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Studying the effect of chitosan coating enriched with orange waste extract on bacterial counts and chemical properties in sturgeon fillets during storage at refrigerated temperature
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Banafsheh Shojaa   , Abbasali Motallebi * , Behrouz Akbari-adergani , Nourdahr Rokni |
| Department of Food Hygiene, SR.C., Islamic Azad University, Tehran, Iran |
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Abstract: |
| This research focused on the development of chitosan-based biofilms with different concentrations of orange peel extract (0.5%, 1% and 1.5%). The aim of this study was to evaluate the effect of these films on the number of aerobic mesophilic bacteria and psychrophilic bacteria and the chemical properties of beluga fillets during storage at 4 °C. The results of the study of the thickness of biofilms prepared with different concentrations of orange extract showed that with increasing the concentration of the extract up to 1%, the thickness of the films increased and its maximum reached 52 μm (p<0.05). The studies showed that the maximum tensile strength in the biofilm without extract was 5.66 MPa and the strain point was 60. The average number of total viable bacteria in the samples at time intervals of 0, 4, 8, 12 and 14 in fillets coated with biofilms containing extract was significantly lower than the control and biofilm without extract (p<0.05). Over time, the number of total viable bacteria in the samples increased significantly in all treatments except for the 1.5% biofilm treatment (p<0.05). Over time, the total number of Staphylococcus aureus and Escherichia coli in the samples increased significantly in all treatments except for 1 and 1.5% biofilm coating (p<0.05). The present study showed that chitosan coatings containing orange peel extract, due to their high antioxidant activity phenolic compounds and other bioactive compounds, are able to inhibit the growth of spoilage microorganisms and reduce lipid oxidation in sturgeon fillets. |
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| Keywords: Orange peel extract, chitosan, beluga fish |
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Type of Study: Research |
Subject:
General
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