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Shelf Life of Meat Using Edible Active Packaging Enriched Films
Packaging is one of the most important processes to preserve the quality of food. Edible polymer is an effective alternative to synthetic polymers. Active packaging is incorporating antimicrobials and/or antioxidants in packaging material. Application of these technologies can improve safety of foods. In this study active edible film was formulated and standardised with concentration of 2.25% of sodium alginate, 1% glycerol, 2% CaCl2. Meat was chosen as it is a widely used perishable food. Garlic, atibala and betel leaf were chosen as the sources of active compounds. Betel leaf extract infused films were found to be more acceptable over garlic and atibala infused films. Edible Films (EF) with varying concentrations of betel leaf extract was formulated namely EFS, EF10, EF20, EF30 and EF40. The impact of the extract infused films was studied for its physical and physico-chemical properties, sensory attributes, nutrient content and shelf life extension ability. Varying concentrations of betel leaf extract didn't influence the thickness of the film whereas the film with P.betel leaf extract showed higher grammature values than that of the film without antioxidants. There was a gradual increase in solubility and antioxidant activity as the concentration of P.betel leaf extract increased. The antioxidant activity of EF10, EF20, EF30 and EF40 are 37.12%, 38.48%, 42.37% and 42.89% respectively. Sensory evaluation indicated that EF20 and EF10 had good overall acceptability. Nutrient quality of EF40 was highest followed by the other three formulations EF30, EF20 and EF10 in decreasing fashion. EF20 had acceptable sensory attributes and also possessed better nutrient content with carotene 1.67 mg, iron 4.23 mg and calcium 0.29 g. The seven days total plate count study of meat packed with EF20 revealed higher bacterial count of 5.88±0.087 log CFU g-1 in control than the EF20 i.e., 3.32±0.081 log CFU g-1. The study concludes that the usage of plant based antioxidants and antimicrobials can be effective alternative replacing chemicals used as food packaging material for increasing the shelf life of a food product
Edible Films, Antimicrobial, Antioxidant, Herbal, Betel Leaf, Shelf Life, Meat, Nutrients, Sensory Evaluation.
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