The Actinomycete Gordonia amicalis HS-11 produced orange pigments when cultivated on n-hexadecane as the sole carbon source. When cells of this pigmented bacterium were incubated with 1mM chloroauric acid (HAuCl4) or silver nitrate (AgNO3), pH 9.0, at 25°C, gold and silver nanoparticles,
Several pigments (beta-, gamma-carotenes and lycopene) have been isolated from the culture of the mutant strain of Actinomyces sp. 2 var. PIII related to Actinomyces chrysomallus. The pigments were identified by the position of maxima and absorption of light by the pigments within the range of 400
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