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The latest scientific gossip list is released: eating shrimp and fruit together will produce arsenic, myopia will not get presbyopia also--
Can Omicron escape the new crown test? not so easy
The Omicron mutant strain, which has recently set off a "new crown storm" in the world, is rumored to have an "invisible variant" that can evade the new crown test, and infected people cannot be detected
.
Is Omicron really that cunning? The latest issue of the scientific gossip list has been released, covering the five popular health pseudo-knowledges in one fell swoop
.
In addition, eating shrimp and fruit together will produce arsenic? Nuclear heating hot water with radiation? Will I get presbyopia if my myopia is old? Did you fall for these rumors?
.
Is Omicron really that cunning? The latest issue of the scientific gossip list has been released, covering the five popular health pseudo-knowledges in one fell swoop
.
In addition, eating shrimp and fruit together will produce arsenic? Nuclear heating hot water with radiation? Will I get presbyopia if my myopia is old? Did you fall for these rumors?
The monthly "scientific" rumor list is guided by the Beijing Association for Science and Technology, the Beijing Municipal Internet Information Office, and the Capital Internet Association
.
.
gossip
Masks can leave carcinogens
Shake before use
There is a saying circulating on the Internet: "Ethylene oxide", the residue of mask disinfection , is a type of carcinogen.
After opening the package, the mask should be thrown in the air to greatly reduce the ethylene oxide value, otherwise it will cause cancer
.
Is it really?
After opening the package, the mask should be thrown in the air to greatly reduce the ethylene oxide value, otherwise it will cause cancer
.
Is it really?
The truth: Ethylene oxide is an organic compound.
It is indeed a toxic carcinogen.
It can be used to make fungicides and is widely used in washing, pharmaceutical, printing and dyeing industries
.
Most of the medical surgical masks and N95 masks that can be purchased on the market are fumigated and sterilized by ethylene oxide sterilization steam
.
It is indeed a toxic carcinogen.
It can be used to make fungicides and is widely used in washing, pharmaceutical, printing and dyeing industries
.
Most of the medical surgical masks and N95 masks that can be purchased on the market are fumigated and sterilized by ethylene oxide sterilization steam
.
However, mask manufacturers will pack them after sterilization and after the ethylene oxide has evaporated
.
In addition, residual ethylene oxide will be tested, and masks must meet national standards, that is, less than 10 μg/g before they leave the factory
.
.
In addition, residual ethylene oxide will be tested, and masks must meet national standards, that is, less than 10 μg/g before they leave the factory
.
A mask, from packaging, to ethylene oxide sterilization, and then to the analysis time in the factory, before leaving the factory, warehousing, transporting, selling, until it reaches consumers, it will take at least one month, while ethylene oxide The alkane itself is volatile, and it has already met the national standards when it leaves the factory.
Coupled with such a long period of volatilization, the possibility of residual and health hazards is really "minimal"
.
Coupled with such a long period of volatilization, the possibility of residual and health hazards is really "minimal"
.
The ethylene oxide residues of randomly sampled mask samples are all lower than the national standard , which will not pose a threat to the wearer's health
.
When buying masks, you must buy products produced by regular enterprises , and the residues meet national standards and will not pose a threat to the wearer's health
.
.
When buying masks, you must buy products produced by regular enterprises , and the residues meet national standards and will not pose a threat to the wearer's health
.
gossip
Eating shrimp and fruit together produces arsenic
The main reason for the saying that "shrimp and fruit are eaten together will produce arsenic" is that after eating shrimp and fruit at the same time, the arsenic pentoxide contained in shrimp will be combined with the rich vitamins in many fruits.
C undergoes a chemical reaction in the body to form arsenic trioxide, or "arsenic", which can be fatal in toxicity
.
C undergoes a chemical reaction in the body to form arsenic trioxide, or "arsenic", which can be fatal in toxicity
.
Truth: Can eating these two foods at the same time really be so toxic? Actually, no
.
.
Scientists have found through a large number of experiments that seafood such as shrimp and crabs do not contain much arsenic, and the content of arsenic pentoxide per kilogram of shrimp does not exceed 0.
5 mg
.
The dose of arsenic (arsenic trioxide) that causes poisoning is 50mg
.
