Major events in 2020 are constantly due to the "Gengzi multi-hazard". There is one vaccine that can prevent 12 types of cancer. It is not easy to cause fires on rainy days. Wearing blue glasses for online classes can prevent myopia... These so-called " "Scientific truth" are actually rumors! Today, the Beijing Association for Science and Technology, the Beijing Municipal Office of Cyberspace Affairs, and the Capital Internet Association released the July "Science" rumors list to dispel the above rumors one by one.
1. Major events in 2020 are constantly due to "Gengzi multi-disaster"
gossip:
Every Gengzi year, the sun, the earth, Jupiter, Saturn and the Milky Way merge into a line, disrupting the earth’s gravitational field and magnetic field, causing the solar wind and plasma jets to pounce on the earth more strongly, affecting the air and water flow on the earth , Causing frequent occurrence of various natural disasters on the earth.
the truth:
It is absurd to attribute natural disasters or even man-made disasters to astronomical factors, and to put the earth, which is very "tiny" in the universe, behind the scenes.
Astronomically, some special astronomical phenomena occur every year, such as the golden ring solar eclipse that appeared not long ago, which is generally considered to be extremely rare in various news reports, and will only be seen until 2030. In fact, solar eclipses occur every year, but due to their location, each solar eclipse is only visible in certain areas. As long as you are willing to "cross-country chasing the sun", you can see the "once in ten years" solar eclipse every year.
The ancient Chinese believed that comets were broom stars, which was an ominous sign. But the meteor shower, which is widely sought after among modern young people, is the "flash" of comet fragments entering the earth's atmosphere.
There is also a popular saying that when people feel that work and life are not going well, they think that it may be caused by Mercury retrograde (commonly known as "mercury retrograde"). In addition to the so-called "mercury retrograde", other planets will also "retrograde." The reason is simple. The eight planets are like athletes running on different tracks in the same playground, running in circles around the playground counterclockwise. Some of these athletes run fast and some run slow. Sometimes athletes on different tracks are side by side and connected in a line. This is a normal phenomenon. The earth is on the third runway. As the distance between the earth and other "athletes" gets larger and larger, it will feel that others are backing away. This is entirely due to visual errors caused by choosing the earth as the frame of reference. In fact, these planets have never been retrograde at all.
In short, the appearance of various celestial phenomena in the sky is normal. In some years, there are indeed more natural disasters, but there is no causal relationship between the two. It is unscientific to pull two unrelated facts together and draw a wrong conclusion.
2. There is 1 vaccine that can prevent 12 types of cancer
gossip:
The DCV cancer vaccine can prevent more than 12 types of cancers including prostate cancer, breast cancer, and lung cancer.
the truth:
Some media reported recently that the Hong Kong MDX Medical Group released the "DCV Cancer Vaccine", which can prevent more than 12 types of cancer including prostate cancer, breast cancer, and lung cancer.
In fact, malignant tumors are "heterogeneous", even if they are classified as the same tumor, they may be completely different. At present, it is difficult to prevent lung cancer, let alone prevent 12 kinds of cancer. As mentioned in the product description of "DCV Cancer Vaccine", it is impossible to control the broad-spectrum WT1 gene (assuming that the injected substance can regulate the gene) is impossible. The so-called "universal gene" is a fiction.
At present, tumor vaccines are divided into preventive and therapeutic types, which are injected into healthy people and tumor patients respectively. Preventive tumor vaccines can only target tumors caused by viruses and other microorganisms. These types of tumors can be prevented because they can clearly form the mechanism. There are already many preventive tumor vaccines on the market, such as cervical cancer vaccine and hepatitis B vaccine. The application of therapeutic tumor vaccines is relatively few. Currently, only one tumor vaccine for the treatment of prostate cancer is marketed in the United States, and many therapeutic products are still in clinical trials.
3. It is not easy to cause fire in rainy days
gossip:
The rainy season is not prone to fire.
the truth:
When it comes to fire prevention, people usually pay more attention to hot and dry weather, but in fact, fires are prone to fire on rainy days. Rain only increases the humidity of the air and cannot reduce the occurrence of fires.
There are many reasons for fire accidents in cloudy and rainy days. For example, in the humid environment of cloudy and rainy days, outdoor high-voltage lines, transformers, substations and other power facilities are prone to sparking; some lines exposed to the outdoors are worn out and aging, and they are exposed to rain for a long time. Corrosion, prone to short-circuit ignition.
When the air is humid, the dust and impurities inside the electrical appliances (especially some older electrical appliances that have been in service over a period of time) become conductive due to moisture. When the electrical appliance is energized, the soaked dust and impurities are easily broken down by the current and cause burning.
When the power plug is in poor contact, wet weather or dust on the insulating surface of the plug will cause insulation damage over time, resulting in a carbonization channel, and the positive and negative poles of the plug will generate a large amount of current, which is "creepage". When the current is too large, it is easy to ignite nearby combustibles.
In addition, in thunderstorms, electrical appliances and charging equipment in residents' homes may accidentally catch fire due to lightning strikes. Therefore, while doing safe travel protection on rainy days, don't neglect fire prevention on rainy days.
4. Wearing blue glasses in online classes can prevent myopia
gossip:
You should wear anti-blue light glasses when you are online, which can effectively protect your eyesight and prevent myopia.
the truth:
Myopia in children and adolescents is mainly caused by long-term use of electronic products, resulting in visual fatigue and improper posture. The blue light of electronic products is not the "culprit" of myopia, and the improper selection of anti-blue glasses is harmful and useless.
