**7. Conclusion**

Biopolymers such as proteins and polysaccharides can be extracted directly from plant or animal biomass. Extensive research is being done on polysaccharides like cellulose, starch, alginate, carrageenan, PLA, PCL to derive desirable biopolymers [63]. According to the research results of a study conducted in 2019 [64]. The results of chemical analysis showed that, in general, Alginate and salt coating slows down the increasing process of indices. Oxidative damage was observed compared to the treatment. The presence of preservatives such as salt and alginate prevents the activity of organisms which itself causes the reduction of protein denaturation and as a result Reduction of water loss and less change of tissue characteristics in some of the studied treatments.

Also alginate with properties Antioxidation delays chemical spoilage It prevents tissue problems [65–67]. Alginate has the ability to form a gel, emulsify, stabilize, and have antioxidant properties, and it prevents the product's fatty acid changes during the storage period [68, 69]. Tugce Senturk Parreidt et al. [47] used alginates, which are naturally occurring polysaccharides in the bio-industry. They are mainly derived from brown algae species. Alginate-based edible coatings and films attract interest for improving/maintaining quality and extending the shelf-life of fruit, vegetable, meat, poultry, seafood, and cheese by reducing dehydration (as sacrificial moisture agent), controlling respiration, enhancing product appearance, improving mechanical properties, etc. The most recent essential information concerns alginate-based edible coatings. The categorization of alginate-based coatings/film in food packaging concept is formed gradually with the explanation of the most important titles. Emphasis will be placed on active ingredients incorporated into alginate-based formulations, edible coating/film application methods, research and development studies of coated food products, and mass transfer and barrier characteristics of the alginate-based coatings/ films. Future trends are also reviewed to identify research gaps and recommend new research areas.
