Climate change stories from the abyss
An international team of scientists have shed new light on the world's history of climate change.
Earth Sciences
Aug 29, 2012
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Page 3 - News tagged with calcite
X-rays reveal why sea urchins are no easy prey
(PhysOrg.com) -- The spine of a sea urchin is 99.9% chalk, a very common material forming tiny crystals that are very hard but easy to break apart. Scientists have now discovered how these marine animals use chalk or lime ...
Analytical Chemistry
Feb 14, 2012
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Viking 'sunstone' more than a myth
Ancient tales of Norse mariners using mysterious sunstones to navigate the ocean when clouds obscured the Sun and stars are more than just legend, according to a study published Wednesday.
Archaeology
Nov 2, 2011
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Crystal clear research
(PhysOrg.com) -- Scientists have successfully created synthetic crystals whose structures and properties mimic those of naturally occurring biominerals such as seashells.
Nanomaterials
Sep 6, 2011
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Ever-sharp urchin teeth may yield tools that never need honing
(PhysOrg.com) -- To survive in a tumultuous environment, sea urchins literally eat through stone, using their teeth to carve out nooks where the spiny creatures hide from predators and protect themselves from the crashing ...
Condensed Matter
Dec 22, 2010
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Microscopy reveals structure of calcite shells
(PhysOrg.com) -- Lara Estroff and colleagues have taken a deep, detailed look at the way lab-created calcite crystals, similar to those found in nature, grow in tandem with proteins and other large molecules.
Materials Science
Nov 30, 2009
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As ocean surfaces acidify, a deep-sea acidic zone is expanding, and marine habitats are being squeezed
In the deepest parts of the ocean, below 4,000 meters, the combination of high pressure and low temperature creates conditions that dissolve calcium carbonate, the material marine animals use to make their shells.
Earth Sciences
Jul 9, 2024
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Microbially induced carbonate precipitation can improve coarse-grained, salty soil
Microbially induced carbonate precipitation (MICP) is a cost-effective and environmentally friendly technology to improve saline soil. It aims to use urease generated by bacteria to catalyze urea hydrolysis and produce carbonate, ...
Biochemistry
Sep 16, 2022
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Stone Age discovery shows Homo sapiens survived in the Kalahari
Researchers have discovered Homo sapiens did indeed live and survive in the Kalahari Desert more than 20,000 years ago.
Archaeology
Aug 17, 2022
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Stabilizing a cliff using biomineral binders
EPFL spin-off Medusoil has successfully tested its ground-stabilization process on cliffs subject to surface erosion. The company's biomineral-based solution can be used to stabilize sandy and gravelly subsoils to safeguard ...
Biochemistry
Nov 20, 2019
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