Organically bound iron in lake sediments and its availability to uroglena americana, a freshwater red tide chrysophyceae.
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Organically bound iron in the interstitial water of a lagoon sediment was fractionated successively by ultrafiltration, cation exchange column, and gel-filtration. Each fraction was bioassayed for iron availability to a fresh water red tide Chrysophyceae, <I>Uroglena americana</I>. Iron bound to anionically charged ninhydrin reactive organic compounds (molecular weight around 300-600 dalton) promoted the growth of <I>U. americana</I>. Iron-complexing capacity of interstitial water was estimated at <I>ca</I>. 14 μM as an equivalent concentration of iron available to <I>U. americana</I>.
- 日本陸水学会の論文
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