According to the calculation of the conversion coefficient, if the arsenic contained in the shrimp reaches the maximum limit of 0.
5mg/kg, and there is enough vitamin C to react with it, a person needs to eat at least 40 kg of shrimp to reach the toxic dose
.
5 mg
.
The dose of arsenic (arsenic trioxide) that causes poisoning is 50mg
.
According to the calculation of the conversion coefficient, if the arsenic contained in the shrimp reaches the maximum limit of 0.
5mg/kg, and there is enough vitamin C to react with it, a person needs to eat at least 40 kg of shrimp to reach the toxic dose
.
Just imagine, eating 40 kilograms of shrimp in one go, plus enough fruit, how can a person's stomach hold it? In fact, neither Chinese medicine theory nor modern medical theory has the saying that "food is mutually restrained"
.
.
gossip
Omicron will be "invisible" and the new crown cannot be detected
Fact: The World Health Organization has confirmed at the end of November 2021 that the gold standard for diagnosing the new crown-PCR test can detect the mutant strain of Omicron
.
.
PCR detection generally measures two and three gene sequences of the new coronavirus.
A mutation in the S protein of Omicron, the deletion of amino acids 69-70, will cause the S gene to be undetectable during PCR detection, but in addition Two gene segments were positive
.
Then the result is still positive, and people infected with Omicron can still be tested
.
Not only that, but also through the characteristics of the S gene deletion, it is also possible to quickly detect how many of these positive cases are Omicron variants
.
A mutation in the S protein of Omicron, the deletion of amino acids 69-70, will cause the S gene to be undetectable during PCR detection, but in addition Two gene segments were positive
.
Then the result is still positive, and people infected with Omicron can still be tested
.
Not only that, but also through the characteristics of the S gene deletion, it is also possible to quickly detect how many of these positive cases are Omicron variants
.
The Omicron case in South Africa was also inferred mainly from the S gene deletion
.
.
Recently, British scientists discovered that Omikron actually has two branches.
One branch does not have amino acid deletions at positions 69-70, which is dubbed the "stealth" Omikron
.
But no matter which branch it is, it will not evade PCR detection, but it is different in whether the virus can be determined by PCR detection or not
.
One branch does not have amino acid deletions at positions 69-70, which is dubbed the "stealth" Omikron
.
But no matter which branch it is, it will not evade PCR detection, but it is different in whether the virus can be determined by PCR detection or not
.
gossip
Nuclear heating hot water with radiation
There have been recent rumors that the hot water for nuclear heating has radiation, and if the heating pipes leak, the consequences will be disastrous
.
Is it really so evil?
.
Is it really so evil?
Fact: The heat generated by the nuclear reaction first enters the residents' homes after being converted by layers of media, so there will be no radiation in the heating pipes
.
.
Like thermal power plants, nuclear power plants can also achieve "cogeneration", that is, generate electricity and heat at the same time
.
The heat generated by the nuclear power plant will undergo "multi-stage heat exchange" through the heat exchange station in the plant and the heat exchange station of the heat supply enterprise outside the plant, and finally the heat will be transferred to the end user through the municipal heating pipe network
.
.
The heat generated by the nuclear power plant will undergo "multi-stage heat exchange" through the heat exchange station in the plant and the heat exchange station of the heat supply enterprise outside the plant, and finally the heat will be transferred to the end user through the municipal heating pipe network
.
In the whole process, there are only two modes: "steam heating water" and "water heating water".
There are multiple loops between the nuclear power plant and heating users, and only heat is transferred between each loop
.
Without the exchange of water, no radioactive material can enter the user's heating pipes
.
There are multiple loops between the nuclear power plant and heating users, and only heat is transferred between each loop
.
Without the exchange of water, no radioactive material can enter the user's heating pipes
.
gossip
Myopia will not get presbyopia
Short-sightedness means that it is difficult to see far away, and presbyopia means that it is difficult to see at close range
.
Does this logic really hold?
.
Does this logic really hold?
Fact: Myopia is mostly caused by genetic factors or long-term bad eye habits, which leads to the weakening of the refraction of the cornea and lens, which in turn causes the parallel light to focus in front of the retina, making it difficult to see distant objects
.
.
And presbyopia is due to aging, the lens gradually hardens, the elasticity weakens, and the contraction function of the ciliary muscle decreases, which in turn impairs the function of vision adjustment, making it difficult to see close objects
.
