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Utilizing Peanut Oleosome to Stabilize Emulsifier-Free Casein-Maltodextrin-Peanut Oil Emulsion: A Comparative Study
Zhihao Zhao1,2, Guangzhen Zeng1, Zhiming Wang1
1Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China.
ACS Omega
|June 23, 2025
Summary
Peanut oleosomes can replace traditional food emulsifiers, creating stable, emulsifier-free emulsions. This natural alternative enhances physical stability and withstands processing like steam sterilization.
Area of Science:
- Food Science
- Colloid and Surface Chemistry
Background:
- Growing concerns about synthetic food emulsifier health risks necessitate natural alternatives.
- Oleosomes, natural lipid bodies, offer potential as emulsifier-free stabilizers in food products.
- Limited research exists on oleosome functionality in complex food systems under processing.
Purpose of the Study:
- To investigate the physical stability of emulsions using peanut oleosomes as a replacement for peanut oil and emulsifiers.
- To evaluate the impact of high-pressure homogenization on oleosome-stabilized emulsions.
- To assess processing conditions for optimal oleosome-based emulsion preparation.
Main Methods:
- Comparison of four emulsion types: control (CE, CEH) and peanut oleosome-stabilized (PE, PEH).
- Application of high-pressure homogenization to assess emulsion stability.
- Measurement of physical stability indicators: emulsifying activity index, emulsion stability index, interfacial protein content, Turbiscan stability index, and creaming index.
- Evaluation of a simplified homogenization method.
Main Results:
- Peanut oleosome-stabilized emulsions (PEH) demonstrated superior physical stability compared to control emulsions (CEH) after high-pressure homogenization.
- PEH samples successfully withstood steam sterilization (121 °C, 20 min).
- Key stability metrics significantly improved in PEH: higher emulsifying activity and emulsion stability indices, increased interfacial protein content, and reduced Turbiscan and creaming indices.
Conclusions:
- Peanut oleosomes are feasible for creating emulsifier-free emulsion products.
- The study highlights the critical role of processing conditions, such as homogenization, in achieving satisfactory emulsion stability.
- Utilizing peanut oleosomes presents a promising strategy to reduce reliance on synthetic food emulsifiers and mitigate associated health risks.
