Navigation Links
Fur and feathers keep animals warm by scattering light
Date:1/23/2014

WASHINGTON, Jan. 23In work that has major implications for improving the performance of building insulation, scientists at the University of Namur in Belgium and the University of Hassan I in Morocco have calculated that hairs that reflect infrared light may contribute significant insulating power to the exceptionally warm winter coats of polar bears and other animals. The research was published today in The Optical Society's (OSA) open-access journal, Optics Express.

Biophotonics expert Priscilla Simonis, a researcher at the University of Namur and lead author of the Optics Express paper, was intrigued by the ability of polar bears to insulate their bodies to temperatures of 37 degrees Celsius (98.6 F) even during long, cold winters when outside temperatures are a frigid -40 C (-40 F). The feat was especially impressive given that the bears have a layer of fur that is only 5 centimeters thick.

The insulating power of the animals' coats made Simonis wonder why thermal insulation in buildings doesn't work as well. "Why do we need at least 60 cm of rockwool or glasswool" common types of building insulation made from minerals or glass fibers "to get a temperature of 20 degrees Celsius inside from about -5 degrees Celsius outside?" she asked. "Why is the polar bear fur much more efficient than what we can develop for our housing?"

Simonis and her team tackled the question by re-examining two of the different ways heat can travel: radiation, which transfers thermal energy through electromagnetic waves, and conduction, which transfers thermal energy through the vibrations of neighboring atoms and molecules. Most people assume that fur and feathers keep animals warm primarily by trapping a layer of air that slows thermal conduction, says Simonis. But she and her colleagues suspected that radiation might play a bigger role.

