Premium
Modelling inactivation by aqueous chlorine dioxide of Dothiorella gregaria Sacc . and Fusarium tricinctum ( Corda ) Sacc . spores inoculated on fresh chestnut kernel
Author(s) -
Chen Z.,
Zhu C.
Publication year - 2011
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/j.1472-765x.2011.03061.x
Subject(s) - spore , chlorine dioxide , aqueous solution , botany , biology , food science , chemistry , organic chemistry
Aims: To model survival curves of Dothiorella gregaria Sacc. and Fusarium tricinctum ( Corda ) Sacc. spores inoculated on fresh chestnut kernel exposed to aqueous chlorine dioxide (ClO 2 ). Methods and Results: Spores of two dominant spoilage fungi, D. gregaria and F. tricinctum , were inoculated onto chestnut kernel and treated with ClO 2 . The inactivation efficacy of ClO 2 treatment increased with ClO 2 concentration and treatment time. The Weibull model was the best model to describe the ClO 2 survival curves of D. gregaria , while the modified Gompertz model was most appropriate for fitting the survival curves of F. tricinctum . Within the range of ClO 2 concentration from 3 to 7 mg l −1 , the n values in the Weibull model were similar. The b value in the Weibull model and decimal logarithms of the M , B and C values in the modified Gompertz model had linear relationships with ClO 2 concentration. After simplification, these two models still provided acceptable predictions. Conclusion: Applying models for describing survival curves of fungal spores on chestnut kernel by aqueous ClO 2 was feasible. Significance and Impact of the Study: This work would promote the application of ClO 2 sanitizing technique and mathematical models when preventing the occurrence of chestnut kernel decay.