CALCIUM CARBONATE

CaCO3, white chemical compound that is the most common nonsiliceous mineral. It occurs in two crystal forms: calcite, which is hexagonal, and aragonite, which is rhombohedral. Calcium carbonate is largely insoluble in water but is quite soluble in water containing dissolved carbon dioxide, combining with it to form the bicarbonate Ca(HCO3)2. Such reactions on limestone (which is mainly composed of calcite) account for the formation of stalactites and stalagmites in caves. Iceland spar is a pure form of calcium carbonate and exhibits birefringence, or double refraction.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Calcium Carbonate
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books on: Calcium Carbonate  - 919 results

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1.
The Sea off Southern California: A Modern Habitat of Petroleum
Book by K. O. Emery; Wiley, 1960
Subjects: Marine Biology--Pacific Ocean, Ocean Bottom--Pacific Ocean, Petroleum--Geology--Pacific Ocean, Submarine Geology
...Size and Percent age of Calcium Carbonate 218 Sorting of Sediment...Depth and Age Distribution of Calcium Carbonate 222...the water can contain more calcium carbonate, bicarbonate, or borate than...
2.
Radioecology: Proceedings of the First National Symposium on Radioecology Held at Colorado State University, Fort Collins, Colorado, September 10-15, 1961
Book by Vincent Schultz, Alfred W. Klement Jr.; Reinhold Pub. Corp., 1963
Subjects: Radioecology--Congresses
...Ions on the Concentration of Radio calcium and Radiostrontium by Euryhaline Teleosts...The Strontium and Calcium Relationships in Clinch and Tennessee...The Radioecology of Calcium 525 Sidney C. Hsiao...
3.
Chambers's Technical Dictionary
Book by C. F. Tweney, L. E. C. Hughes; Macmillan, 1958
Subjects: Technology--Dictionaries
...in acetone 25 times its volume at N.T.P. , and in water. B.p. -84 C., sp. gr. 0 91. Prepared by the action of water on calcium carbide. Used for welding, illuminating, acetic acid synthesis, and for manufacturing derivatives. achalasia Med...
4.
An Introduction to Oceanography
Book by Cuchlaine A. M. King; McGraw-Hill, 1963
Subjects: Oceanography
...The chalk of Europe was laid down at this time and calcium carbonate formation may also have been active in the deep ocean...C 14 dating. Correlation with tropical oceanic carbonate productivity rate, assuming steady Fe and Ti accumulation...
5.
Oceanography; Invited Lectures Presented at the International Oceanographic Congress Held in New York, 31 August-12 September 1959
Book by Mary Sears; American Association for the Advancement of Science, 1961
Subjects: Oceanography--Congresses
...grains are hollow shells of calcium carbonate; these delicate shells after...indicated as for a clay shale. Calcium carbonate is easily cemented and replaced...being the most important. If calcium carbonate is relatively easy to convert...
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journal articles on: Calcium Carbonate  - 82 results

