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首页> 外文期刊>Journal of Food Science >Factors Affecting Radiation D-Values (D_(10)) of an Escherichia Coli Cocktail and Salmonella Typhimurium LT2 Inoculated in Fresh Produce
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Factors Affecting Radiation D-Values (D_(10)) of an Escherichia Coli Cocktail and Salmonella Typhimurium LT2 Inoculated in Fresh Produce

机译：新鲜农产品中接种大肠杆菌和鼠伤寒沙门氏菌LT2的辐射D值（D_（10））的影响因素。

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摘要

This study evaluated the effect of produce type, resuspension medium, dose uniformity ratio (DUR), and sample preparation conditions (tissue exposure, MAP, anoxia) on the Dto-value of an Escherichia coli cocktail (BAA-1427, BAA-1428, and BAA-1430) and Salmonella Typhimurium LT2 inoculated on the surfaces of tomato, cantaloupe, romaine lettuce, and baby spinach. Produce at room temperature were irradiated using a 1.35 MeV Van de Graaf electron beam accelerator at 0.2 to 0.9 kGy. The D_(10)-values for E. coli and Salmonella were 0.20 ± 0.01 kGy and 0.14 ± 0.01 kGy, respectively. Bacterial inactivation was not affected by produce type as long as the samples were irradiated in unsealed bags, the bacteria were suspended in broth, and the sample tissue was exposed. Sample location in front of the e-beam source during exposure is crucial. A 20% increase in DUR yielded a 53% change in the D_(10)-values. Variations in sample preparation, microbiological methods and irradiation set-up, result in variable D_(10)-values for different microorganisms on fresh produce.
机译：这项研究评估了农产品类型，重悬培养基，剂量均匀度（DUR）和样品制备条件（组织暴露，MAP，缺氧）对大肠杆菌鸡尾酒（BAA-1427，BAA-1428，和BAA-1430）和鼠伤寒沙门氏菌LT2接种在番茄，哈密瓜，长叶莴苣和婴儿菠菜的表面。使用1.35 MeV Van de Graaf电子束加速器以0.2至0.9 kGy照射室温下的产品。大肠杆菌和沙门氏菌的D_（10）值分别为0.20±0.01 kGy和0.14±0.01 kGy。只要将样品放在未密封的袋子中辐照，细菌悬浮在肉汤中并暴露样品组织，细菌灭活就不受产品类型的影响。曝光期间样品在电子束源前面的位置至关重要。 DUR增加20％，D_（10）值变化53％。样品制备，微生物学方法和辐照设置的变化会导致新鲜农产品上不同微生物的D_（10）值变化。

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  • 来源
    《Journal of Food Science》 |2012年第6期|p.E104-E111|共8页
  • 作者

    Rosana G. Moreira; Alex F. Puerta-Gomez; Jongsoon Kim; M. Elena Castell-Perez;

  • 作者单位

    Dept. of Biological and Agricultural Engineering, Texas A&M Univ., College Station, TX 77843-2117, U.S.A;

    Dept. of Biological and Agricultural Engineering, Texas A&M Univ., College Station, TX 77843-2117, U.S.A;

    Dept. of Biological and Agricultural Engineering, Texas A&M Univ., College Station, TX 77843-2117, U.S.A;

    Dept. of Biological and Agricultural Engineering, Texas A&M Univ., College Station, TX 77843-2117, U.S.A;

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

    engineering; food irradiation; food safety; fruits and vegetables;

    机译：工程;食物辐照;食品安全;水果和蔬菜;

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