Resend: "People who face the computer 4-6 hours a day will see it"

"People who face computers for 4-6 hours a day must watch it ."

2012-03-03 10:14:44

Author: Albert t_jiao Yaoji
Http://www.guokr.com/article/103727? Replypage = 2 # comments

A topic titled computer radiation-which is mandatory for 4-6 hours a day on a computerArticleIt has been circulating on the Internet for a long time. When the cidao and anti-radiation servers are still popular in the market, we will turn over the old accounts and smash them in batches:

Rumor 1: remember to turn off the computer when you go to bed at noon, because simply turning off the screen won't eliminate the radiation, and we all go to bed and head directly to the computer, one day it's too late to get Alzheimer's disease or brain tumor! Radiation is really terrible !! Be careful ~ Health is more important than everything!

Truth: it is true that only the screen is turned off without the computer being turned off, because the components in the computer chassis also produce radiation. However, there is no definite evidence that the frequency and size of electromagnetic radiation produced by computer components are related to the incidence of Alzheimer's disease and brain tumors.

--------------------------------------------------------------------------------

 

Rumor 2: The computer killer-thoracic exit. If you sit in front of a computer desk, is it true that you have been sitting for several hours and are not correctly seated? Now let's take a quiz. Show your head to the left and bend your head 45 degrees down, does your neck, neck, and shoulders feel bad? If you have the above symptoms, you should be careful, because you are likely to be the victim of the "thoracic exit syndrome" of modern computer civilization.

Truth: thoracic export syndrome is a rare disease mainly caused by congenital anatomical abnormalities (such as extra neck ribs ), in addition, people with long neck and collapsed shoulders are more likely to suffer from this disease. Although a poor posture is also related to the disease, for example, a longer-and-longer-year bending may aggravate the symptoms, it is not necessarily related to the use of computers. Even if you don't need a computer, it will still cause pain if you have bad habits. Therefore, it is important to maintain a good posture, rather than shirking responsibility to the computer.

In addition, whether it is thoracic export syndrome or not, be sure to maintain a good posture when using computers. Do not bend over your back or sit in front of your computer for too long; if you have discomfort such as shoulder, neck, elbow, hand numbness, pain, and weakness, consult a professional clinician and do not diagnose the problem by yourself, or try some unverified remedies, physiotherapy, or other treatments. As mentioned in rumors, quizzes have little value for diagnosing the disease (either on the left or right side of the disease, it is useless to turn the neck to the left side ~).

--------------------------------------------------------------------------------

 

Rumor 3: The killer was originally a "computer ". You may wonder why computers often suffer from backache, weak physical resistance, and inability to concentrate. You can never imagine the cause is "computer ", the radiation waves emitted by computers are often ignored by people. According to the international regulations on the protection against radiation by the flat ⅱ, it is necessary to be within a distance of 50cm? 25 V/m radiation exposure, but do you know what the computer's radiation is? Let me tell you -- I, keyboard 1000 V/m; II, mouse 450 V/m; III, screen 218 V/m; IV, host 170 V/m; V, notebook2500v/m.

Truth: The mprii standard does exist. It is an electromagnetic radiation standard provided by the Swedish technology Accreditation Board for computer monitors, but it is not applicable to other computer components. The limit on the radiation exposure of 25 V/m also exists (at a location of 50cm, rather than less than 50cm; at a lower frequency of 5Hz to Hz only ). This value is a strictly restricted value based on the existing research on electromagnetic radiation and health. If the computer screen radiation is within the standard, the safety is reassuring, even if the radiation is close to or slightly exceeds the standard, it does not mean obvious harm to the human body, but there may be some possibility of minor harm, such security standards can be said to be formulated for the purpose of "just in case.

As for the keyboard, mouse, and other computer components, the results are completely unreliable. According to a measurement test conducted by the Chinese Emy of metrology, the actual radiation values of these computer components are mostly less than 1 V/m, there is only 6 V/m from the 5cm position on the laptop screen, which is far from so exaggerated. The electric field intensity of 2500 V/m is close to the high-voltage line, and will not appear in daily household appliances.

