It's perfect to describe a flower skater.
But are they born to "turn"?
It is said that hairline is the last stubbornness of every middle-aged man.
So can the online celebrity black sesame pill really work?
There were many scientific rumors in February.
There are also social hotspots about the Winter Olympics and health.
1
The colder the winter Olympics, the better?
Myth: Winter Olympics is a competition between ice athletes and snowfield athletes. In order to ensure the quality of ice and snow in the stadium and make the game go smoothly, the colder the weather, the better.
Truth: Low temperature will not only bring physical cold, but also have a practical impact on the performance and safety of the competition, athletes' competition equipment and venue facilities.
For example, sledge, snowmobile and steel snowmobile projects, the ideal weather is sunny at 0 or below. The "snow" on the track of sleigh, snowmobile and steel snowmobile is actually artificial ice, with a thickness of more than 5 cm and a temperature of -2 to -3.
Ski jumping is recognized as one of the competitions in which the results are most easily affected by the weather. The temperature of minus 20 degrees or above zero degrees is not suitable for the competition. If the temperature is low, athletes' limbs will be stiff. When the temperature is below -20 or the weather continues to be extremely cold, the snow quality is excellent, and even a thick ice crystal layer appears, so athletes are prone to fall when landing. There is a similar situation in freestyle skiing. Too low temperature will have a great impact on athletes' physical fitness and technical movements, and increase the risk of athletes' injuries.
If the temperature is too high, it may cause the stadium not to snow, and it is impossible to make snow if the temperature is too high. In addition, high temperature will also bring certain risks to the game. For example, when the temperature is high in ski jumping, the snow and humidity in the competition venue will increase and soften, which will easily lead to injuries to athletes. Therefore, in order to meet the conditions of related competitions, the average temperature in February is below 0, which is one of the core indicators for the IOC to choose the host city.
2
Flower slippery is born to turn around and not faint?
Myth: Flower skaters spin nearly 100 times per game on average. It is a gift that they can turn, and ordinary people will faint after two turns.
Truth: The reason why flower skaters don't turn dizzy is because they are constantly training, and they are not born dizzy.
The vestibular system in human ears is the perceptual system responsible for the sense of balance and space, and it is also an important structural basis to ensure people's ability to maintain coordination and balance in complex sports.
When a person rotates in the same place, the lymph in the semicircular canal of vestibular system will rotate at the same speed. At this time, a special receptor "ampulla cap" in the human body receives this information and reflects it to the brain, and the brain will know that this person is circling. When the body suddenly stops rotating, the displacement of endolymph usually stops after 3 seconds, but it takes 25-30 seconds for the ampulla cap to return to its original state. So when people stop turning, there will be a feeling of turning in the opposite direction.
Through long-term training, flower skaters gradually get used to the spatial stimulation of the head and become "slow" to these stimuli, thus overcoming the natural reaction of the human body and adapting to rotation, thus successfully achieving high-level posture and balance control.
three
Primates are the most suitable
Heterogeneous organ donor?
Myth: In the field of xenotransplantation, primates closest to humans are the most suitable organ donors.
Truth: In fact, the "close relatives" of primates are not ideal organ transplant donors for human beings.
There are many problems in listing primates as organ donors, including technology and ethics. For example, most primate species are small in size, and their organ performance and size cannot meet the needs of human metabolism; The reproduction rate of primates is low (one generation every ten years on average), while the larger orangutans and baboons are in an endangered state, which is difficult to meet the human demand for organ transplantation. They may also carry some viruses that are easily infected by humans, such as monkey immunodeficiency virus and Ebola virus. Once these organs are transplanted into human body, they may produce more harmful viruses after recombination.
Different from primates, pigs are similar in organ size to humans, which has the advantages of lower risk of infectious diseases and relatively abundant quantity. From the performance parameters, the body temperature of pigs and people is 36 -37, and the heart size, pipeline distribution, power output and even heart rate (the heart rate of people is 60- 100 beats/min, and that of pigs is 55-60 beats/min) are similar. The foreseeable range of organ transplantation includes cornea, skin, islet, joint, tendon, ligament, kidney, heart and liver. At present, in the medical field, the porcine heart valve implanted with human cells has been used for the treatment of patients, and the transplantation of porcine ligaments and tendons has matured, so it is considered to be the best choice for xenotransplantation at this stage.
four
Is dry eye a lack of water in the eyes?
Myth: As the name implies, dry eye is "lack of water in the eyes", so it is good to drop eye drops frequently.
Truth: If you have symptoms of dry eye, you must go to a regular hospital. Simply using eye drops to "replenish water" can not only solve the problem, but also delay treatment, leading to aggravation and even blindness.
Dry eye is a kind of ocular surface damage and discomfort caused by the imbalance of tear film, which is often manifested as dryness, foreign body sensation, burning sensation, red eye itching, blurred vision, pain, photophobia and tears, and even corneal damage and even visual damage in severe cases.
