Blue LEDs can be used to preserve food

Blue light emitting diodes (LEDs) have strong antibacterial effect on major foodborne pathogens and can be used as a chemical-free food preservation method, a new study has found.  The team, led by Yuk Hyun-Gyun from the National University of Singapore Faculty of Science, found that blue LEDs are most effective when in cold temperatures (between 4 degrees Celsius and 15 degrees Celsius) and mildly acidic conditions of around pH 4.5. This opens up novel possibilities of using blue LEDs as a chemical-free food preservation method, researchers said.