Fresh keeping mechanism of the hottest microwave s

2022-08-08
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Preservation mechanism of microwave sterilization

why does microwave sterilization have such a magical effect? Understand the mechanism of microwave sterilization, and you will understand that microwave refers to the electromagnetic wave with the frequency of 300 MHz to 300 GHz. Under the action of microwave electromagnetic field, the polar molecules in the medium change from the original thermal motion state to the arrangement orientation following the alternation of microwave electromagnetic field. For example, if the microwave frequency used is 2450 MHz, there will be 2.45 billion alternations per second, resulting in intense friction and heat generation. In this microscopic process, microwave energy is converted into heat energy in the medium, which makes the medium temperature rise macroscopically

microwave has thermal and non thermal effects 5 Mechanical and electrical model yd100l 0.85/1.5kw rev/min dual bactericidal effect. The brief description of the sterilization mechanism of microwave thermal effect is that biological cells are a condensed medium composed of complex compounds such as water, protein, nucleic acid, carbohydrate, fat and organic compounds. The temperature of the medium rises under the action of strong microwave field. Its spatial structure changes or destroys, and the protein denatures, which affects its solubility, viscosity, expansibility and stability, thus losing its biological activity. The brief description of the sterilization mechanism of microwave non thermal effect is: microwave action can change the biological arrangement and polymerization state and its movement law, and the ion flow induced by microwave field will affect the electricity near the cell membrane. At the same time, V, Nb, Ti and other alloys can be added to the steel as needed to improve the intensity charge distribution, resulting in damage to the barrier effect of the membrane, affecting the function of Na-K pump and membrane dysfunction, Thus, it interferes with or destroys the normal metabolic function of cells, resulting in inhibition, cessation or death of bacterial growth. Moreover, ribonucleic acid (RNA) and deoxyribonucleic acid (DNA) in cells can lead to relaxation, breakage or recombination of hydrogen bonds under the action of microwave field force. Induce gene mutation or chromosome aberration, thus affecting its biological activity, and carry out load calculation and load change, delaying or interrupting the stable inheritance and proliferation of cells

simply speaking, microwave sterilization and preservation are the result of the combined action of microwave thermal effect and non thermal effect. The thermal effect of microwave mainly plays the role of rapid temperature rise and sterilization; The non thermal effect uses the variation of proteins and physiologically active substances in microorganisms to lose vitality or die. Therefore, the microwave sterilization temperature is lower than that of the conventional method. Generally, the sterilization temperature of the conventional method is more than 100 degrees, and the time is more than ten minutes to dozens of minutes, while the microwave sterilization temperature is only 70 to 90 degrees, and the time is about a few minutes

reprinted from: China microwave

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