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Published on: August 6, 2021
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Soybean oleosomes studied by small angle neutron scattering (SANS).
Birgitta I Zielbauer1, Andrew J Jackson2, Sania Maurer1
1Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
Journal of Colloid and Interface Science
|June 13, 2018
Summary
Soybean oleosomes have a 9nm phospholipid-protein shell, maintaining structure up to 90°C. Encapsulation with pectin increased shell thickness, demonstrating its potential for processing applications.
Area of Science:
- Colloid and Surface Science
- Biophysics
- Food Science
Background:
- Oleosomes are natural oil bodies stabilized by a phospholipid-protein layer.
- Understanding the oleosome shell structure is crucial for their application in food processing and encapsulation.
Purpose of the Study:
- To investigate the structure and stabilization mechanism of the oleosome shell under native conditions.
- To determine the direct shell thickness and temperature stability of soybean oleosomes.
Main Methods:
- Small-angle neutron scattering (SANS) with contrast variation was employed to study native and pectin-encapsulated soybean oleosomes.
- A shell model was developed to determine oleosome size and shell thickness.
- SANS measurements were performed at elevated temperatures to assess thermal stability.
Main Results:
- The direct shell thickness of native soybean oleosomes was determined to be 9 nm.
- Oleosomes exhibited high temperature stability, with no structural changes observed up to 90°C.
- Pectin encapsulation resulted in a 10 nm increase in shell thickness, confirming successful coacervation.
Conclusions:
- This study provides direct measurement of oleosome shell thickness and confirms their remarkable thermal stability.
- SANS with contrast variation is a suitable method for characterizing oleosome structure.
- Pectin coacervation effectively modifies oleosome shell properties, indicating potential for controlled delivery applications.
Keywords:
Contrast variationCore-shell modelOil bodiesOleosinOleosomesShell thicknessSizeSmall angle neutron scattering (SANS)StructureTemperatureMore Related Videos
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