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An international team of scientists has experimentally shown that supercooled water can exist as two immiscible liquids with different densities. The results of the study were published in the journal Science, cited by Darik.
Water is one of the most common substances on earth. At the same time, it has unique physical properties: when pressure and temperature change, water behaves differently from other liquids. Anomalies of the phase states of water have been studied by physicists and chemists around the world for many years.
Everyone is familiar with the normal liquid state of water at normal temperatures. Researchers from the United States, Canada, Sweden and South Korea, led by Nicholas Giowambattista, a professor at New York University and head of the physics department at Brooklyn College, have experimentally shown that at minus 63 degrees Celsius, water can exist at low pressures. low-density and high-pressure liquid, such as high-density liquid.
These two liquids have radically different properties: they differ in density by 20 percent and, under the right conditions, they don’t mix with each other like oil and water.
Computer simulations were conducted at universities in the United States and Canada, and the experiments themselves were conducted at Stockholm University, Pohang University of Science and Technology in South Korea, as well as PAL-XFEL accelerators in Korea and SLAC in California.
“The question remains how the presence of these two liquid states of water can affect the behavior of aqueous solutions in general and biomolecules in particular in the aquatic environment”, says Giovambatista. “This motivates us to continue investigating.”
The authors believe that the unusual characteristics of the phase behavior of water, which they have demonstrated, will inevitably require corrections in numerous scientific and engineering applications in areas such as cryopreservation and cryobiology.
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