Corneal moisture depends on tear film, and the outermost layer of tear film is covered with a layer of "oil" secreted by meibomian gland to prevent water from evaporating too fast. This layer of oil is eyelid fat. If the gland cannot secrete oil, it will cause dry eye with meibomian gland dysfunction. More than 80% patients with dry eye are accompanied by meibomian gland dysfunction.
For "oil-deficient" dry eye syndrome, blindly using eye drops to "replenish water" not only has little effect, but also may aggravate the condition by destroying lipid layer. At the same time, chemicals such as preservatives in eye drops can also damage corneal and conjunctival cells on the surface of the eye. At present, the traditional treatment methods in regular hospitals are hot compress fumigation, meibomian gland massage, meibomian margin cleaning and artificial tears to relieve the discomfort of dry eye.
five
Can eating black sesame pills prevent hair loss?
Myth: Online celebrity Black Sesame Pills can "nourish black with black" and save hairline.
Truth: The black color of black sesame comes from a kind of flavonoids, but the amino acid derivatives of melanocytes in human body are not the same as the pigments in black sesame, so even eating black sesame can not help the production of melanin in the body and reduce white hair.
Theoretically, vitamin B2 in black sesame can prevent seborrheic dermatitis, but to meet the daily demand of adult women 1.2 mg of vitamin B2, it is necessary to eat more than 500 grams, and more men. Not recommended by merchants or online celebrities. Just eat a little to achieve the desired effect.
In addition, black sesame is an oil crop, and its oil content can usually reach more than half of its weight. At present, seborrheic alopecia is the main hair loss, and its skin secretes a lot of oil, so fungi are easy to reproduce and cause hair follicle damage. Eating too much black sesame pills may also aggravate oil secretion, cause scalp itching and erythema, and cause the burden of weight and blood lipids.
six
The children put lemons by the bed,
Can help you grow taller?
Myth: Lemon will produce a special fragrance, which will make children sleep better. Children who sleep deeply grow very fast.
Truth: There is no scientific basis for saying that lemons help children grow taller. Whether a child can grow taller is not only influenced by heredity, but also related to three factors: sleep, nutrition and exercise.
Sleep does play an important role in height and intellectual development. However, most children do not have the problem of falling asleep. If they do, it is unrealistic to speed up their sleep by smelling lemons, because lemons don't help them sleep, and not everyone likes the taste of lemons.
In addition to genetic factors, children's height is also related to the external environment, mainly including sleep, exercise, diet, mood and so on. Parents can help their children grow taller by maintaining adequate regular sleep, exercise, ensuring adequate nutrition and maintaining a good mood. In short, we must use scientific methods to help children grow taller and consult regular hospitals when necessary.
seven
Are home-brewed and pure grain-brewed wines healthier?
Myth: Pure grain-brewed wine is the essence of grain, while home-brewed wine and pure grain-brewed wine are healthier.
Truth: The health effects of alcohol come from alcohol and other fusel alcohol. In fact, whether it is "pure grain brewing" or "edible alcohol blending", the alcohol inside is fermented by grain. As long as it is alcohol, it is also harmful to health.
In addition, many people admire "self-brewing" and "indigenous brewing", and their fermentation process lacks good control, and there is often no standardized distillation operation in the follow-up, so the fusel content is usually high. Some fusel alcohol has a greater impact on health than alcohol, which is why drinking "homemade wine" and "local wine" is sometimes more "top-notch". So from a health point of view, it is recommended not to drink alcohol. People who make their own wine should be more careful.
eight
Can tableware be disinfected with boiling water?
Myth: Remember to iron the chopsticks with boiling water before going out to eat, so that they can be disinfected and used safely.
Truth: Boil the bowl with boiling water before eating. Due to the lack of heating temperature and time, most pathogenic microorganisms cannot be guaranteed to be killed. Its function is to wash down floating dust at most for psychological comfort.
In order to achieve the expected effect, high temperature disinfection must meet two conditions at the same time: one is temperature and the other is time. For example, it takes 5- 10 minutes in hot water and 2-5 minutes in boiling water to kill pathogenic Escherichia coli, typhoid Bacillus, Vibrio cholerae and other common bacterial propagules that can cause diarrhea. Infant diarrhea virus needs to be treated with 100 for 5 minutes to be inactivated; Hepatitis A virus 56 can survive for 30 minutes, and hepatitis B virus 60 can survive for 4 hours. It takes 1 min to destroy their infectivity. However, to kill other microorganisms with stronger heat resistance requires higher temperature and longer time.
However, in order to avoid burns, hot water and hot tea provided by general restaurants are mostly around 70 -80. If you pour water into cold tableware, the temperature will drop even lower. In addition, when many people iron tableware, it takes more than ten seconds at most, which is far from enough time for action.
When eating, people need to use chopsticks and spoons to share meals, or use packaged sterilized tableware instead of boiled water. Tableware can be used safely as long as it goes through a strict disinfection and sterilization process.
end
Read more
Please see the first list of scientific rumors in the Year of the Tiger! May you not be fooled by pseudoscience in the new year!
Nautilus studio
Author Gao Yang
Picture Oriental IC Li Mingxi
Editor Bryce