrated [87]. Depending on the substrate, the value of the calorimetric 02 ratio and the calorimetriciCOj ratio may be equal (carbohydrates), while an increased value of the caIorimetric C02 ratio compared to the calorimetric 02 ratio is to be expected for more reduced substrates (lipids, ethanol) than carbohydrates. In other words, more oxygen is consumed per carbon in more reduced substrates (see also [87] for a comparison and discussion of different values reported in 

This will be illustrated in the following example. In the study by Samuelsson and collaborators [108], the multichannel microcalorimeter (BAM) was used in the flow-through mode. The aim of the study was to compare the growth of a dentrifier (catabolic endproduct nitrogen gas). Pseudomonas fluorescens, and a dissimilatory ammonium producer (catabolic endproduct ammonium). Pseudomonas putrefaciens, during anaerobic growth in nitrate- or nitrite- 

The great advantage of calorimetry is that any type of metabolism can be monitored, while all specific methods have limitations. Taking heterotrophic growth as an example, aerobic respiration, anaerobic respiration (external 

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