title: Sporicidal kinetics of Bacillus subtilis spores by heated scallop shell powder.
abstract: Scallop shell powder heated at 1,000 degrees C for 1 h exhibited sporicidal action against Bacillus subtilis spores. The sporicidal kinetics of this action were analyzed with the use of a nonlogarithmic model. Apparent death rate constants (k) were obtained under various conditions. The value of k increased with powder concentration but became constant beyond the concentration representing the solubility of Ca(OH)2. A linear inverse relationship between k and temperature was found, and from this relationship the activation energy required for the death of B. subtilis spores in the heated shell powder slurry could be determined.
authors.affiliation: Department of Applied Chemistry, Kanagawa Institute of Technology, 1030 Shimo-Ogino, Atsugi, Kanagawa 243-0292, Japan. sawai@chem.kanagawa-it.ac.jp
authors.forename: Jun
authors.initials: J
authors.lastname: Sawai
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Miyoshi
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Kojima
mesh_terms: D000818:Animals; D001412:Bacillus subtilis / Q000187:drug effects / Q000254:growth & development / Q000502:physiology*; D002126:Calcium Hydroxide / Q000494:pharmacology*; D005516:Food Microbiology; D005519:Food Preservation; D006358:Hot Temperature; D007700:Kinetics; D008974:Mollusca; D012995:Solubility; D013171:Spores, Bacterial / Q000254:growth & development
chemical_list: D002126:Calcium Hydroxide