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首页> 外文期刊>Food microbiology >Effect of 222-nm krypton-chloride excilamp treatment on inactivation of Escherichia coli O157:H7 and Salmonella Typhimurium on alfalfa seeds and seed germination
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Effect of 222-nm krypton-chloride excilamp treatment on inactivation of Escherichia coli O157:H7 and Salmonella Typhimurium on alfalfa seeds and seed germination

机译：222纳米氪 - 氯化物激素治疗对大肠杆菌O157灭活的影响：H7和沙门氏菌紫米硫脲对苜蓿种子和种子萌发

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摘要

We examined the control effect of a 222-nm KrCl excilamp on foodborne pathogens on alfalfa seeds and compared it with a conventional 254-nm low-pressure (LP) Hg lamp. When the 222-nm KrCl excilamp treated seeds at 87, 174 and 261 mJ/cm(2), the log reductions of Escherichia coli O157:H7 (E.coli O157:H7) were 0.85, 1.77, and 2.77, respectively, and Salmonella Typhimurium (S. Typhimurium) experienced log reductions of 1.22, 2.27, and 3.04, respectively. When the 254-nm LP Hg lamp was applied at 87, 174, and 261 mJ/cm(2), the log reductions of E. coli O157: H7 were 0.7, 1.16, and 1.43, respectively, and those of S. Typhimurium were 0.75, 1.15, and 1.85, respectively. Therefore, it was shown that the 222-nm KrCl excilamp was more effective than the 254-nm LP Hg lamp in reducing foodborne pathogens. The germination rate decreased to less than 80% after 261 mJ/cm(2) treatment with the 254-nm LP Hg lamp, while more than 90% was maintained with 261 mJ/cm(2) 222-nm KrCl excilamp treatment. DNA damage assay showed that the difference in germination rate was due to DNA damage resulting from 254-nm LP Hg lamp treatment. However, 222 nm KrCl excilamp treatment did not cause DNA damage, resulting in no difference in germination rate compared to that of non-treated alfalfa seeds. Overall, these results demonstrate the utility of the 222-nm KrCl excilamp as a foodborne pathogen control intervention for the alfalfa seed industry.
机译：我们检查了222纳米KRCL Excilamp对苜蓿种子的食物载病原体的控制效果，并将其与传统的254nm低压（LP）Hg灯进行比较。当222nm Krcl Excilamp处理的种子在87,174和261mM / cm（2）时，大肠杆菌O157：H7（E.coli O157：H7）的对数减少分别为0.85,1.77和2.77， Salmonella Typhimurium（触风蕈核酸）分别经历了1.22,2.27和3.04的数值减少。当在87,174和261mM / cm（2）处施加254-nm LP Hg灯时，大肠杆菌O157：H7的对数减少分别为0.7,1.16和1.43，以及S. Typhimurium的原点分别为0.75,1.15和1.85。因此，结果表明，222nm Krcl Excilamp比在减少食物中载体的254nm LP Hg灯中更有效。在261mM / cm（2）处理用254-nm LP Hg灯处理后，发芽率降低至小于80％，而超过90％以261mJ / cm（2）222nm Krcl Excilamp治疗保持。 DNA损伤测定表明，萌发率差异是由于254-Nm LP HG灯处理导致的DNA损伤。然而，222nm Krcl Excilamp治疗没有引起DNA损伤，导致与未处理的苜蓿种子相比的发芽率没有差异。总体而言，这些结果证明了222纳米KRCL Excilamp作为苜蓿种子工业的食源性病原体控制干预的效用。

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  • 来源
    《Food microbiology》 |2019年第9期|171-176|共6页
  • 作者

    Kang Jun-Won; Lee Jae-Ik; Jeong Soo-Yeon; Kim Yu-Min; Kang Dong-Hyun;

  • 作者单位

    Seoul Natl Univ Res Inst Agr & Life Sci Ctr Food & Bioconvergence Dept Agr Biotechnol Dept Food & Anim Biotechnol Seoul 08826 South Korea|Seoul Natl Univ Inst Green Bio Sci & Technol Pyeongchang Gun 25354 Gangwon Do South Korea;

    Seoul Natl Univ Res Inst Agr & Life Sci Ctr Food & Bioconvergence Dept Agr Biotechnol Dept Food & Anim Biotechnol Seoul 08826 South Korea|Seoul Natl Univ Inst Green Bio Sci & Technol Pyeongchang Gun 25354 Gangwon Do South Korea;

    Seoul Natl Univ Res Inst Agr & Life Sci Ctr Food & Bioconvergence Dept Agr Biotechnol Dept Food & Anim Biotechnol Seoul 08826 South Korea|Seoul Natl Univ Inst Green Bio Sci & Technol Pyeongchang Gun 25354 Gangwon Do South Korea;

    Seoul Natl Univ Res Inst Agr & Life Sci Ctr Food & Bioconvergence Dept Agr Biotechnol Dept Food & Anim Biotechnol Seoul 08826 South Korea|Seoul Natl Univ Inst Green Bio Sci & Technol Pyeongchang Gun 25354 Gangwon Do South Korea;

    Seoul Natl Univ Res Inst Agr & Life Sci Ctr Food & Bioconvergence Dept Agr Biotechnol Dept Food & Anim Biotechnol Seoul 08826 South Korea|Seoul Natl Univ Inst Green Bio Sci & Technol Pyeongchang Gun 25354 Gangwon Do South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ultraviolet irradiation; excilamp; Alfalfa seed; Seed germination; Bacteria;

    机译：紫外线辐照;Excilamp;苜蓿种子;种子萌发;细菌;

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