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| Presentation | 2019-01-22 10:30 [Poster Presentation] Effect of sonication frequency on inactivation of bacteria and fungi Yuko Hashimoto, Ken Yamamoto (Kansai Univ.)  US2018-78 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (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) |
| (in English) | ultrasonic cavitation / inactivation / Escherichia coli / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 118, no. 409, US2018-78, pp. 1-5, Jan. 2019. | |
| Paper # | US2018-78 | |
| Date of Issue | 2019-01-15 (US) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | US2018-78 |
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| Conference Information | |
| Committee | EA US |
| Conference Date | 2019-01-22 - 2019-01-23 |
| 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 |
| Paper Information | |
| Registration To | US |
| Conference Code | 2019-01-EA-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | 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 |
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| 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.) |
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| Speaker | Author-1 |
| Date Time | 2019-01-22 10:30:00 |
| Presentation Time | 120 minutes |
| Registration for | US |
| Paper # | US2018-78 |
| Volume (vol) | vol.118 |
| Number (no) | no.409 |
| Page | pp.1-5 |
| #Pages | 5 |
| Date of Issue | 2019-01-15 (US) |
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