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Hot Products of the 2007 Inc. 500

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Hot Products of the 2007 Inc. 500

Researchers at the University of Northern Iowa created this industrial lubricant from local soybeans. Soybean oil oxidizes in machines, so the professors had to stabilize it through genetic and chemical modification. Amtrak and the Beijing subway grease their rails with the product. And it's an ecofriendly lubricant: When it drips into the earth, bacteria consume it, which rejuvenates petroleumsoaked soil. Pounds sold in 2006: three million. Price: A 14-ounce tube wholesales for $1.80; a 2,100-pound container, $4,100.

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