Navigation Links
How a fish broke a law of physics
Date:10/25/2012

Reflective surfaces polarize light, a phenomenon that fishermen or photographers overcome by using polarizing sunglasses or polarizing filters to cut our reflective glare. However, PhD student Tom Jordan from the Bristol Centre for Complexity Sciences and his supervisors Professor Julian Partridge and Dr Nicholas Roberts in Bristol's School of Biological Sciences found that these silvery fish have overcome this basic law of reflection an adaptation that may help them evade predators.

Previously, it was thought that the fish's skin which contains "multilayer" arrangements of reflective guanine crystals would fully polarize light when reflected. As the light becomes polarized, there should be a drop in reflectivity.

The Bristol researchers found that the skin of sardines and herring contain not one but two types of guanine crystal each with different optical properties. By mixing these two types, the fish's skin doesn't polarize the reflected light and maintains its high reflectivity.

Dr Roberts said: "We believe these species of fish have evolved this particular multilayer structure to help conceal them from predators, such as dolphin and tuna. These fish have found a way to maximize their reflectivity over all angles they are viewed from. This helps the fish best match the light environment of the open ocean, making them less likely to be seen."

As a result of this ability, the skin of silvery fish could hold the key to better optical devices. Tom Jordan said: "Many modern day optical devices such as LED lights and low loss optical fibres use these non-polarizing types of reflectors to improve efficiency. However, these man-made reflectors currently require the use of materials with specific optical properties that are not always ideal. The mechanism that has evolved in fish overcomes this current design limitation and provides a new way to manufacture these non-polarizing reflectors."


'/>"/>

Contact: Hannah Johnson
hannah.johnson@bristol.ac.uk
44-117-928-8896
University of Bristol
Source:Eurekalert

Page: 1

Related biology news :

