Relevance of application of irradiated starter cultures  to production of fermented milk products

A. A. Baranova,I. S. Selezneva,D. A. Zhuravleva,A. V. Kazakov

doi:10.15826/chimtech.2020.7.4.19

Abstract

Nowadays yogurt, fermented milk products, enriched with biologically active substances, acquire increasingly important significance in people's diets. The traditional method for producing fermented milk products and yogurt is to ferment the milk using starter cultures. The purpose of this research was to figure out if it is possible to use suspensions of probiotic microbial cultures irradiated with ionizing radiation to produce yoghurt products. Liquid live suspensions of bifidobacteria and lactobacilli, as well as a mixture of bifidobacteria, lactobacilli, propionibacteria and lactic acid streptococci were taken as a research model. The goal was achieved by receiving the yoghurt products enriched with active secondary metabolites due to using the suspensions of lysed cells of different microorganisms. We studied physico-chemical and organoleptic properties of the received products after 1, 7 and 14 days of storage.

Highlights

It is generally accepted to use probiotics to produce a variety of dietary supplements, fermented food products and drinks, and medicaments
Few people realize that production strains of bifidobacteria, lactobacilli, propionibacteria and other probiotic microorganisms are selected from specific donors, such as astronauts, or from some environmental objects
It should be noted that during the performed research live cell probiotic cultures of the microorganisms were irradiated by different doses at the linear electron accelerator

Summary

Introduction

It is generally accepted to use probiotics to produce a variety of dietary supplements, fermented food products and drinks, and medicaments. It is enough to mention that almost all fermented milk products are obtained using lactic acid and probiotic microorganisms. Few people realize that production strains of bifidobacteria, lactobacilli, propionibacteria and other probiotic microorganisms are selected from specific donors, such as astronauts, or from some environmental objects. It means that biomaterial, which represents just a part and is endowed with specific individual properties, applies to the entire community of animal and human populations without any restrictions or control. After all, it is known that there is a huge variety of races and strains of probiotic microorganisms, and every human or animal has got its unique microbial “landscape” and it is not really a correct measure to artificially plant someone else’s heterogeneous microflora [3]

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Conclusion