Effect of EGCG-gelatin biofilm on the quality and microbial composition of tilapia fillets during chilled storage

Jun Cao; Qi Wang; Tingting Ma; Kunlu Bao; Xiaoying Yu; Zhenhua Duan; Xuanri Shen; Chuan Li

doi:10.1016/j.foodchem.2019.125454

Effect of EGCG-gelatin biofilm on the quality and microbial composition of tilapia fillets during chilled storage

Food Chem. 2020 Feb 1:305:125454. doi: 10.1016/j.foodchem.2019.125454. Epub 2019 Sep 3.

Authors

Jun Cao¹, Qi Wang¹, Tingting Ma¹, Kunlu Bao¹, Xiaoying Yu¹, Zhenhua Duan², Xuanri Shen¹, Chuan Li³

Affiliations

¹ Hainan Engineering Research Centre of Aquatic Resources Efficient Utilization in the South China Sea, College of Food Science and Engineering, Hainan University, Haikou 570228, China.
² Institute of Food Science and Engineering, Hezhou University, Hezhou 542899, China.
³ Hainan Engineering Research Centre of Aquatic Resources Efficient Utilization in the South China Sea, College of Food Science and Engineering, Hainan University, Haikou 570228, China. Electronic address: lichuan@hainanu.edu.cn.

PMID: 31505413
DOI: 10.1016/j.foodchem.2019.125454

Abstract

The effects of the (-)-Epigallocatechin gallate (EGCG)-gelatin biofilm treatment (EGT) on microbial composition and quality of tilapia fillets stored at low temperatures were evaluated. The changes in mechanical properties, microbial reproduction, as well as lipid and protein oxidation during fillets storage were determined. The results showed that EGT reduced the microbial count and the relative abundance of the fillets. And EGT delayed the rate of lipid oxidation and protein denaturation in fillets. Compared with the control group, EGT samples had lower K values (74% on 18 d) and biogenic amines (39 mg/kg for putrescine and 50 mg/kg for cadaverine on 21 d). According to sensory evaluation, the shelf life of tilapia fillets was extended by 6 d in the EGT group. Therefore, EGT improved the quality of cryopreserved tilapia fillets and could be considered as a potential method for fish fillet preservation.

Keywords: EGCG-gelatin biofilm; High throughput sequencing; Microbial composition; Quality; Tilapia.

MeSH terms

Aeromonas / drug effects
Animals
Biogenic Amines / analysis
Biomimetic Materials / chemistry*
Biomimetic Materials / pharmacology
Catechin / analogs & derivatives*
Catechin / chemistry
Food Storage / methods*
Gelatin / chemistry*
Lipid Peroxidation / drug effects
Protein Denaturation / drug effects
Proteins / chemistry
Pseudomonas / drug effects
Seafood / analysis*
Seafood / microbiology
Taste / drug effects
Temperature

Substances

Biogenic Amines
Proteins
Catechin
Gelatin
epigallocatechin gallate