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This work presents a biosensor based on living cells immobilised on a light‐addressable potentiometric sensor (LAPS). The set‐up is sensitive to the concentrations of nutrients metabolised by bacteria, which results in an extracellular acidification. This is exemplarily demonstrated with glucose as nutrient and Escherichia coli as microorganism. The function of this biosensor is comparable to an enzyme‐based...
The monitoring and control of a biogas digester is important to maximise the energy output and to avoid down times. Within the digester process, the metabolic activity of relevant organisms represents a key parameter. A light‐addressable potentiometric sensor (LAPS) can be used to determine the extracellular acidification of these organisms. With the developed on‐chip differential LAPS set‐up, external...
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