Article Abstract:
The toluene-dependent degradation of o-cresol by nitrate-reducing bacteria was investigated. The results showed that o-cresol is metabolized only when about 0.5 to 1.0 mg/l of toluene has been degraded. About 73% of the carbon from o-cresol is converted to carbon dioxide and 23% was assimilated into biomass. These results indicate that o-cresol is degraded by a cometabolic reaction in which toluene acts as an inducer of o-cresol-degrading enzymes. Based on the results, a mathematical model describing the kinetics of o-cresol degradation is presented.
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Article Abstract:
The utilization of methanol as thecarbon and energy source for the extracellular production of pyrroloquinoline quinone (PQQ) in methanol utilizing bacteria is discussed. A jar fermentor was used to examine the PQQ production of the selected bacteria. It was found that the level of iron and magnesium have significant effects on the amount of PQQ produced, the level of methanol dehydrogenase activity and on the amount of extracellularly produced protein in the cells of the bacteria.
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Article Abstract:
Researchers describe using recombinant bacteria to produce poly-3-hydroxyalkanoates (PHA). PHA are of interest because they could be used as biodegradable plastics. The molecular weight of the PHA can be varied by varying the level of the inducer.
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