Magnetic field is the interaction phenomenon between magnets produced by moving charges or changing electric fields. The basic characteristic of a magnetic field is that it can exert a force on moving charges in an object, and a changing magnetic field propagates in space in the form of waves. The magnetic field is also one of the earliest physical phenomena recognized by people. For example, the discovery of the compass can be said to be a symbol of ancient civilization. In modern society, the increasing number of household appliances, telephones, radios, mobile phones, motors and transformers, etc., make people's daily life related to magnetic field phenomena.
People can use a compass to identify the existence of the invisible and intangible earth's magnetic field. People can also understand the role of gravity from the phenomenon of objects falling. Countless radio waves of different frequencies spread in our living space, and people can listen and watch them using radios, wireless phones, and televisions. Some people say that the magnetic field, like sunlight, water and air, is the basis for the survival of the earth, because life is born, exists and develops on the gravity of the earth, and living things have multiplied in the natural magnetic field environment to this day. However, in recent years, whether the increasing number of various magnetic fields in our living environment affects the ecological environment, poses a hazard to human health, and causes new lifestyle diseases has become a topic of concern.
I remember that in 1979, American scholars Wertheimer and others found that the incidence of leukemia in children living near high-voltage distribution lines was significantly higher than that in other areas (Am J Epidemiol., 109: 273-284, 1979). We began to explore the health effects of power frequency electric fields and power frequency magnetic fields during operation of power transmission and transformation facilities. The research results of Ahlbom et al. suggest that the incidence of leukemia living in a gt;/= 0.4 microT power frequency magnetic field environment is 2 times higher than that in other areas (Br J Cancer, 83: 692-698.2000), but Greenland et al. believe that the above results Caution should be used (Epidemiology, 11: 624-634.2000).
Of course, the impact of magnetic fields on human health is not only reflected in its carcinogenic effects. People know that the earth's magnetic field can affect the magnetic field alignment of biomolecules such as collagen and fibrin. AC magnetic fields can also affect the level of cell membrane ion channels and intracellular messenger conduction. When people studied the interaction between magnetic fields, chemicals and radiation, they found that AC magnetic fields can reduce the effect of certain anesthetic drugs and enhance the damage of mitomycin to DNA (J Radiat Res., 46: 257-264.2005). Since magnetic fields can cause certain biological effects when acting on the human body, some people also use magnetic fields to treat or improve the symptoms of certain diseases. However, its related mechanism of action lacks a sufficient research basis and is still difficult to be understood, and some of its effects need to be confirmed and further explored.
Thinking of the harm of low-frequency magnetic fields in Internet cafes to the eyes and nervous system, people realize that various man-made magnetic fields have a complex impact on human health. However, since it is difficult to rule out individual living habits in epidemiological surveys, especially the effects of sunlight hours and the interaction between various radiation and magnetic fields in the living environment, it is difficult to draw definite conclusions. Although, research so far has not fully confirmed the harm of magnetic fields to human health. However, in order to protect the living environment, the national environmental protection department has set appropriate management standards for power frequency electric fields and power frequency magnetic fields.
To quote an old saying, our body contains a large number of electrolyte ions with magnetic conductivity, so it is also susceptible to the action of external magnetic fields, causing the body's cries and biological induction including positive and negative aspects...
I heard that residential Feng Shui is a science that evaluates whether the magnetic feeling between the living environment and the residents is compatible. I think a harmonious magnetic field will make people feel physically and mentally healthy, quiet and comfortable. In fact, I seem to have some somatosensory symptoms myself. I like to live in a north-south room and am used to sleeping in an east-west direction. I often find it difficult to fall asleep when I change positions occasionally.
Of course, there is also a magnetic field between men and women of the opposite sex. I remember that when I was young, I had a history of being nervous when meeting people. In other words, the sexual magnetic field may be a manifestation of the charm of the opposite sex.
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In ancient times, our lives originated in the magnetic field of nature. Today, we live among an increasing variety of natural and man-made magnetic fields. I think studying the impact of magnetic fields on health should become a social issue that cannot be ignored.