The radiation waves emitted by computers are often ignored. According to the international MPR radiation safety regulations, the radiation exposure within 50cm distance must be less than or equal to 25 V/m..
But do you know how much radiation the computer has? Computer radiation: 1, keyboard 1000V/m2, mouse 450V/m3, screen 2 18V/m4, host 170V/m5, notebook 2500 v/m.
In addition, radiated electromagnetic waves have eight hazards to human body:
1, promoting cell canceration.
2. Hormones are abnormal
3. Severe loss of calcium ions.
4. The onset of dementia
5. Abnormal pregnancy and abnormal delivery
6. Hypertension and heart disease
7, electromagnetic wave allergy
8. The increase in the number of suicides
When using a computer, we should pay attention to the four major hazards of computer radiation as follows:
1, computer radiation pollution will affect the circulatory system, immunity, reproduction and metabolic functions of human body, seriously induce cancer and accelerate the proliferation of cancer cells in human body. `
2. The reproductive system is mainly affected by the decline of male sperm quality, spontaneous abortion of pregnant women and fetal malformation.
3. The cardiovascular system affecting people is characterized by palpitation, insomnia, menstrual disorder, bradycardia, decreased cardiac blood volume, irregular sinus heart rate, leukopenia and decreased immune function of some women.
4. It has a bad influence on people's visual system. Because eyes belong to the sensitive organs of human body to electromagnetic radiation, excessive electromagnetic radiation pollution will also affect the visual system. Mainly manifested as decreased vision, causing cataracts and so on.
The results of the latest national supervision and spot check on the quality of computer products announced by the General Administration of Quality Supervision, Inspection and Quarantine yesterday show that the electromagnetic radiation in computers can not be ignored.
The General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ) randomly selected computer products from Beijing, Shanghai, Tianjin, Chongqing, Zhejiang, Hubei and other four provinces and cities, and the sampling pass rate was 72%. It is understood that the results of this spot check show that the computing speed, multimedia functions and software and hardware support of computer products in the domestic market have been greatly improved, but the product quality level of some enterprises is not stable enough. In this spot check, the computer products of Stone, Hewlett-Packard, Muze and other well-known enterprises were also identified as unqualified products.
It is understood that the main quality problems found in this national supervision and spot check of computer product quality are that the radiation disturbance and conduction disturbance indexes in electromagnetic compatibility exceed the standard. Radiation disturbance is a kind of electromagnetic interference emitted into space when the computer is working, which will affect the normal work of other electrical appliances, especially high-sensitivity electrical appliances. Conducted interference will affect the normal work of other electrical appliances in the same power grid, such as motherboard, graphics card, switching power supply, display, keyboard, mouse and so on. , constitute the whole system. If the choice is not good, it will cause too much radiation interference. During the spot check, it was found that some enterprises didn't understand the standards enough, and they didn't strictly control the procurement and assembly quality of production line parts, and lacked the necessary testing means, which led to unqualified products.
The seven companies, trademarks and models of microcomputer radiation disturbance found in this spot check are:
Beijing Stone Computer Technology Co., Ltd., Stone, shocked JS100; ;
Chongqing Xinbo Information Technology Development Co., Ltd., Xinbo, Free Village11kloc-0/;
Nanning Shengli Technology Co., Ltd., Victory, Leap Ⅰ;
Shanghai Taibo Computer Technology Co., Ltd., Taibo, BT-SMC-I 3298;
Wuhan Juxing Computer Co., Ltd., Shennaotong, JXSD530L；;
Beijing Heyuan Muze Technology Development Co., Ltd., Muze, E Fashion 510d; ;
Shanghai Hewlett-Packard Co., Ltd., Hewlett-Packard, P728 1—L2325.
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.
There are ingenious ways 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 should not be too dark, so as not to affect the effect because the brightness is too small, 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.
It is not good to face the computer for a long time. What should I do? In fact, four cups of tea a day can not only fight radiation, but also protect your eyes.
1. A cup of green tea in the morning:
Green tea contains powerful antioxidants and vitamin C, which can not only eliminate free radicals in the body, but also secrete hormones against stress. A small amount of caffeine contained in green tea can stimulate the central nervous system and cheer up the spirit. But it is best to drink it during the day, so as not to affect sleep.
2. A cup of chrysanthemum tea in the afternoon:
Chrysanthemum has the function of improving eyesight and clearing liver. Some people simply drink chrysanthemum and medlar together, or add honey to chrysanthemum tea to help relieve depression.
3. Tired of a cup of wolfberry tea:
Lycium barbarum is rich in beta carotene, vitamin B 1, vitamin C, calcium and iron, and has the functions of nourishing liver and kidney and improving eyesight. It is sweet in itself, and can be used as tea or as a snack like raisins, effectively solving the problem of "computer family" with astringent eyes and fatigue.
4. A cup of osmanthus tea in the evening:
Cassia seed has the functions of clearing away heat and improving eyesight, nourishing brain marrow, calming the liver and benefiting qi, and benefiting bones and muscles. People with constipation can also drink it after meals, which is very effective in treating constipation.
There are also some teas or snacks that are most suitable for computer families, which can help you fight radiation, protect your eyes and resist irritability.
Mung bean and barley soup
Mung beans can clear away heat and toxic materials, induce diuresis and reduce swelling, while Coix seed can strengthen the spleen and stop diarrhea, and lighten the body and replenish qi. For workers who often need to stay up late or get upset, thirsty, constipation and acne, besides eating more fruits and vegetables and supplementing water, eating mung bean and barley soup as a snack is very helpful for relieving summer heat and getting rid of boredom.
Duzhongcha
Eucommia ulmoides Oliv Has the functions of enriching blood, strengthening tendons and bones. It is very helpful for people who are sedentary and have low back pain. Both men and women can drink it. If you are a female friend, you can take it with Siwutang at the end of the physiological period.