1. A sea of broken promises
2. Improved Authentication and Confidentiality Protection. ICAP Patent Brokerage Announces for Auction Important Patents in Data Encryption and Document Security
3. Physics and math shed new light on biology by mapping the landscape of evolution
4. Physics confirms sprinters are performing better than ever before
5. The physics of going viral
6. T cells hunt parasites like animal predators seek prey, a Penn Vet-Penn Physics study reveals
7. Young Scientist Award for Socio- and Econophysics 2012 for Arne Traulsen
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/17/2014)... 15, 2014  HITLAB SM announced today ... audit to confirm its adherence to current U.S. ... enables HITLAB to conduct regulated smart device and ... for patient safety and research quality. ... quality, and delivery with innovative technology," said ...
(Date:12/17/2014)...  Automation is fundamentally transforming the travel experience ... international borders. Over the past decade, ePassports, biometric ... travelers to self process through border control via ... an increasing number of airports, seaports, and land ... to Maxine Most , Principal at Acuity ...
(Date:12/11/2014)... Research and Markets , ... http://www.researchandmarkets.com/research/9ql3kr/biometrics_market ) has announced the addition of the ... to their offering. One major ... of multimodal biometric systems. Multimodal biometric systems utilize ... verification and identification purposes. This helps to reduce ...
Breaking Biology News(10 mins):HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2Biometrics Market in India 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... from the north-central U.S. and beyond will convene in Kalamazoo, ... and discuss new science, expand on existing science, and explore ... a special emphasis on the Great Lakes. Events include a ... by William F. Ruddiman titled, "When Did We Transform Earth,s ...
... York, NY (April 18, 2013) An excess of ... psychosis in people who are at risk for schizophrenia, ... Center (CUMC) published in the current issue of ... diagnostic tool for identifying those at risk for schizophrenia ...
... IOF Medal of Achievement has been presented today to ... Department of Internal Medicine, Hospital del Mar, Director of ... Institute of Medical Research and Professor of Medicine at ... Foundation (IOF) awards the IOF Medal of Achievement every ...
Cached Biology News:Kalamazoo center of geologic focus this May 2High levels of glutamate in brain may kick-start schizophrenia 2IOF Medal of Achievement awarded to Professor Adolfo Diez-Perez 2
(Date:12/24/2014)... The report expects global cell isolation and expansion ... provides a carefully analyzed data about the vital drivers, ... , Full Copy of Report @ http://bit.ly/1yUxy0T ... cell expansion will keep witnessing growth at an impressive ... be driven by rapid technological advancements, government funding and ...
(Date:12/24/2014)... 23, 2014 China Biologic Products, Inc. ... leading fully integrated plasma-based biopharmaceutical company in ... majority-owned subsidiary, Shandong Taibang Biological Products Co. Ltd., ... the China Food and Drug Administration (the "CFDA") ... previously disclosed in the Company,s public filings, the ...
(Date:12/24/2014)... -- PharmaBoardroom,s new report, , Healthcare ... for free download , digs deep into this vibrant ... the sector today. One area where ... developing a homegrown pharmaceutical manufacturing base, even if the government,s ... way off. A cursory comparison with neighboring Morocco ...
(Date:12/24/2014)... SARASOTA, Fla. , Dec. 23, 2014  Rock ... today that it has filed a Clinical Trial Application ... Medicines Healthcare products Regulatory Agency (MHRA) seeking regulatory approval ... its lead molecule, Anatabine Citrate. Contingent on ... to conduct a Phase I trial to assess the ...
Breaking Biology Technology:The Cell Expansion Market is Expected to Reach $14.8 billion by 2019 - New Research Report by MarketsandMarkets 2The Cell Expansion Market is Expected to Reach $14.8 billion by 2019 - New Research Report by MarketsandMarkets 3China Biologic Receives GMP Certification for New Coagulation Factor Facility 2China Biologic Receives GMP Certification for New Coagulation Factor Facility 3PharmaBoardroom Releases New Algeria Pharmaceuticals Report 2PharmaBoardroom Releases New Algeria Pharmaceuticals Report 3Rock Creek Pharmaceuticals Files Clinical Trial Application in the UK for Clinical Trials of Anatabine Citrate Formulations 2Rock Creek Pharmaceuticals Files Clinical Trial Application in the UK for Clinical Trials of Anatabine Citrate Formulations 3
... CryoLife, Inc. (NYSE: CRY ),a biomaterials, medical device ... to participate in the 19th Annual Piper Jaffray,Health Care ... on Tuesday,November 27, 2007. Steven G. Anderson, president ... beginning at approximately 1:30 p.m. EST. CryoLife,s live ...
... pm ET on November 27, 2007, CAMBRIDGE, Mass., ... today announced its participation,in the Lazard Capital Markets Fourth ... at the New York Palace Hotel in New York,City. ... be presenting at 2:00 pm ET on Tuesday, November ...
... Scientists have announced,that they successfully reprogrammed adult ... of patient-specific medical treatments and,research without the need ... the Discovery Institute,s Senior Fellow in Bioethics,and author ... hailed the,breakthrough as demonstrating that ethical science is ...
Cached Biology Technology:CryoLife to Present at 19th Annual Piper Jaffray Health Care Conference in New York 2Targanta to Present at Lazard Capital Markets Fourth Annual Healthcare Conference 2
... new product number, created to easily match ... yet, please order under the old Sigma-Aldrich ... assistance. ID clarifier: tissue-culture treated ... cm 2 D H 245 ...
... Novagens PhageMaker System is optimized for maximum ... ligated with any bacteriophage l vector. Using a ... > 10^7 pfu/g arms (> 4 x 10^8 ... This one-tube system is extremely easy to use; ...
Mouse monoclonal [7B9] to beta II Tubulin ( Abpromise for all tested applications). Antigen: Synthetic peptide, CEEEEGEDEA found at the c-terminus of beta II tubulin. Entrez GeneID: 10383 ...
Polymerase (RNA) II (DNA directed) polypeptide L...
Biology Products: