Calcium carbonate
hideCalcium carbonate is a chemical compound with the chemical formula CaCO3. It is a common substance found in rock in all parts of the world, and is the main component of shells of marine organisms, snails, pearls, and eggshells. Calcium carbonate is the active ingredient in agricultural lime, and is usually the principal cause of hard water. It is commonly used medicinally as a calcium supplement or as an antacid, but high consumption can be hazardous.
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News tagged with calcium carbonate
Dental delight! Tooth of sea urchin shows formation of biominerals
Dec 21, 2009 |
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(PhysOrg.com) -- Some of the most common minerals in biology, including those in bones and shells, have a mysterious structure: Their crystals are positioned in the same orientation, making them behave as ...
Watching Proteins Direct Crystal Growth One Step at a Time (w/ Video)
Dec 16, 2009 |
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(PhysOrg.com) -- Scientists at Berkeley Lab's Molecular Foundry imaged the growth of protein-studded mineral surfaces with unprecedented resolution and provided a glimpse into how living systems engineer key ...
Acid test: Study reveals both losers and winners of CO2-induced ocean acidification
Space & Earth / Earth Sciences
Dec 01, 2009 |
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(PhysOrg.com) -- As the world’s seawater becomes more acidic due to rising atmospheric carbon dioxide, some shelled marine creatures may actually become bigger and stronger, according to a new study.
All decked out: Networks of chitin filaments are integral components of diatom silica shells
Dec 01, 2009 |
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(PhysOrg.com) -- A whole microcosm of various bizarrely shaped life forms opens up when you look at diatoms, the primary component of ocean plankton, under a microscope. The regularly structured silica shells of these tiny ...
Mollusks taste memories to build shells (w/Video)
Apr 02, 2009 |
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University of California, Berkeley, graduate student Alistair Boettiger has amassed a beautiful collection of seashells, but not by combing the beach. He created them in his computer.
A crystal clear view of chalk formation
Jan 23, 2009 |
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(PhysOrg.com) -- It has a beautiful, but also an unpleasant side: crystallization determines the shape of precious stones, but also causes the lime scale in washing machines. How this comes about, has been ...
Fish guts explain marine carbon cycle mystery
Space & Earth / Earth Sciences
Jan 15, 2009 |
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Research published today reveals the major influence of fish on maintaining the delicate pH balance of our oceans, vital for the health of coral reefs and other marine life.
A crystal clear view of chalk formation
Jan 12, 2009 |
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(PhysOrg.com) -- It has a beautiful, but also an unpleasant side: crystallization determines the shape of precious stones, but also causes the lime scale in washing machines. How this comes about, has been ...
Seafloor Fossils Provide Clues on Climate Change
Space & Earth / Earth Sciences
Oct 22, 2009 |
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Deep under the sea, a fossil the size of a sand grain is nestled among a billion of its closest dead relatives. Known as foraminifera, these complex little shells of calcium carbonate can tell you the sea ...
Ocean acidification may contribute to global shellfish decline
Space & Earth / Earth Sciences
Oct 26, 2009 |
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Relatively minor increases in ocean acidity brought about by high levels of carbon dioxide have significant detrimental effects on the growth, development, and survival of hard clams, bay scallops, and Eastern ...
First high-resolution images of bone, tooth and shell formation
Nanotechnology / Bio & Medicine
Mar 12, 2009 |
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Researchers at Eindhoven University of Technology (The Netherlands) have for the first time made high-resolution images of the earliest stages of bone formation. They used the world's most advanced electron ...
Scientists: Global warming has already changed oceans
Space & Earth / Earth Sciences
Jun 10, 2009 |
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In Washington state, oysters in some areas haven't reproduced for four years, and preliminary evidence suggests that the increasing acidity of the ocean could be the cause. In the Gulf of Mexico, falling oxygen levels in ...
Making nanoparticles in artificial cells
Nanotechnology / Bio & Medicine
Jun 26, 2009 |
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Two new construction manuals are now available for the world's smallest lamps. Based on these protocols, scientists from the Max Planck Institute of Colloids and Interfaces have tailor-made nanoparticles that ...
How Solid Is Concrete's Carbon Footprint?
May 18, 2009 |
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(PhysOrg.com) -- Many scientists currently think at least 5 percent of humanity's carbon footprint comes from the concrete industry, both from energy use and the carbon dioxide (CO2) byproduct from the produc ...
Studies shed light on collapse of coral reefs (w/Video)
May 28, 2009 |
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An explosion of knowledge has been made in the last few years about the basic biology of corals, researchers say in a new report, helping to explain why coral reefs around the world are collapsing and what ...
