Rapid Measurement of Yeast Status using the Phase Angles of Harmonics in the Electrical Response Waveform

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2021/04/01

タイトル(英語): Rapid Measurement of Yeast Status using the Phase Angles of Harmonics in the Electrical Response Waveform

著者名: Keita Tamura (Graduate School of Engineering, Osaka City University), Naoto Higashihara (Graduate School of Engineering, Osaka City University), Daichi Tanaka (Graduate School of Engineering, Osaka City University), Masafumi Muraji (Graduate School of Eng

著者名(英語): Keita Tamura (Graduate School of Engineering, Osaka City University), Naoto Higashihara (Graduate School of Engineering, Osaka City University), Daichi Tanaka (Graduate School of Engineering, Osaka City University), Masafumi Muraji (Graduate School of Eng

キーワード: yeast，phase angles，harmonics，nonlinear electrical properties

要約(英語): We assessed the time dependence of the difference between living and dead yeast suspensions, in terms of the amplitudes and phase angles of their harmonics, when an alternating current (AC) voltage was applied to a yeast suspension. The measurements were repeatable and it was possible to accurately and quickly determine yeast status (living or dead) even within 1 s by reference to the phase angles of the 3rd harmonic. We found that measuring the phase angle of a dead yeast suspension in the system in advance permits us to distinguish between living and dead yeast without the need to calculate their relation to fundamental components such as the amplitude. This method based on the phase angles of harmonics is a powerful and convenient technique for quickly determining the status of yeast. These nonlinear responses change due to the presence of yeast itself and the collection of data on them including phase angles helps us to understand the electrical properties of cells.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.141 No.4 （2021） 特集：2020年基礎・材料・共通部門大会

本誌掲載ページ: 239-244 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/141/4/141_239/_article/-char/ja/