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Using the Droplet Transfer Method to Reliably Prepare Giant Unilamellar Vesicles

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Published on: September 19, 2025

BslA-stabilized emulsion droplets with designed microstructure.

Keith M Bromley¹, Cait E MacPhee¹

¹School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK.

Interface Focus

|June 21, 2017

Summary

This summary is machine-generated.

Bacillus subtilis protein BslA stabilizes non-spherical emulsion droplets by forming an elastic film. This allows for control over droplet shape and size, enabling tailored emulsion properties for various applications.

Keywords:

BslA arrested coalescence emulsions interfacial stabilization microstructure

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Area of Science:

Colloid and Surface Science
Materials Science
Biotechnology

Background:

Emulsions, essential in food, pharma, and personal care, typically feature spherical droplets due to interfacial tension.
Controlling emulsion droplet morphology beyond spherical shapes can enhance properties like stability, delivery, and rheology.
Bacterial protein BslA from Bacillus forms an elastic interfacial film, preventing droplet relaxation into spheres.

Purpose of the Study:

To investigate BslA's capability in stabilizing anisotropic emulsion droplets.
To explore BslA's role in controlling emulsion morphology during dynamic emulsification and post-processing.
To demonstrate the design of custom-shaped emulsion droplets using BslA.

Main Methods:

Dynamic emulsification processes were arrested using BslA to observe morphology formation.
Frozen BslA-stabilized emulsion droplets were subjected to partial coalescence.
The structural integrity of partially coalesced droplets was assessed after melting under varying free BslA concentrations.

Main Results:

BslA arrested emulsification, yielding variable droplet morphologies based on conditions.
Partial coalescence of frozen droplets was induced, with structure retention dependent on free BslA.
The fidelity of droplet shape replication during melting was tunable by adjusting free BslA concentration.

Conclusions:

BslA effectively stabilizes anisotropic emulsion droplets, offering control over morphology.
Partial coalescence and melting dynamics reveal BslA film disruption and recovery mechanisms.
BslA enables the design of emulsion droplets with specific shapes and sizes for advanced formulations.