The scientists performed some
'/>"/>

Contact: Angela Stark
astark@osa.org
202-416-1443
The Optical Society
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Newly discovered dinosaur implies greater prevalence of feathers
2. Best evidence yet that dinosaurs used feathers for courtship
3. Study suggests why some animals live longer
4. NOAA discovers way to detect low-level exposure to seafood toxin in marine animals
5. Elephant seal tracking reveals hidden lives of deep-diving animals
6. Deep sea animals stowaway on submarines and reach new territory
7. Environmental concerns increasing infectious disease in amphibians, other animals
8. Ion selectivity in neuronal signaling channels evolved twice in animals
9. Super-strong, high-tech material found to be toxic to aquatic animals
10. Fossil study helps pinpoint extinction risks for ocean animals
11. Hunt for superbugs in Australian animals
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Fur and feathers keep animals warm by scattering light
(Date:10/16/2014)... researchers have challenged conventional thinking on how the bowel ... mechanism for how bowel cancer starts. , The researchers ... and regenerating the ,crypts, that are a feature of ... involved in bowel cancer development, a controversial finding as ... , Using 3D imaging technologies, Dr Chin Wee Tan ...
(Date:10/16/2014)... infections and worldwide claims the lives of 160,000 ... University have succeeded in developing a promising vaccination ... , Xavier Saelens (VIB/UGent): "We discovered a new ... development of a novel approach to vaccination against ... small children and elderly people." , RSV: ...
(Date:10/16/2014)... 16, 2014 NXT-ID, Inc. (NASDAQ: ... biometric authentication company focused on the growing mobile commerce ... including Wocket™, the Smart Wallet, at the 13 th ... a leading global conference on the intersection of technology ... Mark Anderson , founder and publisher of the Strategic ...
Breaking Biology News(10 mins):Cryptic clues drive new theory of bowel cancer development 2New perspectives for development of an RSV vaccine 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 3
... Might those bacteria lead oil companies to change their methods ... same time reducing the carbon dioxide that burning oil and ... be possible. Larter, professor of geoscience and holder ... University of Calgary, was the keynote speaker today for the ...
... a firm link between environmental change and human disease ... a team of scientists from the University of Wisconsin-Madison, ... of the CDC journal Emerging Infectious Diseases, ... incidence of malaria to land-use practices in the Amazon. ...
... bacteria in seven species of sharks and redfish captured ... of these wild, free-swimming fish harbored several drug-resistant bacterial ... Journal of Zoo and Wildlife Medicine , found antibiotic-resistant ... also found multidrug-resistant bacteria in fish at nearly all ...
Cached Biology News:Incidence of malaria jumps when Amazon forests are cut 2Incidence of malaria jumps when Amazon forests are cut 3Wild sharks, redfish harbor antibiotic-resistant bacteria 2
(Date:10/22/2014)... 2014 /PRNewswire/ - iCo Therapeutics ("iCo" or "the Company") ... for its Oral Amphotericin B program.  The company ... vitro work involving samples from HIV/AIDS patients ... complete pre clinical studies and regulatory filings to ... trial, utilizing approximately $700,000 of funding and technological ...
(Date:10/20/2014)... 2014 Mapp Biopharmaceutical,s valiant effort to ... to fight the Ebola outbreak will make the ... production of pharmaceuticals can be, according to Kalorama ... while some may be taken aback by the ... industry knowledge are well aware of the complex ...
(Date:10/20/2014)... Oct. 20, 2014  GenVec, Inc. (NASDAQ: GNVC ... , Ph.D., from its board of directors effective on October ... 2003, and served as its chairman from June 2006 to ... Nominating and Corporate Governance and Audit Committees of the board.  ... a decade of dedicated service to GenVec, and its stockholders," ...
(Date:10/19/2014)... 19, 2014 The Latin American hardware ... in Latin America with analysis and forecast of revenue. ... and is expected to reach $2,366.8 million by 2018, ... , Browse through the TOC of the Latin American ... the in-depth analysis provided. It also provides a glimpse ...
Breaking Biology Technology:iCo Therapeutics Announces Advancement of Oral Amphotericin B Program 2iCo Therapeutics Announces Advancement of Oral Amphotericin B Program 3Kalorama: ZMapp Highlights Need For Faster Biopharmaceutical Production 2Kalorama: ZMapp Highlights Need For Faster Biopharmaceutical Production 3Zola P. Horovitz To Retire From GenVec Board 2The Latin American hardware encryption display market is expected to reach $2,366.8 million by 2018 - New Report by MicroMarket Monitor 2The Latin American hardware encryption display market is expected to reach $2,366.8 million by 2018 - New Report by MicroMarket Monitor 3
... , , OMAHA, Neb., Dec. 8 ... of its SURVEYOR Scan K-RAS kit, the first in a ... featuring its proprietary SURVEYOR Nuclease and WAVE ® HS ... to mutation detection that uses a PCR amplification reaction and ...
... , NEW YORK, Dec. 8 Reportlinker.com ... in its catalogue: , Microplate Instrumentation & ... http://www.reportlinker.com/p0164370/Microplate-Instrumentation--Supplies---A-Global-Market-Perspective.html , Playing a pivotal role in ... has come to replace conventional micro test tubes and ...
... ... , AMSTERDAM, December 8 , ... , Elsevier, a world-leading publisher of scientific, technical ... new SciVal Spotlight tool. The institutions, including,National Chiao Tung University (Taiwan), St. ...
Cached Biology Technology:Transgenomic Announces the Commercial Launch of SURVEYOR(R) Scan K-RAS Mutation Detection Kit 2Transgenomic Announces the Commercial Launch of SURVEYOR(R) Scan K-RAS Mutation Detection Kit 3Transgenomic Announces the Commercial Launch of SURVEYOR(R) Scan K-RAS Mutation Detection Kit 4Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 2Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 3Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 4Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 5Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 6Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 7Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 8SciVal Spotlight Gaining Momentum Across the Globe as More Universities Seek Multidisciplinary View of Research Performance 2SciVal Spotlight Gaining Momentum Across the Globe as More Universities Seek Multidisciplinary View of Research Performance 3
Rabbit polyclonal to XTP4 ( Abpromise for all tested applications). entrezGeneID: 84299 SwissProtID: Q9BRT3...
Assay Diluent 500 mls...
ICC Diluent Buffer 250 ml...
...
Biology Products: