Clinical medical experiments and epidemiological investigations have confirmed that: the human body in a certain dose of radiation exposure, will produce a variety of biological effects harmful to health, such as:
1. Acute radiation damage
Dose less than 1Gy, a small number of dizziness, fatigue, loss of appetite, and other mild symptoms, there is a temporary change in the blood picture; When the dose is 1~10Gy, hematopoietic acute radiation sickness which mainly causes damage to the blood system will appear; when the dose is 10~50Gy, intestinal acute radiation sickness which mainly causes symptoms in the digestive tract will appear, and if it is not treated in time, it can be 100% dead within 14 days; when the dose is more than 50Gy, cerebral acute radiation sickness which mainly causes symptoms of brain damage will appear, and it can be dead within 2 days.
2. Chronic radiation damage
The whole body long-term overdose chronic irradiation, can cause chronic radiation sickness. Chronic radiation sickness is dominated by neurasthenia syndrome, and accompanied by changes in the hematopoietic system and related organ function, leukopenia or increase.
Local high-dose irradiation, can produce local chronic damage, such as chronic skin damage, causing blood disorders, impaired fertility, cataracts and so on.
3. Damage to the embryo and fetus
The embryo and fetus are sensitive to radiation. Exposure to radiation before embryo implantation can increase the stillbirth rate; exposure during organogenesis can increase the rate of fetal malformations and the neonatal mortality rate accordingly.
4. Long-term effects
In the medium and large dose range, radiation carcinogenesis has been confirmed by animal experiments and epidemiological investigations. In acutely irradiated populations, the incidence of various cancers, such as leukemia, lung cancer, thyroid cancer, breast cancer and bone cancer, increases with the increase in irradiation dose.
The hazards of computer radiation
The radiation waves emitted by computers are often overlooked. According to the international MPR II radiation safety regulations: in the 50cm distance must be less than or equal to 25V/m radiation exposure.
But you know how much computer radiation? Computer radiation: 1, keyboard 1000V/m2, mouse 450V/m3, screen 218V/m4, host 170V/m5, Notebook 2500V/m
In addition, the radiation electromagnetic waves on the human body has eight major harm:
1, cellular cancer promotion
2, hormonal irregularities
3
3, calcium ion intense loss
4, dementia triggered
5, abnormal pregnancy abnormal birth
6, high blood pressure heart disease
7, electromagnetic wave allergies
8, an increase in suicidal
Using computers you have to pay attention to the four major hazards of computer radiation are as follows: !)
1, computer radiation pollution will affect the human body's circulatory system, immune, reproductive and metabolic functions, serious also induce cancer, and will accelerate the proliferation of cancer cells in the human body. `
2, affecting people's reproductive system is mainly manifested in men with reduced sperm quality, pregnant women with spontaneous abortion and fetal malformation, etc. 2.}N
3, affecting people's cardiovascular system manifested in palpitations, insomnia, some women's menstrual disorders, bradycardia, decreased cardiac output, sinus irregularities, leukocyte reduction, decreased immune function, etc. 5S
4, on people's visual system has an adverse effect due to the eyes belong to the human body on the sensitive organ of electromagnetic radiation, excessive electromagnetic radiation pollution will also have an impact on the visual system. The main manifestation of vision loss, causing cataracts, etc. Zc=
The State Administration of Quality Supervision yesterday announced the latest computer product quality national supervision and sampling results show that the electromagnetic radiation in the computer can not be ignored.
The AQSIQ sampled computer products in Beijing, Shanghai, Tianjin, Chongqing, Zhejiang, Hubei and other 14 provinces and cities, the sampling pass rate of 72%. It is understood that the sampling results show that the current domestic market in the computer products in the computing speed, multimedia features and hardware and software support than before have improved, but some companies are not enough to stabilize the level of product quality. In this sampling, four pass, HP, Muze and other well-known enterprises of computer products were also identified as unqualified products.
