There is no radiation on the mouse, keyboard and LCD screen. The radiation of rear projection color TV is low.
When the mobile phone is in standby, the radiation is small, and it is bigger when talking, but the radiation is the largest when the mobile phone number is dialed but not connected, and the radiation amount is about three times that of standby. Children's daily household appliances mainly have excessive power frequency magnetic field radiation, mainly manifested in hair dryers, vacuum cleaners, electric razors, fluorescent lamps, microwave ovens and so on. Moreover, in many cases, several electrical appliances may be used at the same time, and the magnetic field intensity between them is also cumulative during use. In some informal experiments, many people found the phenomenon of group radiation. "Group radiation will make the radiation frequency band very wide, which will increase the resonance between devices and the superposition of radiation energy. When the energy reaches a certain level, the human body will be affected by thermal effect (the higher the frequency, the more intense it will be), non-thermal effect (full frequency band) and resonance effect (when the wavelength is proportional to the scale of the organism). " If the long-term exposure exceeds the safe radiation dose, it will kill (even kill) human cells in a large area. Electromagnetic waves will also affect and destroy the original current and magnetic field of human body, so that the original electromagnetism of human body will change. This will interfere with the human body's ecological clock, leading to the disorder of ecological balance and autonomic nervous function, such as headache, fatigue, fatigue, excitement, memory loss, inattention, skin fever, hair loss, palpitation, arrhythmia, blood pressure disorder and so on.
Guard against electromagnetic radiation
Don't use all household appliances together.
If there is an application manual, please keep a safe operating distance according to the manual.
In any case, try to avoid long-term operation.
Keep the indoor air circulating.
When the appliance is not in use, it is best to turn off the power supply and don't let it stand by.
In the long run, this will not only save electricity, but also reduce trace radiation.
Accumulate.
One of the most effective preventive measures is to buy some protective equipment, which is necessary for housewives, pregnant women and people who operate computers for a long time.
Protective clothing: including coats, vests, aprons and maternity clothes. Made of special fiber, it has good anti-electromagnetic radiation and anti-static effect. Especially for families with microwave ovens, it is best to equip them with protective aprons, which can effectively prevent electromagnetic radiation. For pregnant women, if they come into contact with electrical equipment, they must wear protective Chinese-style chest covering or protective clothing to ensure the healthy growth of the fetus.
Radiation shielding: it has many functions such as radiation protection, anti-static, anti-glare and so on, and it also plays a certain role in protecting eyesight.
Another way is to pay attention to time and distance.
The degree of injury is proportional to time, that is to say, the longer the exposure to electromagnetic radiation, the greater the injury. Is inversely proportional to the distance, the distance is ten times larger, the radiation is one percent of the original, the distance is one hundred times larger, and the radiation is one ten thousandth.
Specific household electrical equipment protection is divided into:
First, the microwave oven
Vigilance index: ★★★★★★★
Microwave ovens use the thermal effects of microwaves to heat and cook food. Studies have shown that the strong electromagnetic waves generated by microwave ovens may cause diseases if they exceed the standard seriously.
Coping methods:
1. It is best to leave about one meter after the microwave oven is turned on.
2, often use the microwave oven to cook food, you can wear a shielded apron and a shielded jacket.
3. It is best to replace the microwave oven after 6 to 7 years of use.
Second, computers.
Warning index: ★★★★
Coping methods:
1. If you have to use the computer for a long time, you should pay attention to washing your face in time.
2. When using the computer, you should keep the correct posture, and the distance between people and the computer screen should be kept above 70CM.
3. The electromagnetic radiation intensity on the back and side of the computer is not less than the screen, and should be kept above 120CM.
4. Liquid crystal is less harmful to human body.
Third, TV sets.
Early warning index: ★
Coping methods:
1, TV sets should not be too concentrated with other electrical appliances, exposing themselves to the danger of excessive radiation.
2. The distance between TV and people should be at least 2 meters away and not too close to the screen.
It is best not to put TV and other electrical appliances in the bedroom.
In addition, it should be noted that reading books and newspapers in bed is a kind of life interest for many people. However, small household appliances such as radio, walkman and mobile phone are not suitable for bedside to avoid electromagnetic radiation.
Finally, if you are in the electromagnetic radiation source for a long time and feel unwell, you should find relevant departments for monitoring and testing as soon as possible to find out the radiation source. Avoid long-term injuries.
How to minimize the harm of computer radiation to human body, I think we should do the following:
1. Avoid operating the computer continuously for a long time and pay attention to rest. To maintain a most suitable posture, the distance between the eyes and the screen should be 40~50 cm, so that the eyes can look down or slightly down at the screen.
2. Maintain a good indoor working environment, such as comfortable temperature, clean air, proper negative ion concentration and ozone concentration.
3. The light in the computer room should be suitable, neither too bright nor too dark, so as to avoid the interference of light caused by direct irradiation on the fluorescent screen. The studio should be kept ventilated and dry.
4. Color filters should be used on the computer screen to reduce visual fatigue. It is best to use glass or high-quality plastic filters.
5. Install protective devices to reduce the intensity of electromagnetic radiation.
6. Pay attention to keep your skin clean. There is a lot of static electricity on the surface of computer screen, and the accumulated dust can be transferred to the exposed parts of face and hand skin for a long time, which is prone to macula and pigmentation, and even cause skin lesions in severe cases.
