한국식품저장유통학회지 (Food Science and Preservation)

  • 제15권5호
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  • Pages.754-759
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  • 2008
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  • 3022-5477(pISSN)
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  • 3022-5485(eISSN)
한국식품저장유통학회 (The Korean Society of Food Preservation)
권호 표지

이산화염소수 및 구연산처리에 따른 무(Raphanus sativus L.) 새싹과 종자의 미생물 제어 효과

Effect of Aqueous Chlorine Dioxide and Citric Acid on Reduction of Salmonella typhimurium on Sprouting Radish Seeds

  • 발행 : 2008.10.31
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초록

새싹 채소 중 무순의 위생적인 재배 조건을 설정하기 위하여 종자세척 및 관수로서 이산화염소수, citric acid 및 glycerin의 적용 효과를 조사하였다. 무 종자에 인위적으로 오염시키기 위하여 Salmonella typhimurium은 실험실 조건에서 배양하였으며, 무 종자를 S. typhimurium 현탁액에 침지시켜 균수를 약 $10^6\;log\;CFU/g$로 조절하였다. 무 종자에 대한 세척 효과는 이산화염소수 및 citric acid의 단독처리보다 병행처리시 더욱 우수한 효과를 나타내어, 이산화염 소수 200 ppm과 citric acid 2%의 병행처리시 2.89 log CFU/g 의 감소효과를 나타내었다. 또한, glycerol 0.5%/citric acid 2.0% 처리의 경우 3.46 log CFU/g, glycerol 0.5%/이산화염 소수 200 ppm 처리는 2.14 log CFU/g의 S. typhimurium 균의 감소를 나타내어, glycerol 단독 처리보다 병행처리구가 더 우수한 효과를 나타내었다. 무 종자의 발아 및 성정에 따른 균수 감소는 비록 종자에 대한 처리효과가 유의적으로 있었음에도 불구하고 새싹 성장 후 균수의 차이는 미미하였다.

The effect of citric acid-aqueous chlorine dioxide ($ClO_2$) treatment of radish seeds artificially contaminated with Salmonella typhimurium was studied. Radish seeds were inoculated by immersion, in more than 106 log CFU/g seed, of a suspension of S. typhimurium, dried, and stored sealed at $4^{\circ}C$ Radish seeds soaked in 200 ppm aqueous ClO2 solution for 10 min showed a bacterial reduction of 1.08 log CFU/g seed, and the lowering of microbial burden noted in seeds soaked in 2% (w/v) citric acid solution for 10 min was 2.89 log CFU/g seed. Next, radish seeds were exposed to 0.5% (v/v) glycerol solution for 10 min either before or after treatment with 200 ppm aqueous ClO2 or 2% (w/v) citric acid for 10 min. Glycerol exposure after citric acid treatment reduced bacteria by 3.46 log CFU/g seed, and glycerol treatment after aqueous $ClO_2$ treatment reduced the microbial burden by 2.14 log CFU/g seed. Both glycerol treatments yielded better elimination of S. typhimurium than did a single treatment with either citric acid or aqueous $ClO_2$. Radish seeds inoculated with S. typhimurium were treated throughout the entire growth period. Although radish seed treatment was effective, treatment by citric acid and aqueous $ClO_2$ after sprouting was not effective to eliminate S. typhimurium.

키워드

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