食品与机械2018，Vol.34Issue(1)：104-109,6.DOI:10.13652/j.issn.1003-5788.2018.01.021
鲜切生菜品质指标和菌落总数货架期预测模型的建立与比较
Establishment and comparison of shelf life model about quality index and colony count of fresh-cut lettuce
摘要
Abstract
The influence of different temperature (0,5,10,15 and 20 ℃) on its quality and total number of colonies of fresh-cut lettuce during storage was studied,and the chlorophyll content,vitamin C content and colony total were found decreased with the increase of temperature and storage time.Based on the experimental data,first order kinetic model of chlorophyll and vitamin C and Gompertz model of the total number of colonies were established to predict the shelf life.The results were as follows.Compared with the shelf life model SLD of the total number of colonies based on Arrhenius equation,the accurate factor of shelf life model SLc established by Gompertz equation was 1.25.This indicated that the Gompertz equation could better reflect the microbial growth trend of fresh-cut lettuce in 0～20 ℃ the temperature range.The relative errors of shelf life model SLchlo and SLvc established by Arrhenius equation,and shelf life model SLG of the total number of colonies established by Gompertz equation were 8.89％,4.44％ and 6.67％ respectively.The shelf life model SLyc and SLG had less relative error,showing that the shelf life model based on vitamin C and colony counts could accurately monitor the shelf life of fresh-cut lettuce in the temperature range of 0～20 ℃.关键词
鲜切生菜/货架期/预测模型/Arrhenius方程/Gompertz方程Key words
fresh-cut lettuce/shelf life/prediction model/Arrhenius equation/Gompertz equation引用本文复制引用
乔永祥,谢晶,雷昊..鲜切生菜品质指标和菌落总数货架期预测模型的建立与比较[J].食品与机械,2018,34(1):104-109,6.基金项目
2015年度国家星火计划资助项目(编号:2015GA680007) （编号:2015GA680007）
上海市绿叶菜产业体系建设项目 （）
