Navigation Links
Researchers uncover secrets of a mollusk's unique bioceramic armor
Date:3/30/2014

CAMBRIDGE, Mass-- The shells of a sea creature, the mollusk Placuna placenta, are not only exceptionally tough, but also clear enough to read through. Now, researchers at MIT have analyzed these shells to determine exactly why they are so resistant to penetration and damage even though they are 99 percent calcite, a weak, brittle mineral.

The shells' unique properties emerge from a specialized nanostructure that allows optical clarity, as well as efficient energy dissipation and the ability to localize deformation, the researchers found. The results are published this week in the journal Nature Materials, in a paper co-authored by MIT graduate student Ling Li and professor Christine Ortiz.

Ortiz, the Morris Cohen Professor of Materials Science and Engineering (and MIT's dean for graduate education), has long analyzed the complex structures and properties of biological materials as possible models for new, even better synthetic analogs.

Engineered ceramic-based armor, while designed to resist penetration, often lacks the ability to withstand multiple blows, due to large-scale deformation and fracture that can compromise its structural integrity, Ortiz says. In transparent armor systems, such deformation can also obscure visibility.

Creatures that have evolved natural exoskeletons many of them ceramic-based have developed ingenious designs that can withstand multiple penetrating attacks from predators. The shells of a few species, such as Placuna placenta, are also optically clear.

To test exactly how the shells which combine calcite with about 1 percent organic material respond to penetration, the researchers subjected samples to indentation tests, using a sharp diamond tip in an experimental setup that could measure loads precisely. They then used high-resolution analysis methods, such as electron microscopy and diffraction, to examine the resulting damage.

The material initially
'/>"/>

Contact: Andrew Carleen
acarleen@mit.edu
617-253-1682
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2

Related biology news :

