Document Type : Research Article
Authors
University of Tabriz
Abstract
During storage of eggs, unfavorable changes occur due to exertion of CO2 and water vapor from through of crust pinholes. One of the practical methods for preventing or reducing these changes is to use biopolymer-based coatings. In this research, five coating solutions based on carboxymethyl cellulose (CMC) and glycerol as plasticizer, oleic acid (1 and 2% V/V) and antimicrobial agents (potassium sorbate, natamycin and butylated hydroxyanisole) were prepared and their effects on physicochemical properties of the eggs (weight loss, pH, Haugh unit (HU) and yolk index (YI)) were evaluated at room temperature (25 ) during 5 weeks storage. The results showed that CMC- based coatings have considerable effects on quality of eggs and shelf life of them increased 1-3 weeks (depending on coating type). As well as, adding oleic acid to the CMC- based coating had positive significant effects (P < 0.05) on quality parameters of eggs during 5 week storage. Adding antimicrobial compounds also caused significant difference in all parameters, except yolk index, in comparison to CMC coating without antimicrobial compounds.
Keywords
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