.
Presbyopia is not a disease, but a natural decline in the ability of the human eye to adjust, which is a normal functional degradation
.
Presbyopia usually occurs slowly, starting around age 45, and generally stabilizes by age 65 to 70
.
It's a condition of aging in the body, and it's irresistible
.
.
Presbyopia usually occurs slowly, starting around age 45, and generally stabilizes by age 65 to 70
.
It's a condition of aging in the body, and it's irresistible
.
Therefore, myopia and presbyopia are essentially different from the pathological point of view.
Myopia is caused by refractive error, while presbyopia is caused by lens degeneration and loss of elasticity
.
People who were myopic originally, who developed presbyopia after getting old, will face the problem of "not being able to see far and near".
At this time, they need to prepare two pairs of glasses with different degrees or choose to wear progressive multifocal glasses
.
Text/Reporter Li Jie
Myopia is caused by refractive error, while presbyopia is caused by lens degeneration and loss of elasticity
.
People who were myopic originally, who developed presbyopia after getting old, will face the problem of "not being able to see far and near".
At this time, they need to prepare two pairs of glasses with different degrees or choose to wear progressive multifocal glasses
.
Text/Reporter Li Jie
The latest scientific gossip list is released: eating shrimp and fruit together will produce arsenic, myopia will not get presbyopia also--
Can Omicron escape the new crown test? not so easy
The Omicron mutant strain, which has recently set off a "new crown storm" in the world, is rumored to have an "invisible variant" that can evade the new crown test, and infected people cannot be detected
.
Is Omicron really that cunning? The latest issue of the scientific gossip list has been released, covering the five popular health pseudo-knowledges in one fell swoop
.
In addition, eating shrimp and fruit together will produce arsenic? Nuclear heating hot water with radiation? Will I get presbyopia if my myopia is old? Did you fall for these rumors?
.
Is Omicron really that cunning? The latest issue of the scientific gossip list has been released, covering the five popular health pseudo-knowledges in one fell swoop
.
In addition, eating shrimp and fruit together will produce arsenic? Nuclear heating hot water with radiation? Will I get presbyopia if my myopia is old? Did you fall for these rumors?
The monthly "scientific" rumor list is guided by the Beijing Association for Science and Technology, the Beijing Municipal Internet Information Office, and the Capital Internet Association
.
.
gossip
Masks can leave carcinogens
Shake before use
There is a saying circulating on the Internet: "Ethylene oxide", the residue of mask disinfection , is a type of carcinogen.
After opening the package, the mask should be thrown in the air to greatly reduce the ethylene oxide value, otherwise it will cause cancer
.
Is it really?
After opening the package, the mask should be thrown in the air to greatly reduce the ethylene oxide value, otherwise it will cause cancer
.
Is it really?
The truth: Ethylene oxide is an organic compound.
It is indeed a toxic carcinogen.
It can be used to make fungicides and is widely used in washing, pharmaceutical, printing and dyeing industries
.
Most of the medical surgical masks and N95 masks that can be purchased on the market are fumigated and sterilized by ethylene oxide sterilization steam
.
It is indeed a toxic carcinogen.
It can be used to make fungicides and is widely used in washing, pharmaceutical, printing and dyeing industries
.
Most of the medical surgical masks and N95 masks that can be purchased on the market are fumigated and sterilized by ethylene oxide sterilization steam
.
However, mask manufacturers will pack them after sterilization and after the ethylene oxide has evaporated
.
In addition, residual ethylene oxide will be tested, and masks must meet national standards, that is, less than 10 μg/g before they leave the factory
.
.
In addition, residual ethylene oxide will be tested, and masks must meet national standards, that is, less than 10 μg/g before they leave the factory
.
A mask, from packaging, to ethylene oxide sterilization, and then to the analysis time in the factory, before leaving the factory, warehousing, transporting, selling, until it reaches consumers, it will take at least one month, while ethylene oxide The alkane itself is volatile, and it has already met the national standards when it leaves the factory.
Coupled with such a long period of volatilization, the possibility of residual and health hazards is really "minimal"
.
Coupled with such a long period of volatilization, the possibility of residual and health hazards is really "minimal"
.
