The princle of microwave heating
Microwave frequency is electromagnetic waves of 300 MHz -300 GHz. The water in medium materials heated is polar molecules, under the effect of the rapid change of electromagnetic field, its polarity orientation will alter with the changes of the external electric field with the high-speed, causing the movement and friction of molecule. So that the microwave field energy can be converted to heat energy in medium to rise the temperature of materials.Then materials heated go to produce heat, puffing and a series of physical and chemical processes, and so, microwave heating achieved.
Principle of microwave machine sterilization
Microwave sterilization utilize the result of combined action of the thermal effects of and biological effects of electromagnetic fields. Microwave thermal effect on the bacteria is to make the protein of bacteria denaturedjost their nutrition, reproduction and survival conditions down to be dead. Microwave on the biological effects of the bacteria is that the microwave electric field changes cross-section of potential distribution of the bacterial cell membrane and impacts the concentration of Ion and electron around the membrane, which can change the permeability of cell membranes.therefore make bacteria innutrient not be normal
metabolism. The structure of bacterial disorders, and growth is inhibited to be dead. Moreover, nucleic acid genetic (RNA) and deoxyribose acid (DNA),which decide the normal growth and stability of bacteriahis curly-shaped macromolecule that made of a number of linked compactly hydrogen bond.The microwave can be strong enough to make hydrogen bond slack, ruptured and recombined, which induce genetics to be mutational,chromosome to be distortional or even broken.