Navigation Links
Alaska frogs reach record lows in extreme temperature survival
Date:7/22/2014

gar was not present and sugar and other cryoprotectants are thought to "hold" water inside the cell."

The curious thing Larson discovered is that when wood frogs are outside in their natural environment they accumulate much higher concentrations of glucose in their tissues than do frogs frozen in the lab.

Glucose concentrations in the outside frogs were 13-fold higher in muscle tissue, 10-fold higher in heart tissue and 3.3-fold higher in liver tissue compared to lab-frozen frogs, as described in their paper published in the Journal of Experimental Biology.

This extra protection enabled frogs to survive colder temperatures for a longer time than scientists previously thought, but Larson and Barnes wondered how they accumulated so much glucose?

Larson thinks the process that creates freezer burn on a frozen steak gives frogs the ability to survive being frozen at minimum temperatures below zero (minus 18 Celsius) for up to 218 days with 100 percent survival.

Frogs collected from sites in the Eastern U.S. and Canada have previously been shown to only survive being frozen for a few weeks and to no lower than about 19 degrees (minus 7.2 Celsius).

"In the field in early Autumn it's freezing during the night, thawing slightly during the day, and these repeated freezing episodes stimulate the frogs to release more and more glucose," Larson said. "It's not warm enough for long enough for the frog to reclaim much of that glucose and over time it accumulates giving the frog more protection against cell damage."

Lab-frozen frogs are held at a constant temperature and without the freeze-thaw cycles Larson observed in the wild and so the frogs made glucose only when they initially froze and that was that.

"Whether the extremes in freezing tolerance in Alaska frogs as compared to more southern populations are due to patterns of temperature change during freezing or are due to genetic differences
'/>"/>

