Abstract
Nisin is produced by Lactococcus lactis subsp. lactis and is also known as an antimicrobial agent especially effective against gram-positive bacteria. It has long been used as a preservative in foods and beverages and is generally regarded as safe (GRAS). In the present work, the effects of different concentrations of nisin (0.2, 0.4 and 0.8%) on the sensory, chemical and microbiological quality and shelf-life of vacuum-packed sea bass (Dicentrarchus labrax) fillets were investigated during chilled (4 ± 2 °C) storage. The sensory points for raw and cooked fillets increased with time during the storage period (p < 0.05). The control group, with scores of 9.08, was rejected by panelists on day 12; whereas nisin-treated groups were rejected on day 14 with scores ranging from 9.00-9.17 score. As a result of chemical analyses, lower values (p < 0.05) were obtained from the nisin groups with low oxidative rancidity. Moreover, nisin inhibited microbial growth, which shows antimicrobial activity. Consequently, it was concluded that the application of nisin (especially 0.8%) preserved the organoleptic quality and extended the shelf-life of sea bass fillets.
Subject
Organic Chemistry,Food Science
Reference38 articles.
1. Abbas KA, Mohamed A, Jamilah B, Ebrahimian M. 2008. A review on correlations between fish freshness and pH during cold storage. Am. J. Biochem. Biotechnol. 4, 416-421.
2. . Differentiation of cultured and wild sea bass (Dicentrarchus labrax): total lipid content, fatty acid and trace mineral composition. Food Chem. 79;Alasalvar;145-,2002
3. Anonymous. 2000. "http:rraids.medscape.comrreutersrprofr1999r10r10.28rpb10289b.html", 2000. Marathon Enterprises Recalls Hotdogs Due to Possible Listeria Contamination.
4. Antonocopoulus N. 1973. Bestimmung des flüchhtigen basensticktoofs. Fische und Fischerzeugnisse 224-225.
5. AOAC. 1984. Official Methods of Analysis of the Association of the Official Analysis Chemists. Washington DC: Association of Official Analytical Chemists.