1. Scripps Florida scientists offer best practices nutrition measurement for researchers
2. Researchers identify new protein markers that may improve understanding of heart disease
3. Two researchers known for identifying and treating bubble boy disease honored by March of Dimes
4. Researchers at IRB discover a key regulator of colon cancer
5. Researchers reveal the dynamics behind Arctic ecosystems
6. IRCM researchers uncover a new function for an important player in the immune response
7. UGA researchers explore function of cancer-causing gene
8. Researchers present comprehensive roadmap of blood cells
9. UT Southwestern ob/gyn researchers studying genetic factors in premature births
10. Researchers issue state-of-the-state on genetic-based testing & treatment for breast cancer
11. Miscarriage clues identified in new DNA test according to researchers at Montefiore and Einstein
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/21/2014)... CAMBRIDGE, MA -- In recent years, new strains of ... antibiotics. Each year, these superbugs, including drug-resistant forms of ... nationwide, and kill at least 23,000. Despite the urgent ... new classes of antibiotics in the past decade. , ... on these superbugs. Using a gene-editing system that can ...
(Date:9/21/2014)... A team of Stanford researchers has developed a protein ... to break away from original tumor sites, travel through ... in the body. , This process, known as metastasis, ... , "The majority of patients who succumb to cancer ... Jennifer Cochran, an associate professor of bioengineering who describes ...
(Date:9/19/2014)... Oklahoma biology professor will study the unique bioelectric signaling ... eventually benefit people,s health. The OU researcher is ... required to produce the signals used to map the ... at a rate of 500-600 discharges a second throughout ... electric fish are extreme, but necessary for survival. , ...
Breaking Biology News(10 mins):Battling superbugs 2Battling superbugs 3Battling superbugs 4Stanford researchers create 'evolved' protein that may stop cancer from spreading 2Stanford researchers create 'evolved' protein that may stop cancer from spreading 3Stanford researchers create 'evolved' protein that may stop cancer from spreading 4
... a common feature of prion disease-affected human, mouse, and ... Neena Singh and colleagues at Case Western Reserve University ... findings, published March 13 in the open-access journal ... of neurotoxicity in prion disorders, and novel avenues for ...
... Kansas State,University, with collaboration from Epitopix LLC, have ... E. coli O157 in beef cattle. ... the post-harvest food safety,aspect, whether it,s E. ... College of Veterinary Medicine. Thomson is the Jones,Professor ...
... German . The Aarhus University ... between the many conference participants and according to ... Kyoto was very successful in doing so: "I am ... will undoubtedly contribute significantly to the future climate debate ...
Cached Biology News:Iron is involved in prion disease-associated neuronal demise 2K-State researchers help Epitopix license the United States' first E. coli O157 vaccine for cattle 2Seven recommendations from Aarhus to COP15 2Seven recommendations from Aarhus to COP15 3
(Date:9/22/2014)... California (PRWEB) September 22, 2014 ... primal desire to stay young has groomed and ... dollar industry worldwide. Growing emphasis on appearance maintenance ... Toxin is a neurotoxic protein obtained from the ... acetylcholine, resulting in muscle relaxation. With cosmetic indications ...
(Date:9/22/2014)...  Neogen Corporation (Nasdaq: NEOG ) announced ... its 2015 fiscal year, which ended Aug. 31, was ... of $7,839,000 in the first quarter of last year. ... 2013, earnings per share in the current quarter were ... First quarter revenues increased 15% to $67,599,000, from the ...
(Date:9/22/2014)... (PRWEB) September 22, 2014 METTLER ... parcel and pallet measuring device CNS110 ScanTape™ ... manual data entry, offering greater ease and accuracy ... that result can significantly enhance productivity—an important benefit ... where processing volume equals profits. , Usable ...
(Date:9/21/2014)... first time, scientists have discovered how to produce ultra-thin ... stiffness greater than that of today,s strongest nanotubes and ... team led by John V. Badding, a professor of ... the 21 September 2014 issue of the journal ... view, our discovery is intriguing because the threads we ...
Breaking Biology Technology:Strong Demand for Non-Invasive Cosmetic Procedures Drives the Global Botulinum Toxin Market, According to New Report by Global Industry Analysts, Inc. 2Strong Demand for Non-Invasive Cosmetic Procedures Drives the Global Botulinum Toxin Market, According to New Report by Global Industry Analysts, Inc. 3Neogen reports 13% net income increase 2Neogen reports 13% net income increase 3Neogen reports 13% net income increase 4Neogen reports 13% net income increase 5Neogen reports 13% net income increase 6Neogen reports 13% net income increase 7ScanTape™ Handheld Dimensioner Increases Processing Volume 2Smallest possible diamonds form ultra-thin nanothreads 2Smallest possible diamonds form ultra-thin nanothreads 3Smallest possible diamonds form ultra-thin nanothreads 4
... up a limbo line for the WTN readership. The question is ... high tech off the ground in your organization. , ,What got ... theft stories. Turns out the perps are not the archetypal Dorito-munching, ... In one case a bank gave its customer list to some ...
... alarums and excursions relevant to the world of Midwest ... ,Last week, the Midwest Venture Summit was held in ... 10 were sponsored by the Chicago chapter of the ... were registered to attend, an unofficial count estimated that ...
... could bring better, safer treatments to cancer patients worldwide might ... firm with more than 200 employees that has grown to ... its founder said. , ,The company is run by Thomas ... commercial when GE Medical cut off its funding for his ...
Cached Biology Technology:How low (tech) must you go? 2How low (tech) must you go? 3Midwest Venture Summit disappoints; Cato grades Midwest governors 2Midwest Venture Summit disappoints; Cato grades Midwest governors 3Midwest Venture Summit disappoints; Cato grades Midwest governors 4TomoTherapy considers IPO with medical-device business on the rise 2TomoTherapy considers IPO with medical-device business on the rise 3
Vybrant® Multidrug Resistance Assay Kit...
...
... CultureWell cell culture systems provide an ... for staining and imaging. Each system ... standard optical-quality coverslips in cell culture ... sterile and ready to use. Individual ...
... of DETACHaBEAD Mouse CD4, polyclonal Sheep anti-Mouse ... from Dynabeads Mouse CD4 (L3T4). Detach ... Dynabeads Mouse CD4 using DETACHaBEAD Mouse CD4. ... downstream application including flow cytometry, functional studies ...
Biology Products: