Shelf-life prediction and changes in physicochemical and sensory indicators in live Manila clam Ruditapes philippinarum sealed package at different temperatures
PAN Lanlan1,2, JIANG Jielan1, QU Min3, MU Gang2, XUE Zhanfeng2, HUANG Daiyu2, ZHANG Ning2, ZHANG Guochen2*
1.Key Laboratory of Mariculture & Stock Enhancement in North China’s Sea, Ministry of Agriculture and Rural Affairs, Dalian Ocean University, Dalian 116023, China; 2.College of Mechanical and Power Engineering, Dalian Ocean University, Dalian 116023, China; 3.College of Food Science and Engineering, Dalian Ocean University, Dalian 116023, China
Abstract: Changes in physicochemical and sensory indicators were determined in live Manila clam Ruditapesphilippinarum treated by sealed package in the forms of vacuum, and filed with oxygen and air at 0, 5, 10 and 15 ℃ to investigate the effects of different temperatures and gas conditions on the quality of sealed package live Manila clam and establish the reaction kinetics model of total bacterial count, pH value, chrominance, and glycogen content by Arrhenius equation for shelf-life prediction. The results showed that sealed packaging with oxygen was more conductive to keeping the quality of live clam. The sensory quality and glycogen content were shown to be decreased in the live Manila clam, and the total bacterial count, pH value and the chrominance to be increased with extension of store and transportation duration, therefore the reaction rate of those quality indices were accelerated with the increase in storage temperature. The kinetics model and Arrhenius equation described quality indices including total bacterial density, pH value, chrominance and glycogen content in oxygen packaging, chrominance, pH value and glycogen content in vacuum packaging, and total bacteria density and glycogen content in air packaging, with the relative error of less than 20% between the expected values and measured values. The findings indicated that the dynamic models established in this study were effective in predicting the shelf life and provided satisfactory references with the seal package clam.
2020, Vol. 35 
