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Sterilization of Rapeseed Sprouts by Intense Pulsed Light Treatment

고강도 광원을 이용한 새싹 채소의 살균

  • 박희란 (전주대학교 전통식품산업학과) ;
  • 차경희 (전주대학교 한식조리학과) ;
  • 신정규 (전주대학교 한식조리학과)
  • Received : 2015.10.07
  • Accepted : 2016.01.04
  • Published : 2016.02.29

Abstract

In this study, the effects of intense pulsed light (IPL) treatment on microbial inactivation and quality in rapeseed sprouts were investigated. Untreated rapeseed sprouts exhibit a high level of total aerobic bacteria (TAB) ($1.2{\times}10^7CFU/g$), coliform bacteria (coliform) ($3.3{\times}10^6CFU/g$), and pathogenic E. coli (PE) ($2.1{\times}10^5CFU/g$). The microorganisms found on rapeseed sprouts decreased with exposure to increasing light intensity and treatment time. The greatest reduction in microbial content was observed with a treatment of 1000 V, 5 pps for 10 min, where TAB, coliform, and PE levels decreased to 1.0 log CFU/g, 1.6 log CFU/g, and 1.8 log CFU/g, respectively. In agreement with these data, the microbial inactivation rate increased with the increase in the distance between the light source and the samples during IPL treatment. After IPL treatment of rapeseed sprouts, water content and vitamin C content decreased.

Keywords

rapeseed sprouts;intense pulsed light (IPL);non-thermal sterilization

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