Lactic Acid Bacteria

Published: 2021-06-29 06:27:53
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Category: Biographies

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Application of lactic acid bacteria
There are four major categories for the current uses and applications of LAB: food, cosmetic, pharmaceutical, and chemical applications.

In food industry
Recent years the interest increased in using LAB by using bacteriocin-like inhibitory substances (BLIS) because of their potential use as a natural antimicrobial agent to enhance the food safety of food products and increase the nutritional values of the food. Foods that fermented by LAB such as cheese, kimchi, fermented sausages, wine, yogurt and pickles have not only a greatly extended shelf life compared to the raw materials from which they are derived, but also enhance the aroma and flavor directly or indirectly by the fermenting organisms. There have many lactic acid fermentation products that have been used since long time ago such as Kimchi (korea), Yogurt (eastern Europe), Dahi (india n Nepal) and cheese (Europe n middle east).

The basic steps of cheese production are acidification, coagulation, dehydration, and salting. While acid production is the major function of the starter bacteria. LAB is responsible for the fresh acidic flavor of unripened cheese and is important in coagulation of milk casein, which is accomplished by the combined action of the enzyme rennet. During the ripening process the LAB also producing volatile flavor compounds such as diacetyl and aldehydes by releasing proteolytic and lipolytic enzymes involved in cheese ripening and by natural antibiotic substances that suppress growth of pathogens and other spoilage microorganisms.

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