CELL BASED BIOSENSORS

Advantages: Disadvantages:

EXAMPLE OF A CELL BASED BIOSENSOR


Immobilizing the bacterium Acetobacter xylinium on an oxygen electrode offers the possibility of measuring ethanol in a medium. The measurement takes advantage of the respiratory activity of the bacterium. The immobilized bacterium behind the membrane metabolizes the ethanol with oxygen to acidic acid and water. This leads to an oxygen decrease in the biocatalytic layer which can then be measured by an electrode.

Fig 6: Ethanol assay with a biosensor




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