Biomineralization of Gold: Biofilms on Bacterioform Gold
2006
Reith, Frank | Rogers, Stephen L. | McPhail, D.C. | Webb, Daryl
Bacterial biofilms are associated with secondary gold grains from two sites in Australia. 16S ribosomal DNA clones of the genus Ralstonia that bear 99% similarity to the bacterium Ralstonia metallidurans--shown to precipitate gold from aqueous gold(III) tetrachloride--were present on all DNA-positive gold grains but were not detected in the surrounding soils. These results provide evidence for the bacterial contribution to the authigenic formation of secondary bacterioform gold grains and nuggets.
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