Sterilizing Effect of Electron Beam on Ginseng Powders

Electron Beam 조사에 의한 인삼분말의 살균효과

  • Lee, Mi-Kyung (Department of Food Science and Technology, Kyungpook National University) ;
  • Lee, Moo-Ha (College of Agriculture and Life Science, Seoul National University) ;
  • Kwon, Joong-Ho (Department of Food Science and Technology, Kyungpook National University)
  • 이미경 (경북대학교 식품공학과) ;
  • 이무하 (서울대학교 농업생명과학대학) ;
  • 권중호 (경북대학교 식품공학과)
  • Published : 1998.12.01

Abstract

The sterilizing effect of electron beam was compared with that of gamma irradiation for commercial ginseng powders. White and red ginseng powders were contaminated by about $10^5\;CFU/g$ of total bacteria and by $10^3\;CFU$ of coliforms only in white ginseng powder. Data of microbial population for the sterilizing effect of electron beam irradiation showed that no microorganisms were detected in the samples irradiated up to 7.5 kGy for total aerobic bacteria and 2.5 kGy for molds and coliforms. Such doses were effective for controlling the microbial growth in the samples during 4 months of storage at room temperature. Decimal reduction doses $(D_{10}$ value) on the initial bacterial populations were $2.85{\sim}3.75\;kGy$ in electron beam and $2.33{\sim}2.44\;kGy$ in gamma irradiation, which were influenced by the initial microbial loads and the energy applied. Compared with gamma irradiation, electron beam showed a similar result in its sterilizing effect on ginseng powders, suggesting its potential utilization in due time.

Keywords

ginseng powders;electron beam;gamma irradiation;sterilization