Effect of different heat treatments on bacillus subtilis spores inactivated by ultraviolet irradiation

Daisuke Hamanaka, Hironori Yamada, Vipavee Trivittayasil, Takashi Kadoyanagi, Fumihiko Tanaka, Toshitaka Uchino

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The influence of a combination of ultraviolet (UV) irradiation with infrared radiation heating (IRH) and conductive heating (CH) on the inactivation of bacterial spores (Bacillus subtilis) was investigated at 20, 30, 40, and 50°C on the surface of agar plates. The survival curves of B. subtilis spores were convex downward. Generally, the inactivation efficiency of UV irradiation with IRH was greater than that with CH for B. subtilis spores. A 4.1 log reduction of B. subtilis spores was obtained by 60 sec of UV irradiation with IRH at 50°C. The highest decimal reduction time was obtained at around 30°C of IRH. These variations in the inactivation characteristics of UV irradiation might be caused by differences in the UV and IR absorption characteristics of spores exposed at different temperatures.

Original languageEnglish
Pages (from-to)289-293
Number of pages5
JournalFood Science and Technology Research
Volume17
Issue number4
DOIs
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Food Science
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering
  • Marketing

Fingerprint Dive into the research topics of 'Effect of different heat treatments on bacillus subtilis spores inactivated by ultraviolet irradiation'. Together they form a unique fingerprint.

Cite this