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
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 ...
Seafloor Fossils Provide Clues on Climate Change
Space & Earth / Earth Sciences
Oct 22, 2009 |
4 / 5 (6) |
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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 ...
Research finds higher acidity in Alaska waters
Space & Earth / Earth Sciences
Aug 24, 2009 |
3.1 / 5 (7) |
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(AP) -- Erosion threatens to topple coastal Alaskan villages. Melting ice threatens polar bears. Now, a marine scientist says the state's marine waters are turning acidic from absorbing greenhouse gases faster ...
The adherence mechanism of red algae to the rocks is discovered
Aug 03, 2009 |
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Geologists of the University of Granada, Spain, have described for the first time ever the biological mechanism that explains how calcareous red algae grow on rocky substrates.
Making nanoparticles in artificial cells
Nanotechnology / Bio & Medicine
Jun 26, 2009 |
5 / 5 (1) |
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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 ...
Scientists: Global warming has already changed oceans
Space & Earth / Earth Sciences
Jun 10, 2009 |
4.2 / 5 (63) |
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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 ...
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 ...
Shellfish face an uncertain future in a high CO2 world
May 27, 2009 |
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Overfishing and disease have decimated shellfish populations in many of the world's temperate estuarine and coastal ecosystems. Smithsonian scientists, led by Whitman Miller, ecologist at the Smithsonian Environmental Research ...
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 ...
Focus on the formation of bones, teeth and shells
Nanotechnology / Bio & Medicine
May 14, 2009 |
4 / 5 (1) |
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Researchers at Eindhoven University of Technology for the first time have shown the earliest stages in biomineralization, the process that leads to the formation of bones, teeth and sea shells.
Study finds dairy better for bones than calcium carbonate
Apr 28, 2009 |
5 / 5 (1) |
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A Purdue University study shows dairy has an advantage over calcium carbonate in promoting bone growth and strength.
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.
First high-resolution images of bone, tooth and shell formation
Nanotechnology / Bio & Medicine
Mar 12, 2009 |
5 / 5 (4) |
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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 ...
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 |
4.8 / 5 (9) |
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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.