--------------------------------------------------------------------------------

 

Anti-computer radiation first: put a few cuts next to the computer, it can effectively absorb radiation;

Truth: A computer is there, and the intensity of electromagnetic radiation or electromagnetic waves emitted in all directions is mainly determined by the computer itself, and the cactus cannot be shielded or adsorbed. The most important thing is that the computer's electromagnetic radiation level does not cause health hazards and there is no need to shield the computer. For more details, see "Wash your face + cactus, anti-computer radiation?"

--------------------------------------------------------------------------------

 

Tip 2: For busy people, the easiest way to resist computer radiation is to drink 2 to 3 cups of green tea and eat an orange every morning. Tea is rich in vitamin A, which can be quickly converted to vitamin A after being absorbed by the human body. Vitamin A can not only be combined with the violet color, but also make the eyes see things more clearly in the dark. Therefore, green tea can not only eliminate the harm of computer radiation, but also protect and improve eyesight. If you are not used to drinking green tea, chrysanthemum tea can also resist computer radiation and regulate the body function, and spirulina and sea-shaped oil also have anti-radiation effect;

Truth: first, there is no evidence that the radiation released by the computer has adverse effects on health, so there is no need for special protection.

Green tea is indeed rich in beta-carotene (a precursor to vitamin A), but Carotene is a fat-soluble substance, and the tea soup has a small amount of dissolution. Therefore, green tea is not the best source to supplement vitamin, generally, normal people can have enough vitamin A or beta carotene in their daily diet. Vitamin A deficiency can cause night blindness, but supplementation of beta-carotene does not offer special benefits, whereas excessive vitamin A intake may lead to poisoning. In short, the key to a healthy diet is a balanced diet. A large amount of single food intake in the short term has no special benefits for health. The anti-radiation effects of chrysanthemum tea, spirulina, and seabuckthorn oil are also nonsense.

--------------------------------------------------------------------------------

 

Third trick: Do skin care isolation before going online, such as using Pearl film, the unique "Pearl green film" forms a layer of 001mm Pearl film on the skin, which can effectively prevent environmental pollution and radiation; second, after the computer is used, the face will absorb a lot of electromagnetic radiation particles, You need to wash your face with water in time, this will reduce the radiation by more than 70%!

Truth: computer electromagnetic radiation mainly comes from various circuits in the computer and does not produce things similar to radioactive small particles. Sitting in front of the computer, turn on the computer, and the body will begin to receive electromagnetic radiation. After the computer is shut down, the electromagnetic radiation will immediately stop and there will be no "residual particles" on the face ", there is no need to wash it out. Traditional CRT monitors absorb some dust due to static electricity, but the dust itself will not produce electromagnetic radiation, and will not cause radiation damage to the face.

In short, it is necessary to clean your face, but it has nothing to do with anti-radiation.

--------------------------------------------------------------------------------

 

The fourth trick: when operating the computer, it is best to install a computer-specific color filter on the display screen to reduce radiation hazards, do not place idle metal items in the room, so as to avoid the formation of electromagnetic waves re-launch. When using a computer, adjust the screen brightness. Generally, the larger the screen brightness, the stronger the electromagnetic radiation, and the smaller the vice versa. However, it cannot be too dark to affect the effect because the brightness is too small and may cause eye fatigue.

Truth: The color filter can only filter out a portion of visible light. The computer radiation we refer to is generally radio waves, RF electromagnetic bands, and the color filter won't work. Metal objects placed around them may have a certain impact on the electromagnetic field distribution, but they are often minimal. As for the brightness of the screen, it is not closely related to the total size of the computer radiation, because each part of the computer will produce radiation, and only a part of the screen will produce radiation. CPU and other components in the chassis are the main sources of radiation.

--------------------------------------------------------------------------------

 

Fifth, you should try to purchase new computers. Generally, do not use old computers. The radiation of old computers is generally very powerful. In the same distance and similar models, it is generally 1-2 times that of new computers.

Truth: How do you look like selling a computer. The difference between the new and old computers is mainly in terms of performance. The radiation level may indeed be different, but there is no basis for saying "the radiation of old computers is generally very powerful, generally 1-2 times that of new computers. In other words, the computer's electromagnetic radiation level will not cause health harm.

