Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 101, Issue -, Pages 448-454Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2017.03.038
Keywords
Grass carp (Ctenopharyngodon idellus); Chitosan coating; Glycerol monolaurate; K-value; Microbiological quality; Shelf life
Funding
- Collaborative innovation center of food safety and quality control in Jiangsu Province
- [CARS-46]
- [NSF31301508]
- [KYLX-1163]
- [BN2015118]
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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. (C) 2017 Published by Elsevier B.V.
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