Biological food additives application in strawberry storage

The coating agent,which composed of pullulan,e-PL,natamycin and nisin,was used to study the fresh-keeping effect on strawberry storage by a four factor-three level-orthogonal experiment.The ratio of weight-loss and total soluble solids to total acid,vitamin c content were tested.Meanwhile,sensory quality and microbiological index were evaluated.The results showed that the optimum combination were pullulan 10%,e-PL 300mg / L,natamycin 100mg / L and nisin 40mg / L.In this condition,the fresh-keeping effect of strawberry was improved significantly and the storage time was prolonged.