強電界パルスを用いた液状全卵の低温殺菌

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: 2017/11/01

タイトル(英語): Low-temperature Pasteurization of Liquid Whole Egg using Intense Pulsed Electric Fields

著者名: 馬場　一磨（熊本大学大学院自然科学研究科），梶原　大河（熊本大学大学院自然科学研究科），渡邊　将吾（熊本大学大学院自然科学研究科），勝木　淳（熊本大学パルスパワー科学研究所），笹原　亮（キユーピー（株）），井上　和幸（キユーピー（株））

著者名(英語): Kazuma Baba (Graduate School of Science & Technology, Kumamoto University), Taiga Kajiwara (Graduate School of Science & Technology, Kumamoto University), Shogo Watanabe (Graduate School of Science & Technology, Kumamoto University), Sunao Katsuki (Institute of Pulsed Power Science, Kumamoto University), Ryo Sasahara (Kewpie Co., Ltd.), Kazuyuki Inoue (Kewpie Co., Ltd.)

キーワード: 強電界パルス，低温殺菌，液状全卵，リポタンパク，膜電位　　pulsed electric fields，low-temperature pasteurization，liquid whole egg，lipoprotein，membrane potential

要約(英語): This paper describes the pasteurization of liquid whole egg using intense pulsed electric fields (PEF) combined with mild heat. Four kinds of liquids as solvents including carboxymetyl cellulose solution (CMC), CMC solution with adding lipoproteins extracted from liquid whole egg (CMC+), liquid whole egg (LWE), and centrifuged LWE for reducing lipoproteins (LWE-) were compared for the effectiveness of the PEF pasteurization. The liquids including enterobacter aerogenes (107 /mL) were subjected to a number of PEF with an amplitude of 30 kV/cm or 50 kV/cm. Pre- and post-PEF thermal treatments with a temperature below 55℃ were used to enhance the killing effect. Our experiments show that the bacteria reduction ratios of the pasteurization using 30 kV/cm PEF for CMC, CMC+, LWE and LWE- were 6.6, 2.4, 1.4 and 1.6, respectively, whereas the reduction ratios were all more than 6 when the increased field of 50 kV/cm. Only bacteria in CMC solution were effectively killed compared to other liquids which includes lipoproteins more or less. Numerical analysis of the electric field indicates the presence of lipoproteins in the vicinity of bacteria lessens the bacterial membrane potential, which results in weakening the killing effect.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.137 No.11 （2017） 特集：電気電子絶縁材料システムシンポジウム

本誌掲載ページ: 668-673 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/137/11/137_668/_article/-char/ja/