The study found that as people grow older, people are less likely to yawn when others yawn. Yawning when others yawn, this phenomenon is called infectious yawning. American scientists have said that the link between infectious yawning and age is stronger than people’s energy levels. Hot melt adhesive for carton sealing
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In addition, patients with autism and schizophrenia are said to be less likely to be yawned. To help treat these mental illnesses, researchers are currently investigating infectious yawning. In this study, the researchers recruited 328 participants and let them watch the video of people yawning separately and record the number of yawning participants. Overall, 68% yawned. Among them, the proportion of participants under 25 who yawned was about 82%, 60% between 25 and 49, and 41% over 50.
Dr. Elizabeth Cirulli, the leader of the study, said she did not know why contagious yawning would decrease with age, and the overwhelming majority of people's reactions could not be explained.
Professor Robert R Provine of the University of Maryland believes that this study is unique because it shows that there is a certain link between the first ageing and infectious yawning. The results of the study can also help understand why laughter and cough can be transmitted.
He added: "These contagious behaviors remind us that we often blindly congregate rather than rationally control our own behavior."
Hot-melt adhesive sealing is to use a hot-melt machine to melt the hot-melt adhesive into a liquid, and then send it to the surface of the carton through the throat and spray gun of the hot-melt machine. After the hot-melt adhesive is cooled, the bonding is completed. It can meet various requirements of carton sealing, and overcome the defects existing in the traditional carton sealing form.
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