Recent advances in the development of bioelectronic nose
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The olfactory system has the ability to discriminate and identify thousands of odorant compounds at very low concentrations. Recently, many researchers have been trying to develop artificial sensing devices that are based on the olfactory system. A bioelectronic nose, which uses olfactory receptors (ORs) as sensing elements, would benefit naturally optimized molecular recognition. Accordingly, ORs can be effectively used as a biological element in bioelectronic noses. Bioelectronic nose can be classified into cell-based and protein-based biosensors. The cell-based biosensor uses living cells that express olfactory receptors as the biological sensing elements and the protein-based biosensor uses the olfactory receptor protein. The binding of odorant molecules to the ORs can be measured using various methods such as piezoelectric, optic, and electric devices. Thus, bioelectronic nose can be developed by combining the biological sensing elements with these non-biological devices. The application of bioelectronic nose in a wide range of different scientific and medical fields is essentially dependent on the development of highly sensitive and selective biosensors. These sensor systems for the rapid detection of specific odorants are crucial for environmental monitoring, anti-bioterrorism, disease diagnostics, and food safety. In this article, we reviewed recent advances in the development of bioelectronic nose.
Keywordsolfactory system olfactory biosensor olfactory receptor bioelectronic nose
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