Abstract
Plant proteins and polysaccharides are often utilised in ground meat products as meat binders, gelling agents, texture stabilisers or fat substitutes. The aim of this study was to investigate the effects of the incorporation of 57 g kg(-1) soy protein isolate (SPI), 7 g kg(-1) carrageenan (CAR) and SPI/CAR mixture on the quality of ground pork patties. Ground pork patties with individual SPI and CAR or SPI/CAR mixture showed either retained or improved emulsion stability, physicochemical properties and dynamic rheology compared with control samples. Although there were no significant colour differences among treatments, samples with SPI/CAR mixture presented higher texture profile values for hardness and chewiness compared with other treatments (P < 0.05). Patties with additives showed significantly lower cooking loss and better thermal emulsion stability than control samples owing to a lower release rate of water and fat (P < 0.05). Compared with control samples or those with individual SPI and CAR, patties with SPI/CAR mixture formed a smoother and more continuous structure with a more compact protein matrix. The results indicate that a mixture of SPI and CAR can be effectively used as a functional ingredient to improve the quality of ground pork patties.
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