Navigation Links
Beetle bling: Researchers discover optical secrets of 'metallic' beetles
Date:4/25/2011

vironment."

To interpret the cause of this metallic look, Vargas and his team assumed that a sequence of layers of chitin appears through the cuticle, with successive layers having slightly different refractive indices.. In these beetles, the cuticle, which is just 10 millionths of a meter deep, has some 70 separate layers of chitina nitrogen-containing complex sugar that creates the hard outer skeletons of insects, crabs, shrimps, and lobsters. The chitin layers become progressively thinner with depth, forming a so-called "chirped" structure.

"Because the layers have different refractive indices," Vargas says, "light propagates through them at different speeds. The light is refracted throughand reflected byeach interface giving, in particular, phase differences in the emerging reflected rays. For several wavelengths in the visible range, there are many reflected rays whose phase differences allow for constructive interference. This leads to the metallic appearance of the beetles."

This is similar to the way in which a prism breaks white light into the colors of the rainbow by refraction, but in the case of these beetles, different wavelengths, or colors of light are reflected back more strongly by different layers of chitin. This creates the initial palette of colors that enable the beetles to produce their distinctive hues. The mystery the researchers still needed to understand in more detail, however, was how the beetles could so perfectly create the structure causing the brilliant metallic tones of silver and gold.

Using a device they specially designed to measure the reflection of light when it strikes the curved surface of the beetles' elytra, Vargas and his colleagues found that as light strikes the interface between each successive layer (the first interface being the boundary between the outside air and the top chitin layer), some of its energy is reflected and some is transmitted down to the next interface.

