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Pullulan-based coatings for preservation of razor clam Sinonovacula constricta
1Jiangsu Marine Resources Development Research Institute, Lianyungang, Jiangsu 222005, China; School of Marine Science and Technology, Huaihai Institute of Technology, 59 Cangwu Road, Xinpu 222005, China; Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Huaihai Institute of Technology, Lianyungang 222005, China; Co-Innovation Center of Jiangsu Marine Bio-Industry Technology, Huaihai Institute of Technology, Lianyungang 222005, China.
Abstract:
Glutathione has antioxidant activity, and citric acid exhibits acidity. Potassium sorbate displays antibacterial activity. Effects of pullulan-based coatings with 0.05% glutathione, 0.5% citric acid and 0.2% potassium sorbate on the preservation of razor clam Sinonovacula constricta meats (SCMs) during refrigerated storage (∼2°C) were investigated. The glutathione-, citric acid- and potassium sorbate-incorporated pullulan-based coatings inhibited bacterial growth. Moreover, results showed reduced increase in pH, decreased total volatile basic nitrogen and enhanced overall acceptability score of SCMs during refrigerated storage (∼2°C). These results indicated that treatment with pullulan-based coatings with glutathione, citric acid and potassium sorbate could prolong the shelf life of SCM for up to 10 days.