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1.
Calcium Intake Affects Weight Loss
Journal article; JOPERD--The Journal of Physical Education, Recreation & Dance, Vol. 71, 2000
Subjects: Calcium (Nutrients)--Usage, Calcium, Dietary--Usage, Fat--Care and treatment, Fats--Care and treatment, Low fat diet--Methods, Low-fat diet--Methods, University of Tennessee--Research
...The mice that received this dosage in the form of a calcium carbonate supplement lost 42 percent of their body fat and...antacids are a cheap source of calcium (in the form of calcium carbonate), yet the amount of antacid needed to reach the recommended...
2.
Contribution of Lead from Calcium Supplements to Blood Lead
Journal article by Brian L. Gulson, Karen J. Mizon, Jacqueline M. Palmer, Michael J. Korsch, Alan J. Taylor; Environmental Health Perspectives, Vol. 109, 2001
...other treatment group (n = 7) calcium carbonate. The control group (n = 6...compositions in blood for the calcium carbonate supplement showed increases...baseline to treatment for the calcium carbonate supplement differed from that...
3.
Blood Lead Changes during Pregnancy and Postpartum with Calcium Supplementation
Journal article by Brian L. Gulson, Karen J. Mizon, Jacqueline M. Palmer, Michael J. Korsch, Alan J. Taylor, Kathryn R. Mahaffey; Environmental Health Perspectives, Vol. 112, 2004
...Australia were provided with either calcium carbonate or a complex calcium supplement...Hernandez-Avila et al. 1996). Calcium carbonate supplementation of 1,200 mg...composition of the blood with a calcium carbonate supplement indicating that...
4.
Lead in Calcium Supplements
Journal article by Genine M. Scelfo, A. Russell Flegal; Environmental Health Perspectives, Vol. 108, 2000
...various organic chelates. Calcium carbonate (CaCO.sub.3) was the most...measurements for a highly refined calcium carbonate powder for four laboratories...Alumino-silicate content in calcium supplements derived from various carbonate deposits. Bull Environ...
5.
Uncoupling of ATP-Mediated Calcium Signaling and Dysregulated Interleukin-6 Secretion in Dendritic Cells by Nanomolar Thimerosal
Journal article by Samuel R. Goth, Ruth A. Chu, Jeffrey P. Gregg, Gennady Cherednichenko, Isaac N. Pessah; Environmental Health Perspectives, Vol. 114, 2006
Subjects: Dendritic cells
...TSA solutions were dissolved in sodium carbonate using borosilicate glass pipettes and...analyzed). Immunocytofluorescence of calcium channels. DCs were washed in 1% bovine...hr and then immersed in 4% diethylpyro-carbonate: ethanol prechilled to -20degreesC for...
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magazine articles on: Calcium Carbonate  - 60 results

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1.
The Next Ocean: Humanity's Extra C[O.Sub.2] Could Brew a New Kind of Sea
Magazine article by Susan Milius; Science News, Vol. 173, March 15, 2008
Subjects: Calcium carbonate--Research, Kelps--Research
...coccolithophores create structures of calcium carbonate. A CO.sub.2 boost makes this...A key ingredient in making calcium carbonate is the carbonate ion, CO.sub...seas as plankton also need calcium carbonate to build. Microscopic coccolithophores...
2.
Test Your Calcium IQ
Magazine article; USA Today (Society for the Advancement of Education), Vol. 124, October 1995
Subjects: Calcium (Nutrients)--Tests, problems and exercises, Calcium in the body--Tests, problems and exercises, Calcium, Dietary--Tests, problems and exercises, Osteoporosis--Tests, problems and exercises
...getting their calcium through diet may need calcium supplements. "If you do take a supplement, its better to use calcium carbonate, which, unit for unit, is better absorbed than other forms of calcium," Hunt explains. 8. False. Caucasian and...
3.
Rest in Peace Nanobacteria, You Were Not Alive after All: Mystery Particles Made of Minerals and Proteins May Still Cause Disease
Magazine article by Tina Hesman Saey; Science News, Vol. 173, May 10, 2008
Subjects: Bacteria--Health aspects, Bacteria--Observations, Calcium compounds--Composition, Nanoparticles--Health aspects, Nanoparticles--Observations
...When the researchers made calcium carbonate in a solution used to nourish...Then the researchers made the calcium carbonate particles grow by seeding the...nanoparticles but keeps the calcium carbonate from forming crystals, Young...
4.
What's in an Antacid?
Magazine article by Tom Cramer; FDA Consumer, Vol. 26, January 1992
Subjects: Aluminum--Physiological aspects, Antacids--Composition, Calcium (Metal)--Physiological aspects, Calcium--Physiological aspects, Magnesium--Physiological aspects, Sodium--Physiological aspects
...in the form of calcium carbonate or calcium phosphate...heavy doses of calcium (more than five...in many forms--carbonate, glycinate, hydroxide...aluminum (hydroxide, carbonate gel, or phosphate...dietary phosphates, calcium and fluoride to...
5.
Carbon Emissions Are Undermining Coral Reefs' Ability to Repair Themselves
Magazine article; Geographical, Vol. 80, November 2008
Subjects: Coral reefs and islands--Protection and preservation, Coral reefs--Protection and preservation, Emissions (Pollution)--Influence
...repair themselves. They need calcium carbonate to mend holes created by sea...reduces levels of dissolved calcium carbonate. Scientists believe that before...lived in water with enough calcium carbonate. Now, nearly half live in areas...
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newspaper articles on: Calcium Carbonate  - 63 results

