Summary
Rats were treated intraperitoneally with the gold-containing compounds sodium aurothiomalate (Myocrisin), sodium aurothiosulfate (Sanocrysin), and aurothioglucose. Using stem energy dispersive X-ray analysis, gold and silver were shown to be located at the same point in lysosomes of proximal tubular cells of the kidney, in hepatocytes and in macrophages of lymph glands, spleen and liver. This result indicates that, after exposure to ultraviolet radiation, chemically bound tissue gold is transformed to metallic gold that subsequently can catalyze the reduction of silver ions to silver when subjected to physical development, i.e. exposed to a photographic developer containing silver ions in addition to the reducing molecules.
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Danscher, G., Hansen, H.J. & Møller-Madsen, B. Energy dispersive X-ray analysis of tissue gold after silver amplification by physical development. Histochemistry 81, 283–285 (1984). https://doi.org/10.1007/BF00495640
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DOI: https://doi.org/10.1007/BF00495640