Oct 10, 2016: Dr Yuk claims that blue LED lights alone are enough to eliminate most bacteria. Researchers at National University of Singapore (NUS) have found that LED lights alone can be used as major bug eliminators, capable of destroying bacteria that usually causes food poisoning, including Escherichia coli (E. coli) and Salmonella Typhimurium.
The LEDs have proven quite effective in slightly acidic environment and cold temperatures making it possible for scientists to believe they could lead to a new method of preserving fruit and other goods that is chemical-free.
Faculty of Science, Yuk Hyun-Gyun of NUS?s Food Science and Technology Programme explains that continued contact of blue LED light triggers a process inside the bacterial cells, which causes them to die since their light-sensitive amalgam adsorbs the light.
Assistant Professor Yuk stated, unlike former studies, his is the primary study to showcase that blue LEDs alone can destroy bacteria without the need for adding chemicals like preservatives or light-absorbing amalgams which aid to eliminate bacteria-photosensitisers.
He further added, “This could meet the rising demand for natural or nominally processed foods without depending on chemicals.? His team examined deferral for three types of bacteria including Salmonella and pathogenic E. coli, under blue LEDs, during the latest study. Food poisoning is dangerous as it can kill, since it is caused by consuming perishable products that may be poisoned with bacteria, parasitic or viral agents, and the contamination can happen while the food is being prepared, processed or stored. For example, several athletes suffered alleged food poisoning during the SEA Games in Singapore last month.
This bacterium causes severe vomiting and diarrhoea. Republic Polytechnic?s School of Applied Science?s senior manager Ritu Bhalla stated that while the study shows potential, more work needs to be put in to show the efficiencyof devices that could use blue LEDs for eliminating bacteria.
She also added, “We still need to authenticate whether the lights would be able to kill all the bacteria in food products, owing to the mixture of bacterial strains and quality of food products. Proper storing of food still remains one of the primary steps in preventing food poisoning. I trust people don’t overlook that.?