What effect does slight radiation have on people? With the development of high technology, our life has been flooded with various electronic products, and many people don't know what the disadvantages of radiation are. Let me see the effect of slight radiation on the people you are with.
What effect does slight radiation have on people? 1 Radiation is very harmful to us. According to the survey, among the 20 million children born every year in China, 350,000 are defective children and 250,000 are mentally retarded children. It can be seen that radiation is very harmful to people. Long-term radiation can lead to mental disability in children. Electromagnetic radiation is the most critical factor leading to children's mental retardation, so mothers must be careful not to use mobile phones and computers for a long time during pregnancy.
If you are exposed to radiation for a long time, it will also induce cancer and accelerate the proliferation of cancer cells in the human body. In severe cases, it can also induce cancer. Electromagnetic radiation has a serious impact on people's lives, the circulatory system, reproduction, metabolic function and immunity, so we must stay away from radiation sources.
Radiation does more harm to people than that. Medical research has proved that long-term exposure to high electromagnetic radiation will change blood, lymph and cell protoplasm. It is very likely that the child will get leukemia, which is difficult to treat and must be taken seriously.
If exposed to high-dose electromagnetic radiation for a long time, it will also affect and destroy the original bioelectric current and magnetic field of human body, which will make our original electromagnetic field abnormal and cause very serious consequences.
I believe everyone knows the harm of radiation to people. Around us, many things have radiation, which is inevitable. However, use as little as possible and use electronic products as little as possible. Don't brush your mobile phone all the time before going to bed at night, and don't often stay up late at work in front of the computer. Eat more food that can prevent radiation.
What effect does slight radiation have on people? 2 What radiation is there in life?
Radiation is divided into non-ionizing radiation and ionizing radiation.
Non-ionizing radiation is no stranger to us, such as computers, mobile phones, home appliances, communication base stations and so on. Non-ionizing radiation has long wavelength and low energy, which is usually not enough to cause gene mutation or chromosome variation, so it can be used safely.
But ionizing radiation is different. Ionizing radiation can change the chemical state of substances, thus causing biological damage. Ionizing radiation has short wave length and high energy. The common types are alpha particles, beta particles, protons, neutrons, X-rays and gamma rays. Radiation sickness caused by ionizing radiation affects almost all organs and systems, especially the nervous system, hematopoietic organs and digestive system. Excessive radiation may even cause cancer or cause fetal death and deformity.
Ionizing radiation is often used in medical treatment, such as X-ray, CT and some instruments for radiotherapy. But there is a problem here. Are X-rays and CT harmful to human body? If so, how harmful is it?
Studies have shown that the ionizing radiation that the human body bears at one time is less than 100 millisieverts, which has little effect on the body. The data show that the annual background radiation dose per capita in the world is 2.4 millisieverts. The radiation dose of chest X-ray is 0.0 1-0.04 millisieverts, and that of cardiac catheterization is only 10 millisieverts. In terms of dose, the radiation amount of X-ray examination has little effect on the body. If we give up this efficient diagnostic technology because we are afraid of radiation, it is undoubtedly because we have choked on food.
Of course, this does not mean that technologies such as CT can be abused. If you don't know the dose of ionizing radiation, repeated exposure to ionizing radiation is still very dangerous. Before using CT, we should measure whether it is really necessary, and even if it is necessary, we should take the way of minimizing normal tissue irradiation. Especially pregnant women, because the fetus is more vulnerable to radiation, so be careful when doing relevant examinations.
So, what is the main source of background radiation? How to reduce radiation exposure?
Background radiation mainly comes from cosmic rays, surface radiation and internal radiation.
In fact, the universe is emitting cosmic rays all the time, but because of the thick atmosphere on the earth's surface as a barrier, the amount of radiation falling to the ground is very low. Therefore, living at higher altitudes will get more radiation. How to avoid the radiation of cosmic rays is also a difficult problem to be solved in the long-term exploration of outer space.
Surface radiation refers to the radiation released by rocks, soil, plants or minerals in nature, mainly gamma rays released by radon, potassium and uranium.
Internal radiation refers to the radiation produced by radioactive substances in the external environment after they enter the human body with air and food. Like smoking. For example, bananas contain radioactive element potassium -40, which may produce internal radiation when eaten in the body, but we can basically ignore this content.
Here, I want to explain again that in fact, everything in the universe has radiation, even the water we drink and the rice we eat are no exception, but these doses are small and negligible.
What really needs to be monitored are nuclear facilities, associated radioactive mines, radioactive material transportation, electromagnetic radiation from base stations, electric radiation from AC power transmission and transformation projects, and broadcasting electromagnetic radiation. , including some household appliances or electronic and electrical equipment. If you are in doubt about the amount of radiation, you can entrust a third-party testing institution recognized by the state, such as Zhongke Testing.
What effect does slight radiation have on people? How much influence does mobile phone radiation have on people's health?
