Physicochemical and rheological properties of modified rice amylose by dynamic high-pressure microfluidization

ABSTRACT

The effect of dynamic high-pressure microfluidization on physicochemical and rheological properties of rice amylose pastes were examined. The amylose dispersions were pressurized at 60, 100, 140, and 180 MPa. The microfluidization treated rice amylose showed elevated solubility, swelling power, and moisture absorbability. The retrogradability was significantly decreased with the pressure increase. Iodine blue value showed a significant increase at 60~140 MPa, while a slight decrease at 180 MPa. The rheological results indicated that native amylose was a non-Newtonian fluid and displayed pseudoplastic fluids characteristics. The amylose moved toward a Newtonian fluid behavior and its rheopexy decreased with the pressure increased.

KEYWORDS:

• Amylose
• Dynamic high-pressure microfluidization
• Rice
• Physicochemical properties
• Rheological properties

Funding

This work was supported financially by Key Project for Science and Technology Innovation of Jiangxi Province (20124ACB00600).

Additional information

Funding

This work was supported financially by Key Project for Science and Technology Innovation of Jiangxi Province (20124ACB00600).