Identification and co-regulation of main residual bacteria in ready-to-eat duck esophagus
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(1. Fujian Province Key Lab for the Development of Bioactive Material from Marine Algae , Quanzhou Normal University , Quanzhou , Fujian 362002 , China ; 2. Fujian Advanced Education Key Laboratory of Inshore Resources Biotechnology , Quanzhou Normal University , Quanzhou , Fujian 362002 , China ; 3. Ankee Food Stuff Co ., Ltd., Quanzhou , Fujian 362000 , China ; 4. Quanzhou Xinqiang Food Co ., Ltd., Quanzhou , Fujian 362013 , China)

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    Abstract:

    [Objective ] This study aimed to analyze the main residual bacteria and control the bacterial growth effectively.[Methods ] The 16S rDNA technology was used to identify the main residual bacteria.The compound antibacterial experiments were carried out to kill the heat-resistance residual bacteria which were screened by high temperature test.[Results ] A total of 47 strains of genera belonging to 8 strains of genera were isolated from 5 groups of samples,including raw and auxiliary materials,final RDEs products spoilaged samples etc.The 8 strains of genera were Bacillus,Streptococcus,Moraxella,Alkalihalobacillus,Kurthia,Lactococcus,Enterococcus and Vagococcus respectively.It was found the RDEs easily caused secondary pollution after mixing the sauce materials contained Bacillus.After high-temperature sterilization,some Bacillus remained in the RDEs which were the same as the spoilage RDEs.Among them,Bacillus genera C7-1 and C 8-3 have the strongest heat resistance.Adding 0.2 g/kg ε-polylysine and 0.5 g/kg citric acid effectively inhibited the growth of two types of Bacillus subtilis.[Conclusion ] For the RDE products,0.2 g/kg ε-polylysine and 0.5 g/kg citric acid were combined with high-temperature sterilization at 110 ℃ for 10 minutes for validation testing.There was no evidence of spoilage or bagging happening from the RDE products after being stored at (36±2) ℃ for 30 days.

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郑瑞生,袁思慧,黄依林,等.即食脆肠中主要残留菌的鉴定及联合调控[J].食品与机械英文版,2024,40(9):116-122.

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History
  • Received:September 04,2023
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  • Online: February 18,2025
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