Impact of Packaging Methods on the Storage Quality and Storage Stability of Milled Rice
Milled rice has become one of the necessary reserve materials that emergency departments in various regions of the country must consider.To explore the effects of packaging methods on the storage quality and stability of rice,in this experiment,"Nanjing 46"rice was used as the sample,three packaging methods(sealed,vacuum,and modified atmosphere packaging),five storage temperatures(4,15,25,35,45 ℃),and a storage period of 300 days were set up.The changes in the physicochemical quality of milled rice under different packaging and storage temperatures with storage time were analyzed,the increase of acid value using chemical kinetic models was studied,and the storage stability of rice in different packaging methods was evaluated using the activation energy parameters of the Arrhenius equation.The results indicated that various physical and chemical indicators had changed significantly during storage of rice,and storage temperature and time had significantly influenced nearly all indicators(P＜0.05);the packaging methods had a significant impact on some indicators,such as appearance brightness(P＜0.05).The change in the fatty acid value conformed to the zero-order and first-order kinetic models.The calcu-lated activation energy of milled rice's fatty acid change was less than that of paddy and brown rice,revealing the rel-atively poor storability of processed rice.Furthermore,the activation energy of different storage periods was used to assess the rice's storage stability.It was found that,modified atmosphereand vacuum packaging performed better than conventional sealed packaging in shorter storage periods.However,this advantage gradually decreased with the extension of time.For long-term storage,there was no significant difference in storage effects among the three pack-aging methods.Therefore,for packaged rice,modified atmosphere and vacuum packaging were superior to sealed packaging in short-term storage;however,there were few differences in the storage effects of the three packaging methods in long-term storage conditions.
万方数据
维普