The ethylene oxide residues of randomly sampled mask samples are all lower than the national standard , which will not pose a threat to the wearer's health
.
When buying masks, you must buy products produced by regular enterprises , and the residues meet national standards and will not pose a threat to the wearer's health
.
.
When buying masks, you must buy products produced by regular enterprises , and the residues meet national standards and will not pose a threat to the wearer's health
.
gossip
Eating shrimp and fruit together produces arsenic
The main reason for the saying that "shrimp and fruit are eaten together will produce arsenic" is that after eating shrimp and fruit at the same time, the arsenic pentoxide contained in shrimp will be combined with the rich vitamins in many fruits.
C undergoes a chemical reaction in the body to form arsenic trioxide, or "arsenic", which can be fatal in toxicity
.
C undergoes a chemical reaction in the body to form arsenic trioxide, or "arsenic", which can be fatal in toxicity
.
Truth: Can eating these two foods at the same time really be so toxic? Actually, no
.
.
Scientists have found through a large number of experiments that seafood such as shrimp and crabs do not contain much arsenic, and the content of arsenic pentoxide per kilogram of shrimp does not exceed 0.
5 mg
.
The dose of arsenic (arsenic trioxide) that causes poisoning is 50mg
.
According to the calculation of the conversion coefficient, if the arsenic contained in the shrimp reaches the maximum limit of 0.
5mg/kg, and there is enough vitamin C to react with it, a person needs to eat at least 40 kg of shrimp to reach the toxic dose
.
5 mg
.
The dose of arsenic (arsenic trioxide) that causes poisoning is 50mg
.
According to the calculation of the conversion coefficient, if the arsenic contained in the shrimp reaches the maximum limit of 0.
5mg/kg, and there is enough vitamin C to react with it, a person needs to eat at least 40 kg of shrimp to reach the toxic dose
.
Just imagine, eating 40 kilograms of shrimp in one go, plus enough fruit, how can a person's stomach hold it? In fact, neither Chinese medicine theory nor modern medical theory has the saying that "food is mutually restrained"
.
.
gossip
Omicron will be "invisible" and the new crown cannot be detected
Fact: The World Health Organization has confirmed at the end of November 2021 that the gold standard for diagnosing the new crown-PCR test can detect the mutant strain of Omicron
.
.
PCR detection generally measures two and three gene sequences of the new coronavirus.
A mutation in the S protein of Omicron, the deletion of amino acids 69-70, will cause the S gene to be undetectable during PCR detection, but in addition Two gene segments were positive
.
Then the result is still positive, and people infected with Omicron can still be tested
.
Not only that, but also through the characteristics of the S gene deletion, it is also possible to quickly detect how many of these positive cases are Omicron variants
.
A mutation in the S protein of Omicron, the deletion of amino acids 69-70, will cause the S gene to be undetectable during PCR detection, but in addition Two gene segments were positive
.
Then the result is still positive, and people infected with Omicron can still be tested
.
Not only that, but also through the characteristics of the S gene deletion, it is also possible to quickly detect how many of these positive cases are Omicron variants
.
The Omicron case in South Africa was also inferred mainly from the S gene deletion
.
.
Recently, British scientists discovered that Omikron actually has two branches.
One branch does not have amino acid deletions at positions 69-70, which is dubbed the "stealth" Omikron
.
But no matter which branch it is, it will not evade PCR detection, but it is different in whether the virus can be determined by PCR detection or not
.
One branch does not have amino acid deletions at positions 69-70, which is dubbed the "stealth" Omikron
.
But no matter which branch it is, it will not evade PCR detection, but it is different in whether the virus can be determined by PCR detection or not
.
gossip
Nuclear heating hot water with radiation
There have been recent rumors that the hot water for nuclear heating has radiation, and if the heating pipes leak, the consequences will be disastrous
.
Is it really so evil?
.
Is it really so evil?
Fact: The heat generated by the nuclear reaction first enters the residents' homes after being converted by layers of media, so there will be no radiation in the heating pipes
.
.
Like thermal power plants, nuclear power plants can also achieve "cogeneration", that is, generate electricity and heat at the same time
.
The heat generated by the nuclear power plant will undergo "multi-stage heat exchange" through the heat exchange station in the plant and the heat exchange station of the heat supply enterprise outside the plant, and finally the heat will be transferred to the end user through the municipal heating pipe network
.