'/>"/>
Contact: Angela Stark
astark@osa.org
202-416-1443
Optical Society of America
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Beetles get by with a little help from their friends
2. Wielding microbe against microbe, beetle defends its food source
3. Cross kingdom conflicts on a beetles back
4. Landscape-scale treatment promising for slowing beetle spread
5. Holy guacamole: invasive beetle threatens Floridas avocados
6. Controlling cucumber beetles organically
7. New Southern California beetle killing oaks
8. Beetle shell inspires brilliant white paper
9. What scientists know about jewel beetle shimmer
10. Inconspicuous leaf beetles reveal environments role in formation of new species
11. Scientists isolate new antifreeze molecule in Alaska beetle
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Beetle bling: Researchers discover optical secrets of 'metallic' beetles
(Date:4/20/2015)... April 20, 2015 Huntington Memorial Hospital is ... implant a new miniaturized, wireless monitoring sensor to manage ... first and only FDA-approved heart failure monitoring device that ... used by physicians to manage heart failure. ... implanted in the pulmonary artery (PA) during a non-surgical ...
(Date:4/14/2015)... , April 14, 2015 NXT-ID, Inc. (NASDAQ: ... authentication company focused on the growing mobile commerce market, ... for the 2015 New York Design Awards under the ... New York City Design Awards are part of a ... over 2,500 ratings from the marketplace, industry and judging ...
(Date:4/9/2015)... 9, 2015 Synaptics Inc. (NASDAQ: SYNA ), ... that it will report financial results for the third ... after the close of market. The company will host ... 2:00 p.m. PT (5:00 p.m. ET), during which management ... on the live call, analysts and investors should dial ...
Breaking Biology News(10 mins):Huntington Memorial Hospital Becomes First in the San Gabriel Valley to Offer Patients a New Heart Failure Monitoring Solution 2Huntington Memorial Hospital Becomes First in the San Gabriel Valley to Offer Patients a New Heart Failure Monitoring Solution 3NXT-ID's Wocket Smart Wallet Nominated for 2015 New York Design Awards in 'Product Design- Technology' 2NXT-ID's Wocket Smart Wallet Nominated for 2015 New York Design Awards in 'Product Design- Technology' 3Synaptics to Report Third Quarter Results on April 23 2
... by two Queens scientists has resulted in an exciting new ... chemical weapons and pesticides. Recently completed testing by an ... be greater than 99 per cent effective when used on ... tested in solution, full destruction of all three agents was ...
... genetic modification (GM) and RNA Interference are being deployed ... series of European and global initiatives. The ground was ... that exploit these technologies at a recent workshop organised ... highlighted the interlocking themes underlying the debate over livestock ...
... in molecular targeting, translational cancer research and cancer ... 17,000 scientists from around the world gather at ... the 2008 Annual Meeting of the American Association ... the meeting will include late-breaking clinical trial findings ...
Cached Biology News:Queen's develops safe 'green' decontamination method 2Europe develops new technologies to boost health of livestock 2Europe develops new technologies to boost health of livestock 3AACR annual meeting showcases developments in understanding and targeting cancers 2AACR annual meeting showcases developments in understanding and targeting cancers 3
(Date:4/28/2015)... The Pistoia Alliance, a global, not-for-profit alliance of ... to innovation in R&D, has announced the start of ... Mapping project has been set up to create better ... life sciences R&D. The project will see the Pistoia ... services to enable the universal application of ontologies. , ...
(Date:4/28/2015)... 28, 2015 According to a 2013 ... patients receive medical treatment from burn injuries per year. ... injury, extensive formation of scars with subsequent contractures remains ... for which there is no adequate treatment. Contractures are ... movement and can cause permanent deformity. , Synedgen ...
(Date:4/28/2015)... Reproductive endocrinologist Dr. Kaylen Silverberg , ... battling infertility in this country, testified on behalf of ... first state in the nation to consider creating a clearinghouse ... who desire to receive them. , Infertility affects over 7.3 ... is one of the few medical diseases that is curable, ...
(Date:4/27/2015)... HEIDELBERG , Alemania, April 27, 2015 ... un nuevo receptor utilizando tecnología de descubrimiento de biomarcador ... en el tratamiento de millones de pacientes con cáncer ... que ha recibido una patente en Europa titulada "Tissue ... de Molecular Health de que EPHB4 es un nuevo ...
Breaking Biology Technology:Pistoia Alliance Announces Start of Ontologies Mapping Project 2Synedgen Burn Treatment Results Presented at Premier Wound Conference 2Synedgen Burn Treatment Results Presented at Premier Wound Conference 3Texas Fertility Center Supports a Groundbreaking HB1145 that Facilitates Embryo Donation in Texas 2Texas Fertility Center Supports a Groundbreaking HB1145 that Facilitates Embryo Donation in Texas 3Molecular Health obtiene la patente para un nuevo receptor 2Molecular Health obtiene la patente para un nuevo receptor 3
... definitive agreement with Elan Pharmaceuticals, Inc. (a subsidiary of Elan Corporation, plc) ( ELN) ("Elan") to acquire the analgesic therapy, PRIALT(R) (ziconotide intrathecal infusion). , ... , ... ... ...
... March 11 /PRNewswire/ - Trillium Therapeutics Inc. (TTI), ... it has entered into two definitive license agreements with University ... in Toronto, Ontario , granting Trillium exclusive worldwide rights ... stem cell transplantation and cancer. , ...
... President and Chief Executive Officer of Neurocrine Biosciences, will be presenting at the Roth 22nd Annual OC Growth Conference in Laguna Niguel . , ... , ... ... ...
Cached Biology Technology:Azur Pharma Announces the Signing of a Definitive Agreement to Acquire PRIALT(R) From Elan 2Azur Pharma Announces the Signing of a Definitive Agreement to Acquire PRIALT(R) From Elan 3Azur Pharma Announces the Signing of a Definitive Agreement to Acquire PRIALT(R) From Elan 4Azur Pharma Announces the Signing of a Definitive Agreement to Acquire PRIALT(R) From Elan 5Azur Pharma Announces the Signing of a Definitive Agreement to Acquire PRIALT(R) From Elan 6Trillium expands immunology pipeline and enters stem cell field through in-licensing of two new programs 2Trillium expands immunology pipeline and enters stem cell field through in-licensing of two new programs 3Neurocrine Biosciences to Present at the Roth 22nd Annual OC Growth Conference 2
...
...
...
Sold individually or included in the MasterAmp™ PCR Optimization Kit without ammonium sulfate. Includes dNTPs, buffer, and varying amounts of MgCl2 and the MasterAmp™ PCR Enhancer (with be...
Biology Products: