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

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Chemical oscillators in structured media.

Irving R Epstein¹, Vladimir K Vanag, Anna C Balazs

¹Department of Chemistry, Brandeis University, MS 015, Waltham, Massachusetts 02454-9110, USA. epstein@brandeis.edu

Accounts of Chemical Research

|December 30, 2011

Summary

This summary is machine-generated.

Oscillating chemical reactions, like the Belousov-Zhabotinsky system in microemulsions and gels, mimic life-like behaviors such as communication and memory. These systems offer potential models for early life and novel materials with emergent properties.

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Area of Science:

Chemical Oscillations
Systems Chemistry
Origin of Life Studies

Background:

Periodic processes are fundamental to life, including the cell cycle.
Oscillating chemical reactions may model biological behaviors and evolution.
The Belousov-Zhabotinsky (BZ) reaction is a prototype for studying chemical oscillations.

Purpose of the Study:

To examine the Belousov-Zhabotinsky (BZ) reaction in compartmentalized environments like microemulsions and hydrogels.
To explore how these environments influence BZ reaction behavior and mimic life-like traits.
To assess the potential of these systems as models for early life and functional materials.

Main Methods:

Studied the BZ reaction in microemulsions (aqueous droplets in oil) and hydrogels.
Observed phenomena such as communication (quorum sensing analog), memory (photosensitive BZ), and collective behavior.
Investigated shape/volume changes in BZ-infused gels, leading to phototactic movement and self-assembly.

Main Results:

BZ nanodroplets in microemulsions exhibit communication and pattern formation over large scales.
Photosensitive BZ systems demonstrate image memory.
BZ-infused gels display oscillations, enabling the creation of responsive 'worms' and self-attracting segments.

Conclusions:

Compartmentalized BZ systems exhibit life-like properties including communication, memory, and motility.
These systems show promise as models for the origin of life and for developing novel responsive materials.
Integrating reaction-diffusion with material properties and studying coupled oscillator evolution are key future directions.