For keeping the perfect gas component in modified atmosphere package after opening and resealing of family package, a variable micropore modified atmosphere package was developed to solve this problem.This novel package could automatically reduce the permeability of packaging film after opening and resealing without any electronic device.Then, a verification test was performed using lentinula edodes as an example.The breathing rate of lentinula edodes was measured, and the parameters of micropore were determined by the breathing rate and perfect gas concentration of lentinula edodes.Based on the calculated micropore parameters, a proposed variable micropore modified atmosphere package and a regular micropore modified atmosphere package were manufactured.Furthermore, the gas component, mass loss rate, pH value change and brown stain of lentinula edodes in the aforementioned two modified atmosphere packages were compared after taking out a part of lentinula edodes.The results indicate that the gas component in proposed novel package is maintain well after taking out 1/2 lentinula edodes.Even the taken out lentinula edodes are more or less than 1/2, the gas component in proposed package is also closer to the perfect concentration compare to the regular micropore modified atmosphere package.Furthermore, the lentinula edodes in proposed package also have a less mass loss rate, pH value change and brown stain during the storage.The proposed variable micropore modified atmosphere package can provide a better protection for fresh fruits and vegetables and a longer shelf life than the traditional modified atmosphere package after opening and resealing of package.
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