Pacific white shrimp ( Litopenaeus vannamei ) shell chitosan and the conjugate with epigallocatechin gallate: Antioxidative and antimicrobial activities

Abstract

The shrimp processing industry generally generates low-valued and unwanted by-products such as shells, cephalothorax, and tails, which result in a detrimental impact on the environment when improper treatments or disposal are implemented (Sagheer et al., 2009). Generally, shrimp processing by-products are rich sources of bioactive compounds such as astaxanthin, chitin, bioactive peptides, fatty acids, amino acids, etc. (Kandra et al., 2012). Globally, approximately 6-8 million tonnes of shrimp shell wastes

Extraction and Physicochemical Characterization of Chitosan from Pink Shrimp (Parapenaeus longirostris) Shell Wastes

“…There are many studies showing that chitin and chitosan are prepared by biological and chemical methods. The chemical extraction processes of chitosan have been developed by many researchers by trying different methods (Amoo et al 2019;Abirami et al 2021;Hao et al 2021;Mittal et al 2021;Vallejo-Dominguez et al 2021). Traditional isolation of chitin from crustacean shell waste consists of three basic steps: demineralization to remove calcium carbonate and calcium phosphate separation and deproteinization to separate protein and decolorization to removal of pigments.…”

Use of nanoliposome loaded with chitosan‐epigallocatechin gallate conjugate for shelf‐life extension of refrigerated Asian sea bass (Lates calcarifer) slices

“…CE conjugate was prepared as tailored by Mittal et al (2020). The prepared CE conjugate had conjugation efficiency and total phenolic content of 90.83 AE 0.48% and 74.65 AE 0.88 mg EGCG/g sample, respectively, as assayed using Folin-Ciocalteu reagent.…”

The impact of chitosan film or chitosan/chitosan–epigallocatechin gallate conjugate composite film on the quality changes of Asian sea bass (Lates calcarifer) slices stored in air or under vacuum packaging

“…This might be due to the higher and continuous release of antimicrobial substances from CS/CE conjugate composite film, especially when vacuum was applied, which favoured the contact between film and ASBS. The interaction of the NH 2 and OH groups of CS and CE conjugate, respectively, with the outer layer of bacterial cell wall enhanced antimicrobial activity via disruption of bacterial cell wall (Mittal et al, 2021a).…”

“…The polycationic nature of CS and phenolic groups of EGCG present in CE conjugate are known to inhibit both Gram-negative bacteria (GNB) and Gram-positive bacteria (GPB). As a consequence, CE conjugate is able to preserve foods like fish, which spoil mainly due to the rapid microbial growth (Mittal et al, 2021a). However, there is no information on the use of bioactive film based on CS and its derivative, especially CE conjugate for the shelf-life extension of fish slices.…”