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期刊论文

Effects of acid and alkaline treatments on physicochemical and rheological properties of tilapia surimi prepared by pH shift method during cold storage

Yang HongshunZhou YigeYang HongshunZhou Yige

Food Research International,2021,145(110424):- | 2021年05月11日

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摘要/描述

Microbial, physicochemical, rheological, and microstructural changes of surimi prepared by pH shift methods and the traditional water-washing method during cold storage were investigated. The starting aerobic mesophilic count (AMC) of pH shift surimi was around 1 log CFU/g lower than water-washed surimi, suggesting antimi- crobial effects of the pH shift. All samples could be stored for 5 to 6 days based on the AMC results. Throughout count (AMC) of pH shift surimi was around 1 log CFU/g lower than water-washed surimi, suggesting antimi- crobial effects of the pH shift. All samples could be stored for 5 to 6 days based on the AMC results. Throughout the storage, the gel strength of alkaline-treated surimi increased from 204.2 to 491.9 g, while water-washed surimi decreased from 462.1 to 172.9 g. After the storage, alkaline-treated surimi showed lower total volatile basic nitrogen (TVB-N) value and smaller network hole size that was suitable for incorporation of moisture and starch. It also remained its rheological properties comparing with acid-treated surimi, with better odour prop- erties, less protein degradation, and better network formation. The results indicate that alkaline-treated surimi is more suitable for cold storage.

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