Credit: Brian Jay Trump
How to cut the onion by cutting onions has led to a practical advice to reduce the spray of a new discovery to eliminate aerosols found in the air: an onion has been slowly cut off with a sharp blade or coat before cutting.
Past research has already pointed out that the chemicals called propertithic SOSide pushes the chefs towards tears, but this study explains its basic mechanics how sulfur compounds reach the eyes.
Modern research used high -speed cameras and a simple computer model to show that pressing a knife against onions puts pressure on the cells in its layers.
Each layer of onion is surrounded by a top and bottom layer of the skin, and when the knife enters the top skin, the painting inside the layer forches the fog of small droplets at an estimated rate of 5 to 40 meters per second. It was surprising because professional chefs – who were filmed and measured their deductions – slices at a rate of just 1 meter per second.
“We found that the pace of dimming is much higher than the blade bites,” said senior author of the article at the College of Agriculture and Life Sciences and professor of biological and environmental engineering.
Zaxwan Woo is the first author of this study published in PhD The action of the National Academy of Science.
Jung said onions are known to port the pathogens, and tips to restrict spray can help prevent bacteria from spreading around the kitchen. In 2024, the disease control centers investigated the outbreak of E. coli -linked E. coli, which was offered in McDonald’s, causing 104 cases of illness and one death in 14 states. Jung said that onion exemptions can exit the skin at a speed of up to 40 meters per second, while human cough can only pull the droplets at speeds of up to 20 meters per second to spread diseases.
Jung said, “Suppose you have pathogens on the above layer of onions.” By cutting this onion, it can penetrate the pathogenesis into the droplets where they can spread again. “
More information:
Zexwan Wu Et El, drop from onion cutting, The action of the National Academy of Science (2025) DOI: 10.1073/pnas.2512779122
Provided by Cornell University
Reference: High-speed onions: Cutting techniques and blade sophistication affect the spray of droplets, the study shows (2025, October 7) October 8, 2025 https://phys.org/news/2025-10-Union-mist-mist-technique-blade.html.
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