Synchrotron X-ray Fluorescence Microscopy study of the diffusion of iron, manganese, potassium and zinc in parboiled rice kernels
| Autor: | Laura Pallas, Raju Adhikari, Kathryn Spiers, Tim J Wess, Rachelle Ward, A. John Mawson, David L. Paterson, Peter Torley, Prakash Oli, Benu Adhikari |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Bran Potassium digestive oral and skin physiology Steaming food and beverages chemistry.chemical_element Mineralogy 04 agricultural and veterinary sciences Manganese Zinc 040401 food science 01 natural sciences Hydrothermal circulation Endosperm 0404 agricultural biotechnology chemistry Parboiling 010606 plant biology & botany Food Science Nuclear chemistry |
| Zdroj: | LWT - Food Science and Technology. 71:138-148 |
| ISSN: | 0023-6438 |
| DOI: | 10.1016/j.lwt.2016.03.034 |
| Popis: | Parboiled rice is known to contain higher levels of nutrients than its non-parboiled counterpart. In order to study the diffusion of micronutrients into the starchy endosperm of the parboiled rice kernel, the parboiled paddy samples were prepared by combining different hydrothermal treatments (hydrated only, steamed-only, hydrated then steamed) employing two hydration temperatures (60 °C and 90 °C). The rice kernels were sectioned longitudinally into 90 μm thick sections after hydrothermal treatment, drying and milling. These rice kernels sections were analysed by Synchrotron X-Ray Fluorescence Microscopy (S-XFM) to determine the distribution of iron (Fe), manganese (Mn), potassium (K) and zinc (Zn). The S-XFM results showed that the bran and germ were rich in these minerals whereas the endosperm had a low concentration. Hydrothermal treatment of kernels increased the mineral diffusion into the endosperm from the bran layer and germ. The highest diffusion of Fe, Zn and Mn was observed in the sample treated with high temperature hydration for a longer time followed by steaming. However, K did not appear to diffuse into the endosperm as much as other the minerals. |
| Databáze: | OpenAIRE |
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