--------------------------------------------------------------------------------

 

Tip 6: Computer placement is very important. Try not to let the back of the screen look at someone's place, because the most powerful computer radiation is the back, followed by the left and right sides, the front of the screen is the weakest radiation. Take the words clearly as the standard. At least 50 cm to 75 cm distance is required to reduce the electromagnetic radiation damage.

Truth: As mentioned above, the computer display screen, as a component of the computer, produces a limited amount of radiation. The size of the radiation depends not only on the position of the display screen, but also on the location of the chassis. It makes sense to choose a distance from the computer, because the size of the electromagnetic radiation is inversely proportional to the second square of the distance, distance can significantly reduce the radiation, it is only within the security standard that both downgrading and downgrading are of little significance. Distance and vision protection are another topic.

--------------------------------------------------------------------------------

 

7. Note indoor ventilation: Scientific research has confirmed that computer screens can generate a carcinogenic substance called dibenzfuran bromide. Therefore, it is best to install a fan in a computer room. If not, pay special attention to ventilation when surfing the Internet.

Truth: dibenzfuran bromide is the product of oxidation-coupled PBDE, a plastic fuel-resistance agent. This oxidation process is more common in plastic combustion, but rarely occurs in daily use. Therefore, in general, the amount of diphenfuran bromide in the plastic is very small, and it will not be released to the air, the impact on people is very small. This statement is likely to be a legacy of early suspicion of the plastic housing of the TV set, and it is placed on a computer screen. Note that the indoor ventilation is correct. If you push the damage to the computer, you are wrong.

--------------------------------------------------------------------------------

 

Tip 8: Eat more foods, such as carrots, bean sprouts, tomatoes, lean meat, and animal liver, which are rich in vitamin A, C, and protein, and often drink green tea.

Truth: see the truth of the second trick. Balance should be paid attention to the nutritional mix of food. If you ignore the intake of other nutrients to eat more of these foods, it will not be worth the candle. Note that you cannot take too little or too much nutrients, especially vitamin, when an adult consumes vitamin A (about 105 pig liver) equivalent to 3 × 6 kg μg of Vitamin A at a time, over 9 × 104 μg of vitamin A (about 1.8 kg pig liver) in children may cause acute poisoning. Adult daily intake: 2.25 ~ Vitamin A (about 104 ~ 1.5g pig liver ~ 3 × 104 μg (about 300 ~ G pig liver) sustained for more than 6 months will cause chronic poisoning. Therefore, excessive intake of foods rich in vitamin A is harmful.

--------------------------------------------------------------------------------

 

9: people who often work in front of the computer often feel dry and painful eyes. Therefore, it is necessary to put a few bananas on the computer desk. Potassium in bananas can help the human body to discharge excess salt, balance the body with potassium and sodium to relieve eye discomfort. In addition, bananas contain a large amount of beta carotene. When the human body lacks this substance, the eyes become painful, dry, with no light in the eyes, and less water loss, eating more bananas not only reduces these symptoms, but also relieves eye fatigue to some extent to avoid premature eye aging.

Truth: see the truth of the second trick. Supplementation of beta-carotene is beneficial to patients with vitamin A deficiency, but not to those without vitamin. When a common person is sitting in front of a computer for a long time, the dry eyes are caused by visual fatigue. Pay attention to taking a rest for about 15 minutes every 45-60 minutes to avoid excessive eye use. Bananas are indeed rich in potassium. It is beneficial for hypertensive patients to increase their potassium intake and reduce their sodium intake. However, the intake of any nutrients should be calculated based on the total nutrient intake every day. It is not appropriate or impossible to pin the intake of a certain nutrient to a single food.

--------------------------------------------------------------------------------

 

Conclusion: people who have been using computers for a long time really need to pay attention to maintaining the correct posture, and get up and exercise properly to relieve eye fatigue. However, the widely publicized radiation hazard is nothing, and it is equally unreliable to prevent radiation by eating anything. It is better to achieve a balanced nutritional mix in the diet.

This article is copyrighted by guokr.com. For more information, see the source. For commercial use, contact the fruit shell network.