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
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 |
4.3 / 5 (13) |
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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 ...
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Researchers find increased dairy intake reduces risk of uterine fibroids in black women
Dec 04, 2009 |
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Boston University School of Medicine (BUSM) researchers at the Slone Epidemiology Center found that black women with high intake of dairy products have a reduced incidence of uterine leiomyomata (fibroids). This report, based ...
New Study of Meteorite Provides More Evidence for Ancient Life on Mars
Space & Earth / Space Exploration
Dec 17, 2009 |
4.9 / 5 (30) |
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(PhysOrg.com) -- In 1996, when scientists examined a meteorite from Mars previously uncovered in Antarctica, they were intrigued by what looked like microscopic fossils of ancient Martian life forms. Now, ...
Lithium to be extracted from geothermal waste
Dec 14, 2009 |
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(PhysOrg.com) -- A technique developed by a Californian company, Simbol Mining, will enable the valuable mineral lithium, widely used in high-density batteries, to be reclaimed from the hot waste water produced ...
Light used to map effect of neurons on one another
Medicine & Health / Neuroscience
Dec 17, 2009 |
5 / 5 (3) |
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(PhysOrg.com) -- Scientists at Harvard University have used light and genetic trickery to trace out neurons' ability to excite or inhibit one another, literally shedding new light on the question of how neurons ...
The benefits of stress ... in plants
Nov 19, 2009 |
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Chronic stress in humans has been implicated in heart disease, weight gain, and diabetes, among a host of other health problems. Extreme environments, a source of chronic stress, present a challenge even for the hardiest ...
Acid oceans: the 'evil twin' of climate change
14 hours ago |
4.3 / 5 (10) |
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(AP) -- Far from Copenhagen's turbulent climate talks, the sea lions, harbor seals and sea otters reposing along the shoreline and kelp forests of this protected marine area stand to gain from any global ...
New research may help to clean drainage from abandoned mines
Dec 16, 2009 |
4.8 / 5 (4) |
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(PhysOrg.com) -- In a quiet green glen near Ashville, Pa., lies a rust-colored pond. A deep, rectangular hole in the ground, it somewhat resembles an Olympic-sized pool. Few people, however, would make the ...
A RANK insider resolving the enigma of the fever chart
Nov 25, 2009 |
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Mammals have evolved a complex system for controlling bone remodeling. Babies require calcium for healthy bones and they obtain it from their mother's milk. Nursing mothers release calcium from their bones. Surprisingly, ...
New understanding about mechanism for cell death after stroke leads to possible therapy
Nov 22, 2009 |
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Scientists at the Brain Research Centre, a partnership of the University of British Columbia Faculty of Medicine and Vancouver Coastal Health Research Institute, have uncovered new information about the mechanism by which ...
Antioxidant compound reduced incidence of colorectal metachronous adenomas
Dec 08, 2009 |
4.5 / 5 (2) |
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Supplementation with a selenium-based antioxidant compound decreased the risk of developing new polyps of the large bowel — called colorectal metachronous adenomas — in people who previously had colorectal polyps removed.
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