Strontium-85 and Calcium-45 Uptake by Rat from Brown Seaweeds

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The brown seaweeds have a preference for ⁸⁵Sr and take this nuclide two to three times as much as ⁴⁵Ca from sea water. Three kinds of brown seaweeds which previously incorporated ⁸⁵Sr and ⁴⁵Ca were administered to rats by a stomach tube. Amount of ⁸⁵Sr which was retained in these rats was much less than that in control group, while there was no significant difference for ⁴⁵Ca retention. These facts are attributable to alginate contained in the brown seaweeds.