.
The heat generated by the nuclear power plant will undergo "multi-stage heat exchange" through the heat exchange station in the plant and the heat exchange station of the heat supply enterprise outside the plant, and finally the heat will be transferred to the end user through the municipal heating pipe network
.
In the whole process, there are only two modes: "steam heating water" and "water heating water".
There are multiple loops between the nuclear power plant and heating users, and only heat is transferred between each loop
.
Without the exchange of water, no radioactive material can enter the user's heating pipes
.
There are multiple loops between the nuclear power plant and heating users, and only heat is transferred between each loop
.
Without the exchange of water, no radioactive material can enter the user's heating pipes
.
gossip
Myopia will not get presbyopia
Short-sightedness means that it is difficult to see far away, and presbyopia means that it is difficult to see at close range
.
Does this logic really hold?
.
Does this logic really hold?
Fact: Myopia is mostly caused by genetic factors or long-term bad eye habits, which leads to the weakening of the refraction of the cornea and lens, which in turn causes the parallel light to focus in front of the retina, making it difficult to see distant objects
.
.
And presbyopia is due to aging, the lens gradually hardens, the elasticity weakens, and the contraction function of the ciliary muscle decreases, which in turn impairs the function of vision adjustment, making it difficult to see close objects
.
.
Presbyopia is not a disease, but a natural decline in the ability of the human eye to adjust, which is a normal functional degradation
.
Presbyopia usually occurs slowly, starting around age 45, and generally stabilizes by age 65 to 70
.
It's a condition of aging in the body, and it's irresistible
.
.
Presbyopia usually occurs slowly, starting around age 45, and generally stabilizes by age 65 to 70
.
It's a condition of aging in the body, and it's irresistible
.
Therefore, myopia and presbyopia are essentially different from the pathological point of view.
Myopia is caused by refractive error, while presbyopia is caused by lens degeneration and loss of elasticity
.
People who were myopic originally, who developed presbyopia after getting old, will face the problem of "not being able to see far and near".
At this time, they need to prepare two pairs of glasses with different degrees or choose to wear progressive multifocal glasses
.
Text/Reporter Li Jie
Myopia is caused by refractive error, while presbyopia is caused by lens degeneration and loss of elasticity
.
People who were myopic originally, who developed presbyopia after getting old, will face the problem of "not being able to see far and near".
At this time, they need to prepare two pairs of glasses with different degrees or choose to wear progressive multifocal glasses
.
Text/Reporter Li Jie
The latest scientific gossip list is released: eating shrimp and fruit together will produce arsenic, myopia will not get presbyopia also--
Can Omicron escape the new crown test? not so easy
Can Omicron escape the new crown test? not so easy The Omicron mutant strain, which has recently set off a "new crown storm" in the world, is rumored to have an "invisible variant" that can evade the new crown test, and infected people cannot be detected
.
Is Omicron really that cunning? The latest issue of the scientific gossip list has been released, covering the five popular health pseudo-knowledges in one fell swoop
.
In addition, eating shrimp and fruit together will produce arsenic? Nuclear heating hot water with radiation? Will I get presbyopia if my myopia is old? Did you fall for these rumors?
.
Is Omicron really that cunning? The latest issue of the scientific gossip list has been released, covering the five popular health pseudo-knowledges in one fell swoop
.
In addition, eating shrimp and fruit together will produce arsenic? Nuclear heating hot water with radiation? Will I get presbyopia if my myopia is old? Did you fall for these rumors?
The monthly "scientific" rumor list is guided by the Beijing Association for Science and Technology, the Beijing Municipal Internet Information Office, and the Capital Internet Association
.
.
gossip
gossip Masks can leave carcinogens
Masks can leave carcinogens Shake before use
Shake before use There is a saying circulating on the Internet: "Ethylene oxide", the residue of mask disinfection , is a type of carcinogen.
After opening the package, the mask should be thrown in the air to greatly reduce the ethylene oxide value, otherwise it will cause cancer
.
Is it really?
Disinfection Disinfection DisinfectionAfter opening the package, the mask should be thrown in the air to greatly reduce the ethylene oxide value, otherwise it will cause cancer
.
Is it really?
The truth: Ethylene oxide is an organic compound.
