Injury of Escherichia coli K12 by hydrostatic pressure treatment with rapid decompression

Seiji Noma, Mitsuya Shimoda, Isao Hayakawa

Research output: Contribution to journalArticlepeer-review


We previously found that hydrostatic pressure treatment combined with a rapid decompression (about 2 ms; RD treatment) had a higher bactericidal effect than that with a slow decompression (about 30 s; SD treatment). To further improve the bactericidal efficiency, it is important to make clear the mechanistic aspects of the RD treatment. Therefore, in the present study we tried to detect the injury of Escherichia coli K12 cells using the differential plating method with selective and non-selective agar plates after the SD and RD treatments at 300 MPa and 25°C. The results obtained suggested that the RD treatment had no additional effect on reducing the cellular ability to synthesize essential components. However, the RD treatment accelerated the damages to cell envelope including outer membrane and cytoplasmic membrane compared to the SD treatment. Therefore, it was expected that the envelope damages were one of the major targets of the RD treatment.

Original languageEnglish
Pages (from-to)153-158
Number of pages6
JournalJournal of the Faculty of Agriculture, Kyushu University
Issue number1-2
Publication statusPublished - Oct 2003

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science


Dive into the research topics of 'Injury of Escherichia coli K12 by hydrostatic pressure treatment with rapid decompression'. Together they form a unique fingerprint.

Cite this