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:2/24/2017)... -- EyeLock LLC, a leader of iris-based identity authentication ... solution on the latest Qualcomm® Snapdragon™ 835 mobile ... Congress 2017 (February 27 – March 2, ... Stand 3E10. The Snapdragon 835 ... combination of hardware, software and biometrics technologies ...
(Date:2/21/2017)... , February 21, 2017 ... 70 Millionen US-Dollar wachsen. Nach einem Gespräch mit mehr als ... einige Hindernisse zu überwinden gilt, um diese Prognose zu ... ... anderem die Mobilisierung der finanziellen Mittel für die Biobank, ...
(Date:2/13/2017)... FRANCISCO , Feb. 13, 2017  RSA ... centralized platform that is designed to enhance fraud ... latest release in the RSA Fraud & Risk ... enable organizations to leverage additional insights from internal ... tools to better protect their customers from targeted ...
Breaking Biology News(10 mins):
(Date:3/24/2017)... , March 24, 2017  Infectex Ltd., a ... today announced positive results of a Phase 2b-3 clinical ... regimen in patients with multidrug-resistant pulmonary tuberculosis (MDR-TB). SQ109 ... at Sequella, Inc. ( USA ) and ... A total of 140 patients were enrolled in a ...
(Date:3/24/2017)... March 24, 2017 Agenus Inc. (NASDAQ: AGEN), ... antibodies and cancer vaccines, today announced participation at the ...  Annual William Blair and Maidstone Life Sciences conference "Cancer ... in New York, NY . Agenus ... 29 at 9:40 am: Robert B. Stein , ...
(Date:3/23/2017)... , March 23, 2017  SeraCare ... to global in vitro diagnostics manufacturers and ... the industry,s first multiplexed Inherited Cancer ... testing by next-generation sequencing (NGS). The Seraseq™ ... developed with input from industry experts to ...
(Date:3/23/2017)... NetworkNewsWire Editorial Coverage  ... Cancer remains one of the world,s ... systems, in terms of costs and resources. However, as the ... of innovative and efficient therapies that demonstrate higher chances of ... cancer treatments, a growing number of patients receiving immuno-oncology therapies ...
Breaking Biology Technology: