Corn food products intrinsically labeled with zinc-65 for studies on bioavailability of zinc in humans
1984
Garcia, W.J. | Peplinski, A.J. | Anderson, R.A. | Inglett, G.E.
Corn food products intrinsically labeled with radioactive 65Zn were prepared for use in determining the bioavailability of Zn in humans from corn foods. A defatted endosperm-hull fraction of whole kernel corn, originally derived from corn plants intrinsically labeled with 65Zn, was incorporated with nonradioactive ground corn grits to yield a nonflaked, nontoasted, labeled food product. A second labeled food product was prepared in an identical manner and this product was further processed into toasted cornflakes. Comparable unlabled products were also prepared. The abundance ratio of total Zn and 65Zn present in the labeled food products at the start of the feeding studies, as determined by atomic absorption and .gamma.-ray spectrometry, respectively, was .apprx. 3 .times. 106:1.
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