It is indeed a toxic carcinogen.
It can be used to make fungicides and is widely used in washing, pharmaceutical, printing and dyeing industries
.
Most of the medical surgical masks and N95 masks that can be purchased on the market are fumigated and sterilized by ethylene oxide sterilization steam
.
It is indeed a toxic carcinogen.
It can be used to make fungicides and is widely used in washing, pharmaceutical, printing and dyeing industries
.
Most of the medical surgical masks and N95 masks that can be purchased on the market are fumigated and sterilized by ethylene oxide sterilization steam
.
However, mask manufacturers will pack them after sterilization and after the ethylene oxide has evaporated
.
In addition, residual ethylene oxide will be tested, and masks must meet national standards, that is, less than 10 μg/g before they leave the factory
.
.
In addition, residual ethylene oxide will be tested, and masks must meet national standards, that is, less than 10 μg/g before they leave the factory
.
A mask, from packaging, to ethylene oxide sterilization, and then to the analysis time in the factory, before leaving the factory, warehousing, transporting, selling, until it reaches consumers, it will take at least one month, while ethylene oxide The alkane itself is volatile, and it has already met the national standards when it leaves the factory.
Coupled with such a long period of volatilization, the possibility of residual and health hazards is really "minimal"
.
healthy healthy healthyCoupled with such a long period of volatilization, the possibility of residual and health hazards is really "minimal"
.
The ethylene oxide residues of randomly sampled mask samples are all lower than the national standard , which will not pose a threat to the wearer's health
.
When buying masks, you must buy products produced by regular enterprises , and the residues meet national standards and will not pose a threat to the wearer's health
.
standard standard standard enterprise enterprise enterprise.
When buying masks, you must buy products produced by regular enterprises , and the residues meet national standards and will not pose a threat to the wearer's health
.
gossip
gossip Eating shrimp and fruit together produces arsenic
Eating shrimp and fruit together produces arsenic The main reason for the saying that "shrimp and fruit are eaten together will produce arsenic" is that after eating shrimp and fruit at the same time, the arsenic pentoxide contained in shrimp will be combined with the rich vitamins in many fruits.
C undergoes a chemical reaction in the body to form arsenic trioxide, or "arsenic", which can be fatal in toxicity
.
C undergoes a chemical reaction in the body to form arsenic trioxide, or "arsenic", which can be fatal in toxicity
.
Truth: Can eating these two foods at the same time really be so toxic? Actually, no
.
.
Scientists have found through a large number of experiments that seafood such as shrimp and crabs do not contain much arsenic, and the content of arsenic pentoxide per kilogram of shrimp does not exceed 0.
5 mg
.
The dose of arsenic (arsenic trioxide) that causes poisoning is 50mg
.
According to the calculation of the conversion coefficient, if the arsenic contained in the shrimp reaches the maximum limit of 0.
5mg/kg, and there is enough vitamin C to react with it, a person needs to eat at least 40 kg of shrimp to reach the toxic dose
.
5 mg
.
The dose of arsenic (arsenic trioxide) that causes poisoning is 50mg
.
According to the calculation of the conversion coefficient, if the arsenic contained in the shrimp reaches the maximum limit of 0.
5mg/kg, and there is enough vitamin C to react with it, a person needs to eat at least 40 kg of shrimp to reach the toxic dose
.
Just imagine, eating 40 kilograms of shrimp in one go, plus enough fruit, how can a person's stomach hold it? In fact, neither Chinese medicine theory nor modern medical theory has the saying that "food is mutually restrained"
.
Traditional Chinese Medicine Traditional Chinese Medicine.
gossip
gossip Omicron will be "invisible" and the new crown cannot be detected
Omicron will be "invisible" and the new crown cannot be detected Fact: The World Health Organization has confirmed at the end of November 2021 that the gold standard for diagnosing the new crown-PCR test can detect the mutant strain of Omicron
.
.
PCR detection generally measures two and three gene sequences of the new coronavirus.
A mutation in the S protein of Omicron, the deletion of amino acids 69-70, will cause the S gene to be undetectable during PCR detection, but in addition Two gene segments were positive
.
Then the result is still positive, and people infected with Omicron can still be tested
.
