牛乳のパルス高電界殺菌における脂肪球の影響

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: 2021/10/01

タイトル(英語): Influence of Fat Globules on Pulsed Electric Field Sterilization of Milk

著者名: 中村　剛丸（熊本大学大学院自然科学教育部），大石　諒（熊本大学大学院自然科学教育部），貫　寛貴（熊本大学大学院自然科学教育部），勝木　淳（熊本大学産業ナノマテリアル研究所），増田　直也（岩井機械工業（株）），清水　喜治（岩井機械工業（株））

著者名(英語): Gomaru Nakamura (Graduate School of Science & Technology, Kumamoto University), Ryo Oishi (Graduate School of Science & Technology, Kumamoto University), Hirotaka Nuki (Graduate School of Science & Technology, Kumamoto University), Sunao Katsuki (Institut

キーワード: 高電界パルス殺菌，牛乳，脂肪球，リステリア菌，電界分布解析 pulsed electric field sterilization，milk，fat globule，Listeria innocua，electric field analysis

要約(英語): The effect of fat globules contained in milk on sterilization using intense pulsed electric field (PEF) is described. PEF with a pulse width of 2 μs and an electric field of 25 kV/cm were applied to four types of bacterial liquids (Listeria innocua, 108 CFU/mL) including carboxymethyl cellulose (CMC) solution, skim milk, homogenized and non-homogenized milk. Temperature history of bacterial solution was precisely controlled so as to be the same under all treatment conditions. The bactericidal effect of PEF was weakest in the non-homogenized milk, whereas it was strongest in the CMC solution. Numerical analysis of the electric field suggests that a fat globule distorts the surrounding electric field and produces the region with the reduced electric field, where bacteria receive less stress. Volume of the region with reduced electric field greatly depends on the diameter of the fat globule. This analysis coincides the experimental results.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.141 No.10 （2021） 特集：9th International Symposium on Electrical Insulating Materials

本誌掲載ページ: 597-603 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/141/10/141_597/_article/-char/ja/