Electromagnetic radiation is a composite of electromagnetic waves that transmit energy in mutually perpendicular electric and magnetic fields over time. Human life activities include a series of bioelectrical activities, these bioelectrical is very sensitive to the environment of electromagnetic waves, therefore, electromagnetic radiation can cause effects and damage to the human body.
Professor Gao Ersheng pointed out in his book "The effect of air-conditioning on semen quality" that the harm of electromagnetic radiation on the human body is manifested in two major aspects: thermal and non-thermal effects.
Thermal effect
More than 70% of the human body is water, water molecules by electromagnetic radiation friction with each other, causing the body to warm up, thus affecting the normal work of the body organs. Elevated body temperature triggers a variety of symptoms, such as palpitations, head swelling, insomnia, bradycardia, white blood cell reduction, decreased immune function, vision loss. The power density of the electromagnetic wave that produces thermal effect is 10MW/CM?; the microscopic thermogenic effect is 1 MW - MW/CM?; the shallow thermogenic effect is below 10MW/CM?. When a microwave with a power of 1000 W directly irradiates a person, it can cause death within a few seconds.
Non-thermal effect
The organs and tissues of the human body are weak electromagnetic field, they are stable and orderly, once the interference of the external electromagnetic field, in a state of equilibrium of the weak electromagnetic field will be destroyed, the human body will also suffer damage. This is mainly a low-frequency electromagnetic wave impact, that is, the human body was irradiated by electromagnetic radiation, body temperature did not rise significantly, but has interfered with the body's intrinsic weak electromagnetic field, so that the blood, lymph fluid and cell protoplasm changes, causing serious harm to the human body, which can lead to fetal deformities or pregnant women miscarriage; affecting the human body's circulatory, immune, reproductive and metabolic functions, and so on.
Non-thermal effects on the human body is reflected in the following aspects:
Nervous system: the human body repeatedly subjected to electromagnetic radiation, the central nervous system and other aspects of the function of changes. Such as conditioned reflex activity is inhibited, bradycardia and so on.
Sensory system: low-intensity electromagnetic radiation, can make a person's sense of smell function decline, when the human head by low-frequency low-power acoustic pulse irradiation, will make a person hear like a machine ringing, insects or birds chirping sound.
Immune system: China has a preliminary observation, long-term exposure to low-intensity microwave people and normal people of the same age, compared to its body fluids and cellular immunity indicators in the immunoglobulin 1gG decreased, T cell wreaths and lymphocyte conversion rate of the product of the reduction, so that the body's ability to decline in the body fluids and cellular immunity.
Endocrine system: Low-intensity microwave radiation can cause thalamus-pituitary-adrenal dysfunction; CRT, ACTH activity increases, endocrine function is significantly affected.
Genetic effects: microwaves can damage chromosomes. Animal experiments have found; 195MHz, 2.45GHz and 96Hz microwave irradiation rats, will be in 4-12% of the spermatogonial bone formed chromosome defects, rats can inherit this chromosome defects can be caused by mental retardation, shortening of the average life expectancy of the injured.
Cumulative effect
Thermal and non-thermal effects on the human body, the damage to the human body has not yet had time to repair itself (usually referred to as the human body's tolerance - internal resistance), and then again subjected to electromagnetic radiation, the degree of damage will occur cumulatively, and in the long term, will become a permanent disease, endangering life. For those who have been exposed to electromagnetic radiation for a long period of time, even if the power is very low and the frequency is very low, it may induce unexpected lesions, so it is important to be vigilant. Preventive measures in addition to away from the source of radiation, but also should actively supplement antioxidants such as vitamin C, vitamin E, beta-carotene, lycopene, grapeseed, astaxanthin and other content of food.