Paper Type |
Contributed Paper |
Title |
Semi-dry Impregnation Method of Rice Starch with Xanthan Gum Prior to Modification by Dry Heat Treatment |
Author |
Jian Su, Bhakkhawat Laoka, Pathama Chatakanonda, Wirat Vanichsriratana, Klanarong Sriroth, Sirithorn Lertphanich, Sunee Chotineeranat and Kuakoon Piyachomkwan |
Email |
sunee@biotec.or.th |
Abstract: Dry heated xanthan gum-rice starch samples were prepared by dry heat treatment (130°C) of high, medium and low amylose rice starches (HA, MA and LA, respectively) with xanthan gum (X)
using semi-dry impregnation method (SD) (modified samples: HAX-SD-130, MAX-SD-130, LAXSD-
130). Interactions between starch molecules and xanthan gum induced by dry heat treatments
were revealed as xanthan gum was anchored to swollen granules and not dispersed upon cooking. No
breakdown viscosity was observed for HAX-SD-130 and MAX-SD-130 during pasting. Paste clarity of
modified samples was not detected due to restricted swelling of starch granules. Storage modulus (G´)
of modified samples at 95°C and 25°C was increased. Gelatinization and retrogradation temperatures
of modified samples slightly changed while gelatinization enthalpy (ΔH) of modified samples generally
decreased. Dry heat treatment with xanthan gum generally tended to inhibit the retrogradation of
rice starches. Modified samples prepared by semi-dry impregnation method showed improved paste
stability under prolonged cooking time (95°C, 10 min) or acidic condition (pH = 3). |
|
Start & End Page |
429 - 443 |
Received Date |
2020-05-05 |
Revised Date |
|
Accepted Date |
2020-10-26 |
Full Text |
Download |
Keyword |
rice starch, xanthan gum, dry heat treatment, properties, impregnation method |
Volume |
Vol.48 No.2 (March 2021) |
DOI |
|
Citation |
Su J., Laoka B., Chatakanonda P., Vanichsriratana W., Sriroth K., Lertphanich S., et al., Semi-dry Impregnation Method of Rice Starch with Xanthan Gum Prior to Modification by Dry Heat Treatment, Chiang Mai J. Sci., 2021; 48(2): 429-443. |
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