| Presentation | 2019-01-22 [Poster Presentation] Effect of sonication frequency on inactivation of bacteria and fungi Yuko Hashimoto, Ken Yamamoto, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Heat, ultraviolet light, and chemicals have all been used for disinfection of foods, but unpleasant tastes and denaturation are often cited as problems with these methods. Disinfection by ultrasonic waves (sonication) has attracted attention because it has less influence on food quality. Previous studies have shown that ultrasonic cavitation causes bacterial and fungal inactivation by both physical and chemical mechanisms. However, determining the mechanism of inactivation can be complicated, as it differs depending on the nature of the microorganisms. In this study, the characteristics of bacterial and fungal inactivation via different frequencies of ultrasonic waves were investigated in the fungus Saccharomyces cerevisiae, and in the bacteria Bacillus subtilis and Escherichia coli. From these experiments it was found that the optimum frequency for inactivation varies depending on the nature of the microorganisms. Presumably, the deactivation mechanism is different at different frequencies, but is likely to involve, among other things, active oxygen, cellular destruction, and cellular mechanical resonance. Furthermore, we examined the effect of acoustic power on E. coli at the optimum inactivation frequency. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | ultrasonic cavitation / inactivation / Escherichia coli |
| Paper # | US2018-78 |
| Date of Issue | 2019-01-15 (US) |
| Conference Information | |
| Committee | EA / US |
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| Conference Date | 2019/1/22(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Doshisha Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonics, and Related Topics |
| Chair | Suehiro Shimauchi(Kanazawa Inst. of Tech.) / Shinichi Takeuchi(Toin Univ. of Yokohama) |
| Vice Chair | Kenichi Furuya(Oita Univ.) / Kanji Watanabe(Akita Pref. Univ.) / Minoru Kurosawa(Tokyo Inst. of Tech.) / Jun Kondo(Shizuoka Univ.) |
| Secretary | Kenichi Furuya(Shizuoka Inst. of Science and Tech.) / Kanji Watanabe(NHK) / Minoru Kurosawa(Univ. of Tokyo) / Jun Kondo(Kanagawa Univ.) |
| Assistant | Keisuke Imoto(Ritsumeikan Univ.) / Daisuke Morikawa(Toyama Pref Univ.) / Daisuke Koyama(Doshisha Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Engineering Acoustics / Technical Committee on Ultrasonics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Poster Presentation] Effect of sonication frequency on inactivation of bacteria and fungi |
| Sub Title (in English) | |
| Keyword(1) | ultrasonic cavitation |
| Keyword(2) | inactivation |
| Keyword(3) | Escherichia coli |
| 1st Author's Name | Yuko Hashimoto |
| 1st Author's Affiliation | Kansai University(Kansai Univ.) |
| 2nd Author's Name | Ken Yamamoto |
| 2nd Author's Affiliation | Kansai University(Kansai Univ.) |
| Date | 2019-01-22 |
| Paper # | US2018-78 |
| Volume (vol) | vol.118 |
| Number (no) | US-409 |
| Page | pp.pp.1-5(US), |
| #Pages | 5 |
| Date of Issue | 2019-01-15 (US) |