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Issue 7, 2018
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Focusing manipulation of microalgae in a microfluidic device using self-produced macromolecules

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Abstract

Extracellular polymeric substances (EPSs) are self-produced biosynthetic macromolecules that have a three-dimensional architecture in bacterial biofilms and are mainly composed of a mixture of polysaccharides, proteins and nucleic acids. Compared with synthetic polymers, EPSs can have a long relaxation time due to their structural complexity. We exploited the non-Newtonian rheological behavior of EPSs extracted from Chlorella vulgaris with the help of cell focusing and particle focusing in confined microchannels. The microalgae showed a ‘self-ordering’ behavior in the ‘self-secreted’ substances. The EPSs were characterized and analyzed chemically and rheologically. In a microfluidic device, they enable outstanding particle focusing over a wide range of flow rates. This study can open an effective, unique pathway for applications of biomass related resources such as EPSs.

Graphical abstract: Focusing manipulation of microalgae in a microfluidic device using self-produced macromolecules

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Publication details

The article was received on 11 Dec 2017, accepted on 22 Feb 2018 and first published on 26 Feb 2018


Article type: Communication
DOI: 10.1039/C7LC01324H
Citation: Lab Chip, 2018,18, 1017-1025
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    Focusing manipulation of microalgae in a microfluidic device using self-produced macromolecules

    M. J. Kim, J. R. Youn and Y. S. Song, Lab Chip, 2018, 18, 1017
    DOI: 10.1039/C7LC01324H

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