Authors: Yohan Yoon JaeNam Park HeeSook Sohn BeomSeok Song JaeHun Kim MyungWoo Byun JuWoon Lee
Publish Date: 2011/04/30
Volume: 20, Issue: 2, Pages: 377-382
Abstract
This study modeled the effect of γirradiation on reducing bacterial populations in space gochujang Korean red pepper paste The gochujang samples were γirradiated at 0 5 10 15 and 20 kGy and stored under accelerated storage condition 35°C for 10 days During storage total bacterial populations in gochujang samples were enumerated on plate count agar PCA on day 0 1 3 5 7 and 10 To calculate maximum specific growth rate µmax log CFU/g/day lag phase duration day low asymptote Y 0 log CFU/g upper asymptote Y max log CFU/g and surviving cell counts recovered with PCA were fitted to the Baranyi equation The parameters then were further expressed as a function of irradiation dose Total bacterial populations in gochujang were decreased to below detection limit 1 log CFU/g after irradiation 5–20 kGy The samples irradiated at 5 10 and 15 kGy then had bacterial cell recovery but no growth was observed in 20 kGy irradiated samples during accelerated storage After validation of models acceptable model performances B factor=115 A factor=129 RMSE=1044 R 2=0862 were observed These results indicate that the developed models may be useful in predicting irradiation doses to produce space gochujang
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