Effect of Non-meat Protein Addition on Quality Characteristics of Nanjing Sausages

This paper was aimed to improve sausage quality by adding non-meat protein. The effects of adding of four non-meat proteins: Spray-dried blood cells (SBC), soybean protein isolate (SPI), egg white protein (EWP), and porcine plasma protein (PPP) on the quality of Nanjing sausages were investigated. The sensory properties, cooking loss, pressure juice loss, water activity, color difference, chewiness, and microstructure were analyzed. The results showed that among these 4 proteins, the sensory quality and chewiness of Nanjing sausage products were overall improved by adding EWP, in which chewiness was increased by 14.73% compared to the control group. The sausages by adding PPP was significantly increased the water-retaining property, where the steaming loss rate and pressure loss rate was decreased by 13.31% and 55.79%, respectively. The low-field NMR results of sausages by adding SPI and PPP showed that a tendency for T21 was left-shifted. The addition of SBC to sausages was significantly (P<0.05) increased a^* values and darker sausages. HE staining results indicated that sausages by adding PPP and SBC groups had a more compact structure. Based on the analysis of other indexes in this paper, it was concluded that PPP was the best cross-linked with pork protein, so as to improve the quality of Nanjing sausage to a certain extent.