Navigation Links
Antifreeze proteins can stop ice melting, Queen's professors find

KINGSTON, ON The same antifreeze proteins that keep organisms from freezing in cold environments can also prevent ice from melting at warmer temperatures, according to a new Queen's University study.

The study presents the first direct measurements of the superheating of ice crystals in antifreeze protein solutions. Superheated ice crystals can be stabilized above the melting point for hours, at a maximum temperature of about +0.5 degree Celsius.

"You can hold the ice crystal at +0.5 C for an hour and it just doesn't melt. That's highly unusual. Without the antifreeze protein, there is no way that can happen," says Queen's biochemistry professor Peter Davies.

The results were published this week in the journal Proceedings of the National Academy of Sciences.

The new study has implications for understanding this process in nature, and also for understanding the recrystallization of ice. Food stored in freezers is subject to recrystallization, where small ice crystals shrink and large ones grow, damaging the food.

"This particular discovery helps explain why these proteins are so good at stopping the recrystallization process. You have a double whammy an effect where the ice crystals are stopped from growing, while they are also stopped from melting. I don't think people realized this up until now," says Dr. Davies.

Twenty years ago, researchers first proposed that antifreeze proteins can create superheating by suppressing melting at temperatures higher than the equilibrium melting point.


Contact: Michael Onesi
613-533-6000 x77513
Queen's University

Page: 1

Related biology news :

1. Scientists isolate new antifreeze molecule in Alaska beetle
2. Bacteria-killing proteins cover blood type blind spot
3. Argonautes: A big turn-off for proteins
4. Membrane-coat proteins: Bacteria have them too
5. Researchers identify proteins that might contribute to memory loss and Alzheimers disease
6. Molecular chaperone keeps bacterial proteins from slow-dancing to destruction
7. BBS proteins shown to run an export business that protects cilia
8. Saliva proteins change as women age
9. Largest-ever database for liver proteins may lead to treatments for hepatitis
10. Escaped proteins add to hearing loss in elderly, UF researchers find
11. University of the Basque Country study on proteins related to Alzheimers
Post Your Comments:
(Date:10/4/2017)... Oct. 4, 2017  GCE Solutions, a global clinical research organization ... document anonymization solution on October 4, 2017. Shadow is designed to ... comply with policy 0070 of the European Medicines Agency (EMA) in ... ... ...
(Date:7/20/2017)... , July 20, 2017 Delta (NYSE: DAL ) ... any Delta aircraft at Reagan Washington National Airport (DCA). ... Delta launches biometrics to board ... Delta,s biometric boarding ... Club is now integrated into the boarding process to allow eligible ...
(Date:6/14/2017)... June 15, 2017  IBM (NYSE: IBM ) is introducing ... event dedicated to developing collaboration between startups and global businesses, ... 15-17. During the event, nine startups will showcase the solutions ... various industries. France ... market, with a 30 percent increase in the number of ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... Disappearing forests and increased emissions are the ... million people each year. Especially those living in larger cities are affected by air ... one of the most pollution-affected countries globally - decided to take action. , “I ...
(Date:10/11/2017)... ... October 11, 2017 , ... Singh Biotechnology today announced ... to SBT-100, its novel anti-STAT3 (Signal Transducer and Activator of Transcription 3) B ... to cross the cell membrane and bind intracellular STAT3 and inhibit its function. ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... company advancing targeted antibody-drug conjugate (ADC) therapeutics, today confirmed licensing rights that ... Polymerized Liposomal Nanoparticle), a technology developed in collaboration with Children’s Hospital Los ...
(Date:10/10/2017)... ... October 10, 2017 , ... Dr. Bob Harman, founder and CEO of ... Club. The event entitled “Stem Cells and Their Regenerative Powers,” was ... Dr. Harman, DVM, MPVM was joined by two human doctors: Peter B. Hanson, M.D., ...
Breaking Biology Technology: