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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number K8904-1

Nutritionist Cindy Davis prepares to count the number of precancerous lesions in tissue from the intestines of a rat that was fed high-selenium broccoli and injected with a carcinogen.

Photo by Russ Hanson.

640 pixels wide: (k8904-1.jpg)

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Last Modified: 5/23/2006
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