What harm does working in the computer room do to your health every day?

Computer mainframe, monitor, mouse, keyboard and related equipment around will all produce radiation, which can't be seen by eyes and touched by hands. According to scientific research, the harm of low-frequency electromagnetic radiation generated by computers to human body is hidden and accumulated. People often (for a long time) use computers in the environment of ultra-strong low-frequency electromagnetic radiation emitted by computers. Causes dizziness, headache, brain swelling, tinnitus, insomnia, dry eyes, decreased vision, loss of appetite, fatigue and weakness, memory loss, alopecia in some people, leukopenia, low immunity, cataract, leukemia, brain cancer, breast cancer, vasodilation, abnormal blood pressure, chest tightness, bradycardia, decreased cardiac output, irregular sinus heart rate, decreased sperm quality in some men, and decreased pregnancy in some women. After operating a computer, people will absorb a lot of electromagnetic radiation particles on their faces, and they will often be exposed to radiation, resulting in facial rashes. If a person keeps operating the computer for five hours, the low-frequency radiation generated by the computer will do harm to the human body, which is equivalent to the loss of one day's life.

The more computers in the room and the denser they are placed, the greater the amount of low-frequency electromagnetic radiation in the air and the greater the harm to human body. The radiation intensity in the north of computer monitor (screen) is much higher than that in the front. Generally speaking, in school computer classrooms and some internet cafes, computers are placed horizontally at close range. People in the front row have their backs to the back of the computer monitor in the back row, and the front, back, left and right computers are adjacent to each other, which is more harmful. Even if a general "radiation protection net (board)" is hung on the display, only a small part of radiation from the front of the display can be blocked. Can't solve the fundamental problem. Many people mistakenly believe that as long as the "ordinary" (glass) display screen on the computer is replaced by "liquid crystal display screen", all radiation on the computer host, monitor, mouse, keyboard and peripheral related equipment can be completely eliminated. In fact, it is impossible to eliminate all the radiation from all parts of the computer, only to reduce the local radiation on the high-input "monitor", but it still cannot eliminate the problem that computer radiation on the computer mainframe, mouse, keyboard and peripheral related equipment still hurts people.

Although the electromagnetic radiation emitted by computers is not very strong, some people spend hours on computers every day, all year round. This accumulated radiation dose is quite large. What impact will it have on sensitive groups such as women and children, especially pregnant women with fetuses? What are the consequences? The above information is enough to make people worry and alert.

How does electromagnetic radiation affect human health? What is its biological mechanism? Electromagnetic radiation usually produces biological effects on the body through thermal effect, non-thermal effect and stimulation. The thermal effect is well known. The human body is a dielectric, which is polarized repeatedly under the action of high electric field, and the collision and friction between molecules produce violent motion, which converts electric energy into heat energy. There is also a dielectric solution (such as body fluid) in the body, which generates a conductive current under the action of an electric field, forming a closed loop of different degrees, generating local induced heat flow, leading to fever. The thermal effect of high frequency radiation, especially microwave radiation, is more obvious. Microwave oven, microwave therapeutic apparatus, etc. Are based on the thermal effect principle of radiant energy. Excessive heating and long-term exposure to radiation will do harm to human body, and the thermal effect of low-frequency electromagnetic radiation is not obvious. Non-thermal effects affect brain cells, weaken the activity ability of cerebral cortex cells and inhibit the conditioned reflex that has been formed. Long-term exposure may lead to nervous system dysfunction.

Experiments show that electromagnetic fields can shorten the average sleep time of normal people by 20 minutes. A study by Booth, a professor of cardiovascular medicine in Frejborg, USA, shows that mobile phone radiation increases the diastolic blood pressure of subjects by 10-20mmhg. Stanford University and North Carolina Comprehensive Experimental Systems Company studied the effects of radiation on four kinds of mobile phones and many kinds of animal cells. The results show that radiation can damage the chromosomes of animals. The influence of DNA genetic factors will lead to cell canceration. The cerebral cortex of chickens and cats will be irradiated by ultra-high frequency and ultra-high frequency electromagnetic waves modulated by low frequency, and calcium ions will be precipitated. Calcium ion is an indispensable substance for information transmission, immune system work and cell reproduction in organisms. The experiment also found that low-frequency electromagnetic waves can change the secretion of melatonin in animal pineal gland, and melatonin can inhibit tumor cells. When melatonin is reduced, it can change tissue molecules and lead to degenerative diseases.

Stimulation: When the electromagnetic wave is below 100KHz, there are two aspects of stimulation to human body. First, the human body will be shocked when it comes into contact with non-metallic objects exposed to electromagnetic fields. The lower the frequency, the greater the degree of electric shock; Second, induced current is generated in the body. When the induced current is greater than the body current (brain point, heart point, etc.). ), it will cause the excitement of cells in the nervous system and visual system. The lower the frequency, the greater the excitement. The slight stimulation makes people tingle. The greater the stimulus, it will cause muscle contraction, then pain, excitement of the heart and respiratory organs, severe ventricular fibrillation, continuous contraction of the myocardium, and finally lead to cardiac arrest and death.

To sum up, it can be summarized as follows:

(1) The low-frequency electromagnetic radiation of computers and household appliances is harmful to human body; (2) Different groups of people have different injury effects. Women, children, the elderly and the infirm are sensitive groups, especially for the fetus; (3) The damage degree is related to the cumulative radiation dose; (4) The non-thermal effect and stimulating effect of low-frequency electromagnetic radiation are the main functions. (5) It has influence on human nervous system function, immune system function, circulatory system function and life development function. (6) Molecular biology and process, cell biology and biochemical process need to be further studied in order to further explore and reveal their mechanisms of action.

How to protect computers and home computers from electromagnetic radiation? Keeping a certain distance from the radiation source is one of the effective protective measures. Because the intensity of electromagnetic radiation decreases with the square of the distance from the radiation source. It's best not to concentrate computers and household appliances in your usual room. For example, computers, televisions, refrigerators and microwave ovens should not be put in the bedroom. Experts suggest that computer users should keep a distance of not less than 70 cm from the display screen and not less than 120 cm from the sides and back of the computer.

In addition, it is also important to reduce the time spent in contact with computers. Because the cumulative dose of radiation is proportional to the product of radiation intensity and irradiation time. Therefore, it is necessary to reduce the computer time, which is difficult to do in actual operation. However, it is difficult for many people to keep a certain distance from the radiation source in their working and living environment. For example, in the computer room, the distance between the front, back, left and right can't keep the required distance. There are also some people who are not allowed to reduce the working hours of computer surfing the internet and operate it for 3-4 hours without interruption every day. In this case, the only way is to wear protective clothing and protective cap to directly reduce the body's absorption of radiation.