Navigation Links
Antifreeze proteins can stop ice melting, Queen's professors find
Date:3/3/2010

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
michael.onesi@queensu.ca
613-533-6000 x77513
Queen's University
Source:Eurekalert

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:
*Name:
*Comment:
*Email:
(Date:6/20/2016)... , June 20, 2016 Securus ... justice technology solutions for public safety, investigation, corrections ... the prisons involved, it has secured the final ... (DOC) facilities for Managed Access Systems (MAS) installed. ... additional facilities to be installed by October, 2016. ...
(Date:6/9/2016)... June 9, 2016  Perkotek an innovation leader in attendance control systems is proud ... work hours, for employers to make sure the right employees are actually signing in, ... ... ... ...
(Date:6/3/2016)... 3, 2016 Das ... Nepal hat ein 44 ... geprägter Kennzeichen, einschließlich Personalisierung, Registrierung und IT-Infrastruktur, ... Produktion und Implementierung von Identitätsmanagementlösungen. Zahlreiche renommierte ... Januar teilgenommen, aber Decatur wurde als konformste ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... , June 24, 2016 Epic Sciences ... detects cancers susceptible to PARP inhibitors by targeting ... cells (CTCs). The new test has already been ... in multiple cancer types. Over 230 ... damage response pathways, including PARP, ATM, ATR, DNA-PK ...
(Date:6/24/2016)... ... ... Researchers at the Universita Politecnica delle Marche in Ancona combed medical journal ... Their findings are the subject of a new article on the Surviving Mesothelioma website. ... the blood, lung fluid or tissue of mesothelioma patients that can help point doctors ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... announce the launch of their brand, UP4™ Probiotics, into Target stores nationwide. The ... is proud to add Target to its list of well-respected retailers. This list ...
(Date:6/23/2016)... - FACIT has announced the creation of a ... Propellon Therapeutics Inc. ("Propellon" or "the Company"), to ... of first-in-class WDR5 inhibitors for the treatment of ... an exciting class of therapies, possessing the potential ... patients. Substantial advances have been achieved with the ...
Breaking Biology Technology: