When you face the computer, operate freely and live happily online, have you ever thought that the electromagnetic radiation it produces will be harmful to your health?
Is it bad for your health?
When you sit in front of the computer for several hours or even more than ten hours every day, what harm may the electromagnetic radiation emitted by it do to you?
After years of contact with computers, your radiation dose has been accumulating and increasing. Will it be the same as smoking? After a long time, it may be.
Suddenly there were irreparable consequences. What are the biological effects of low-frequency and low-intensity electromagnetic radiation on the body? How to prevent or mitigate electromagnetic radiation
Hurt?
Be careful of the electromagnetic radiation emitted by the computer.
Is electromagnetic radiation harmful to human body? The answer is yes. During World War II, it was found that infertility, alopecia and cataract were occupational diseases of radar soldiers. Workers engaged in radio frequency operations have many adverse effects, such as neurasthenia, impatience and irritability, alopecia and hyperhidrosis, menstrual disorder in women, sexual dysfunction, and decrease or increase in the number of white blood cells and red blood cells. Therefore, workers working in the near field should wear protective clothing made of copper wire fabric. As we all know, high-frequency and high-intensity electromagnetic radiation is harmful to human body. Does low-frequency and low-intensity electromagnetic radiation also have adverse effects on human health? For example, does the electromagnetic radiation generated by computers and home appliances harm the human body? Maybe you can't give a clear answer. The following information will help you understand this problem.
In recent years, the news media have reported the research results and investigation reports of relevant institutions and experts at home and abroad, which has attracted people's attention. According to the report of National Radiation Protection Committee, low-frequency electromagnetic waves can cause cancer, coronary artery disease, Parkinson's disease and Alzheimer's disease.
1995, 250 pregnant computer operators were investigated by Japan Computer Labor Health Investigation Committee. Among them, there were 8 cases of pregnancy poisoning/kloc-0, 35 cases of abortion and 97 cases of stillbirth, the incidence rate was 60%. According to the investigation of computer operators in Hubei Postal Savings and Remittance System, 8 people were pregnant 10, and 4 people were abnormal pregnant 6 times, with an incidence rate of 60%. Experts from well-known hospitals such as Shanghai found that two women had been exposed to computers for a long time and both gave birth to deformed children. Coincidentally, in Dalian Maternal and Child Health Hospital, four pregnant women gave birth to frog deformed children. Neither of them has any family history, and the couple are not suspected of taking drugs, but the similarity is that they are both computer users. The World Health Organization pointed out in its latest revision on computer screens and workers' health that pregnant women who use computers for more than 20 hours a week will increase their abortion rate by 80% and increase the incidence of deformed children. Experts point out that the developing fetus, especially in the first three months of pregnancy, is in the process of organ formation, and electromagnetic radiation will cause a series of serious consequences, such as embryo death, organ malformation and central nervous system damage. The incidence of vascular diseases among computer operators is 2.8 times higher than that of non-professionals
Today, the world has entered the digital and networked information age. Computer applications have penetrated into all walks of life. With the development of internet technology and the rise of e-commerce, it has entered every field of people's work, study and life, and it is everywhere. Not only factories, enterprises, shops, institutions, schools and hospitals use computers in large quantities, but computers have also entered thousands of households and become a household appliance. In particular, services such as finance, post and telecommunications, securities, insurance and traffic management are inseparable from computers. Hundreds of millions of people use computers, and the era of long-term contact with computers has arrived. Does computer radiation affect human health? It has always been a matter of great concern to users.
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) Low-frequency electromagnetic radiation from 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 an office with multiple computers, the required distance cannot be maintained. 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.
How to prevent computer radiation
When using a computer, it is best to equip the monitor with a good quality radiation screen. Pay attention to eat carrots, bean sprouts, tomatoes, lean meat, animal liver and other foods rich in vitamins A, C and protein, and often drink some green tea.
For busy people, the easiest way to resist computer radiation is to drink 2-3 cups of green tea and eat an orange every morning. Tea is rich in provitamin A, which can be quickly converted into vitamin A after being absorbed by human body. Vitamin A can not only synthesize rhodopsin, but also make eyes see things more clearly in dark light. Therefore, green tea can not only eliminate the harm of computer radiation, but also protect and improve vision. If you are not used to drinking green tea, chrysanthemum tea can also play a role in resisting computer radiation and regulating body functions.
Computer radiation is inevitable, but it can be reduced. First of all, you should try to buy a new computer, and generally don't use an old one. The radiation of old computers is generally severe, which is generally 1-2 times that of new computers at the same distance and similar models. When operating a computer, it is best to install a computer-specific color filter on the display screen to reduce the harm of radiation, and do not place miscellaneous metal objects indoors to avoid electromagnetic waves from being emitted again. When using a computer, you need to adjust the brightness of the screen. Generally speaking, the brighter the screen, the stronger the electromagnetic radiation, and vice versa. But it can't be too dark, so as not to affect the effect because of low brightness, which is easy to cause eye fatigue. Also pay attention to keeping a proper distance from the screen. The closer you are to the screen, the greater the electromagnetic radiation the human body receives, so it is best to stay half a meter away from the screen.
After the computer is used, many particles of electromagnetic radiation will be adsorbed on the face. Washing your face with clean water in time will reduce radiation exposure by more than 70%.
Cactus can attack bad people, and there is another advantage! It is said that putting a cactus in front of the computer desk can help reduce radiation.
People who often use computers will feel uncomfortable with their eyes, their eyesight will drop, and they will get tired easily. People who often use computers should pay attention to the following aspects in their diet:
Eat some foods that are good for eyes, such as eggs, fish, cod liver oil, carrots, spinach, sweet potatoes, pumpkins, medlar, chrysanthemums, sesame seeds, radishes and animal livers.
Eat more foods with high calcium content, such as bean products, bone soup, eggs, milk, lean meat and shrimp.
Pay attention to vitamin supplementation: eat more fresh fruits and vegetables containing vitamins.
Pay attention to enhancing resistance: eat more foods that enhance the body's disease resistance, such as mushrooms, honey, fungus, kelp, citrus, jujube and so on.
Eat some radiation-resistant food: although computers have little impact on human health, they should be prevented. Drinking tea can reduce the harm of radiation, and lipopolysaccharide in tea has anti-radiation effect. Spirulina and sea buckthorn oil also have anti-radiation effects.
In addition, wash your face after using the computer and pay attention to exercise at ordinary times.
The location of the computer is very important. Try not to let the back of the screen face people, because the back of the computer has the strongest radiation, followed by the left and right sides, and the front of the screen has the weakest radiation. As long as you can see clearly, the distance should be at least 50 cm to 75 cm, which can reduce the harm of electromagnetic radiation.
Pay attention to indoor ventilation: scientific research has confirmed that computer screens will produce a carcinogen called dibenzofuran bromide. Therefore, it is best to install a ventilator in the room where the computer is placed. If not, pay special attention to ventilation when surfing the internet.