Читать книгу Thermal Food Engineering Operations - NITIN KUMAR - Страница 45

Elevated pressure when applied to the microbes results in altering the genes, metabolisms, and morphology of the cell. It is known that microorganisms adapt easily to the environment using various methods. They utilize diverse protection processes by activating the expression of the genes, staying in the dormant state, and producing the resistant mutant. There are different ways microorganisms adapt to the adverse condition, such as they create spores which hardly changes its morphology during application of pressure. As mentioned above, the resistance power to pressure in the stationary phase higher as compared to the exponential phase [44]. As the structure of the cell does not change in the stationary phase due to the protection of the membrane, the tolerance stress level gets elevated [45]. Listeria innocua endured in replicated milk with supplementary magnesium, calcium, citrate, and phosphate [27]. Magnesium has the stabilizing agent for ribosomes and calcium aids in maintaining the outer wall of the membrane of the cell. Sucrose guards bacteria by stratifying the functionality of membrane proteins [46].