Title of article :
Modeling inactivation kinetics of liquid egg white exposed to UV-C irradiation
Author/Authors :
Unluturk، نويسنده , , Sevcan and At?lgan، نويسنده , , Mehmet R. and Baysal، نويسنده , , A. Handan and Unluturk، نويسنده , , Mehmet S.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Abstract :
The efficiency of UV-C irradiation as a non-thermal pasteurization process for liquid egg white (LEW) was investigated. LEW inoculated with Escherichia coli K-12 (ATCC 25253), pathogenic strain of Escherichia coli O157:H7 (NCTC12900) and Listeria innocua (NRRL B33314) were treated with UV light using a bench top collimated beam apparatus. Inoculated LEW samples were exposed to UV-C irradiation of known UV intensity of 1.314 mW/cm2 and sample depth of 0.153 cm for 0, 3 5, 7, 10, 13, 17 and 20 min. The populations of E. coli K-12, E. coli O157:H7 and L. innocua were reduced after 20 min of exposure by 0.896, 1.403 and 0.960 log CFU respectively. Additionally, the inactivation data obtained for each strain suspended in LEW was correlated by using Weibull (2 parameter), Log-Linear (1 parameter), Hom (2 parameter) and modified Chick Watson (2 parameter) models. The inactivation kinetics of E. coli K-12, E. coli O157:H7 and L. innocua were best described by modified Chick Watson model with the smallest root mean squared error (RMSE) (R2 ≥ 0.92).
Keywords :
Weibull model , Hom model , log-linear model , UV-C irradiation , Liquid egg white , inactivation kinetics , Modified Chick Watson model
Journal title :
International Journal of Food Microbiology
Journal title :
International Journal of Food Microbiology