Microwave ovens use of safety concern
microwave oven has given us tremendous advantages of life, but there are advantages and harm, if used improperly, microwave oven is also a certain degree of risk. So everyday, the use of microwave ovens should be noted that on?
The safety of using the microwave oven
As long as the proper use of microwave ovens, will not harm the human body. Microwave oven microwave frequency is 2450 MHz, this microwave can not penetrate the body's internal organs and tissues damage only the skin and surface tissue heat it, as long as the radiation is not sustained long, generally not hazardous to health .
Scientists found out from the microwave oven leak microwave transmission in space, its failure level and square of the distance from the microwave oven generally popular. That is, if Agency in the microwave oven door microwave oven leakage per square centimeter of 10 milliwatts, then the space at 1 meter away from the intensity of only 0.001 mW.
Moreover, the disclosure of the actual amount of microwave oven door is much lower than this value, strict requirements of international standard microwave oven leakage amount not greater than 5 milliwatts per square centimeter, some Chinese manufacturers have control of the factory technical requirements of international standards 1 / 5 of 1 milliwatt per square centimeter or less. Each microwave oven in the manufacturing process of each, are subject to stringent checks to ensure no leakage of microwaves. Microwave oven door is specially designed with multiple safety protection device, during use, the moment the door opened, microwave oven immediately stop firing, to ensure the safety of users.
The main factors affecting microwave cooking
Microwave cooking of food heating control of time learning to use the largest microwave oven, use good chef can achieve the level. Early users, if not for the control of time to master, can first try with a relatively short time, check the cooking effects, such as less mature, additional heating time to avoid over-cooking can not remedy. Other food heating time is also affected by the following factors:
Food initial temperature: the lower the initial temperature of the food itself, to be heated longer.
Food size: small pieces of food cooked faster than the bulk. Therefore, to shorten the cooking time, the best food cut into small pieces less than 5cm square, so that all aspects of microwave energy through its center.
Food shape: the shape of the same food, more even cooking. Usually sliced and diced is better.
Quantity of food: The more food, the longer the cooking time.
Food density: the depth of microwave energy through food, according to the molecular density of the internal food differ, porous high-density foods than the food more easily penetrate the microwave.
Food and water content: water molecules absorb microwave can be so high water content of food cooking is better.
Container: generally use round, shallow mouth of the container less endothermic heat the best, if the amount of food a lot, with great depth of the container, heated on the way to stir, to avoid uneven heating.
Links
1. What is a microwave?
Microwave is a very high frequency electromagnetic wave, usually 300-30000 MHz electromagnetic waves. Microwave oven is a kind of electromagnetic waves to cook food using kitchen appliances. Microwave the first to be referred to as "radar furnace" because that is the invention of microwave radar devices from inspiration, and later renamed the microwave oven.
2. Microwave characteristics
Microwave is a high-frequency electromagnetic waves, with reflection, transmission, absorption of three features.
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