Effect of ultrasound on the properties of rice bran protein and its chlorogenic acid complex
Tong Wang, Xing Chen, Wei‐Ning Wang, Liqi Wang, Lianzhou Jiang, Dianyu Yu +1 more
Ultrasonics Sonochemistry
Abstract
Ultrasound technology was used to treat rice bran protein (RBP), and the structural and functional properties of ultrasonically treated RBP (URBP) and its chlorogenic acid (CA) complex were studied. When ultrasonic power of 200 W was applied for 10 min, the maximum emission peak λ<sub>max</sub> of the URBP-CA complex in the fluorescence spectrum was red-shifted by 3.6 nm compared to that of the untreated complex. The atomic force microscope (AFM) analysis indicated that the surface roughness of the complex was minimized (3.89 nm) at the ultrasonic power of 200 W and treatment time of 10 min. Under these conditions, the surface hydrophobicity (H<sub>0</sub>) was 1730, the contents of the α-helix and β-sheet in the complex were 2.97% and 6.17% lower than those in the untreated sample, respectively, the particle size decreased from 106 nm to 18.2 nm, and the absolute value of the zeta-potential increased by 11.0 mV. Therefore, ultrasonic treatment and the addition of CA changed the structural and functional properties of RBP. Moreover, when ultrasonic power of 200 W was applied for 10 min, the solubility, emulsifying activity index (EAI), and emulsion stability index (ESI) were 68%, 126 m<sup>2</sup>/g, and 37 min, respectively.
Extracted Claims
6 claims extracted from this paper into the knowledge graph
ultrasound decreases particle size of URBP-CA complex
“The particle size decreased from 106 nm to 18.2 nm.”
ultrasound increases absolute value of zeta-potential of URBP-CA complex
“The absolute value of the zeta-potential increased by 11.0 mV.”
ultrasound improves solubility, emulsifying activity index (EAI), and emulsion stability index (ESI) of URBP-CA complex
“Moreover, when ultrasonic power of 200 W was applied for 10 min, the solubility, emulsifying activity index (EAI), and emulsion stability index (ESI) were 68%, 126 m^2/g, and 37 min, respectively.”