X-ray photoelectron spectroscopic analysis of rice kernels and flours: measurement of surface chemical composition

Nawaz, Malik A., Gaiani, Claire, Fukai, Shu and Bhandari, Bhesh (2016) X-ray photoelectron spectroscopic analysis of rice kernels and flours: measurement of surface chemical composition. Food Chemistry, 212 349-357. doi:10.1016/j.foodchem.2016.05.188


Author Nawaz, Malik A.
Gaiani, Claire
Fukai, Shu
Bhandari, Bhesh
Title X-ray photoelectron spectroscopic analysis of rice kernels and flours: measurement of surface chemical composition
Journal name Food Chemistry   Check publisher's open access policy
ISSN 1873-7072
0308-8146
Publication date 2016-12-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.foodchem.2016.05.188
Open Access Status Not Open Access
Volume 212
Start page 349
End page 357
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Collection year 2017
Language eng
Abstract The objectives of this study were to evaluate the ability of X-ray photoelectron spectroscopy (XPS) to differentiate rice macromolecules and to calculate the surface composition of rice kernels and flours. The uncooked kernels and flours surface composition of the two selected rice varieties, Thadokkham-11 (TDK11) and Doongara (DG) demonstrated an over-expression of lipids and proteins and an under-expression of starch compared to the bulk composition. The results of the study showed that XPS was able to differentiate rice polysaccharides (mainly starch), proteins and lipids in uncooked rice kernels and flours. Nevertheless, it was unable to distinguish components in cooked rice samples possibly due to complex interactions between gelatinized starch, denatured proteins and lipids. High resolution imaging methods (Scanning Electron Microscopy and Confocal Laser Scanning Microscopy) were employed to obtain complementary information about the properties and location of starch, proteins and lipids in rice kernels and flours.
Keyword CLSM
Doongara
Surface analysis
TDK11
X-ray photoelectron spectroscopy
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Agriculture and Food Sciences
 
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