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Bacteria counting with impedance spectroscopy in a micro probe station
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- Jönsson, M. (author)
- Uppsala universitet,Elektronik,Nanoteknologi och funktionella material,Uppsala University, Sweden
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- Welch, Ken (author)
- Uppsala universitet,Nanoteknologi och funktionella material,Uppsala University, Sweden
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- Hamp, Sven (author)
- Mälardalens högskola
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- Strömme, Maria (author)
- Uppsala universitet,Nanoteknologi och funktionella material,Uppsala University, Sweden
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(creator_code:org_t)
- 2006-04-22
- 2006
- English.
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In: Journal of Physical Chemistry B. - : American Chemical Society (ACS). - 1520-6106 .- 1520-5207. ; 110:20, s. 10165-10169
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- A method to quantify the density of viable biological cells in suspensions is presented. The method is implemented by low-frequency impedance spectroscopy and based on the finding that immobilized ions are released to move freely in the surrounding suspension when viable Escherichia coli cells are killed by a heat shock. The presented results show that an amount of ions corresponding to ∼2 × 108 unit charges are released per viable bacterium killed. A micro probe station with coplanar Ti electrodes was electrically characterized and used as a measuring unit for the impedance spectroscopy recordings. This unit is compatible with common microfabrication techniques and should enable the presented method to be employed using a flow-cell device for viable bacteria counting in miniaturized on-line monitoring systems.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
Keyword
- Acoustic impedance
- Cell immobilization
- Electrodes
- Ions
- Spectroscopic analysis
- Titanium
- Bacteria counting
- Coplanar Ti electrodes
- Heat shock
- Low-frequency impedance spectroscopy
- Micro probe station
- Bacteria
- Functional materials
- Engineering Science with specialization in Nanotechnology and Functional Materials
Publication and Content Type
- ref (subject category)
- art (subject category)
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