The coating deters microorganisms to fight both food waste and foodborne illness
Packaging is essential for preserving and distributing many kinds of foods, but it often incorporates plastic—scraps of which already litter too much of the planet, posing a threat to wildlife and contaminating drinking water and soil. Now researchers say they have developed a nontoxic, biodegradable and antimicrobial food coating that could reduce food waste and foodborne illness without adding plastic to the environment.
Plastics can stick around in the environment for a long time—potentially forever—but the new coating is biodegradable. That’s because of its primary ingredient: pullulan, an edible fiber that is “generally recognized as safe” by the U.S. Food and Drug Administration.
The team also tested how much the coating improved food safety. When the researchers pitted it against common foodborne pathogens, including E. coli, Listeria innocua and Aspergillus fumigatus, they saw a reduction in both bacterial and fungal populations. They also found that avocados with the coating were less likely to rot: just 50 percent of these fruits went bad over the course of a week, compared with 90 percent of the uncoated produce.
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