A new study published in the US “Science†magazine shows that human noses can detect 1 trillion different odors, far exceeding what we previously considered 10,000.
Researchers at Rockefeller University in New York City, in order to understand how many different odors human noses can smell, they used 128 odor molecules to create new odors, and then let 26 subjects sniff 3 vials each time, among them The two vials smelled exactly the same and the subject needed to smell the bottle with a different smell. The study found that as long as the odor component overlap is less than 50%, the subject can generally be successfully distinguished. Based on this result, the researchers calculated that humans can theoretically smell at least 1 trillion odors.
According to co-author Dr. Leslie Vosshall, people have always believed that animals have a much better sense of smell than humans. In fact, human olfactory abilities are much stronger than expected and cannot be underestimated. The smell of animals on the surface is better than humans because they invest more brains. And humans only use a small part of their sense of smell.
Stephen Liberles, a professor at Harvard Medical School, said: "The nose has a lot of olfactory receptors, which means that the human sense of smell may be stronger than estimated by this study. This study still has a long way to go."
A spinneret is a device used to extrude a polymer solution or polymer melt to form fibers.
[1] Streams of viscous polymer exit via the spinneret into air or liquid leading to a phase inversion which allows the polymer to solidify. The individual polymer chains tend to align in the fiber because of viscous flow.
[2] This airstream liquid-to-fiber formation process is similar to the production process for cotton candy. The fiber production process is generally referred to as "spinning". Depending on the type of spinneret used, either solid or hollow fibers can be formed.[1] Spinnerets are also used for electrospinning and electrospraying applications. They are sometimes called coaxial needles, or coaxial emitters.
Pp Spunbond Spinneret,Pp Nonwoven Spunbond Spinneret,Spunbonded Nonwoven Spinnerets,Nonwoven Spinneret Components
Changzhou Jier Precision Machinery Manufacturing Co., Ltd. , https://www.jier-spinneret.com