Abstract

Introduction. Modern meat scientists are currently interested in combining meat raw materials with plant ingredients to enrich products with biologically active substances of natural origin, including antioxidants. In this regard, we studied the antioxidant capacity of a dry lingonberry marc extract introduced into meat paste and analyzed its effects on the product’s color and stability during storage.
Study objects and methods. Our objects of study were a dry lingonberry marc extract originating in the Republic of Buryatia, forcemeat, and a ready-made paste in a casing. The extract was obtained by water-alcohol extraction using microwave irradiation. We investigated the physicochemical characteristics of the dry extract, including its contents of phenolic compounds, benzoic acid, and antioxidants.
Results and discussion. During the experiment, we analyzed the extract’s effect on the paste’s total antioxidant capacity, coloring, and shelf life. The results showed that increasing the extract’s amount from 0.1% to 0.4% changed the color of the paste from gray-brown to purple-brown, respectively, due to anthocyanins. In further tests, we used a 0.2% concentration of lingonberry extract – the optimal amount that retained the usual brown color of the paste while increasing the content of antioxidant substances. Then, we analyzed the degree of fat oxidation in the paste samples made with and without sodium lactate during storage. According to the results, the lingonberry marc extract used without the acidity regulator and with it inhibited lipid oxidation by 12.7% and 20%, respectively, by neutralizing free radicals. Finally, we tested the presence of pathogenic microorganisms in the end products. We detected no E. coli bacteria in the samples and found an inhibited growth of mesophilic anaerobic and facultative anaerobic microorganisms due to the extract’s bactericidal effect established in Our earlier studies.
Conclusion. Thus, our results indicated that the dry lingonberry marc extract introduced into meat paste increased the product’s total antioxidant capacity and improved its stability during storage.

Keywords

Meat products, berry extract, lingonberry, paste, phenolic compounds, antioxidants, oxidation, peroxide value

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