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Microbial decontamination of red pepper powder by cold plasma

机译：低温等离子体对红辣椒粉的微生物净化作用

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摘要

Effects of the microwave-powered cold plasma treatments (CPTs) on the inhibition of microorganisms in red pepper powder, including Aspergillus flavus and Bacillus cereus spores, were investigated. Combinations of heat treatment with CPT were investigated for the inhibition of B. cereus spores on the powder. The number of A. flavus was reduced by 2.5 ± 0.3 log spores/g by the CPT with nitrogen at 900 W and 667 Pa for 20 min. CPT at 900 W and 667 Pa for 20 min inhibited naturally occurring total aerobic bacteria in the red pepper powder by approximately 1 log CFU/g. B. cereus spores were inhibited (3.4 ± 0.7 log spores/g reduction) only when heat treatment at 90 ℃ for 30 min was integrated with the CPT using a helium-oxygen gas mixture at 900 W. Fermi's model and Weibull model adequately described the inhibition of A. flavus on the red pepper powder by the CPT. The changes in treatment temperature and water activity were less than 5.0 ℃ (initial temperature: 23.8 ℃) and 0.22, respectively, and were affected by both treatment power and time (P < 0.05). The CPTs have demonstrated the potential to reduce the microbial counts of red pepper powder and other powder products.
机译：研究了微波冷等离子体处理（CPT）对红辣椒粉中微生物的抑制作用，包括黄曲霉菌和蜡样芽胞杆菌孢子。研究了用CPT结合热处理对粉状芽孢杆菌孢子的抑制作用。在200 W和667 Pa的氮气下，CPT将黄曲霉的数量降低了2.5±0.3 log log孢子/ g。在900 W和667 Pa下进行20分钟的CPT抑制了红辣椒粉中自然存在的总需氧细菌约1 log CFU / g。仅当在900 W的氦气-氧气混合物中将90℃热处理30分钟与CPT结合使用时，蜡状芽胞杆菌的孢子才被抑制（3.4±0.7 log孢子/ g减少）。Fermi模型和Weibull模型充分描述了通过CPT抑制红辣椒粉上的黄曲霉。处理温度和水分活度的变化分别小于5.0℃（初始温度：23.8℃）和0.22，并且受处理能力和时间的影响（P <0.05）。 CPT已证明有潜力减少红辣椒粉和其他粉状产品的微生物数量。

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  • 来源
    《Food microbiology》 |2014年第4期|128-136|共9页
  • 作者

    Jung Eun Kim; Dong-Un Lee; Sea C. Min;

  • 作者单位

    Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 139-774, Republic of Korea;

    Department of Food Science and Technology, Chung-Ang University, 72-1 Nae-ri, Daedeok-myeon, Ansung-si, Gyunggi-do 456-756, Republic of Korea;

    Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 139-774, Republic of 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

    Cold plasma; Nonthermal process; Red pepper; Bacillus cereus; Fermi's model; Weibull model;

    机译：冷等离子体;非热过程;辣椒;蜡状芽孢杆菌费米模型威布尔模型;

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