Article ID Journal Published Year Pages File Type
223709 Journal of Food Engineering 2013 7 Pages PDF
Abstract

Atlantic salmon (Salmo salar) fillets were partial frozen in an impingement freezer at −30 °C and 227 W/m2.K for 2.1 min prior to storage at a superchilling storage temperature of −1.7 ± 0.3 °C for 28 days. The aim of this article is to study the microstructure of the red and white muscles during superchilling process and during superchilled storage. The histology and microscopic analysis of the red and white muscles were carried out. It was found that the size of the ice crystals formed in the red muscles was smaller than those formed in the white muscles. The equivalent diameters of the intracellular ice crystals obtained upon superchilling (day 0) were 17 ± 2 and 29 ± 1 μm for the red and white muscles, respectively. Significant differences were initially observed between the size of the ice crystals formed during the superchilling process and after 1 day of storage. However, after temperature equalisation (day 1), there was no significant change in the size of the ice crystals.

► The microstructure size in red and white muscles of salmon was studied. ► We observed differences of the microstructure size in red and white muscles. ► We observed differences of crystals between superchilling process and storage. ► The knowledge of microstructure in superchilling could improve food quality.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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