Calcium carbonate

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Calcium 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

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Acid test: Study reveals both losers and winners of CO2-induced ocean acidification

Acid test: Study reveals both losers and winners of CO2-induced ocean acidification

Space & Earth / Earth Sciences

created Dec 01, 2009 | popularity 4.3 / 5 (13) | comments 8

(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.


Watching Proteins Direct Crystal Growth One Step at a Time (w/ Video)

Watching Proteins Direct Crystal Growth One Step at a Time (w/ Video)

Nanotechnology / Nanophysics

created Dec 16, 2009 | popularity 5 / 5 (2) | comments 0

(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 ...


All decked out: Networks of chitin filaments are integral components of diatom silica shells

Chemistry / Biochemistry

created Dec 01, 2009 | popularity 5 / 5 (1) | comments 0

(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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Breathlessness eased in patients with rare, often fatal disease

Medicine & Health / Diseases

created 5 hours ago | popularity not rated yet | comments 0

Patients with a rare, deadly disease that mostly affects young women felt a dramatic reduction in breathlessness using an approved drug, according to study results published online today in The Journal of Heart and Lung Tr ...


Light used to map effect of neurons on one another

Light used to map effect of neurons on one another

Medicine & Health / Neuroscience

created 7 hours ago | popularity 5 / 5 (2) | comments 0

(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 ...


New Study of Meteorite Provides More Evidence for Ancient Life on Mars

New Study of Meteorite Provides More Evidence for Ancient Life on Mars

Space & Earth / Space Exploration

created 9 hours ago | popularity 4.9 / 5 (19) | comments 11

(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, ...


New research may help to clean drainage from abandoned mines

New research may help to clean drainage from abandoned mines

Space & Earth / Environment

created Dec 16, 2009 | popularity 4.7 / 5 (3) | comments 0

(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 ...


Lithium

Lithium to be extracted from geothermal waste

Technology / Energy

created Dec 14, 2009 | popularity 5 / 5 (15) | comments 4

(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 ...


Vermicompost from pig manure grows healthy hibiscus

Space & Earth / Environment

created Dec 10, 2009 | popularity 5 / 5 (2) | comments 0

Vermicomposting, the practice of using earthworms to turn waste into nutrient-rich fertilizer, can be an economical, organic waste management practice. During vermicomposting, earthworms and microorganisms stabilize organic ...


Absorbing Hydrogen Fluoride Gas to Enhance Crystal Growth

Absorbing Hydrogen Fluoride Gas to Enhance Crystal Growth

Physics / Condensed Matter

created Dec 10, 2009 | popularity 5 / 5 (2) | comments 0

(PhysOrg.com) -- Two scientists at the U.S. Department of Energy's Brookhaven National Laboratory have developed a method to control the buildup of hydrogen fluoride gas during the growth of precision crystals ...


Sticks and stones break bones, but new study may prevent it

Medicine & Health / Research

created Dec 09, 2009 | popularity 4 / 5 (1) | comments 0

The best way to prevent a fracture is to stop bones from reaching the point where they are prone to breaking, but understanding the process of how bones form and mature has been challenging. Now researchers at the University ...


ADA releases updated position paper on nutrient supplementation

Medicine & Health / Other

created Dec 08, 2009 | popularity not rated yet | comments 0

While supplements can help some people meet their nutrition needs, eating a wide variety of nutrient-rich foods is the best way for most people to obtain the nutrients they need to be healthy and reduce their risk of chronic ...


Antioxidant compound reduced incidence of colorectal metachronous adenomas

Medicine & Health / Cancer

created Dec 08, 2009 | popularity 4.5 / 5 (2) | comments 0

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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