Fecha de publicación:
29/10/2024
Fuente: Foods - Revista científica (MDPI)
Foods, Vol. 13, Pages 3468: Comparison Among Food By-Products to Improve the Shelf Life of a Fresh Burger Based on Shelled Shrimps
Foods doi: 10.3390/foods13213468
Authors:
Olimpia Panza
Amalia Conte
Matteo Alessandro Del Nobile
Pomegranate peels, fig peels, and by-products from turnip greens were used as novel ingredients in burgers based on shelled shrimps. With the aim, a control without any by-products and three fortified samples with 7.5% (w/w) by-product were realized. To verify the benefic effects of by-product addition on the chemical quality of burgers, total phenols, total flavonoids, and antioxidant activity were measured in both the control and fortified samples. In addition, during storage under refrigerated conditions, the microbiological proliferation of the main spoilage bacteria, the pH, and the sensory acceptability were properly monitored in all the samples. Results from chemical analyses confirmed that the nutritional level of shrimp-based burgers enriched with by-products was better than that of the control. Burgers with peels from pomegranate recorded the best results (2.67 ± 0.24 mg GAE/g dw, 1.62 ± 0.21 mg QE/g dw, and 12.63 ± 0.41 mg Trolox/g dw for total phenols, flavonoids, and antioxidant activity, respectively). From the microbiological point of view, the bacterial proliferation was always more rapid in the control than in the other samples. Among the by-products, the pomegranate peels better delayed the spoiling phenomena, even though mesophilic and psychrotrophic bacteria grew abundantly and rapidly in all the products, thus reducing the differences among samples. All the burgers maintained sensory acceptability for more than two weeks, regardless of the by-product addition. Considering both microbiological stability and sensory properties, the shelf life of this product was calculated to be around 1 week for the control burger, 8.5 days for both burgers with fig peels and by-products from turnip greens, and 9 days for the shrimp-based burger fortified with pomegranate peels.
