Chemical, Microbiological, Color and Textural Changes in Nile Tilapia (Oreochromis niloticus) Fillets Sterilized by Ozonated Water Pretreatment During Frozen Storage

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• 作者：Yongqiang Zhao ; Xianqing Yang ; Laihao Li ; Shuxian Hao ; Ya Wei ; Jianwei Cen and Hong Lin
• 刊名：Journal of Food Processing and Preservation
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：41
• 期：1
• 全文大小：189K
• ISSN：1745-4549

文摘

To assess the impact of ozonated water pretreatment on fish quality, Nile tilapia fillets were sterilized by 4.5 mg/L ozone-containing water for 30 min and stored at −18 ± 1C for 180 days. Untreated fillets were used as controls. Quality changes during storage were assessed by chemical, microbiological analysis, color and texture measurements in both groups. The results showed that the pH did not significantly differ in both groups at various time points during storage and did not exhibit a significant correlation with the microbiological data, which reflects the changes in quality during frozen storage. Malondialdehyde content and K-values increased in the control and ozone-treated fillets samples after 180 days of frozen storage. Ozonated water treatment had antimicrobial, bleaching and textural quality enhancement effects on tilapia fillets processing. In conclusion, the tilapia fillets quality can be improved partly and shelf life can be extended well after ozonated water pretreatment.