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Mild heat and ultraviolet radiation in sequence to inactivate Alicyclobacillus acidoterrestris spores in apple juice.

机译:依次进行温和的加热和紫外线照射以灭活苹果汁中的酸热脂环酸芽孢杆菌孢子。

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摘要

Mild heat followed by UV treatment was investigated in this study on apple juice inoculated with the spores of Alicyclobacillus acidoterrestris. Commercially pasteurized apple juice was inoculated with the spores of Alicyclobacillus acidoterrestris and subjected to mild heat treatment to ensure at least 90 % spore germination. The juice was then subjected to UV-C light of intensity between (1.4-1.6) mW/cm 2 for various times between 10 s to 600 s. A 4.2 log reduction was obtained upon combined heat treatment at 52 °C for 38 min followed by UV-C treatment of (1.4-1.6) mW/cm2 for 60 s. This treatment was compared with commercial pasteurization by head space GC-MS analysis for volatile fraction in apple juice and sensory evaluation of taste, color, and smell. Our results indicated that the quality attributes did not change due to combined heat and UV-C treatment of the commercially pasteurized juice.
机译:在本研究中,对用酸热脂环酸芽孢杆菌孢子接种的苹果汁进行了温和的加热,然后进行紫外线处理。将商业巴氏灭菌的苹果汁用酸热脂环酸杆菌的孢子接种,并进行温和的热处理,以确保至少90%的孢子发芽。然后使汁液经受强度在(1.4-1.6)mW / cm 2之间的UV-C光照射10 s至600 s。在52°C进行38分钟的联合热处理后,经(1.4-1.6)mW / cm2的UV-C处理60 s,可降低4.2 log。通过顶空GC-MS分析将这种处理方法与商业巴氏消毒法进行比较,以分析苹果汁中的挥发性成分,并对其味道,颜色和气味进行感官评估。我们的结果表明,由于商业巴氏杀菌果汁的加热和UV-C处理相结合,质量属性没有改变。

著录项

  • 作者

    Manivannan, Vahini.;

  • 作者单位

    Rutgers The State University of New Jersey - New Brunswick.;

  • 授予单位 Rutgers The State University of New Jersey - New Brunswick.;
  • 学科 Food science.
  • 学位 M.S.
  • 年度 2016
  • 页码 81 p.
  • 总页数 81
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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