Effect of High Hydrostatic Pressure on Physicochemical and Structural Properties of Rice Starch |
| |
Authors: | Wenhao Li Yunfei Bai Saleh A S Mousaa Qing Zhang Qun Shen |
| |
Affiliation: | 1.College of Food Science and Nutritional Engineering, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education,China Agricultural University,Beijing,China |
| |
Abstract: | Rice starch–water suspension (20%) were subjected to high hydrostatic pressure (HHP) treatment at 120, 240, 360, 480, and
600 MPa for 30 min. Polarizing light microscope, scanning electron microscopy (SEM), rapid visco analyzer (RVA), differential
scanning calorimeter (DSC), and X-ray diffraction were used to investigate the physicochemical and structural changes of starch.
Microscopy studies showed that the treatment of starch with HHP under 600 MPa for 30 min resulted in a complete loss of birefringence
and a gel-like appearance. The treatment of starch suspension with HHP at 600 MPa resulted in a significant increase in swelling
power and solubility at low temperature (50–60 °C), but opposite trends were found at high temperature (70–90 °C). The DSC
analysis showed a decrease in gelatinization temperatures and gelatinization enthalpy with increase of pressure levels. RVA
viscograms of starches exhibited an increase in peak, trough, and final viscosities, peak time, and pasting temperature but
decrease of breakdown, setback viscosities, and pasting temperature when pressure was increased. X-ray diffraction studies
showed that the HHP treatment converted rice starch that displayed the A-type X-ray patterns to the B-type-like pattern. These
results showed that the treatment of rice starch in 20% starch/water suspension at a pressure of 600 MPa for 30 min led to
a complete gelatinization of starch granules. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|