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【 Powerful magnet 】 Contact the magnet for long, there will be harm to the body

by:Newland     2020-05-02
People didn't invent the magnet, is a natural magnetite. Magnetized and Chinese found in nature in ancient Greece there is a natural stone, called & other; Magnet & throughout; 。 This stone can be magic little pieces of iron absorption, and at a random wobble is always point to the same direction. Early voyager the magnet as the compass of its first to identify the direction in the sea. The earliest discovery and use of magnet is supposed to be Chinese, also is to use the magnet production & other; The compass & throughout; That is one of the four great inventions of China. After one thousand years of development, the magnet has become a powerful material in our life today. Through the synthesis of different material alloy can achieve the same effect as the tool, but also can improve the magnetic force. Came in the 18th century artificial magnet, but the process of making stronger magnetic material is very slow, until the 1920 s to produce the aluminum nickel and cobalt, Alnico) 。 Then, in the 1950 s produced the ferrite ( Ferrite) , creating a rare earth magnet in the 70 s [ Rare Earth all including ndfeb ( 钕铁硼) And samarium cobalt ( SmCo) ] 。 At this point, magnetism obtained the rapid development of science and technology, strong magnetic material also makes the components more miniaturization. The earth itself has a strong magnetic field, so people itself of magnetic gutty adapt even rely on. Cut less stable magnetic field is beneficial for the body, also often used magnetic therapy in medical treatment. Electromagnetic wave is different, it is a kind of high energy wave, the frequency will have bad effect to the body. So the magnet no harm to human body. Magnet bracelet is harmless to the human body does not. With nuclear magnetic in medical equipment, high magnetic field has more than 3 t, no harm to human body. Everyone recognized as, in all medical radiology equipment, mri is the most safe. That is to say, people are not afraid of the magnetic field, the more afraid of radiation. High magnetic field does have certain negative effect to human body, but the magnet bracelet with the magnet content is limited, can't cause what effect to human body. Someone claims that the magnet provides a magnetic of physiological organization, even think that each cell has a positive and negative poles, also some people claim that the magnet can improve blood circulation. In fact, there is no evidence that the human body tissue cells or blood and magnetic field have any interaction, the iron ions in red blood cells, instead of ferromagnetism, or even reverse magnetic, not attracted by the magnetic field, it is well known hot compress can promote the blood circulation, as a result, the skin will turn red, if the magnet can promote blood circulation, why is the skin direct contact with the magnet phenomenon without red? The effect of magnetic therapy is the so-called mental ability, is not very obvious medical effect directly. Magnet bracelet by weak magnetic field lines constantly stimulate the wrist microcirculation system, magnetic field to promote blood circulation, improve human physiology, eliminate fatigue have very weak effect, indeed to sleep to have certain advantages, but is not big. Long-term wearing magnet bracelet does not have any damage to the human body. But if the magnet magnetic field strength is very strong. In general more than 3000 magnetic field strength magnets, there is a harm to human body. Below the standard of the harm of human body is negligible. Magnetic field penetration will damage the central nervous system, cardiovascular system, etc. , to the biological growth, life activities and behavior habits, etc have important influence.
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