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1.
WALES: The Pub Put Its Flag at Half-Mast. That's How Well He Was Thought of; House Fire Victim Was 'Caring' Man
Newspaper article; Daily Post (Liverpool, England), June 2, 2007
Subjects: Calcium carbonate, Fires--United Kingdom
2.
The Curry King, His [Pounds Sterling]100m and a Family at War Again; Britain's Mostsuccessful Indian Food Company Was Begun in a Tiny London Kitchen 50 Years Ago by a Man with [Pounds Sterling]5 in His Pocket. Now Its Sale Has Reopened Old Family Wounds
Newspaper article; The Evening Standard (London, England), May 30, 2007
Subjects: Calcium carbonate, Food, Food industry
3.
The Benefits of Calcium
Newspaper article; Manila Bulletin, April 16, 2008
Subjects: Osteoporosis
...available in many forms - tablets, capsules, chewable, powder, and liquid. Many in a form of mineral salts, such as calcium carbonate, calcium gluconate, calcium lactate and calcium citrate. Published studies conducted by the Journal of Clinical...
4.
Scientists Go to Ground for Answers; Soil Study May Help with Climate Change
Newspaper article; The Journal (Newcastle, England), April 1, 2008
Subjects: Atmospheric carbon dioxide, Climate change, Climatic changes, Scientists, University of Newcastle upon Tyne
...to form the harmless mineral calcium carbonate. The carbon then stays securely locked in the calcium carbonate, which simply remains in the...The team will first look for calcium carbonate in natural soils that have...
5.
Mars Did Have Water ... and It Still Has Snowfall
Newspaper article; The Evening Standard (London, England), September 30, 2008
Subjects: Mars (Planet)
...its Martian landing site and spotted falling snow for the first time, scientists said. Soil experiments revealed calcium carbonate and sheet silicate, known to be formed in liquid water. A laser aboard the Phoenix recently detected snow falling...
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encyclopedia articles on: Calcium Carbonate  - 43 results

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1.
Calcium Carbonate
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
CALCIUM CARBONATE CaCO 3 , white chemical compound...aragonite, which is rhombohedral. Calcium carbonate is largely insoluble in water but...caves. Iceland spar is a pure form of calcium carbonate and exhibits birefringence, or double...
2.
Carbonate
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...Smelling salts is ammonium carbonate. Calcium carbonate is found in shells...the production of lime ( calcium oxide ). Barium carbonate occurs as the mineral witherite...and in dolomite (with calcium carbonate). Iron carbonate is a ferrous...
3.
Calcium Oxide
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...magnesia. It is prepared by heating calcium carbonate (e.g., limestone ) in a special...into the oxide and carbon dioxide. Calcium oxide is widely used in industry...preparing bleaching powder , calcium carbide, and calcium cyanamide...
4.
Calcium Hydroxide
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...readily reacts with carbon dioxide, CO 2 , to form calcium carbonate, a mixture of gases can be tested for the presence...a clear container; if CO 2 is present, a cloudy calcium carbonate precipitate will form. ____________________ Copyright...
5.
Calcium
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...essential to the formation and maintenance of strong bones and teeth. In the human adult the bone calcium is chiefly in the form of the phosphate and carbonate salts. A sufficient store of vitamin D in the body is necessary for the proper utilization...
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