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Acidovorax bacteria. Coloured scanning electron micrograph (SEM) of Acidovorax sp. bacteria (yellow) partially or fully coated with iron, Fe (II), crusts (orange). This bacterium is usually found in waters with a high iron content, but may also be found in soils that are highly arsenic-contaminated. It is able to precipitate the arsenic out of the soil and bind it, and due to this is being investigated as a means of reducing the amount of arsenic present in rice fields. Magnification: x15,000 when printed at 10 centimetres wide.
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