Growth efficiency

The P/O quotient obtained in this way is therefore only an approximation. Nevertheless, the values can be used as a comparitive measure of growth efficiency,... 

The growth efficiency (Yfilf ) is proportional to the P/O quotient this is expected from the equation used to calculate P/O (section 3.4, E - 3.16). 

Examine Table 3.1. What is the relationship between specific rate of exopolysaccharide production and growth efficiency ... 

Organism B because it has the lowest Yfif, ie lowest growth efficiency or highest capacity to dissipate energy. 

Is a low or a high growth efficiency for the produdng organism desirable for sophorolipid production Explain your reasoning. 

The specific rate of exopolysaccharide production (qp) is inversely related to growth efficiency (Yq ). 

A typical example of such a polymer is polypyrrole. The exact mechanism by which the electropolymerisation of pyrrole occurs remains a source of controversy however, by assuming 100% growth efficiency, then it can be calculated that 2.25 electrons are removed per monomer unit. Only two electrons are required to polymerise the monomer however, the film is formed in a highly oxidised state, corresponding to one electron per four units, see Figure 2.20. 

Kroer, N. 1993. Bacterial growth efficiency on natural dissolved organic matter. Limnology and Oceanography 38 1282-1290. 

The efficiency with which bacteria use LMW compounds for growth seems much higher (with the exception of formic acid) than current estimates of overall growth efficiency. To address this issue, we can calculate a... 

The maximum value of HON/AON increases in systems with allochthonous carbon inputs. The maximum potential is related directly to the allochthonous organic matter input that is respired in the system (Alloch. Resp.). Additionally, the increased HON will depend on the relative growth efficiency of heterotrophic bacteria on allochthonous material (BGEa och) and the C N ratio of allochthonous material (C Nalloc]l), such that... 

Goldman, J. C., D. A. Caron, and M. R. Dennet. 1987. Regulation of growth efficiency an ammonium regeneration in bacteria by substrate C N ratio. Limnology and Oceanology 32 1239-1252. 

Roland, F. and J. J. Cole. 1999. Regulation of bacterial growth efficiency in a large turbid estuary. Aquatic Microbial Ecology 20 31-38. 

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