Different storage temperature on the quality of Phyllostachys praecox
The freezing point of Phyllostachys praecox can be obtained by the analysis of relationship between freezing point and sample's moisture content or soluble solids.Seven physicochemical properties were selected to investigate the quality changes during the different storages,which were weight loss rate,color value,soluble protein content,PAL activity,POD activity,crude fiber and lignin.Then the effect of temperature-cold storage (4 ℃),super chilling storage (-3 ℃) and frozen storage (-18 ℃) on the quality of Phyllostachys praecox during the storage was compared with room temperature product.Furthermore,the microstructure of Phyllostachys praecox was observed by atomic force microscopy.The results indicated that the storage time of Phyllostachys praecox in the room temperature and cold storage were 6 and 18 days respectively,while those in the super chilling and frozen storage were 30 days.The skin roughness during the frozen storage (Ra =30.683,Rq =40.892) was higher than that of super chilling (Ra =14.516,Rq =18.517).Therefore,considering of the quality and economic effects,the super chilling storage can not only keep its native flavor,but also extend the storage time and save the cost.
国家科技期刊平台
NSTL
万方数据
维普
