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:5/27/2015)... , May 27, 2015   ... medication safety systems and image documentation solutions ... of comprehensive, technologically-advanced automation solutions, is pleased ... integration. The Codonics® Safe Label System® (SLS), ... in conjunction with the Omnicell Anesthesia Workstation, ...
(Date:5/26/2015)... May 26, 2015 Research ... addition of the "Saudi Arabia Biometric Systems ... their offering. ,     (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , ,The biometric ... is projected to grow at over 22% ... is attributed to the surging demand for better ...
(Date:5/25/2015)... SYDNEY , May 25, 2015  Australia,s market ... inception stage, although 2014 saw the advent of several ... on 24 April 2015 is expected to ignite interest ... devices in Australia . This in ... the industry and drive new partnerships amongst vendors and ...
Breaking Biology News(10 mins):Codonics and Omnicell Expand Partnership 2Codonics and Omnicell Expand Partnership 3Codonics and Omnicell Expand Partnership 4Saudi Arabia Biometric Systems Market Forecast and Opportunities, 2020 with Morpho Safran, ZK Technlogy, and Suprema Dominating 2Australian wearables market to grow at CAGR of 78%; revenue of A$1 billion by 2018, says Frost & Sullivan 2Australian wearables market to grow at CAGR of 78%; revenue of A$1 billion by 2018, says Frost & Sullivan 3Australian wearables market to grow at CAGR of 78%; revenue of A$1 billion by 2018, says Frost & Sullivan 4
... BioMed Central and Wilfrid Laurier University today announce ... that provides a visible point of open access ... the University community. Built on BioMed ... extensive open access knowledge and technology experience, Laurier ...
... the mice the researchers found alterations which may be closely ... of an international study led by the Leipzig Max Planck ... the current issue of the renowned journal Cell . ... Mnchen have generated and analyzed a mouse model in which ...
... Technology, an award-winning biometric technology research and development ... leader in workforce management solutions, has chosen M2SYS ... solution that seamlessly interfaces with Kronos time and ... fingerprint and finger vein identification, enabling Kronos customers ...
Cached Biology News:'Canadian excellence' strengthened by extensive adoption of open access 2Mouse model provides clues to human language development 2M2SYS Technology to Offer Desktop Biometric Technology to Kronos Customers 2
(Date:5/27/2015)... , May 27, 2015  The Companion Diagnostics ... understanding and unprecedented access to the partnering deals ... healthcare companies during 2014. Using these ... into the partnering activities of the past year. ... the partnering and alliances deals announced worldwide.The initial ...
(Date:5/27/2015)... 27, 2015 RXi Pharmaceuticals Corporation (NASDAQ: ... discovering and developing innovative therapies primarily in the ... has commenced a public offering of shares of ... its common stock and overallotment purchase rights to ... of common stock, warrants and overallotment purchase rights ...
(Date:5/27/2015)... , May 26, 2015 ... announced the addition of Jain PharmaBiotech,s new ... and Companies" to their offering. ... molecular diagnostics technologies that will play an ... health, pharmaceutical industry, forensics and biological warfare ...
(Date:5/27/2015)... , May 26, 2015 Research and ... the "Global Breast Cancer Monoclonal Antibodies Market ... Globally, Roche seems to dominate the breast ... Its block buster molecule, Herceptin has been able ... was found that breast cancer cells become recalcitrant ...
Breaking Biology Technology:Companion Diagnostics Deals and Alliances of 2014 2RXi Pharmaceuticals Announces Proposed Public Offering of Common Stock and Warrants 2RXi Pharmaceuticals Announces Proposed Public Offering of Common Stock and Warrants 3Global Molecular Diagnostics Market 2015-2024 - Analysis of Key Technologies, Markets and Companies 2Global Molecular Diagnostics Market 2015-2024 - Analysis of Key Technologies, Markets and Companies 3Global Breast Cancer Monoclonal Antibodies Market Outlook 2020 2Global Breast Cancer Monoclonal Antibodies Market Outlook 2020 3
... July 26 /PRNewswire-FirstCall/ - Oncothyreon Inc. (Nasdaq: ONTY ) will ... Thursday, August 5, 2010 at 4:30 p.m. Eastern time ... , , ... States ) or (707) 287-9361 (International). In addition, the call will be webcast ...
... and TORONTO , July 26 ... testing in clinical research and diagnostics, has acquired Xceed Molecular, ... Breast Cancer Prognostic Assay, and Colon Cancer Xpress chip. The ... of Clinical Chemistry (AACC) annual meeting and Clinical Lab Expo, ...
... SHANGHAI , July 23 /PRNewswire-Asia-FirstCall/ -- China-Biotics, Inc.,("China-Biotics", ... probiotics products in China , today announced,it will host a conference ... 9, 2010 to discuss the fiscal year 2011 first quarter financial ... , , ...
Cached Biology Technology:Axela Acquires Xceed Molecular Creating Powerhouse in Robust and Easy-to-Use Systems for Translational Medicine 2Axela Acquires Xceed Molecular Creating Powerhouse in Robust and Easy-to-Use Systems for Translational Medicine 3Axela Acquires Xceed Molecular Creating Powerhouse in Robust and Easy-to-Use Systems for Translational Medicine 4China-Biotics to Report Fiscal Year 2011 First Quarter Financial Results on August 9 2
Glutamate Receptor 5/1a...
Mouse monoclonal [3G8] to MDMA ( Abpromise for all tested applications)....
Fluorescein isothiocyanate (FITC) mouse anti-human IFN-alpha2 50 ug...
Dog polyclonal to Porcine Pancreatic Islets of Langerhans Cells ( Abpromise for all tested applications). Antigen: Tissue / cell preparation (Pig): Sonicated crude membrane fraction of porcine p...
Biology Products: