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KMID : 0380620130450020248
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Korean Journal of Food Science and Technology
2013 Volume.45 No. 2 p.248 ~ p.251
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Effect of Sterilization by Intense Pulsed Light on Radiation-resistant Bacterium, Micrococcus roseus
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Kim Bo-ra
Kim Ae-Jin
Shin Jung-Kue
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Abstract
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The purpose of this study was to investigate the inactivation effect of intense pulsed light (IPL) on Micrococcus roseus, an irradiation-resistant bacterium isolated from laver, and the commercial feasibility of this sterilization method on dried laver. The inactivation of M. roseus in cultivated plates increased with increasing light intensity and treatment time. Approximately 6.6 log CFU/mL reduction of the cell viability was achieved with IPL treatment for 3 min at 1,000 V of light intensity, tailing was not shown. In addition, the inactivation rate of M. roseus increased with increasing pulse number at same light intensity and treatment time. The killing efficiency for M. roseus increased with by decreasing the distance between the light source and the sample surface.
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KEYWORD
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intense pulsed light (IPL), Micrococcus roseus, non-thermal sterilization, irradiation-resistant bacterium
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