The commonly referred to as blue light refers to visible light with a wavelength range of 400-500 nanometers. Blue light is widely found in nature, not only in electronic screens, but also in sunlight and many LED lamps.
Blue light has the possibility of causing damage to the retina, which is related to the dose of blue light received by the retina. In other words, blue light irradiation can only cause damage to the retina only after reaching a sufficient time and a certain intensity.
Qualified electronic products have filtered the harmful short-wave blue light, and their blue light hazards are basically at a non-hazardous level. In other words, the blue light that is exposed to the correct use of mobile phones and tablet computers will generally not cause damage to the eyes, and there is no direct evidence that blue light causes myopia. Parents need not worry too much about the so-called "blue light hazards."
Inappropriate selection of anti-blue glasses is harmful to the prevention of myopia. There is not enough medical evidence to prove that products such as anti-blue glasses can play a significant role in preventing and controlling myopia. On the contrary, due to the large number of anti-blue light products, the quality of the products is uneven, if the purchase is not appropriate, it is easy to cause damage to children's eyes. Therefore, adopting the correct posture and avoiding long-term use of electronic products such as mobile phones and tablets can prevent children and adolescents from having myopia.
5. The risk of major earthquakes around the capital has increased
gossip:
After the Tangshan magnitude 5.1 earthquake in the early morning of July 12, the risk of a major earthquake around the capital has increased.
the truth:
After the Tangshan earthquake with a magnitude of 7.8 on July 28, 1976, the local crust was ruptured severely and it was easy to accumulate crustal stress. The accumulation of stress to a certain extent will cause some earthquakes of different sizes, which is a relatively normal state of activity in the old earthquake area. The magnitude of this earthquake is 5.1, which is a moderate earthquake and will not cause major damage. The general public in the Beijing-Tianjin-Hebei region need not worry too much about this.
Historical statistics show that the seismic activity around the capital area has been showing periodic changes, weak in some periods and strong in some periods. Although the seismic activity around the capital area has increased relative to previous years, and Beijing has experienced many earthquakes of magnitude 3 in recent years, overall, the seismic activity in the entire area around the capital area is still at a low level. , And below average. The current activity is only relative to its previous years. The overall trend is slow, not accelerated, and the overall state of seismic activity is still low.
However, according to the cyclical activity of crustal stress, the trend of seismic activity in the entire North China region is worthy of attention and vigilance. For the Beijing-Tianjin-Hebei region, especially the capital, Beijing, it is necessary to prevent higher-level earthquakes as early as possible and scientifically. Good earthquake safety education.
6. The better the physique, the more likely it is to have heat stroke
gossip:
People with better physiques are more adaptable to the environment. Once they have adapted to high temperature weather, they are more likely to turn a blind eye to dangers, which can cause heat stroke.
the truth:
The professional name of heat stroke is "heat stroke", which can be divided into two types: classic heat stroke (also called non-worked heat stroke) and exertional heat stroke. The former is more common in the elderly and the sick, while the latter is more common in the strong and healthy people working in a high temperature environment. But for the frail people, even if they don't work hard, they can get caught. Compared with "work-induced heat stroke", the "classic heat stroke", which mainly harms the frail, is more dangerous.
Data show that the population incidence of classic heat stroke during the summer high temperature is (17.6-26.5)/100,000. Among the patients who are hospitalized for this reason each year, if they are seriously ill and enter the intensive care unit, the mortality rate can be as high as 70%. About half of the patients who died of heatstroke occurred in their homes, and less than one-third of those who died in the workplace.
It can be said that the stronger the ability to adapt to heat, the less likely it is to suffer from heat stroke. If you have heat stroke, it means you have not adapted to the environment, or the environment has exceeded the limit of human physiological tolerance. For frail people, heatstroke is likely to make things worse. Elderly patients are prone to have basic diseases such as hypertension, diabetes, coronary heart disease, and use a variety of drugs at the same time. These are risk factors that lead to increased heatstroke risk and mortality. The younger the child, the less mature the body temperature regulation function and the weaker the adaptability to environmental changes. Once heat stroke occurs, the progress is very rapid. Almost every summer there are accidents where children are locked in a car and die for a short time. Therefore, as summer is coming, the elderly and children need our attention to avoid heat stroke.
7. Mosquito bites can spread the new coronavirus
gossip:
Do not go to places where there are many mosquitoes, because mosquito bites can spread the new coronavirus.
the truth:
A study by Kansas State University in the United States confirmed that the new coronavirus cannot be transmitted to humans through mosquitoes, supporting the World Health Organization (WHO) that mosquitoes cannot transmit the new coronavirus. The research team of the University's Institute of Biosafety tested the ability of the new coronavirus to infect and replicate in three common and widely distributed mosquitoes through intrathoracic inoculation of the virus. These three mosquitoes are Aedes aegypti, Aedes albopictus, and Culex pipiens pipiens. They represent the two most important arbovirus genera that infect humans.
Intrathoracic vaccination is the most extreme method of virus attack on mosquitoes. If the new coronavirus does not replicate in the mosquitoes after vaccination in the thoracic cavity, the possibility of the mosquitoes transmitting the virus can still be ruled out even if the mosquito sucks the blood of patients containing the virus.
The researchers detected the new coronavirus in samples collected within two hours of inoculation, confirming that the virus can be effectively transmitted to mosquitoes; but the virus was not detected in 277 samples collected at all time points 24 hours after inoculation . It can be concluded that the new coronavirus cannot replicate in mosquitoes, and mosquitoes will not become a vector of the virus.