Contact: Marie Thoms
methoms@alaska.edu
907-474-7412
University of Alaska Fairbanks
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. New technology tracks sparrow migration for first time from California to Alaska
2. Funny River Fire, Alaska
3. Update on Funny River Fire, southern Alaska
4. Alaska neuroscientist receives national mentor award
5. Athletic frogs have faster-changing genomes
6. Richer parasite diversity leads to healthier frogs, says University of Colorado study
7. Preserved frogs hold clues to deadly pathogen
8. Genetic matchmaking saves endangered frogs
9. What do American bullfrogs eat when theyre away from home? Practically everything!
10. New scientific studies reveal Midwestern frogs decline, mammal populations altered by invasive plant
11. Croaking chorus of Cuban frogs make noisy new neighbors
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Alaska frogs reach record lows in extreme temperature survival
(Date:3/31/2015)... 2015   Guidepoint , a leading global research ... Pain Management TRACKER, part of the Guidepoint TRACKER ... the medical device and therapeutics markets. The Post-Surgical Pain ... volumes, market share, and adoption rates across three major ... surgery. The Post-Surgical Pain Management TRACKER will ...
(Date:3/26/2015)... 2015 The Granite Club, ... athletic club, today announced it has implemented a state-of-the-art ... movement for members and staff, while restricting access to ... we selected FST,s IMID Access system because it has ... members and staff, in addition to unparalleled security," said ...
(Date:3/24/2015)... Markets ( http://www.researchandmarkets.com/research/kvdtcw/face_and_voice ) has announced the addition of ... report to their offering. This report analyzes the ... the following Segments: Face Biometrics, and Voice Biometrics. The report provides ... Japan , Europe , ... Africa , and Latin America ...
Breaking Biology News(10 mins):Guidepoint Launches Post-Surgical Pain Management TRACKER 2Guidepoint Launches Post-Surgical Pain Management TRACKER 3Granite Club First Private Club in North America to Implement FST Biometrics Secure Access Solution, as Part of Multi-million Dollar Expansion 2Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 2Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 3Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 4Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 5Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 6
... Research Institute (NHGRI), one of the National Institutes ... Sequencing Research Network will begin sequencing 12 more ... and several important insects, as part of its ... genome. , The National Advisory Council for Human ...
... a marvel of versatility, creating a variety of cells that ... out these tasks, immune cells follow a career path that ... in the May 2005 issue of Immunity, Fox Chase Cancer ... Dietmar J. Kappes, Ph.D., show that cell-receptor signaling strength influences ...
... the biological literature resides in full text articles, instead ... publicly available literature data mining tools. Most literature mining ... extracted from curated gene or protein databases. This is ... the many name variants which are used to refer ...
Cached Biology News:NHGRI targets 12 more organisms for genome sequencing 2NHGRI targets 12 more organisms for genome sequencing 3NHGRI targets 12 more organisms for genome sequencing 4NHGRI targets 12 more organisms for genome sequencing 5Fox Chase study shows that weakened T-cell receptor signals change T-cell lineage 2Fox Chase study shows that weakened T-cell receptor signals change T-cell lineage 3
(Date:4/25/2015)... Join us for a webinar at 12 pm ... using the Transcreener® ADP Assay , Register Now ... being incorporated into lead development efforts because longer engagement ... therapeutic window and reduced side effects. Though residence ... surface plasmon resonance, conjugation of drugs can affect their ...
(Date:4/24/2015)... , April 24, 2015 /PRNewswire/ - BioAmber Inc. (NYSE: ... MaterialScience as the supplier of bio-succinic acid used ... polyurethanes for textile applications that Bayer MaterialScience has ... launched IMPRANIL ® eco, a series of ... reaches as high as 65%.  IMPRANIL ® ...
(Date:4/24/2015)... 24, 2015 Seoul Semiconductor announced ... various applications in the lighting market. In ... of this technology in emerging markets such as ... wide range of applications such as streetlight and ... lighting. , First launched in 2005 the Acrich ...
(Date:4/23/2015)... , April 23, 2015 BioTE Medical President ... book "Age Healthier Live Happier - Avoiding Over-Medication through ... Age Management Medicine Group Conference at JW Marriott / ... ",Age Healthier Live Happier, is a welcomed ... over-medication and searching for a higher quality of life ...
Breaking Biology Technology:BellBrook Labs Webinar: Analyzing Kinase Inhibitor Residence Times using the Transcreener® ADP Assay 2Bayer MaterialScience Names BioAmber As Its Supplier For New Product Line - Bio-succinic acid forms backbone of innovative new bio-based polyurethanes for textiles 2Bayer MaterialScience Names BioAmber As Its Supplier For New Product Line - Bio-succinic acid forms backbone of innovative new bio-based polyurethanes for textiles 3Bayer MaterialScience Names BioAmber As Its Supplier For New Product Line - Bio-succinic acid forms backbone of innovative new bio-based polyurethanes for textiles 4Acrich Technology from Seoul Semiconductor Adopted in Installations Worldwide 2Release and Book Signing of BioTE Medical President Gary Donovitz M.D. 'Age Healthier Live Happier' at Age Management Medicine Group (AMMG) Conference 2Release and Book Signing of BioTE Medical President Gary Donovitz M.D. 'Age Healthier Live Happier' at Age Management Medicine Group (AMMG) Conference 3
... Cylene Pharmaceuticals today announced,the initiation of a Phase ... carcinoid/neuroendocrine tumors (C/NET), which are malignant,cancers arising from ... "Quarfloxin (CX-3543) is a small molecule ... abnormal nucleoli of cancer cells, thereby,selectively inducing apoptotic ...
... PAREXEL International,Corporation (Nasdaq: PRXL ), ... the Company has been named the "Best Contract,Research ... award was,presented to PAREXEL at the fourth annual ... London, England. The Scrip Awards are designed to,celebrate ...
... Precision(R), Inc. a,leading provider of imaging, measurement, and ... that it will introduce a new imaging,system at ... conference with,twice the resolution of traditional microscopes. ... system developed by scientists at the, University of ...
Cached Biology Technology:Cylene Pharmaceuticals Initiates Phase II Clinical Trial of Quarfloxin (CX-3543) in Patients With Carcinoid/Neuroendocrine Tumors 2Cylene Pharmaceuticals Initiates Phase II Clinical Trial of Quarfloxin (CX-3543) in Patients With Carcinoid/Neuroendocrine Tumors 3PAREXEL Receives Best CRO Award from Scrip 2PAREXEL Receives Best CRO Award from Scrip 3PAREXEL Receives Best CRO Award from Scrip 4Applied Precision Introduces New Super-Resolution Imaging System Doubling Resolution of Traditional Microscopes 2
Tan solid. A glycoside used to permeabilize cellular membranes. Exhibits hemolytic activity. Contaminants: ash: ≤10%. Soluble in H 2 O. pH 4.4 - 4.6. RTECS VQ1400000, CAS 8047-15-2. References:...
Anti Autotaxin /ENPP2 , - (Rabbit)...
... yellow solid. An N-nitroso-containing diabetogenic compound ... donor in pancreatic islets. An antibiotic ... alkylation and DNA strand breaks in ... HPLC. Soluble in H 2 O. ...
Mouse monoclonal antibody to CDC2L5 - cell division cycle 2-like 5 (cholinesterase-related cell division controller)...
Biology Products: