Effect of Chinese-Yam-Based Emulsion Gel on Beef Emulsification Characteristics

Area of Science:

• Food Science
• Meat Science
• Material Science

Background:

• Excessive fat intake is a significant public health concern.
• Developing healthier meat products requires innovative fat substitutes.
• Emulsion gels offer potential for improved nutritional profiles and functionality.

Purpose of the Study:

• To evaluate Chinese yam-based emulsion gels as a fat substitute in beef mince.
• To assess the impact of emulsion gels on emulsification properties and microstructure of beef mince.
• To explore the potential for creating meat products with a healthier fat profile.

Main Methods:

• Formulation of emulsion gels using Chinese yam as the primary ingredient.
• Substitution of fat content in beef mince with varying percentages of emulsion gel.
• Analysis of surface hydrophobicity, water retention capacity, and protein solubility.
• Microstructural characterization using techniques to assess gel structure and protein secondary structures (α-helix, β-turn, β-sheet, random coil).

Main Results:

• At 50% fat substitution, surface hydrophobicity (37.34%) approximated beef tallow, and water retention capacity was significantly enhanced (p < 0.05).
• At 75% fat substitution, protein solubility reached 22.85 mg/mL.
• Increased emulsion gel content led to beef mince densification, increased α-helix content (p < 0.05), and a biphasic pattern in β-sheet content.
• Random coil content minimized at 50% fat substitution, indicating maximal beef mince stability.

Conclusions:

• Chinese yam emulsion gels demonstrate superior emulsification characteristics and can effectively substitute fat in beef mince.
• The use of emulsion gels significantly improves water retention and alters the microstructural properties of beef mince.
• This research provides a foundation for developing healthier meat products with optimized fat profiles and enhanced stability.