7. Pay attention to supplementary nutrition. Computer operators working in front of the screen for too long will consume rhodopsin on the retina, which is mainly synthesized by vitamin A. Therefore, computer operators should eat more foods such as carrots, Chinese cabbage, bean sprouts, tofu, red dates, oranges, milk, eggs, animal livers and lean meat to supplement vitamin A and protein in the human body. Drink more tea, tea polyphenols and other active substances in tea can help absorb and resist radioactive substances.
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Uncover the X-files of computer radiation
As the saying goes, there is no shortage of gold. As a modern high-tech product and electrical equipment, computer brings more convenience, efficiency and joy to people's lives, but there are also some unfavorable factors that are harmful to human health.
Judging from the types of radiation, the hidden dangers of computers to human health mainly include electromagnetic radiation (various electromagnetic rays, electromagnetic waves, etc.). ), sound (noise), light (ultraviolet, infrared radiation and visible light, etc. ) and other radiation "pollution".
From the perspective of radiation sources, it includes CRT display radiation sources, chassis radiation sources and peripheral equipment radiation sources such as speakers, printers and photocopiers. Among them, the imaging principle of CRT (cathode ray tube) display determines that it is difficult to completely eliminate harmful radiation during its use. Because when it is working, its internal high-frequency electron gun, deflection coil, high-voltage bag and peripheral circuits will produce a variety of rays and electromagnetic waves, such as ionizing radiation (low-energy X-rays), non-ionizing radiation (low-frequency and high-frequency radiation), electrostatic field and optical radiation (including ultraviolet radiation, infrared radiation and visible light, etc.). ). The liquid crystal display uses the physical characteristics of liquid crystal, and its working principle is completely different from that of CRT display. It is a "healthy" display with no radiation (negligible) and environmental protection. Various components inside the chassis, including high-frequency and high-power CPU, various boards with a large number of transistors integrated in the main chip, CD-ROM drive, floppy drive, hard disk, several cooling fans inside the power supply, transformers, etc. When working, it will emit radiation and noise interference such as low-frequency electromagnetic waves. In addition, external speakers, photocopiers and other peripheral equipment radiation sources are also a "source" that cannot be ignored.
Judging from the degree of harm, electromagnetic radiation is undoubtedly the most harmful. Research by medical experts at home and abroad shows that long-term and excessive electromagnetic radiation will directly harm human reproductive system, nervous system and immune system, and it is the main inducement of cardiovascular disease, diabetes and cancer mutation, the inducement of abortion, infertility and teratogenesis of pregnant women, and it can directly affect the development of body tissues and bones of minors, leading to the decline of vision, memory and liver hematopoietic function, and even lead to retinal detachment in severe cases. In addition, electromagnetic radiation also brings hidden dangers to information security, which can be received and decoded by special signal receiving equipment, leading to information leakage and unnecessary losses. Excessive electromagnetic radiation will also interfere with other electronic devices around, affecting their normal work, resulting in electromagnetic compatibility (EMC) problems.
Therefore, electromagnetic radiation has been listed by the World Health Organization as the fourth largest environmental pollution source after water, atmosphere and noise, and has become an invisible "killer" that harms human health. Therefore, electromagnetic radiation protection is imperative.
protect
Spear and shield of health countermeasures
As the saying goes, the Tao is one foot high and the magic is ten feet high. In view of the harmfulness of computer electromagnetic radiation, relevant professional organizations and computer manufacturers at home and abroad have started the work of protecting computer radiation very early. After years of efforts, aiming at the production and manufacture of electronic products such as computers, we have formulated a number of strict certification standards such as MPR, TCO, FCC and UL from the aspects of radiation, energy saving, environmental protection and ergonomics to ensure that human health will not be harmed. At the same time, the so-called "green computer" with energy saving, environmental protection and no radiation has appeared in recent years.
At present, active protection and passive protection can be taken against the harm of computer electromagnetic radiation. Passive protection method, that is, in addition to improving the working environment and paying attention to the use method, measures such as providing radiation protection clothing, radiation protection screen, radiation protection curtain and radiation protection glass are taken. For people who often touch and operate computers, to reduce or eliminate the harm of electromagnetic radiation; The active protection method starts with the "source" of computer electromagnetic radiation, such as monitors and cabinets, and eliminates or shields it.
First, purchase, that is, choose and buy products that meet the "green computer" standard from powerful manufacturers in the market; The second is DIY, that is, buying "green" computer accessories that have passed various certification standards to build your own healthy computer. Below we will focus on how to choose accessories that meet the radiation protection standards to DIY healthy computers.
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 viewing effect because the brightness is too small, which is easy to cause eye fatigue.
When operating the computer, pay attention to keep 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 be 0.5M away from the screen.
In addition, after operating the computer, many particles of electromagnetic radiation will be absorbed into the face. Washing your face with clean water in time will reduce radiation exposure by more than 70%.
The other is drinking tea.
83% people who use computers often feel tired eyes, and 64% people often feel sore shoulders and low back pain. In addition, many people will have tears, loss of appetite, sore throat, cough, chest tightness and other symptoms, and even slow movement and memory loss.
Computer radiation not only harms people's health, but also affects the quality and efficiency of work. 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.
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.
Nursing: The most obvious part of facial aging is the eyes, so eye care is particularly important.
Eye cream: It has moisturizing effect, besides reducing the problems of dark circles and bags under eyes, it also has the effect of improving wrinkles and fine lines.
Eye gel: the effect is similar to that of eye cream, but the gel-like texture is more refreshing, and there is no burden to use the skin during the day. Most of them are to eliminate eye bags and dark circles and relieve eye skin symptoms.