不同贮藏温度下鲈鱼腐败菌生长动力学与货架期预测
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农业部海水鱼产业体系保鲜与贮运岗位科学家项目、上海市科技兴农2015年重点攻关项目(沪农科攻字(2015)第4-12号)和上海市科技兴农重点攻关项目(沪农科攻字(2016)第4-4号)


Growth Kinetics of Spoilage Organisms and Prediction of Shelf Life for Lateolabrax japonicus at Different Storage Temperatures
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    摘要:

    为快速预测鲈鱼在不同温度下特定腐败菌的生长规律,模拟了鲈鱼的4种贮藏温度:流化冰贮藏(-1.8℃)、碎冰贮藏(0℃)、冷藏1(4℃)与冷藏2(10℃),分析了不同温度下鲈鱼的菌落总数、希瓦氏菌与假单胞菌数,并测定了相应条件下鲈鱼货架期终点时的总挥发性盐基氮和QI值。采用修正的Gompertz方程描述鲈鱼特定腐败菌的动态变化,分别以Belehradek平方根方程和Arrhenius方程建立微生物生长预测模型。结果表明,修正的Gompertz方程能准确描述4种贮藏温度下鲈鱼特定腐败菌的生长规律,希瓦氏菌和假单胞菌的腐败阈值分别为(6.48±0.41)lg CFU/g 与(6.33±0.36)lg CFU/g。通过碎冰贮藏组(0℃)和模拟流通组(流化冰预冷(-1.8℃)—无冰运输(0.8℃)—碎冰贮藏(0℃))样品对模型适用性进行验证,得出基于Belehradek方程的希瓦氏菌、假单胞菌生长预测模型偏差度分别为0.9936、0.9510和1.0242、0.9821,准确度分别为1.0845、1.0425和1.1075、1.0934,货架期预测模型相对误差绝对值在0~10%,准确度优于Arrhenius方程。因此,由Belehradek方程建立的模型能更准确描述鲈鱼在常规流通方式下希瓦氏菌和假单胞菌的生长规律,可为鲈鱼流通货架期的预测提供理论依据。

    Abstract:

    The aim was to predict the growth of specific spoilage organisms (SSO) for Lateolabrax japonicus at different storage temperatures. The circulation of Lateolabrax japonicus was simulated by different storage methods, such as slurry ice storage (-1.8℃), crush ice storage (0℃), cold storage 1 (4℃) and cold storage 2 (10℃). The kinetic growth of total viable counts, Shewanella counts and Pseudomonas counts were analyzed respectively, and the total volatile base nitrogen (TVB-N) and Quality index (QI) value at the end of the shelf life of Lateolabrax japonicus were evaluated at different temperatures. On the basis of the dynamic change of SSO with modified Gompertz equation, Belehradek equations and Arrhenius equations were used to construct the prediction models of growth and shelf life for SSO. The results showed that the modified Gompertz equation could describe the dynamic microbial growth in Lateolabrax japonicus at different storage temperatures and the average minimum corruption values of Shewanella counts and Pseudomonas counts were (6.48±0.41) lg CFU/g, (6.33±0.36) lg CFU/g respectively. Meanwhile, the applicability of models were validated under crush ice storage (0℃) and temperature-fluctuation conditions (slurry ice precooling (-1.8℃)-transportation without ice (0.8℃) -crush ice (0℃)). The bias factors (Bf) and accuracy factors (Af) of Shewanella counts and Pseudomonas counts from the models based on Belehradek equations were 0.9936, 0.9510 and 1.0242, 0.9821 and 1.0845, 1.0425, 1.1075, 1.0934, respectively, and the relative errors of shelf life model were within the range of 0~10%. The accuracy of Belehradek equation was better than that of Arrhenius equation. In conclusion, the models obtained by Belehradek equations were more effective for predicting the growth of SSO and the shelf life of Lateolabrax japonicus at different storage temperatures so as to provide the theoretical basis for predicting the shelf life of Lateolabrax japonicus.

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蓝蔚青,张皖君,段贤源,吴启月,卢瑛,谢晶.不同贮藏温度下鲈鱼腐败菌生长动力学与货架期预测[J].农业机械学报,2018,49(4):351-358. LAN Weiqing, ZHANG Wanjun, DUAN Xianyuan, WU Qiyue, LU Ying, XIE Jing. Growth Kinetics of Spoilage Organisms and Prediction of Shelf Life for Lateolabrax japonicus at Different Storage Temperatures[J]. Transactions of the Chinese Society for Agricultural Machinery,2018,49(4):351-358.

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  • 收稿日期:2017-09-21
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  • 在线发布日期: 2018-04-10
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