title: The shelf life extension of refrigerated grass carp (Ctenopharyngodon idellus) fillets by chitosan coating combined with glycerol monolaurate.
abstract: A novel chitosan-based coating solution was prepared by combining glycerol monolaurate (GML) for shelf life extension of refrigerated grass carp fillets. The control and coated fillets were analyzed periodically for physicochemical (pH, thiobarbituric acid (TBA) value, total volatile basic nitrogen (TVB-N) value, K value, and shear force), microbiological (total viable counts (TVC), psychrophilic bacteria counts (PTC), Pseudomonads and H2S-producing bacteria) and sensorial characteristics. The results showed that chitosan-GML coated samples presented better quality preservation effects than chitosan coating alone. In addition, 2% chitosan enriched with 0.3% GML showed the significant (P<0.05) effectiveness in inhibiting microbial growth, nucleotide breakdown, the formation of alkaline components and texture deterioration, and maintaining sensory acceptability among the groups. These findings confirmed that chitosan coating enriched with GML was a promising method to extend the shelf life of refrigerated fillets.
authors.affiliation: State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.
authors.forename: Dawei
authors.initials: D
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.
authors.forename: Qixing
authors.initials: Q
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.
authors.forename: Yanshun
authors.initials: Y
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China. Electronic address: xiaws@jiangnan.edu.cn.
authors.forename: Wenshui
authors.initials: W
authors.lastname: Xia
mesh_terms: D000818:Animals; D002347:Carps / Q000382:microbiology; D048271:Chitosan / Q000737:chemistry*; D061353:Food Storage / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007848:Laurates / Q000737:chemistry* / Q000494:pharmacology*; D050178:Monoglycerides / Q000737:chemistry* / Q000494:pharmacology*; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry; D012034:Refrigeration; D013858:Thiobarbiturates / Q000032:analysis; D013997:Time Factors
chemical_list: D007848:Laurates; D050178:Monoglycerides; D013858:Thiobarbiturates; C020777:monolaurin; D048271:Chitosan; C029684:thiobarbituric acid; D009584:Nitrogen
keywords: Chitosan coating; Glycerol monolaurate; Grass carp (Ctenopharyngodon idellus); K-value; Microbiological quality; Shelf life