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      • KCI등재

        적색, 초록, 청색 및 혼합광 LED 조사의 식중독균 저해 효과

        문진석(Jin Seok Moon),오명민(Myung-Min Oh),주우하(Woo Ha Joo),한남수(Nam Soo Han) 한국생물공학회 2013 KSBB Journal Vol.28 No.6

        The antimicrobial properties of Light-Emitting Diode (LED) are an area of increasing interest. The aim of this study was to evaluate the bactericidal effects of blue (peak at 456 nm), green (peak at 518 nm), red (peak at 654 nm) and blue-green combined (blue 456 nm : green 558 nm = 69:31) LED irradiation to pathogenic bacteria. For this, LED equipment providing power density of 10 mW/cm2 was installed and plates were exposed to 0.9 or 3.0 mW/cm² to irradiate bacteria with 3.2 to 259.2 J/cm² of energy density. As a result, blue and combined LED have shown bactericidal effects on Escherichia coli KCTC 1467 and Listeria monocytogenes ATCC 19115 after irradiation of 3.0 mW/cm² for 2 and 4 hr, respectively. Staphylococcus aureus KCTC 1916 was inhibited at 518 nm green LED irradiation. However, red LED irradiation showed no inhibitory effect to the other tested strains. Light technology that utilizes the bactericidal properties of blue (at 456 nm) and blue-green(blue 456 nm : green 558 nm = 69:31) combined LED may have potential applications in the food industry sector.

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