[Microbial growth kinetics model of specific spoilage organisms and shelf life prediction for tilapia at fluctuating temperatures].
It was studied on the growth kinetics model of specific spoilage organisms Pseudomonas spp. for cultured tilapia during aerobic storage at fluctuating temperatures from 0degreesC to 15degreesC and the applicability of the model in predicting the remaining shelf life. The mathematical model based on the effect of temperature on Pseudomonas spp. growth kinetics was developed by a Belehradek type equation. Bias and accuracy factors range from 0.906 to 0.942 and from 1.13 to 1.19, respectively, by comparing predicted value using Pseudomonas spp. growth kinetics model with observed value of Pseudomonas spp. growth for cultured tilapia stored at fluctuating temperatures under two kinds of fluctuating temperature designed . Relative errors by comparing remaining shelf life predicted based on growth model of Pseudomonas spp. with remaining shelf life experimentally determined by analyzing organoleptic, VBN and the number of Pseudomonas spp. on tilapia are 5.9 % and - 9.1%, respectively. It shows that the growth kinetics model of Pseudomonas spp. is valuable for rapid and realistic remaining shelf life prediction of cultured tilapia stored aerobically at fluctuating temperatures from 0- 15 degrees C.
Xu
Zhong
Z
Key and Open Laboratory of Marine Estuarine Fisheries, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai. xuzhong@smmail.cn
Yang
Xian-shi
XS
Guo
Quan-you
QY
Xiao
Lin-lin
LL
D000818:Animals; D007700:Kinetics; D008954:Models, Biological; D011549:Pseudomonas / Q000254:growth & development*; D013696:Temperature; D017210:Tilapia / Q000382:microbiology*