Today’s curious shrimp knowledge sharing,
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·Why do the train numbers change along the way?
Different train numbers can actually lead to the same destination via different routes. Have you ever encountered a situation where the train number suddenly changed halfway through the train ride?
In fact, the number of trains changes during the journey because the number of passenger trains is closely related to "upbound and downbound". The upbound trains are even numbers, such as G326 from Fuzhou to Beijing South, and the downbound trains are odd numbers, such as G197 from Beijing South to Fuzhou.
According to the regulations of the railway department, the so-called uplink refers to the direction into Beijing or from the branch line to the main line; the so-called downlink refers to the direction leaving Beijing or from the main line to the branch line. When the train reaches a line intersection, or when the direction of travel changes, the number of the same train will change accordingly.
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· Baby's anxiety?
When in a strange environment, babies often cry because the strangeness of the environment makes them feel fearful and stressed.
For example, babies between 6 and 12 months old can be wary or fearful of strangers, especially if the stranger is a man, which is called stranger anxiety. However, they were less anxious if the stranger was another baby, and they were less anxious if the mother was friendly to the stranger.
When separated from their mother, babies aged 6 to 15 months will show reactions such as fear, clinginess, and crying, which is separation anxiety .
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· What are the dangers of catkins?
The hazards of catkins are specifically as follows: catkins can spread germs , and can also stimulate the human body and cause allergies and inflammation, thus posing a threat to human health.
During the willow flowering season in April and May, you can often see clusters of catkins whether indoors or outdoors, in offices or at home. According to statistics, during the two-month flowering period, each willow can produce 25kg of catkins.
These catkins floating in the air can account for 2% to 10% of particulate matter in the air. These hairs carry a large amount of dust and germs in the dust, which can cause people to cough, eye inflammation and other various allergic symptoms.
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· Why do fruits and vegetables grow hair?
In life, if fruits and vegetables are left uneaten for a long time, they will grow hair. Even if they are placed in the refrigerator, they will not survive. So why is this?
In fact, the culprit that makes fruits and vegetables grow hair is called " Botrytis ". It is a type of fungus that exists in large quantities in the air. It can use a type of molecule called small RNA to enter plant cells , thereby preventing the immune response of fruits and vegetables, quickly overcoming the line of defense, and then invading fruits and vegetables.
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· Where does the metallic smell come from?
In fact, pure metal itself has no smell. The structure of metals means that they do not evaporate easily into gases and therefore do not become part of odor molecules.
Scientists studied the odor of iron products and found that after human skin comes into contact with iron products, the interaction between lipids and iron on the skin can produce a small amount of small molecule carbonyl compounds, which are the source of the odor.
In addition, because the composition and proportion of organic matter in everyone's sebum are different, and the composition of skin secretions and surface microbiota of everyone at different ages is also different, so the metallic smell that everyone smells after touching metal is also different.
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