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Microbial Biosensors

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Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...

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Related Experiment Video

Updated: Jun 8, 2026

Creating Rapid Oxygen Oscillations in Microbial Single-cell Growth Analysis using a Microfluidic Double-layer Device

Creating Rapid Oxygen Oscillations in Microbial Single-cell Growth Analysis using a Microfluidic Double-layer Device

Published on: July 18, 2025

Oxygen sensitive microwells.

Elly Sinkala¹, David T Eddington

¹Department of Bioengineering, University of Illinois at Chicago, USA.

|October 13, 2010

Summary

This summary is machine-generated.

Researchers developed oxygen-sensitive microwells for cell culture. This new tool allows for precise monitoring of oxygen levels near cells, crucial for understanding cell pathways and improving culture conditions.

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Quantitative and Temporal Control of Oxygen Microenvironment at the Single Islet Level

Published on: November 17, 2013

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Last Updated: Jun 8, 2026

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Published on: January 6, 2010

Quantitative and Temporal Control of Oxygen Microenvironment at the Single Islet Level

Quantitative and Temporal Control of Oxygen Microenvironment at the Single Islet Level

Published on: November 17, 2013

Area of Science:

Biomedical Engineering
Cell Biology
Materials Science

Background:

Oxygen tension significantly impacts cellular pathways but is often difficult to control and measure in standard cell cultures.
Existing methods for modulating and assessing oxygen levels can disturb delicate cell culture environments.
Developing novel tools is essential for accurate in situ monitoring of oxygen in cell cultures.

Purpose of the Study:

To create a simple, adaptable method for generating oxygen-sensitive microwells for cell culture.
To enable simultaneous cell isolation and oxygen tension monitoring within microwells.
To provide a platform compatible with high-magnification imaging techniques.

Main Methods:

Fabrication of thin films using polystyrene (PS) and platinum(ii) octaethylporphyrin ketone (PtOEPK).
Embossing techniques to create oxygen-sensitive microwells with adjustable dimensions.
Calibration of oxygen-sensitive microwells and their application to Madin-Darby Canine Kidney Cells (MDCKs).

Main Results:

Demonstrated successful fabrication of oxygen-sensitive microwells adaptable to various experimental needs.
Confirmed the ability of microwells to isolate uniform cell clusters and monitor local oxygen tension.
Observed a significant difference in oxygen levels (35.7%) between high-density (12.6%) and low-density (19.5%) MDCK cell cultures.

Conclusions:

The developed oxygen-sensitive microwell platform offers a novel tool for cell culture research.
This technology facilitates precise, real-time monitoring of oxygen tension at the cellular level.
The platform supports high-magnification imaging and is suitable for studying oxygen-dependent cellular processes.