calcium carbonate

Definitions

  • WordNet 3.6
    • n calcium carbonate a salt found in nature as chalk or calcite or aragonite or limestone
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Usage

In literature:

While the arcs with plain carbons are bluish-white, those with carbons containing calcium fluoride have a notable golden glow.
"Edison, His Life and Inventions" by Frank Lewis Dyer and Thomas Commerford Martin
These signs indicate calcium carbonate.
"The Wonders of Instinct" by J. H. Fabre
Mineral matters are inorganic, being chlorides, carbonates or phosphates of calcium, sodium and potassium.
"The Home of the Blizzard" by Douglas Mawson
The next we have to consider is limestone, which is mainly made up of a substance known to chemists as calcium carbonate, or carbonate of lime.
"Scientific American Supplement, No. 447, July 26, 1884" by Various
During the fermentation it is necessary to neutralize the acetic acid formed with sodium or calcium carbonate.
"Creative Chemistry" by Edwin E. Slosson
Calcium is not precipitated by sulphuretted hydrogen, but falls as the carbonate when an alkaline carbonate is added to a solution.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4" by Various
The carbonates, especially calcium carbonate, constitute great strata of rocks, and are found in almost every locality.
"An Elementary Study of Chemistry" by William McPherson
Pure paper was allowed to ferment in the presence of calcium carbonate at a temperature of 35 deg.
"Researches on Cellulose" by C. F. Cross
Silicate of soda will precipitate calcium carbonate with the formation of a gelatinous silicate of lime and carbonate of soda.
"Steam, Its Generation and Use" by Babcock & Wilcox Co.
Our chalk hills, for example, are formed by a combination of carbon, oxygen, and calcium.
"Fragments of science, V. 1-2" by John Tyndall
These signs indicate calcium carbonate.
"The Glow-Worm and Other Beetles" by Jean Henri Fabre
It is a very impure form of carbon, containing on the average about 80% of calcium phosphate.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3" by Various
Aragonite is the more unstable of the two modifications of calcium carbonate.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3" by Various
The soap is then salted out and allowed to settle out the calcium carbonate.
"Soap-Making Manual" by E. G. Thomssen
Take, for instance, the dissociation of calcium carbonate into calcium oxide and carbon dioxide.
"The Phase Rule and Its Applications" by Alexander Findlay
It may also contain calcium and magnesium carbonate and mineral jelly.
"The New Gresham Encyclopedia" by Various
Barium sulphate, silica, asbestine, china clay, and calcium carbonate are the standard crystalline pigments.
"Paint Technology and Tests" by Henry A. Gardner
The urine of pack rats is creamy in color and contains calcium carbonate.
"Comparative Ecology of Pinyon Mice and Deer Mice in Mesa Verde National Park, Colorado" by Charles L. Douglas
Iron, nickel, calcium, manganese, sodium, cobalt, and carbon are among the elements most strongly identified.
"Astronomy" by David Todd
From the sea water the polyps secrete calcium carbonate and build it up into the stony framework which supports their colonies.
"The Elements of Geology" by William Harmon Norton
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In news:

The problem for creatures with calcium carbonate shells is that CO2 is a soluable gas that produces carbonic acid when it mixes with water.
That decreases the amount of calcium carbonate, used by marine creatures to construct shells or skeletons.
The carbonic acid is buffered by calcium in seawater to form calcium carbonate, a chalky substance that sea creatures use to make their shells.
Can our calcium carbonate "waste" be utilized in other industries so we can divert it from landfills.
As part of our process, calcium carbonate is created at a refinery that utilizes a process called carbonization for primary purification.
Beyond Nature's Imagination: Novel Applications of a Unique, Cementitious Calcium Carbonate .
If success is measured in square footage of trade-show booth space, calcium carbonate is destined to become the material of choice in Europe's flexible food pouches.
Researchers have known for years that carbonated beverages are bad for bone health, presumably because soda has replaced calcium-rich milk and fortified juices in kids' diets.
Nitrates in concentrations above 10 ppm expressed as N* (this can be expressed as 35.7 ppm as calcium carbonate or 44.3 ppm as nitrate) are considered unsafe.
Nestle issued the recall after its ingredient supplier, Omaya Inc, recalled some of the calcium carbonate used in the powder.
We neutralize a waste product with calcium carbonate prior to processing for disposal.
A manufacturer of calcium carbonate challenged the patent, pointing out that particle films have been used on plants for years.
I have been bothered for some time with the prolific advertisements throughout the media, touting calcium-carbonate antacids for calcium supplementation .
Rising ocean acidification caused by seas absorbing more carbon dioxide is disrupting the ability of corals to build their calcium carbonate structures.
Nanolipogels for anticancer drug delivery, inhalable and thermo-responsive, fat-encased nanoparticles for targeted drug delivery, and calcium carbonate microspheres are some recent developments.
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In science:

We have developed a novel technique to grow nearly perfectly spherical crystals of the calcium carbonate mineral vaterite, which has similar birefringence properties to calcite, within the required size regime.
Optical microrheology using rotating laser-trapped particles
An interesting feature in the spectrum of warm carbon stars is the infrared triplet due to ionised Calcium (λ ∼ 8498, 8543 and 8662
R Coronae Borealis stars in the Galactic Bulge discovered by EROS-2
When looking at a picture through crystal of Icelandic spar (calcium carbonate, calcite) he saw two displaced images.
Angular Momentum of Electromagnetic Radiation. Fundamental physics applied to the radio domain for innovative studies of space and development of new concepts in wireless communications
Contributions from hydrogen, helium, carbon, nitrogen, oxygen, neon, magnesium, silicon, sulphur, calcium and iron are considered.
Influence of baryons on the orbital structure of dark matter haloes
In 1935 Aston discovered 57Fe at Cavendish and described the results in his article The Isotopic Constitution and Atomic Weights of Hafnium, Thorium, Rhodium, Titanium, Zirconium, Calcium, Gallium, Silver, Carbon, Nickel, Cadmium, Iron and Indium .
Discovery of the Iron Isotopes
Aston described the discovery of 106Cd in the 1935 article The Isotopic Constitution and Atomic Weights of Hafnium, Thorium, Rhodium, Titanium, Zirconium, Calcium, Gallium, Silver, Carbon, Nickel, Cadmium, Iron and Indium .
Discovery of the Cadmium Isotopes
Aston described the discovery of 108Cd in the 1935 article The Isotopic Constitution and Atomic Weights of Hafnium, Thorium, Rhodium, Titanium, Zirconium, Calcium, Gallium, Silver, Carbon, Nickel, Cadmium, Iron and Indium .
Discovery of the Cadmium Isotopes
Profiting from this developments, recently much more precise cross section measurements for coherent π0 photoproduction from carbon, calcium, niobium and lead nuclei became available .
Nuclear mass form factors from coherent photoproduction of $\pi^0$ mesons
It is quite good for carbon and calcium, but less so for lead.
Nuclear mass form factors from coherent photoproduction of $\pi^0$ mesons
However, natural niobium is mono-isotopic, and in case of carbon and calcium the admixture of other isotopes than 12 C and 40Ca is negligible at the current level of precision.
Nuclear mass form factors from coherent photoproduction of $\pi^0$ mesons
Left hand side: position and height of the first maximum of the form factors for carbon, calcium and lead.
Nuclear mass form factors from coherent photoproduction of $\pi^0$ mesons
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