How harmful is the station security inspection machine to human body? The radiation dose of the station security machine is not very large. Generally speaking, as long as you pay attention to the following points, it will not affect your health.
(1) Only trained or approved personnel can operate the X-ray safety inspection instrument.
(2) The X-ray safety inspection instrument has been inspected in strict accordance with national standards before leaving the factory. It can ensure the safety of operators, passengers and items in luggage under the condition of correct installation and use by trained and qualified operators.
(3) When performing equipment, there must be a special person on duty, otherwise it may cause mechanical or radiation damage to people who touch the equipment at will, or damage the equipment.
(4) The X-ray safety inspection instrument will only emit micro-dose X-rays when the inspected object passes through the inspection area or is artificially given. At this time, the red signal light of "X-ray emission" lights up, and the equipment will not emit X-rays at other times.
(5) When the "emergency stop switch" button directly above the detection channel is pressed or the large protective plates on both sides of the system are opened, the X-ray generator can be turned off immediately.
(6) During the normal operation of the equipment, no part of the operator and passengers should enter the lead rubber curtain of the detection channel, otherwise radiation injury may be caused.
(7) During the normal operation of the equipment, when transporting luggage and parcels, any part of the operator and passengers' bodies should not touch the conveyor belt and rollers, otherwise they may be caught or squeezed.
(8) If the situations described in (5) and (6) occur, you can immediately press the "emergency stop switch" button, and the equipment will be processed after stopping execution.
(9) Only specially trained personnel with mechanical, electrical, electronic and computer-related professional skills can disassemble, maintain and repair the relevant components of the X-ray safety inspection instrument.
(10) Any mechanical, electrical and electronic components that do not belong to the X-ray safety inspector are connected to the power supply unit or system of the X-ray safety inspector, which may affect the normal operation of the equipment and even damage the equipment.
(1 1) Without the permission of the manufacturer, any change or upgrade to the hardware or software of the computer system may lead to system failure or crash. It is not allowed to use all kinds of mobile storage devices, all kinds of CDs and audio-visual devices in the system computer to prevent the system from being infected with viruses or damaged.
(12) If the lead rubber curtain, emergency stop switch, ray signal lamp and other safety devices of the detection channel are found to be damaged, you should contact the manufacturer to replace them in time to avoid radiation damage caused by ray leakage.
How harmful is the flaw detector to human body and how safe is it? It's usually about 50 meters. In short, the farther away, the better. There are only three kinds of distance protection for ionizing radiation. X-rays produced by flaw detector will kill red blood cells and make people suffer from leukemia and cancer!
How much harm does hepatitis B and Big Three Yang do to human body? At first, Xiao Sanyang turned positive, then Da Sanyang, and then cirrhosis. If liver cancer is basically incurable in the advanced stage, it should be treated as soon as possible, but I know a person, my friend's father, who is an old Chinese medicine practitioner. It seems that I heard that he has decades of experience, and he is almost 60 years old. I saw with my own eyes that all the people who came to his house to see a doctor were super swollen, and there were many flags hanging in his house, which seemed to be the way it was. I am really a good person. I am definitely not the kind of person who cheats money like an expert. I am an old Chinese doctor. If you need, you can consult me and declare that I am from Guangxi. Tel: 0775-6239159 0775-89022051kloc-0/065558.
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Because hepatitis B virus can penetrate deep into human cell membrane, and the existing drugs can only play a role in extracellular body fluids, almost all drugs can only alleviate the disease, but can not achieve the goal of radical cure. It is a pity that the radical cure of hepatitis B is still a worldwide medical problem. . .
