Selenium characterization in the global rice supply chain

dc.contributor.authorWilliams, P.N.
dc.contributor.authorEnzo, L.
dc.contributor.authorSun, G.
dc.contributor.authorScheckel, K.
dc.contributor.authorZhu, Y.-G.
dc.contributor.authorFeng, X.
dc.contributor.authorZhu, J.
dc.contributor.authorCarey, A.-M.
dc.contributor.authorAdomako, E.E.
dc.contributor.authorLawgali, Y.
dc.contributor.authorDeacon, C.
dc.contributor.authorMeharg, A.A.
dc.date.accessioned2013-01-04T12:36:10Z
dc.date.accessioned2017-10-14T12:12:24Z
dc.date.available2013-01-04T12:36:10Z
dc.date.available2017-10-14T12:12:24Z
dc.date.issued2009
dc.description.abstractFor up to 1 billion people worldwide, insufficient dietary intake of selenium (Se) is a serious health constraint. Cereals are the dominant Se source for those on low protein diets, as typified by the global malnourished population. With crop Se content constrained largely by underlying geology, regional soil Se variations are often mirrored by their locally grown staples. Despite this, the Se concentrations of much of the world’s rice, the mainstay of so many, is poorly characterized, for both total Se content and Se speciation. In this study, 1092 samples of market sourced polished rice were obtained. The sampled rice encompassed dominant rice producing and exporting countries. Rice from the U.S. and India were found to be the most enriched, while mean average levels were lowest in Egyptian rice: ∼32-fold less than their North American equivalents. By weighting country averages by contribution to either global production or export, modelled baseline values for both were produced. Based on a daily rice consumption of 300 g day-1, around 75% of the grains from the production and export pools would fail to provide 70% of daily recommended Se intakes. Furthermore, Se localization and speciation characterization using X-ray fluorescence (µ-XRF) and X-ray absorption near edge structure (µ-XANES) techniques were investigated in a Se-rich sample. The results revealed that the large majority of Se in the endosperm was present in organic forms.en_US
dc.identifier.citationEnvironmental Science and Technology 43, 6024-6030en_US
dc.identifier.urihttp://197.255.68.203/handle/123456789/2469
dc.language.isoenen_US
dc.publisherAmerican Chemical Societyen_US
dc.titleSelenium characterization in the global rice supply chainen_US
dc.typeArticleen_US

Files

License bundle

Now showing 1 - 2 of 2
Loading...
Thumbnail Image
Name:
license.txt
Size:
1.82 KB
Format:
Item-specific license agreed upon to submission
Description:
Loading...
Thumbnail Image
Name:
license.txt
Size:
0 B
Format:
Item-specific license agreed upon to submission
Description: