Shelf Life Prediction Model of Fresh-cut Kiwifruit Slices Treated with Low-temperature Plasma
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(Shaanxi Normal University,College of Food Engineering and Nutritional Science,Xi'an 710119)

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    Abstract:

    The effect of storage temperature on the quality indexes and total number of colonies of fresh-cut kiwifruit slices treated with low-temperature plasma were studied,and the shelf life prediction models of quality indexes and total number of colonies were established.The fresh-cut kiwifruit slices treated with low-temperature plasma were stored at 0,5,10,15,20,25 ℃,and the VC content,chlorophyll content,total phenol content,total colony count,brittleness,color aberrations and solid-acid ratio were measured regularly.The effect of different temperatures on the quality indexes and the total number of colonies were explored.The fitting equations of monitoring indexes were determined.The shelf life prediction models of the quality indexes and the total number of colonies of fresh-cut kiwifruit slices were established by combining the Arrhenius model and the Belehradck model.The results show that the storage temperature has no significant effect on the solid-acid ratio,total phenol content and chlorophyll content,while the storage temperature has significant effect on color aberration,brittleness,VC content and total colony count.The changes of VC content,brittleness,color aberration and total colony count of fresh-cut kiwifruit slices treated with low-temperature plasma follow the first-order reaction,first-order reaction,zero-order reaction and Logistics equation models respectively during storage.The shelf life prediction models (SLbrittleness,SLcolor aberration,SLVC,SLcolony) of fresh-cut kiwifruit slices quality index and total bacterial colonies was effective.The relative errors of the shelf life prediction models were 4.03%,3.41%,2.4% and 2.8% respectively under the storage condition of 3 ℃.The models can be used to predict the shelf life of fresh-cut kiwifruit slices treated with low-temperature plasma under 0-25 ℃ storage conditions.

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  • Received:January 17,2021
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  • Online: February 11,2022
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