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What is a biosensor?

What is a biosensor? Here are some definitions.

Noun
  1. (biochemistry) Any device that detects, records or transmits physiological data, especially data concerning the presence of chemical compounds (analytes)
  2. (biochemistry) A device that uses biological material (e.g. microorganisms, oligonucleotides, enzymes, antibodies) to detect other biological molecules or chemicals.
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Examples
The biological response of a biosensor is determined by the biocatalytic membrane, which converts the substrate to a molecular product.
When a fluorophore is attached to a DNA strand, the resulting emission that signals the presence of such metallic ions serves as a practical molecular biosensor.
For wound care, the researchers suggest, the biosensor pores would contain molecules, such as antibodies, that bind to microbe-specific proteins.
To test the nanostructure's potential as a biosensor and antimicrobial, the authors conducted studies using the water-based nanotubes.
Today's biosensor market is dominated by glucose biosensors, mass-produced enzyme-electrodes for the rapid self-diagnosis of blood glucose levels by diabetes sufferers.
These results demonstrated that immobilized recombinant bacterial sensing cells could be used reproducibly in a biosensor device.

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