Application of a quartz crystal microbalance to evaluate biodegradability of starch by Bacillus subtilis |
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Authors: | M Jenkins M Horsfall D Mathew M Scanlon R Jayasekara GT Lonergan |
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Institution: | Department of Chemical Engineering, Monash University, Clayton, Melbourne, Australia. Malcolm.Jenkins@eng.monash.edu.au |
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Abstract: | Biodegradation of solution-cast starch films by Bacillus subtilis was monitored using a quartz crystal microbalance (QCM). A starch film was formed on the crystal by solution casting and exposed to the Bacillus subtilis culture in a bioreactor. The high sensitivity of the QCM could monitor small weight changes of the starch films on the crystal in the initial stages of biodegradation by secreted exo-enzymes of the bacterium. The feasibility of this approach as a means of quantification and characterisation of biodegradability of different polymeric materials by selected organisms is discussed. |
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Keywords: | Bacillus subtilis biodegradation quartz crystal microbalance starch |
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