Navigation Links
Bare bones of crystal growth: Biomolecules enhance metal contents in calcite
Date:10/31/2008

Blacksburg, Va. From shells to bones, the skeletons of organisms contain small amounts of impurity elements such as magnesium. Because the levels of these elements provide important clues to past environments, a considerable effort has focused on understanding how to relate impurity contents to the ancient environments in which an organism lived.

In the October 31 issue of Science magazine, Allison Stephenson, a Ph.D. candidate in geoscience, and Patricia Dove, professor of geoscience in the College of Science at Virginia Tech, and colleagues* report that a hydrophilic peptide, similar in character to those found in calcifying organisms, significantly enhances the magnesium (Mg)-content of calcite.

"We knew from another study in our group (Elhadj et al., 2006, PNAS) that the chemistry of simple peptides as well as proteins could be tuned to control crystal growth rate and change crystal morphology," said Dove. "From that understanding, we realized that the water-structuring abilities of certain biomolecules could also influence the amount of impurities that can go into minerals."

"All organisms use proteins to grow minerals into complex shapes with remarkable functions," said lead author Stephenson. "But this finding is especially meaningful for geologists because Mg-content in carbonates is used as a 'paleo thermometer'. That is, we know that Mg content increases with temperature, but now we see that certain biomolecules could also affect those 'signatures'. The findings raise questions about the interplay of different factors on metal-contents in biominerals."

The findings also offer new insights for materials synthesis because a high degree of control on impurities is often necessary to give specific properties such as strength or electrical conductivity. By using biomolecules, it may be possible to tune impurities to desired levels, Dove said.

"Also, this basic research suggests new ways of looking at
'/>"/>

Contact: Susan Trulove
STrulove@vt.edu
540-231-5646
Virginia Tech
Source:Eurekalert

Page: 1 2

Related biology news :

1. Why binge drinking is bad for your bones
2. IOF calls on European citizens to stand tall and speak out for their bones
3. Excavated Jericho bones may help Israeli-Palestinian-German team combat tuberculosis
4. Where and why humans made skates out of animal bones
5. Ancient fish bones reveal impacts of global warming beneath the sea
6. New research on structure of bones raises questions for treatment of osteoporosis
7. Photonic crystal biosensors detect protein-DNA interactions
8. Scientists demonstrate the sharpest measurement of ice crystals in clouds
9. Crystal (eye) ball: Study says visual system equipped with future seeing powers
10. New clues to how proteins dissolve and crystallize
11. Scientists find missing evolutionary link using tiny fungus crystal
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/17/2014)... To date, antidotes ... doctors are often limited to supportive therapy such as induced ... of drugs involved. So what can be done if a ... professor Jean-Christophe Leroux from the Institute of Pharmaceutical Sciences at ... "The task was to develop an agent that could eliminate ...
(Date:10/16/2014)... Mary,s Virginia Institute of Marine Science have received ... Agency to identify the streams and wetlands most ... to help local governments and citizens conserve these ... a dataset of tidal-marsh observations first gathered by ... historical baseline can today,s researchers accurately map the ...
(Date:10/16/2014)... challenged conventional thinking on how the bowel lining develops ... how bowel cancer starts. , The researchers produced evidence ... the ,crypts, that are a feature of the bowel ... bowel cancer development, a controversial finding as scientists are ... 3D imaging technologies, Dr Chin Wee Tan and Professor ...
Breaking Biology News(10 mins):Emergency aid for overdoses 2Emergency aid for overdoses 3EPA grant will help localities conserve headwater wetlands 2EPA grant will help localities conserve headwater wetlands 3Cryptic clues drive new theory of bowel cancer development 2
... experiences trauma or disease, such as muscular dystrophy, ... cells" respond to repair and regenerate the muscle. ... such as muscular dystrophy, which affect muscle stability ... used time-lapse photography to document satellite cell movements ...
... PHILADELPHIA Although acute myeloid leukemia (AML) is relatively ... the risk, according to a recent paper published in ... of the American Association for Cancer Research. Julie ... and clinical research at the University of Minnesota, said ...
... to the poles, and you,ll notice that the ... equator. Move from lowland to mountains, and you,ll ... varied. Ecologists have proposed various explanations for these ... processes. New findings by University of ...
Cached Biology News:Caught on tape: Muscle stem cells captured on video by MU researcher 2Climate change and mountain building led to mammal diversity patterns 2
(Date:10/25/2014)... Charlotte, NC (PRWEB) October 24, 2014 ... high intensity focused ultrasound (HIFU) technology, announced that ... Carol, M.D. as Chief Executive Officer, President and ... new role Dr. Carol will take-on expanded responsibilities ... HIFU technology, as well as overseeing commercialization, manufacturing ...
(Date:10/25/2014)... NEW YORK , Oct. 24, 2014 ... Access Pharmaceuticals, Inc. (ACCP), a biopharmaceutical company advancing ... implemented a 1-for-50 reverse split of its common ... Friday, October 24, 2014. PlasmaTech,s common stock will ... number 72754H109 and temporary ticker symbol "ACCPD". After ...
(Date:10/25/2014)... October 24, 2014 ... ) has announced the addition of the  ... And Other 2-D Nanomaterials "  report to ... , ,CNTs and graphene are the strongest, ... man, with a performance-per-weight greater than any ...
(Date:10/22/2014)... 21, 2014 The Americas Inorganic ... refrigerants market in Americas with analysis and forecast ... the Americas Inorganic Refrigerants Market report, to get ... also provides a glimpse of the segmentation in ... by various tables and figures. , ...
Breaking Biology Technology:SonaCare Medical Board of Directors Appoints Dr. Mark Carol as CEO and President 2SonaCare Medical Board of Directors Appoints Dr. Mark Carol as CEO and President 3PlasmaTech Biopharmaceuticals, Inc. Announces Reverse Stock Split, Ticker Change and Launches New Corporate Website 2The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 2The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 3The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 4The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 2The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 3
... in a hexagonal, chicken wire structure holds great ... conductive, graphene may one day replace conventional silicon microchips, ... In addition to potential applications in integrated circuits, solar ... material has attracted the attention of physicists for its ...
... Inc. (NYSE Amex: NBS ), an international biopharmaceutical company ... will present on a panel at the 31st Annual Cowen Group ... March 7, 2011 at 1 PM and Dr. Robin Smith, the ... at 10:15 AM. The Conference will be held at the Boston ...
... Corporation (Nasdaq: VOLC ), a leading developer ... enhance the diagnosis and treatment of coronary and peripheral ... market the Eagle Eye® Platinum digital IVUS catheter in ... PCI Live Demonstration Course in Kurashiki, which starts on ...
Cached Biology Technology:Probing atomic chicken wire 2Probing atomic chicken wire 3Probing atomic chicken wire 4NeoStem to Present at Cowen Group 31st Annual Health Care Conference on March 7 and 8 2NeoStem to Present at Cowen Group 31st Annual Health Care Conference on March 7 and 8 3Volcano Announces the Introduction of the Eagle Eye® Platinum Digital IVUS Catheter at the 20th PCI Live Demonstration Course in Kurashiki 2Volcano Announces the Introduction of the Eagle Eye® Platinum Digital IVUS Catheter at the 20th PCI Live Demonstration Course in Kurashiki 3