Not only that, but also through the characteristics of the S gene deletion, it is also possible to quickly detect how many of these positive cases are Omicron variants
.
A mutation in the S protein of Omicron, the deletion of amino acids 69-70, will cause the S gene to be undetectable during PCR detection, but in addition Two gene segments were positive
.
Then the result is still positive, and people infected with Omicron can still be tested
.
Not only that, but also through the characteristics of the S gene deletion, it is also possible to quickly detect how many of these positive cases are Omicron variants
.
The Omicron case in South Africa was also inferred mainly from the S gene deletion
.
.
Recently, British scientists discovered that Omikron actually has two branches.
One branch does not have amino acid deletions at positions 69-70, which is dubbed the "stealth" Omikron
.
But no matter which branch it is, it will not evade PCR detection, but it is different in whether the virus can be determined by PCR detection or not
.
One branch does not have amino acid deletions at positions 69-70, which is dubbed the "stealth" Omikron
.
But no matter which branch it is, it will not evade PCR detection, but it is different in whether the virus can be determined by PCR detection or not
.
gossip
gossip Nuclear heating hot water with radiation
Nuclear heating hot water with radiation There have been recent rumors that the hot water for nuclear heating has radiation, and if the heating pipes leak, the consequences will be disastrous
.
Is it really so evil?
.
Is it really so evil?
Fact: The heat generated by the nuclear reaction first enters the residents' homes after being converted by layers of media, so there will be no radiation in the heating pipes
.
.
Like thermal power plants, nuclear power plants can also achieve "cogeneration", that is, generate electricity and heat at the same time
.
The heat generated by the nuclear power plant will undergo "multi-stage heat exchange" through the heat exchange station in the plant and the heat exchange station of the heat supply enterprise outside the plant, and finally the heat will be transferred to the end user through the municipal heating pipe network
.
.
The heat generated by the nuclear power plant will undergo "multi-stage heat exchange" through the heat exchange station in the plant and the heat exchange station of the heat supply enterprise outside the plant, and finally the heat will be transferred to the end user through the municipal heating pipe network
.
In the whole process, there are only two modes: "steam heating water" and "water heating water".
There are multiple loops between the nuclear power plant and heating users, and only heat is transferred between each loop
.
Without the exchange of water, no radioactive material can enter the user's heating pipes
.
There are multiple loops between the nuclear power plant and heating users, and only heat is transferred between each loop
.
Without the exchange of water, no radioactive material can enter the user's heating pipes
.
gossip
gossip Myopia will not get presbyopia
Myopia will not get presbyopia Short-sightedness means that it is difficult to see far away, and presbyopia means that it is difficult to see at close range
.
Does this logic really hold?
.
Does this logic really hold?
Fact: Myopia is mostly caused by genetic factors or long-term bad eye habits, which leads to the weakening of the refraction of the cornea and lens, which in turn causes the parallel light to focus in front of the retina, making it difficult to see distant objects
.
.
And presbyopia is due to aging, the lens gradually hardens, the elasticity weakens, and the contraction function of the ciliary muscle decreases, which in turn impairs the function of vision adjustment, making it difficult to see close objects
.
.
Presbyopia is not a disease, but a natural decline in the ability of the human eye to adjust, which is a normal functional degradation
.
Presbyopia usually occurs slowly, starting around age 45, and generally stabilizes by age 65 to 70
.
It's a condition of aging in the body, and it's irresistible
.
.
Presbyopia usually occurs slowly, starting around age 45, and generally stabilizes by age 65 to 70
.
It's a condition of aging in the body, and it's irresistible
.
Therefore, myopia and presbyopia are essentially different from the pathological point of view.
Myopia is caused by refractive error, while presbyopia is caused by lens degeneration and loss of elasticity
.
People who were myopic originally, who developed presbyopia after getting old, will face the problem of "not being able to see far and near".
At this time, they need to prepare two pairs of glasses with different degrees or choose to wear progressive multifocal glasses
.
Text/Reporter Li Jie
Myopia is caused by refractive error, while presbyopia is caused by lens degeneration and loss of elasticity
.
People who were myopic originally, who developed presbyopia after getting old, will face the problem of "not being able to see far and near".
At this time, they need to prepare two pairs of glasses with different degrees or choose to wear progressive multifocal glasses
.
Text/Reporter Li Jie
