First, the advantages and disadvantages of microwave ovens
Advantages:
1, high nutrient retention
Microwave cooking can keep more vitamins. Because microwave cooking has higher efficiency, shorter time and less water consumption, the loss of various vitamins is lower than that of frying cooking and far lower than that of boiling.
2, can quickly thaw food
Some quick-frozen or frozen foods must be thawed before eating. We only need to heat it in the microwave for three minutes to thaw it. In addition, for some crystallized honey, we can take a similar approach, put the honey jar in the microwave oven and heat it slightly to restore the liquid state.
Disadvantages:
1, which may produce carcinogens.
Previous studies have shown that meat treated by microwave will produce carcinogens; Amino acids in milk, fruits and grains will also be converted into carcinogens after microwave; Plant alkaloids in vegetables can also be converted into carcinogens by microwave, which is harmful to our health; The loss of food nutrition is serious.
2. Plastic containers cannot be heated.
Maybe you are used to throwing packaged food and plastic lunch boxes into the microwave oven for heating, which is absolutely impossible. Because plastic containers will deform during heating, releasing toxic substances to pollute food, which will cause cancer in the long run.
Second, what is the principle of microwave oven?
1, microwave is a kind of electromagnetic wave. The energy of this electromagnetic wave is not only much larger than that of ordinary radio waves, but this invisible microwave can penetrate the food to a depth of 5cm, and make the water molecules in the food move with it. The violent movement produces a lot of heat energy, so the food is cooked. This is the principle of microwave heating.
2. In the process of microwave heating, the microwave will reflect when it touches the metal, and the metal can't absorb or conduct it at all; Microwave can pass through insulating materials such as glass, ceramics and plastics, but it will not consume energy. For food containing moisture, microwave can't penetrate, but its energy will be absorbed, and when cooking food with ordinary stoves, heat always gradually enters the food from the outside. When cooking in a microwave oven, the heat directly enters the food, so the cooking speed is 4 to 10 times faster than other stoves, and the thermal efficiency is as high as 80%.
After the above introduction, do you all know the principle of microwave oven? Microwave ovens have advantages and disadvantages. You can buy according to your actual situation and choose products with high cost performance.