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VIDEO: Nanotech Could Soon Replace Food Expiration Dates

Pennsylvania is one of the strictest states when it comes to sell-by dates on milk: It has to be within 17 days of the date the milk was pasteurized. Milk canā€™t be sold after that, so itā€™s either thrown or given away. The policy isnā€™t about food safety. The Pennsylvania Department of Agriculture says itā€™s a quality issue.Ā But a physics professor at Indiana University of Pennsylvania thinks heā€™s accidentally hit on a better way to tell how fresh your milk is. Greg Kenning and his students were working on a completely different project that involved embedding magnetic nanoparticles ofĀ cobalt into the semi-metal antimony. And they noticed some interesting things about the magnetic and electronic properties of these elements as they decay with time and temperature.Ā (Video by Ryan Loew / Reporting by Kara Holsopple)

 

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