Blue LEDs, once confined to the world of digital displays and Blu-ray players, have just found a new calling: food preservation. New research at the National University of Singapore shows the potential of using blue LEDs as a chemical-free method to kill bacteria that lead to spoilage.
Earlier this year, public concern about artificial preservatives pushed fast-food restaurants like McDonald's, Subway, and Panera to seriously rethink the ways they keep their food fresh. Using blue LEDs could potentially kill the same bacteria that preservatives do without any of the scary, outrage-rousing chemicals.
The researchers looked at the effect of blue LED exposure on three of the major colonies of bugs that cause food to rot and stomachs to turn: Listeria, E. coli, and Salmonella. Their paper, published in the journal Food Microbiology, showed that the blue lights succeeded in inactivating the bacteria, with even better results in cold temperatures and acidic conditions. Foods like fresh-cut fruit, chilled meats, and ready-to-eat seafood, like sushi and lox, could all someday benefit from the pathogen-killing lights.
https://www.inverse.com/article/5154-blue-leds-are-the-future-of-food-preservation
(Score: 1) by anubi on Saturday August 08 2015, @08:42AM
Here is an example of some 460-465 nm blue 10-Watt LED chips.... [aliexpress.com]
520-525 nm green 10-Watt LEDs here. [aliexpress.com]
Just in case you are curious as to how much these things cost on wholesale levels and what they look like.
( Disclaimer... I do not work for AliExpress, nor have I done business with this merchant. I have done business through AliExpress and know how to find stuff on their site, which I did here for the edification of fellow soylenters who may be "learning some ropes" on what is available. )
"Prove all things; hold fast that which is good." [KJV: I Thessalonians 5:21]