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New Spray Coating Preserves Fruits Much Longer

August 11, 2017: 12:00 AM EST
An advanced plant-based technology developed by South Korean scientists not only adds nutrients to fruits, it prolongs their shelf life. The technology comes in the form of a five-second spritz coating of Iron (III)-tannic acid-metal-organic coordination complex (Fe(III)-TA-MOC) for fruits. The spray forms a five nanometers-thick layer (more after additional coats). A field test that analyzed the post-harvest shelf-life of mandarin oranges found that, after 28 days of storage at 77ºF, more than a quarter of the uncoated mandarin oranges (10 out of 37) were rotten and covered with mold. Those spray-coated remained edible. A similar test on strawberries found that, after 58 days of storage at 77ºF, 56.3 percent of sprayed fruit were edible, but only 6.3 percent of the unsprayed. [Image Credit: © Ji Park et al.]
Ji Park et al., "Antimicrobial spray nanocoating of supramolecular Fe(III)-tannic acid metal-organic coordination complex: applications to shoe insoles and fruits", Scientific Reports, August 11, 2017, © Park et al.
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