Professor invents 'ripeness' stickerJuly 26, 2006 in Technology / Engineering
(AP) -- A University of Arizona professor has invented a sticker that can tell consumers if a fruit or vegetable is ripe. The stickers will be available to growers next year and should make their way to supermarkets within two to three years, said Mark Riley, a UA assistant professor of agricultural and biosystems engineering.
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"Professor invents 'ripeness' sticker" July 26, 2006 http://phys.org/news/2006-07-professor-ripeness-sticker.html