Can wearing a mask for a long time cause pulmonary nodules to increase?
Some people say that the melt-blown cloth in the middle layer of the mask is made of petroleum products, and the fine particles in it will enter the human lungs through the respiratory tract, and long-term wearing can cause human lung nodules to increase. Is it really? In fact, wearing a mask during the normal use period will not produce fine particles, nor will it cause the increase of human lung nodules. In addition to textile materials such as cotton, wool, hemp, silk, and regenerated cellulose fibers, many synthetic fibers, including meltblown cloth, are made from petroleum-based materials. As the main petroleum-based material, polypropylene has a wide range of applications. Among them, the melt-blown cloth used for making masks is a superfine fiber non-woven material processed from polypropylene polymer materials. After the polymer material is processed into a meltblown cloth, it has a certain strength and very good filtration performance. As long as it is not exposed to the sun and does not exceed the service life, it will not produce fine particles.
Why can’t a cat’s whiskers be shaved?
If the cat’s beard is cut off, it will become stupid, just like a blind man walking without a cane. If it is taken to a strange place at this time, it will not be able to tell the direction and distance. This is because the cat’s beard not only plays a decorative role, but also a unique sensory organ. The distance between the two ends of a cat’s beard is equal to the width of the cat’s body, like a “ruler”, which can help it understand its own position, relative position to objects, and the size of the entrance and exit. The roots of the cat’s whiskers are rich in sensitive sensory nerves, allowing it to detect extremely slight movements, and even feel the weak airflow and wind direction.
Why does bamboo grow so fast?
Bamboo is one of the plants with the fastest growth rate in the world. For example, when the growth rate of bamboo is the fastest, it can reach 114.5 cm per day. After 8 years of continuous research, many research teams from China and the United States have clarified the cytological basis of the rapid growth of moso bamboo and its potential physiological and molecular regulation mechanisms, and revealed the synergistic mechanism of environmental factors-genes-the rapid growth of bamboo nodes. Solved the mystery of the rapid growth of moso bamboo. The researchers analyzed the moso bamboo clusters in 17 main production areas of moso bamboo in China, and found that the 18th internode of moso bamboo from bottom to top is a representative internode for the high growth of moso bamboo shoots. During the rapid growth of moso bamboo, there are as many as 40 internodes elongating to different degrees at the same time. In addition, the internode growth of Moso bamboo is modular growth, and the growing internodes include cell division zone (up to 2 cm), cell elongation zone (up to 12 cm) and secondary cell wall thickening zone. These growth nodes can extend up to 11.8 cm per day, produce about 570 million cells, and deposit a large amount of lignin and cellulose at the same time, far exceeding the growth of other plants.
What does “variety of varieties” refer to?
”Wuhua Bamen” originally refers to “Five Flowers Array” and “Eight Gates Array”, which are the names of formations in ancient tactics. “Five Flowers” means “Five Flowers Array”, that is, the array of five elements; “Eight Gates” means “Eight Gates Array”, also known as the Eight Diagrams Array, which is arranged according to the order of the Eight Diagrams, and the Eight Eight Diagrams can become sixty-four hexagrams , often making the opponent’s army fall into confusion. Later generations also used “variety of varieties” as a metaphor for the code words of all walks of life. The “five flowers” here refer to: golden chrysanthemum-a tea seller; kapok-a doctor who heals people; “Eight Gates” refers to: one door scarf – fortune teller; two door skin – herbal medicine seller; three door color – juggler; four door hanging – Jianghu busker; Book reviewers; Liumentuan – street singers; Qimendiao – people who set up tents and tie paper; Bamenchao – singers on high platforms.
Does not getting enough sleep lead to selfishness?
A study showed that people behaved less altruistically when they were sleep deprived. The scientists believe this effect is linked to reduced activity in prosocial cognitive networks in the brain. The paper designed 3 experiments. The first experiment was to let the volunteers receive the altruism questionnaire after a normal night’s sleep, and use instruments to monitor brain activity, and then deprive the volunteers of the whole night’s sleep, and repeat the above experiment. In the second experiment, volunteers recorded their sleep duration and quality, and were then given altruism questionnaires. These two experiments found that after sleep reduction, the willingness of volunteers to help others is reduced, and the activity of prosocial cognitive network in the brain will be suppressed. A third experiment looked at social giving data and found that donation activity dropped by 10% in the weeks before and after the U.S. daylight saving time change. The authors argue that helping others is a central, fundamental trait of being human, and that lack of sleep disrupts the basic fabric of human society.
Can vegetarians avoid fatty liver?
Some people think that since eating more meat can easily lead to fatty liver, then only vegetarians can avoid suffering from fatty liver. In fact, eating too much meat may indeed lead to fatty liver, but not only eating a lot of meat will cause fatty liver, and eating vegetarian food may also lead to fatty liver. It’s just that, contrary to overnutrition fatty liver, long-term malnutrition and lack of protein intake lead to “nutrition-deficiency fatty liver”. Long-term vegetarians may suffer from lack of protein in the body due to unbalanced nutrition, because the liver needs protein to help transport fat, so long-term vegetarian diets will cause obstacles in the transfer of fat, causing fat to accumulate in the liver. In addition, compared to people who eat a balanced diet, vegetarians tend to feel hungry more easily. The human digestive system stimulates the body to consume more carbohydrates to increase satiety. These carbohydrates are not low in calories and can be converted into fat and stored in the liver, thus increasing the risk of fatty liver in vegetarians. In addition, excessive drinking may also lead to alcoholic fatty liver.