How harmful is wireless walkie-talkie to human body? China has strict technical limit standards for electromagnetic radiation. In order to prevent electromagnetic radiation pollution and ensure public health, since the 1990s, the national environmental protection and health departments have successively formulated and issued seven regulations and national standards, including "Hygienic Standard for Environmental Electromagnetic Waves", and formulated grading standards for electromagnetic radiation: the first-class standard (safety standard, which has no impact on human body) is that high-frequency radiation is less than 10 μW/cm2, and low-frequency radiation is less than1cm2. The high-frequency radiation is less than 40 μW/cm2, and the low-frequency radiation is less than 25v/m. Because many electronic devices emit high-frequency and low-frequency electromagnetic radiation at the same time, we have tested each device at the same time! All kinds of data we tested only show that the test samples have such radiation data. As a communication tool, does the walkie-talkie radiate? How big will the radiation be? The result of the measurement may surprise you! Low-frequency radiation: the radiation when the walkie-talkie is not talking: 0.275V/m, which is within our safety range and has no harm to human body. Unit (electric field intensity V/m) Low-frequency radiation: the radiation of interphone when talking: 159.5 V/m Among the computer components we have measured, the electric field intensity of the router is the largest, reaching 2.2V/m, while the radiation value of a small interphone actually reaches159.5 v/m. Look at the picture carefully. The values of other components have been measured in the past, but please pay attention to the units. The previous one is mv/m, and the difference between Mv/m and V/m is 65438+. Because it is in the state of not talking, the radiation value suddenly increased by nearly 1000 times at the beginning of talking. Here, we should remind friends who often use walkie-talkies to pay attention to the harm of walkie-talkie radiation to human body and do a good job of protection. Unit (electric field intensity V/m) High-frequency radiation: the radiation size of interphone when it is not talking: 0.0 18μW/cm2, which is within our safe range and does no harm to human body; the radiation value of interphone when it is talking is 5866μW/cm2, which is far beyond the safe range that human body can bear, and long-term exposure to this radiation intensity will do harm to human body. Among the computer components we have tested, the high-frequency radiation of the wireless router is the largest, reaching 1.049μW/cm2, while the radiation value of the walkie-talkie actually reaches 5866μW/cm2, and the figure is 5.866mw/cm2. Note that the previous units are μw/cm2, mw/cm2 and vμw/cm2, with a difference of 65438+.
How much self-defense electric batons do harm to human body depends on where and how long it takes.
For limbs, the average time is 1-2 seconds. Mainly pain and numbness.
The point is that shaking parts such as the head, neck and heart are very dangerous.
Generally speaking, these positions should not exceed 5 seconds.
How harmful is the circuit of DC24V 2.5A to human body? 24V DC is harmless to human body, because the panel has high resistance (several hundred K ohms to several M ohms), so the current is very small.
How harmful is the computer to human radiation? The brain is an epoch-making invention, which brings convenience to people's work, study and life, but also brings anxiety. People are more or less worried about the health effects of long-term computer work, such as whether computer radiation will cause harm to the human body. Young women and pregnant women are more afraid that it will affect fertility or harm the fetus.
In fact, computers do form weak electromagnetic fields when they work, but it is still inconclusive whether long-term exposure will cause cancer or be harmful to human body.
Some scholars believe that this electromagnetic field may cause cancer. The electromagnetic field generated by computer is scattered, and a computer operator will be influenced by other computers around him besides his own computer.
According to an American research report, if a pregnant woman works in front of a computer for more than 20 hours a week, her chances of miscarriage in the first three months are twice as high as others. Therefore, pregnant women should avoid getting close to computers during pregnancy. In addition, the electromagnetic field of color computer is 3-4 times that of black-and-white computer. So, how much harm does computer do to human body?
The news media at home and abroad have reported many times that computer screens cause abortion, teratoma, facial rash, cataract and photosensitive epilepsy, but this conclusion cannot be confirmed by epidemiological statistical analysis, and the expert group of the World Health Organization also holds this opinion.
At the same time, the monitoring results also show that X-ray, ultraviolet ray, infrared ray, ultra-low frequency, electrostatic field and acoustic radiation generated by computer or TV screen are within the allowable range. However, it is worth noting that computer screens can cause visual fatigue. The characters on the computer screen are constantly changing and scrolling up and down, which will cause some harm to the eyes. In addition, the imbalance of positive and negative ions in the indoor environment where computers are placed will also cause autonomic nerve disorder and depression of users. Experts point out that a reasonable diet helps to prevent computer operators from suffering from "computer diseases". The main thing is to eat breakfast well and ensure adequate nutrition and calories to maintain vigorous energy; Chinese food should be rich in protein; Dinner is light, eat more foods with high cellulose content, and consciously choose foods that protect your eyes to prevent myopia or other eye diseases.
How harmful are ammonium bicarbonate and methanol to human body? Ammonium bicarbonate is a chemical fertilizer. This fertilizer will volatilize ammonia, which has a strong effect on human eye mucosa and nasal mucosa. Long-term exposure to this environment will make people cry and feel uncomfortable.
Methanol is often called formalin (used to store corpses). It can destroy various proteases in the human body. If you don't eat a lot of raw eggs and fresh milk immediately after eating by mistake, 100% will be finished!