News tagged with antifreeze
Building a beetle antifreeze
Animals and plants have evolved all sorts of chemical tricks that allow them to colonize extreme environments. For species that call Antarctica or the Arctic home, surviving sub-zero temperatures is an essential ...
Mar 02, 2012 |
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Antarctic lake could reveal evolution, new life: scientists
Russian scientists said Thursday a probe to a pristine lake deep under the ice of Antarctica could bring revelations on the evolution of the planet Earth and possibly even new life forms.
Space & Earth / Earth Sciences
Feb 09, 2012 |
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Scientists cautious over Russia's Antarctic lake drilling
Experts on Monday raised questions over the scientific benefit and environmental impact of Russia's feat in drilling into a virgin lake under Antarctica's icesheet. ...
Space & Earth / Earth Sciences
Feb 06, 2012 |
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Anti-freeze poses threat to pets, experts warn
Ethylene glycol, a major component of anti-freeze used in car radiators to prevent freezing during winter, has been identified by UCD veterinary pathologists as the cause of a recent outbreak of cat deaths.
Jan 06, 2012 |
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A simple compound with surprising antifreeze properties
A chemical compound used to stabilize particles in suspension has proved capable of controlling the growth of ice crystals. This finding was made by CNRS/Saint-Gobain researchers in France. Surprisingly, the ...
Oct 25, 2011 |
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Finding may end a 30-year scientific debate
A chance observation by a Queen's researcher might have ended a decades-old debate about the precise way antifreeze proteins (AFP) bind to the surface of ice crystals.
Apr 11, 2011 |
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Neutron science explains mystery of how Arctic fish's antifreeze proteins work
Neutron scientists have discovered for the first time how 'antifreeze' in arctic fish blood kicks in to keep them alive in subzero conditions. The results could provide benefits for areas as diverse as cryosurgery, ...
Apr 07, 2011 |
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Researchers show how 1 gene becomes 2 (with different functions)
Researchers report that they are the first to show in molecular detail how one gene evolved two competing functions that eventually split up – via gene duplication – to pursue their separate destinies.
Jan 12, 2011 |
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Why fish don't freeze in the Arctic Ocean
German researchers have discovered how natural antifreeze works to protect fish in the icy waters of the Arctic Ocean from freezing to death. They were able to observe that an antifreeze protein in the fish's ...
Aug 25, 2010 |
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Antifreeze proteins can stop ice melt, new study finds
The same antifreeze proteins that keep organisms from freezing in cold environments also can prevent ice from melting at warmer temperatures, according to a new Ohio University and Queen's University study ...
Mar 01, 2010 |
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Proline Repeats in Protein Help Grow Tooth Enamel (w/ Podcast)
(PhysOrg.com) -- A simple amino acid that is repeated in the center of proteins found in tooth enamel makes teeth stronger and more resilient, according to new research at the University of Illinois at Chicago.
Medicine & Health / Medical research
Dec 21, 2009 |
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Scientists isolate new antifreeze molecule in Alaska beetle
Scientists have identified a novel antifreeze molecule in a freeze-tolerant Alaska beetle able to survive temperatures below minus 100 degrees Fahrenheit. Unlike all previously described biological antifreezes that contain ...
Dec 14, 2009 |
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Ice Cold: Cooler Than Being Cool
(PhysOrg.com) -- Water expands when it freezes. Anyone who has ever left a can of soda or bottle of water in the freezer too long has witnessed this first hand. So how do plants and animals survive severe ...
Nov 24, 2009 |
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Panama: More tainted medicine in 1,155 bottles
(AP) -- The death toll from contaminated medicine sold three years ago in Panama could be higher than previously believed after 1,155 bottles of tested positive for a chemical commonly found in antifreeze and brake fluid, ...
Sep 18, 2009 |
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FDA: Electronic cigarettes contain toxic chemicals
(AP) -- Federal health officials said Wednesday they have found cancer-causing ingredients in electronic cigarettes, despite manufacturers' claims the products are safer than tobacco cigarettes.
Jul 23, 2009 |
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Antifreeze
Antifreeze is a freeze preventive used in internal combustion engines and other heat transfer applications, such as HVAC chillers and solar water heaters.
The purpose of antifreeze is to prevent a rigid enclosure from undergoing catastrophic deformation due to expansion when water turns to ice. Antifreezes are chemical compounds added to water to reduce the freezing point of the mixture below the lowest temperature that the system is likely to encounter. Either the additive or the mixture may be referred to as antifreeze.
An antifreeze mixture achieves freezing point depression for a cold environment and also achieves boiling point elevation to enable higher liquid temperatures. This is described as the action of a colligative agent, which can properly be referred to as both antifreeze and "anti-boil" when used for both properties. Careful selection of an antifreeze can enable a wide temperature range in which the mixture remains in the liquid phase, which is critical to efficient heat transfer and the proper functioning of heat exchangers.
For more information about Antifreeze, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
