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Spore inactivation on solid surfaces by vaporized hydrogen peroxide—Influence of carrier material surface properties
Author(s) -
Eschlbeck Elisabeth,
Seeburger Christina,
Kulozik Ulrich
Publication year - 2020
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.15086
Subject(s) - hydrogen peroxide , spore , bacillus subtilis , chemistry , peroxide , surface roughness , population , microbiology and biotechnology , bacteria , materials science , biochemistry , biology , organic chemistry , genetics , demography , sociology , composite material
The aim of this study was to investigate the influence of surface hydrophobicity and roughness of carrier materials on the inactivation of bacterial spores with gaseous hydrogen peroxide whereas condensate formation is prevented. Spores of Bacillus subtilis and Bacillus atrophaeus were applied either as single spore culture or as a mixed spore population to simulate natural contamination with microorganisms of different characteristics. Inactivation with gaseous hydrogen peroxide was carried out at 5200 ppm hydrogen peroxide without condensate formation. The inactivation results of B. subtilis and B. atrophaeus spores on carrier materials with varying surface hydrophobicity differed significantly. However, inactivation of the mixed spore populations resulted in similar resistance compared to the single spore batches. The results of this study indicate that surface hydrophobicity most probably has an impact on the inactivation with gaseous hydrogen peroxide whereas surface roughness only plays a minor role.