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United States Department of Agriculture

Agricultural Research Service

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Image Number D1896-6

In Stoneville, Mississippi, biologist Bobbie Johnson adds ammonium hydroxide to Aspergillus cultures to differentiate aflatoxin-producing strains (yellow and red) from nonproducers (off-white).


Photo by Stephen Ausmus.

640 pixels wide: (d1896-6.jpg)

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Last Modified: 8/12/2016
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