title: Dielectric Spectroscopy of PressurizedSaccharomyces cerevisiae.
abstract: Results of broadband dielectric spectroscopy (BDS) inSaccharomyces cerevisiae(baker's yeast),in situas the function of pressure are presented. They show a clear evidence of a threshold to the new pattern of the pressure evolution of the static dielectric permittivity and DC electric conductivity already forPt≈ 200MPaatT= 5oCandPt≈ 300MPaatT= 25oC. BDS monitoring versus pressure tests up toP= 400MParevealed particularly notable changes of properties after 30 minutes of compressing. Finally, the correlation between the amount of the spectrophotometric maximum absorbance and the DC electric conductivity was found. All these indicate significance of BDS as the tool for testing of pressure properties of cells assemblies, model foods etc.,in situunder high pressures.
authors.affiliation: Institute of Physics & Silesian Intercollegiate Center for Education and Interdisciplinary Research, University of Silesia, ul. 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland.
authors.forename: Szymon
authors.initials: S
authors.lastname: Starzonek
authors.affiliation: Institute of High Pressure Physics, Polish Academy of Sciences, ul. Sokołowska 27/39, 01-142 Warsaw, Poland.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Rutkowska
authors.affiliation: Institute of Physics & Silesian Intercollegiate Center for Education and Interdisciplinary Research, University of Silesia, ul. 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland ; Institute of High Pressure Physics, Polish Academy of Sciences, ul. Sokołowska 27/39, 01-142 Warsaw, Poland.
authors.forename: Sylwester J
authors.initials: SJ
authors.lastname: Rzoska
authors.affiliation: Institute of High Pressure Physics, Polish Academy of Sciences, ul. Sokołowska 27/39, 01-142 Warsaw, Poland.
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Drozd-Rzoska
authors.affiliation: Institute of High Pressure Physics, Polish Academy of Sciences, ul. Sokołowska 27/39, 01-142 Warsaw, Poland.
authors.forename: Monika
authors.initials: M
authors.lastname: Fonberg-Broczek
authors.affiliation: Prof. Wacław Dąbrowski Institute of Agricultural and Food Biotechnology, Departmentof Fruit and Vegetable Product Technology, ul. Rakowiecka 36, 02-532 Warsaw, Poland.
authors.forename: Barbara
authors.initials: B
authors.lastname: Sokołowska
authors.affiliation: University of Berne, Freiestrasse 3, Berne, CH-3012 Switzerland.
authors.forename: Julio C
authors.initials: JC
authors.lastname: Martinez-Garcia
keywords: Dielectric spectroscopy; Foods; High pressures; Yeast