It is understood that the computer product quality national inspection and sampling process found in the main quality problems is electromagnetic compatibility in the radiation nuisance, conducted nuisance indicators exceed the standard. Radiation harassment is a computer work to space emitted by an electromagnetic wave interference, this interference will affect other electrical appliances, especially high-sensitivity electrical appliances work properly; Conducted harassment will affect the normal operation of other electrical appliances in the same grid, such as the composition of the entire system of motherboards, display cards, switching power supplies, monitors, keyboards, mice, etc., if you buy a bad radiation harassment caused by the exceeding standards. Sampling found that some enterprises due to insufficient understanding of the standard, parts and components import control and production line assembly quality control is not strict, the lack of necessary testing methods, resulting in product quality is not qualified.
The seven microcomputer radiation harassment found to exceed the standard of enterprises, trademarks and models are:
Beijing SITONG Computer Technology Company Limited, SITONG, shock JS100;
Chongqing Xinbo Information Technology Development Company Limited, Xinbo, the free village 1101;
Nanning Shengli Science and Technology Company Limited, Shengli, across the I.
Nanning Shengli Science and Technology Company Limited, Shengli, across the I.
Shanghai, Shanghai, China;
Shanghai Botai Computer Technology Co., Ltd, Botai, BT-SMC-I3298;
Wuhan Juxing Computer Co., Ltd, Shenbintong, JXSD530L;
Beijing Heyuan Muze Science and Technology Development Co., Ltd, Muze, E Fashion 510D;
<Shanghai Hewlett-Packard Company Limited, HP, P7281-L2325.
Uncovering the X-files of computer "radiation"
As the saying goes, "There is no such thing as gold. Computer, as a modern high-tech products and electrical equipment, in bringing more convenience, efficiency and joy to people's lives at the same time, there are also some harmful factors to human health.
The computer on human health hazards, from the type of radiation, mainly including computers in the work of electromagnetic radiation (various electromagnetic rays and electromagnetic waves, etc.), sound (noise), light (ultraviolet, infrared radiation, as well as visible light, etc.) and other types of radiation "pollution".
From the point of view of the source of radiation, they include CRT monitor radiation sources, chassis radiation sources, as well as speakers, printers, photocopiers and other peripheral equipment radiation sources. One of the CRT (cathode ray tube) monitor imaging principle, determines that it is difficult to completely eliminate harmful radiation in the use of the process. Because it is working, its internal high-frequency electron gun, deflection coil, high-voltage packages and peripheral circuits, will produce such as ionizing radiation (low-energy X-rays), non-ionizing radiation (low-frequency, high-frequency radiation), electrostatic fields, optical radiation (including ultraviolet, infrared radiation and visible light, etc.) and other rays and electromagnetic waves. While the liquid crystal display is the use of physical properties of liquid crystal, its working principle is completely different from the CRT display, inherently radiation-free (negligible), environmentally friendly "health" type of display; chassis internal components, including high-frequency, power consumption of the CPU, with a large number of internal integration of transistors of the main chip of the card The various components inside the chassis, including high-frequency, power-consuming CPU, various boards with a large number of internal transistors integrated into the main chip, with high-speed DC servo motors of the CD-ROM drive, floppy drive and hard disk, a number of cooling fans and transformers inside the power supply, etc., when the work of the low-frequency electromagnetic radiation and noise interference. In addition, external speakers, copiers and other peripheral equipment radiation source is also a not to be ignored "source".
From the point of view of the degree of harm, there is no doubt that electromagnetic radiation is the most harmful. Medical experts at home and abroad research shows that long-term, excessive electromagnetic radiation will cause direct harm to the human reproductive system, nervous system and immune system, is the main cause of cardiovascular disease, diabetes, cancer mutation and cause pregnant women miscarriage, infertility, teratology and other lesions of the triggering factors, and can directly affect the minors of the body's tissues and bone development, caused by visual acuity, memory loss and decreased hematopoietic function of liver In addition, electromagnetic radiation can directly affect the development of body tissues and bones of minors, causing vision, memory loss and decreased hematopoietic function of the liver. In addition, electromagnetic radiation is also a hidden danger to information security, the use of specialized signal receiving equipment can be received and deciphered, resulting in information leakage and unnecessary losses. Excessive electromagnetic radiation will also interfere with other electronic equipment around, affecting its normal operation and electromagnetic compatibility (EMC) problems.
Therefore, electromagnetic radiation has been listed by the World Health Organization as the fourth largest source of environmental pollution following the water, air, noise, and become a hazard to human health invisible "killer", electromagnetic radiation protection has become a priority.