Comparison of oil-in-water emulsions prepared by ultrasound, high-pressure homogenization and high-speed homogenization
Year: 2021
Type: article
Abstract: This study was designed to compare the properties of myofibrillar protein (MP) stabilized soybean oil-in-water emulsions fabricated by ultrasound-assisted emulsification (UAE), high-pressure homogenization (HPH) and high-speed homogenization (HSH). The emulsion properties, droplet characteristics, interfacial proteins, protein exposure extent, microrheological properties, multiple light scattering results, and 7 d storage stabilities of the three emulsions were specifically investigated. Our results indicate that UAE and HPH were better emulsification methods than HSH to obtain high-quality emulsions with higher emulsifying activity index (UAE 20.73 m 2 ·g −1 , HPH 11.76 m 2 ·g −1 and HSH 6.80 m 2 ·g −1 ), whiteness (UAE 81.05, HPH 80.67 and HSH 74.09), viscosity coefficient (UAE 0.44 Pa·s n , HPH 0.49 Pa·s n and HSH 0.22 Pa·s n ), macroscopic viscosity index (UAE 2.31 nm −2 ·s, HPH 0.38 nm −2 ·s and HSH 0.34 nm −2 ·s), and storage stability, especially for the UAE. Furthermore, UAE was a more efficient emulsification method than HPH to prepare the fine MP-soybean oil emulsion. The protein-coated oil droplets were observed in the three emulsions. The emulsion droplet size of the UAE-fabricated emulsion was the lowest (0.15 μm) while the interfacial protein concentration (93.37%) and the protein exposure extent were the highest among the three emulsions. During the 7 d storage, no separation was observed for the UAE-fabricated emulsion, while the emulsions fabricated by HPH and HSH were separated after storage for 5 d and 2 h. Therefore, this work suggests that UAE could be a better method than HPH and HSH to fabricate MP-soybean oil emulsion.
Source: Ultrasonics Sonochemistry
Institution: Nanjing Agricultural University
Language: English
Topic: Proteins in Food Systems
Subfield: Food Science
Domain: Life Sciences
Open Access status: gold
Estimated APC paid: $2,300
OpenAlex ID: W4200413144