6533b7d5fe1ef96bd1265193
RESEARCH PRODUCT
Effect of heat activation and inactivation conditions on germination and thermal resistance parameters of Bacillus cereus spores.
P.s. FernándezAvelina FernándezMaría José OcioAntonio Martínezsubject
Spores BacterialBacillaceaeHot TemperatureTime FactorsbiologyThermal resistancetechnology industry and agricultureBacillus cereusAnalytical chemistryColony Count MicrobialGeneral Medicinebiology.organism_classificationMicrobiologyBacillalesModels BiologicalIsothermal processMicrobiologySporeBacillus cereusGerminationZ-valueFood Sciencedescription
The effect of isothermal and non-isothermal heat activation on germination and thermoresistance of two strains of Bacillus cereus spores was studied. Results indicated that the germination after isothermal activation was lower than after non-isothermal heating. The activation rate affected the z value, which increased with faster heating rates. For each temperature and inactivation rate, the non-isothermal activation at rate of 2 degrees C/min resulted in larger D values (D90 = 4.70 min) than isothermal activation (D90 = 4.04 min). The two mathematical equations used to analyse non-isothermal data produced similar predicted D and z values, nevertheless the Hayakawa equation modified in this work for non-linear regression analysis, requires less computational effort.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-02-01 | International journal of food microbiology |