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Updated: Jul 3, 2026

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Published on: August 28, 2017

A study on enzymatic reaction using a liquid emulsion membrane technique.

H Y Ha¹, S A Hong

¹Division of Process Development, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea.

Biotechnology and Bioengineering

|January 20, 1992

Summary

This study optimized enzymatic reactions using liquid emulsion membranes, finding pH and organic solvents critical for stability and enzyme activity. Reusable emulsions retained significant enzyme function.

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Area of Science:

Biochemical Engineering
Separation Science
Enzyme Technology

Background:

Liquid emulsion membrane (LEM) systems offer potential for enzyme immobilization and continuous reactions.
Understanding factors affecting LEM stability and enzyme activity is crucial for process optimization.
Enzyme deactivation and substrate/product transport are key challenges in LEM applications.

Purpose of the Study:

Investigate variables impacting LEM stability, enzyme deactivation, and transport.
Optimize conditions for the hydrolysis of L-phenylalanine methyl ester by alpha-chymotrypsin using LEM.
Determine the influence of internal phase pH and membrane phase composition on enzyme performance and emulsion integrity.

Main Methods:

Utilized a liquid emulsion membrane technique with alpha-chymotrypsin for L-phenylalanine methyl ester hydrolysis.
Qualitatively identified substrate and product transport mechanisms across the membrane.
Systematically varied internal phase pH and membrane phase components (surfactant, carrier, organic solvent).
Assessed emulsion stability and residual enzyme activity under different experimental conditions.

Main Results:

Internal phase pH was identified as a critical factor for enzyme activity within the LEM.
Organic solvent properties significantly influenced the overall emulsion stability.
Optimized conditions allowed for the reuse of the emulsion without requiring further separation.
The immobilized enzyme retained approximately 60% of its native activity despite vigorous mixing.

Conclusions:

LEM technique is viable for enzymatic reactions, with careful control of pH and membrane composition.
Organic solvent selection is key to achieving robust and stable emulsion systems.
The developed LEM system demonstrates potential for reusable biocatalytic processes.
Significant enzyme activity can be maintained in LEMs, paving the way for industrial applications.