Blue LEDs to kill bacteria and preserve food

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hank
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Blue LEDs to kill bacteria and preserve food

Copied with a hat tip to Soylent News (one of several groups attempting to replace Slashdot with a better news-sharing collaboration, recommended)

Blue LEDs Are the Future of Food Preservation |

from the blue-lightsaber-to-the-rescue dept.
posted by janrinok on Friday August 07, @15:44 (Science)
https://soylentnews.org/article.pl?sid=15/08/07/0815244

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[0]AnonTechie writes:

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 [1]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 [2]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.

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[4]Original Submission

Discuss this story at: https://soylentnews.org/comments.pl?sid=15/08/07/0815244

Links:

0. https://soylentnews.org/~AnonTechie/ 1. http://www.nytimes.com/aponline/2015/01/02/us/ap-us-fast-food-real-food.... 2. http://www.sciencedirect.com/science/article/pii/S0740002014003116 3. https://www.inverse.com/article/5154-blue-leds-are-the-future-of-food-pr... 4. https://soylentnews.org/submit.pl?op=viewsub&subid=8799
Edited by: hank on 08/08/2015 - 13:53
Wrathbringer27
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Haven’t heard that in the news yet though hmmm

Words can be broken,
so can bones.

ReManG
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Nice find, hopefully the testing will show solid and persistent results…

hank
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tempo
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personally i believe every webpage i read on the www

brad
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tempo wrote:

personally i believe every webpage i read on the www

You should, I read on a blog that it is international law that everything, and every photo on the internet, has to be totally true and absolutely real.

HKJ
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hank wrote:
Blue LEDs Are the Future of Food Preservation

Sounds like somebody is mixing UV and blue leds. Hard UV can get rid of bacteria, but not the type with a lot of blue light (It is not hard UV). 

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

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hank wrote:
0AnonTechie writes: Blue LEDs, once confined to the world of digital displays and Blu-ray players,
I’m afraid AnonTechie doesn’t have a clue what he’s writing about. Even at the first sentence.

Blu-ray players use 405nm near UV lasers, not blue and not an led. H) Blu ray does not mean it uses blue light rays. It’s a marketing name. :ghost:

hank
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The actual published science (at the Google Scholar link above) will help.

As to lasers and diodes: https://www.google.com/search?q=laser+diode

Note also there are quite a few acne treatments now using blue light:

https://scholar.google.com/scholar?q=acne+blue+light

turns out the bacteria that are sensitive contain a pigment that absorbs that wavelength and heats them up.

Worth reading a bit. I often find my opinion can be updated by looking at something written since the last time I learned about a subject.
Which was usually about 40 years ago, admittedly. YMMV.
Exhausting, tho’.

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Halo… wrote:
hank wrote:
0AnonTechie writes: Blue LEDs, once confined to the world of digital displays and Blu-ray players,
I’m afraid AnonTechie doesn’t have a clue what he’s writing about. Even at the first sentence.

Blu-ray players use 405nm near UV lasers, not blue and not an led. H) Blu ray does not mean it uses blue light rays. It’s a marketing name. :ghost:

Most reporters don’t know what they are talking about and Brian Williams was there.

poiihy
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Does this mean we can have refrigerators that are simply a box with blue lights? Big Smile

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Anything beyond surface bacteria is beyond reach of the UV/LED Wink

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