Preparation of Edible Film Containing Sesame Oleosomes and Its Application in Strawberry Preservation

Abstract

This study investigated the effects of adding different amounts of sesame oleosomes on the properties of polysaccharide edible films, and explored the application of the film incorporated with sesame oleosomes in strawberry preservation in terms of sensory evaluation and physicochemical indexes. The results showed that the extracted sesame oleosomes contained 72.3% fat, which could maintain good oxidative stability for 8 days. Adding an appropriate amount of sesame oleosomes to edible films could effectively improve the softness, water vapor barrier, solubility and elongation. However, adding excess sesame oleosomes (≥ 5.6%) decreased the mechanical properties and transparency. Taken together, the optimal proportion of oleosome addition was 1.2%. Compared with the blank and oleosome-free control groups, the oleosome-incorporated film effectively delayed the rotting and softening of strawberry fruits as well as the decrease in moisture, soluble solids and titratable acids, and extended the shelf life by at least 1 day. This study showed that a certain amount of oleosomes can be used as lipid derivatives in lipid-based edible films to extend the shelf life of fruits and vegetables.

Keywords

• sesame; oleosome; edible films; strawberry preservation