We can simply understand electromagnetic waves as a kind of energy. For example, why do we feel hot in the sun? That's because our skin receives the energy of solar radiation, and this energy is light.
The reason why the microwave oven at home can heat food is because the microwave radiated by the microwave oven is actually a kind of energy, and the water molecules in the food can accept this energy. As the temperature increases, the temperature of the whole food will increase accordingly.
Electromagnetic waves can be divided into ionizing radiation and non-ionizing radiation. The former is radiation with higher energy than light, which is known to be harmful to human body (can induce cancer) and is mostly used in medical environment, such as X-ray, CT, PET-CT and radiotherapy. This kind of ionizing radiation carries huge energy and can damage human DNA, which is also an important principle that radiotherapy can kill cancer cells.
In addition, like the baggage X-ray security detector and medical X-ray diagnostic instrument in daily life, the internal image of the object is obtained by X-ray irradiation, so we'd better wait for the baggage to be sent out by the conveyor belt before taking it, and don't put our heads and hands into the door curtain to take it.
Non-ionizing radiation has a long waveform, so it has low frequency and low energy, and cannot ionize molecules of substances, so it cannot kill cells and destroy DNA, and can only produce thermal effects. The radiation of mobile phones, computers, Wi-Fi and microwave ovens we use every day is non-ionizing radiation. Energy is lower than ionizing radiation, which can make molecules in matter move. This is also the theoretical basis of microwave heating food.
At present, only the research of IARC, a subsidiary of WHO, shows that mobile phone radiation belongs to category 2B, which may cause cancer to human beings, but caffeic acid also belongs to category 2B carcinogen, which means that if you believe that mobile phones can cause cancer, then drinking coffee may not work for you.
Coincidentally, surprisingly, ultraviolet radiation in the sun belongs to the 1 standard of "carcinogenic to human beings". In other words, if you are worried about the influence of mobile phone radiation on your health, the effect of not basking in the sun will obviously be more obvious, and in this case, you may really have to "leave the earth".
However, it should be reminded that non-ionizing radiation does not do much harm to human body, but it also has a certain cumulative effect. Everyone has different ability to repair radiation damage. Therefore, for the sake of safety, don't talk about the radiation of such electronic products, but also have a deeper understanding of them and develop good habits.
First of all, we need to know, as far as mobile phones are concerned, when is the maximum radiation?
As we all know, the main factor that affects the radiation of mobile phones is the transmission power of mobile phones, and because the transmission power of mobile phones is directly related to the signal strength, it can also be considered that the radiation of mobile phones is related to the signal strength, but has nothing to do with the power of mobile phones and so on. It's nonsense to say that the radiation of the call is hundreds of times normal when the cell phone is running out of power.
Because when the signal is poor, the mobile phone will increase the transmission power in order to receive more signals. With the increase of mobile phone power, the radiation intensity of mobile phone will also increase. When the cell phone signal is particularly poor, the radiation of the cell phone may be dozens or even hundreds of times as good as the signal. It's like two people shouting at each other. The farther away they are, the louder the other person listens, the more they want to shout.
Generally speaking, the radiation of a mobile phone is the smallest when it is in standby, and the radiation is larger when it is talking. When the mobile phone number is dialed but not connected, the radiation is the largest, which is about three times that of standby. When the signal is poor, the radiation is much larger than normal.
When the surrounding signal is good, the mobile phone can easily get the signal, so the transmission power is small, and the radiation of the mobile phone will be relatively small at this time. However, when the signal is normal, many people have a similar experience, that is, after a long phone call, their ears or faces will get hot, and sometimes they even feel a little migraine. Is this because of radiation?
In fact, the discomfort caused by long-term use of the mobile phone is not caused by the radiation of the mobile phone, but by frequent use of headphones when making a phone call, which may also stimulate the external auditory canal and cause pain, and sometimes the excessive volume will also cause discomfort. In addition, the headache and ear discomfort caused by phone calls are more often caused by phone posture, hearing fatigue and work pressure.
To sum up, according to the characteristics of mobile phone radiation, we should develop good habits to minimize the impact of radiation on us.
First, when choosing a mobile phone, don't use fake unqualified mobile phones, because for any regular manufacturer, if it can go on sale, there will be basically no problem in radiation, otherwise it will not be recognized by the state, and it will be difficult to guarantee fake phones.
Secondly, generally speaking, the radiation of mobile phone is small when it is in standby, but the radiation is the largest when the phone number has been dialed but not connected, and the radiation amount is about three times that of standby. It's best to wait 2-3 seconds before connecting, and don't put it next to your ear at the beginning.
Third, try not to make cell phone calls in places where the cell phone signal is not good.
Fourth, try to reduce the time of each call. Stop talking immediately when one side of the head or face feels hot.
Fifth, don't use your mobile phone in the elevator. The elevator is surrounded by metal, which will reflect radiation and form a radiation confluence. Compared with the open environment, the radiation in the elevator is stronger.
However, it is more reliable for users to go to bed early, so there is no need to worry about radiation.